Antenna Feed Networks | Dolph Microwave

WR75 Waveguide Bandpass Filter

Dolph — Wed, 13 Aug 2025 06:12:30 +0000

Dolph Microwave – Waveguide filtering

Define the filter mask before confirming the WR75 build.

Dolph Microwave supplies WR75 waveguide bandpass filter configurations for a specified frequency mask. WR75 identifies the waveguide interface, not the filter passband. Confirm insertion loss, rejection, return loss, power and dimensions against the quotation and approved drawing before ordering.

Send the Filter Mask

Waveguide

WR75 interface

Response

Project-defined passband

Rejection

Specify stopband mask

Release

Datasheet or drawing

Configuration inputs

Send the details that control the final configuration

Passband

State both passband edges in GHz, maximum insertion loss across that band and allowed peak-to-peak ripple. Add group-delay limits if the signal requires them.

Rejection bands

List each stopband interval and minimum attenuation in dB. Identify whether rejection is absolute transmission loss or relative to a passband reference; include the transition regions between bands.

Loss and match

Specify minimum return loss or maximum VSWR at both ports over the passband. Return loss is positive: S11 = −20 dB corresponds to 20 dB return loss and about 1% reflected incident power.

Power and mechanics

Provide average and peak power, pulse width, duty cycle, source/load mismatch and temperature. Attach flange designations, available length, mounting holes and clearance for fasteners.

Do not release a filter from a center frequency alone.

The passband, transition regions, stopband rejection, power and physical envelope must be reviewed together. Attach a frequency mask or existing drawing when possible.

Request Configuration Review

Engineering handoff

Define what the acceptance report must show.

Request measured S21 and port-match sweeps over the agreed passband and stopbands, with model or serial identification, test temperature and reference planes. Specify frequency resolution around narrow rejection points. Ask for a Touchstone file when the filter will be included in a system simulation.

Release documents

Approved frequency mask with units and limit directions
Drawing revision, flange details and port orientation
Agreed power and environmental conditions
Measured response, calibration reference and acceptance limits

Ask how the test setup separates the filter response from adapters and connecting waveguide. NIST’s waveguide calibration research evaluates dimensional and calibration uncertainties in measured scattering parameters; its WR15 study provides measurement methodology, not performance data for this WR75 filter.^[1]

Check the measurement system’s usable dynamic range before accepting a deep-rejection result. A trace at the noise floor gives a measurement limit, not proof of the filter’s full attenuation. Agree on how results near an acceptance boundary will account for uncertainty.

Low-power network-analyzer data do not establish high-power suitability. Confirm the required power test or analysis separately, including pulse conditions, temperature and pressure where applicable. Do not infer peak-power capability from a CW rating.

Related RF path

Check the components at both filter ports

Waveguide Transitions

When the adjoining waveguide differs, confirm the transition’s operating band and both flange drawings. Include its loss and match in the assembled RF path.

Waveguide Switches

Route the filtered RF path between operating states.

Straight Waveguide Sections

Specify rectangular WR75 sections with compatible flanges and sufficient clearance for assembly. A matching waveguide size alone does not confirm the bolt pattern or sealing arrangement.

Ready for a model check?

Send the frequency mask, power conditions, flange drawing, quantity and required test records. Mark any fixed installation dimensions so Dolph can assess the configuration and prepare a quotation.

Start an RFQ

The post WR75 Waveguide Bandpass Filter appeared first on DOLPH MICROWAVE.

Microwave Feedhorn

Dolph — Mon, 29 Jan 2024 07:30:56 +0000

Microwave Feedhorn Overview

Precision Feed Solutions for Reflector Antenna and Microwave Systems

Introducing the Dolph Microwave Feedhorn, a cutting-edge solution designed for the precise focusing and directing of microwave signals. Engineered with meticulous attention to detail, this feedhorn covers a wide range of frequency bands including C, X, Ku, and Ka, ensuring versatility across numerous microwave communication applications. Constructed from high-quality aluminum or copper, the Dolph Microwave Feedhorn is synonymous with durability and high performance. Available in both standard and customized configurations, it meets the diverse needs of modern satellite communication, radar systems, and radio telescopes.

Frequency BandsC, X, Ku and Ka

PolarizationLinear / Circular, Dual or Co-polarization

Published VSWR1.2:1

ConstructionAluminum or Copper

Performance and Integration

Key Features

The feedhorn configuration should be matched to the operating band, reflector geometry, polarization requirement, waveguide interface and target radiation performance of the complete antenna system.

Wide Frequency Coverage: Supports C, X, Ku, and Ka bands, catering to a broad spectrum of microwave communication needs.
Advanced Polarization Options: Offers Linear/Circular, Dual, or Co-polarization, enhancing signal clarity and reducing interference.
Exceptional VSWR: Boasts a Voltage Standing Wave Ratio (VSWR) of 1.2:1, indicating minimal signal reflection and maximum transmission efficiency.
Premium Material Construction: Precision machined from Aluminum (Al) or Copper (Cu), ensuring robustness and longevity.
High Performance: Designed for superior signal focusing and direction, optimizing the efficiency of microwave transmission systems.
Customization Availability: Provides options for both standard and tailored designs to perfectly fit specific system requirements.
Ease of Integration: Engineered to seamlessly integrate with existing microwave transmission equipment, simplifying setup and installation.

System Function

How a Feedhorn Supports Antenna Performance

A feedhorn forms the RF transition between a waveguide or feed network and free space. In reflector antenna assemblies, its geometry and position influence how energy illuminates the reflector, how efficiently the aperture is used and how unwanted spillover is controlled.

Transmit Operation

The feedhorn converts guided microwave energy into a controlled radiated field directed toward the reflector or target coverage region.

Supports controlled reflector illumination.
Provides the required polarization at the antenna feed point.
Connects to the selected waveguide or feed-network interface.

Receive Operation

The feedhorn collects microwave energy from the reflector and couples it into the receiving waveguide chain with the required impedance and polarization characteristics.

Supports efficient signal collection.
Helps control cross-polarization and spillover performance.
Integrates with OMT, polarizer, filter or receiver assemblies as required.

Define the Band

State the exact transmit and receive frequency ranges rather than only the general band designation.

Match the Reflector

Provide reflector type, focal ratio, feed position and required illumination or edge-taper target.

Confirm the Interface

Specify waveguide size, flange type, polarization orientation and the available mechanical envelope.

Typical Uses

Application Areas

Satellite Communication: Vital for transmitting and receiving signals in satellite communication systems, ensuring global connectivity.
Radar Systems: Enhances radar signal direction and focus, crucial for accurate detection and tracking in defense and weather forecasting.
Radio Telescopes: Plays a key role in focusing signals for radio astronomy, enabling the study of celestial phenomena.
Wireless Communication: Improves signal direction and focus in wireless communication networks, enhancing data transmission reliability.
Broadcasting: Essential for focusing signals in broadcasting systems, ensuring clear transmission of audio and video content.

Published Product Data

Technical Specifications

To provide a clearer understanding of the Dolph Microwave Feedhorn’s capabilities, here is a brief overview of its technical specifications:

Specification	Details
Frequency Bands	C, X, Ku, Ka
Polarization	Linear/Circular, Dual, Co-polarization
VSWR	1.2:1
Material	Aluminum (Al), Copper (Cu)

This table underscores the precision engineering and performance capabilities of the Dolph Microwave Feedhorn, highlighting its adaptability to various system requirements.

Specification note: Published catalog examples use different frequency ranges, reflector types, f/D values, horn diameters and interfaces. The final VSWR, radiation pattern, cross-polarization, material, flange and dimensions should be confirmed for the selected model and approved drawing.

Catalog Reference

Published Feedhorn Configuration Examples

The following rows consolidate representative configurations shown in the downloadable Dolph Microwave Feedhorn catalog. They are useful for preliminary comparison and do not replace a model-specific quotation or approved technical drawing.

Band	Published Frequency Range	VSWR	f/D	Taper	Half Illumination Angle	Cross Pol.	Horn Diameter	Interface	Antenna Type
S	2.025–2.12 / 2.2–2.4 GHz	1.3	0.33–0.45	5 dB	60°	25 dB	210 mm	TBD	Offset Antenna
C	3.4–4.2 GHz	1.3	0.33–0.45	5 dB	60°	25 dB	200 mm	TBD	Prime Focus
C	3.7–4.2 GHz	1.3	0.32–0.425	5 dB	60°	25 dB	200 mm	TBD	Prime Focus
C	3.4–6.725 GHz	1.2	0.575	8 dB	25°	25 dB	185 mm	Φ19 mm	Offset Antenna
Ku	10.7–12.75 GHz	1.2	0.33–0.45	8 dB	25°	25 dB	185 mm	WR75 / C120	Prime Focus
Ku	10.7–12.75 GHz	1.2	0.64	8 dB	27.5°	25 dB	95 mm	WR75 / C120	Offset Antenna
C & Ku	3.4–4.2 / 10.7–12.75 GHz	1.35	0.35	11–12 dB	30°	30 dB	364 mm	TBD	Cassegrain
C & Ku	3.625–4.2 / 10.7–12.75 GHz	1.4	0.35	11–12 dB	25°	30 dB	333 mm	TBD	Cassegrain
Ka	17.7–21.2 / 27.5–31.0 GHz	1.35	0.35	11–12 dB	30°	30 dB	50 mm	TBD	Cassegrain

Configuration Review

Polarization, Reflector and Interface Options

A useful feedhorn specification must define the complete electromagnetic and mechanical interface. Band name alone is not enough to select a production configuration.

Polarization

State linear H/V, circular polarization sense, dual-polarized or co-polarized operation, together with the required port arrangement and isolation or cross-polarization target.

Reflector Geometry

Identify prime-focus, offset or Cassegrain architecture and provide focal length, reflector diameter, f/D ratio, feed location and mechanical clearance.

Waveguide and Flange

Provide the waveguide size and required cover, grooved, choke, circular or project-specific flange. Confirm whether an IEC, EIA or customer drawing controls the interface.

Specification-Based Quotation

Information to Include in a Feedhorn RFQ

Providing complete system inputs reduces avoidable redesign and makes it possible to review electrical performance and mechanical integration together.

Request Technical Review

Frequency PlanExact transmit and receive ranges, bandwidth and any guard-band requirements.
PolarizationLinear or circular mode, orientation or sense, number of ports and isolation target.
Reflector DataReflector type, diameter, focal length, f/D and required illumination or edge taper.
RF PerformanceVSWR, return loss, cross-polarization, gain or pattern requirements and test method.
Mechanical InterfaceWaveguide, flange, mounting pattern, envelope, feed position and flange clocking.
Material and FinishAluminum or copper, surface treatment, paint, corrosion protection and environment.
Operating ConditionsPower level, temperature, pressure, outdoor exposure, vibration or other project conditions.
DocumentationRequired drawings, test data, inspection records, quantity and delivery schedule.

Engineered Feed Solutions

Elevating Microwave Systems to New Heights

The Dolph Microwave Feedhorn represents the pinnacle of microwave signal direction technology. It not only offers unparalleled precision and performance but also ensures that systems operate at their optimal parameters. With its robust construction, wide compatibility, and customization options, this feedhorn stands as a pivotal component in advancing microwave technology applications. Embrace the future of microwave transmission with the precision and reliability of Dolph’s Microwave Feedhorn, where every signal leads to new possibilities.

Need a standard or customized feedhorn?

Submit the frequency plan, polarization, reflector geometry, interface, quantity and required documentation for technical review.

Contact Dolph Microwave

Technical Documents

Downloads

Use the product catalog for preliminary configuration review and the flange document to compare published interface designations.

Product PDFMicrowave Feedhorn

Reference PDFFLANGE TYPE DESIGNATIONS INFORMATION

The post Microwave Feedhorn appeared first on DOLPH MICROWAVE.

Waveguide Filter

Dolph — Mon, 29 Jan 2024 07:30:27 +0000

11 model rowsPassband and rejection data

WR229–WR12Listed sizes; discrete models

Aluminum / copperCatalogue material options

View specifications Drawings & documents Download datasheet PDF

Filter construction and options

Filter functions

Listed examples: bandpass, lowpass and transmit-reject. The ordering key also includes highpass and receive-reject.

Interfaces and finish

Cover/grooved flanges, aluminum or copper, Iridite per MIL-C-5541 internal finish and anticorrosion black-painted body finish.

Configuration

Standard and requested configurations are described for satellite, radar, wireless, research and telecommunications systems. Specify rejection in dB at each required frequency.

Original specification sheet · Open full size

Standards and approval references

Specified surface-treatment standard

The original catalogue specifies Iridite per MIL-C-5541 for the inside finish. This is a finish specification; the four original finish rows are preserved in the table.

Download the original specification PDF

Specifications and configuration details

Filter model data

Model	Waveguide Size	Pass Freq. (Ghz)	Reject Freq. (Ghz)	VSWR Max.	IL (dB)
DH-40WBPF3.4T3.425PMA……	WR229	3.4-3.425		1.42	2
DH-40WTRF3.4T4.2PMA……	WR229	3.4-4.2	5.725-6.725	1.5	0.4
DH-40WBPF3.4T4.2PMA……	WR229	3.4-4.2		1.4	0.5
DH-40WBPF3.4T4.2PMA……	WR229	3.4-4.2		1.4	0.45
DH-40WBPF3.4T4.2PMA……	WR229	3.4-4.2		1.4	0.45
DH-40WBPF3.6T4.2PMA……	WR229	3.6-4.2		1.4	0.5
DH-220WLPF22.7T22.9PMA…	WR42	22.7-22.9		1.2	0.35
DH-260WLPF26T28.35PMA…	WR34	26.0-28.35		1.15	0.25
DH-320WBP33.0T37.0PMA…	WR28	33.0-37.0		1.42	0.9
DH-500WBPF42.6T44.6PMC…	WR19	42.6-44.6		2	1
DH-740WBPF72T74PMC…	WR12	72.0-74.0		2	1

Abbreviated model strings, repeated rows and empty cells are retained from the catalogue. Confirm the full part number; do not infer a value for a blank cell.

Rejection, function and length

Rejection (dB)	Filter Type	Length (mm)
50@3.4395 50@3.3855	Bandpass	200
70@5.72, 6.72	Transmit Reject	165
24@3.35 24@4.25 75@3.25 75@4.35-14.0	Bandpass	210
60@3.35 50@4.25	Bandpass	120
61@3.6 60@3.6-3.7 55@4.45-4.8	Bandpass	120
25@3.57, 4.25 60@3.525, 4.3 70@3.45, 4.35	Bandpass	200
40@18.0-21.2 30@45.4-45.8 30@68.1-68.7	Lowpass	50
45@30-31 30@45.4-45.8 30@68.1-68.7	Lowpass	50
60@32.5 60@37.5 66@50.0	Bandpass	80
20@41-46 40@40.5-46.5	Bandpass	60
40@76.5	Bandpass	60

Keep every rejection value with its printed frequency condition. The source rows are presented separately without merging model records.

Published finish entries

Flange Type	Inside Finish	Body Finish	Material
Cover/Grooved	Iridite per MIL-C-5541	Anticorrosion Black Painted	Al/Cu
Cover/Grooved	Iridite per MIL-C-5541	Anticorrosion Black Painted	Al/Cu
Cover/Grooved	Iridite per MIL-C-5541	Anticorrosion Black Painted	Al/Cu
Cover/Grooved	Iridite per MIL-C-5541	Anticorrosion Black Painted	Al/Cu

The source contains four repeated finish rows and eleven electrical rows. No extra row-to-model relationship has been inferred.

Ordering information: DH – 120 WBPF 10.8T11.5 P M A

Code	Published meaning
DH	Dolph Microwave
120	WR75
WBPF	Bandpass
WLPF	Lowpass
WHPF	Highpass
WTRF	Transmit Reject
WRRF	Receive Reject
10.8T11.5	Pass Band Freq. Range 10.8-11.5 GHz
P	Flange Cover
M	Flange Grooved
A	Material Al

Product-family reference from the original page

The entries below are retained as published. Where they differ from the model-specific catalogue, confirm the selected configuration using the notes above.

Specification	Details
Frequency Bands	C, X, Ku, Ka
VSWR	1.2:1
Material	Aluminum (Al), Copper (Cu)

Drawings and original documents

Waveguide Filter

Download PDF

View original pages (1)

OMT (Orthogonal Mode Transducer)

Dolph — Mon, 29 Jan 2024 07:30:00 +0000

An orthomode transducer (OMT) separates two orthogonal polarization paths from a common waveguide port, or combines them in the reverse direction. Specify the polarization basis of the complete feed: circular-polarization operation may require a polarizer or an integrated assembly.^[1]

8 model rowsX / C / Ku / DBS / Ka

AlMaterial in the listed model rows

TBD common portFinal drawing required

View specifications Drawings & documents Download datasheet PDF

Feed interfaces and materials

Model selection

Some abbreviated model names repeat with different bands. Keep the full frequency requirement with the part number.

Material and power

The family lists aluminum/copper; all eight model rows specify Al. No numeric high-power rating is given; include CW and peak requirements.

Polarization and ports

Isolation and cross-polarization are separate ratings. Confirm the common-port drawing and any accompanying polarizer for the required feed-system polarization.

Original specification sheet · Open full size

Specifications and configuration details

OMT electrical model data

Model	Frequency range (GHz)	VSWR	Insertion loss (dB)	Cross-polarization (dB)
DH-OMT-X-RT…	9.3-9.8	1.15	0.2	35
DH-OMT-C-RT…	5.8-7.2	1.2	0.1	35
DH-OMT-C-RT…	3.4-6.725	1.2	0.1	35
DH-OMT-Ku-RT…	10.7-14.5	1.25	0.1	30
DH-OMT-Ku-RT…	10.7-14.8	1.25	0.1	30
DH-OMT-DBS-RT…	15.0-22.0	1.4	0.5	35
DH-OMT-DBS-RT…	17.7-19.7	1.25	0.15	35
DH-OMT-Ka-RT…	17.7-31.0	1.25	0.15	35

Isolation and waveguide interfaces

Isolation (dB)	Waveguide Type	Common port	Material
35	WR90	TBD	Al
35	WR137	TBD	Al
35	WR137/WR229	TBD	Al
35	WR75	TBD	Al
35	WR75	TBD	Al
45	WR51	TBD	Al
40	WR42	TBD	Al
35	WR42/WR28	TBD	Al

The eight rows follow the source order. All common-port entries remain TBD.

Ordering information: DH – OMT – Ext.Ku – RT – X – 02

Code	Published meaning
DH	Dolph Microwave
OMT	Orthogonal Mode Transducer
Ext. Ku	Extend Ku-band
RT	Transceiver
X	Cross Pol.
2	Second Generation

Configuration limits for model selection

The model rows above take precedence over the catalogue’s general feature list. The original PDF is retained for reference; its generic 1.2:1 VSWR statement is not a rating for all eight configurations.

Specification	Details
Frequency Bands	X, C, Ku, DBS and Ka configurations; select the exact frequency range from the model rows.
Polarization	Specify the two orthogonal polarization paths and any required polarizer. Coaxial describes an interface or geometry, not a polarization state.
VSWR	Listed model values range from 1.15:1 to 1.4:1. Confirm acceptance limits across the selected operating band.
Material	All eight listed models specify aluminum (Al). Confirm any copper (Cu) construction separately.
Isolation	35, 40 or 45 dB in the listed model rows; these values are separate from cross-polarization performance.
Power Handling	No numeric rating is stated in this sheet. Specify CW and peak power, duty cycle and operating conditions for review.
Customization	Available for standard and special needs

Drawings and original documents

OMT (Orthogonal Mode Transducer)

Download PDF

View original pages (1)

Waveguide Diplexer

Dolph — Mon, 29 Jan 2024 07:29:33 +0000

What We Match Before Quotation

Rx and Tx frequency ranges

State the two bands separately. The published datasheet includes C-, X-, Ku-, DBS- and Ka-band configurations with different receive and transmit ranges.

Polarization and rejection

Published configurations include linear, circular and co-polarized arrangements. Tell us the required polarization, cross-polarization and rejection or isolation target.

Power and interfaces

Include handling power, Tx/Rx interface, common-port interface and any flange requirement. The model sheet contains WR and SMA interface examples.

Mechanical layout

Send the mating drawing, available envelope or a simple sketch when the standard layout does not fit. Custom waveguide assemblies can be reviewed with the diplexer interfaces together.

Send Your RF Requirement
Custom Waveguide Assemblies

Published Product Specifications

Specification	Details
Frequency Bands	C, X, Ku, Ka, or others
VSWR	Excellent
Insertion Loss	Low
Isolation	High
Material	Aluminum (Al), Copper (Cu)
Structure	Compact
Customization	Available for specific needs

Three-port RF path

The published diplexer structure uses separate receiving and transmitting ports with a common port connected to the antenna or antenna feed.

Model-specific values require confirmation

The published page confirms C, X, Ku and Ka-band options with low insertion loss, high isolation and aluminum or copper construction. Confirm numeric RF limits, polarization, interfaces and power against the selected datasheet and quotation.

Ordering code is defined in the sheet

Use the published ordering information together with your final frequency, polarization and interface requirement when requesting a quote.

Official Product Datasheet

Use the official PDF as an engineering reference and confirm the exact model, RF limits and interfaces in the quotation. The verified product-page specifications above remain the authoritative summary in this page body.

Download Product Datasheet
Match My Requirement to a Model
Review Waveguide Flange Standards

Use the Diplexer as Part of the Feed Chain

For antenna feed work, the diplexer can be reviewed together with the parts connected before and after it. This helps keep the band plan, polarization and interfaces consistent across the assembly.

Need polarization separation? Review the OMT Orthogonal Mode Transducer.

Need a defined passband or rejection mask? Review the Waveguide Filter.

Need the horn, OMT, filter and diplexer as one assembly? Review RF Networks and Antenna Feeder Networks.

Working on a multi-band layout? See how Dolph integrates multiple frequency bands in an antenna feed network.

Review the Complete RF Path
Custom Antenna Feed Systems

From Drawing to Tested Hardware

Manufacturing in-house

Dolph lists CNC machining, turning, waveguide forming and bending, anodising and passivation, abrasive machining, diamond grinding, electrolytic and electroless plating, soldering and brazing of Copper, Copper alloys and Aluminum, and electroforming.

Custom interface work

For non-standard layouts, Dolph can work from detailed drawings or simple sketches and review custom bends, waveguide sections and end flanges with the required RF interfaces.

Inspection requirement can be defined in the RFQ

If your procurement package needs specific RF limits, inspection evidence or test reports, include the required method, frequency points and acceptance limits before order release.

Manufacturing Capabilities
Measurement and Test Support

Published Test Resources

RF measurement to 100 GHzVector and scalar measurement systems are listed up to 100 GHz.

Antenna anechoic chambersAvailable when the supplied feed or assembly needs antenna-related verification.

High-power resourcesHigh-power transmitters are listed among the company measurement services.

Environmental test capabilityPublished services include temperature or altitude, salt fog and humidity testing.

Specify Required Test Evidence
View Test Capabilities

Supplier Information You Can Verify

Quality Documentation

Request current quality-system documentation for supplier qualification.

Founded in 2001

The company states that the former state-owned 806 Factory was its predecessor.

One-Year Warranty

Products are warranted against defective material and workmanship for one year from delivery, subject to Dolph Microwave warranty terms.

Compliance Process Capability

Request the applicable process-compliance documentation for the quoted configuration.

About Dolph Microwave

Send These Details for a Useful Quote

Rx frequency range

Tx frequency range

Polarization

VSWR and insertion-loss target

Rejection or isolation target

Handling power

Tx/Rx interface

Common-port interface

Mechanical drawing or space limit

Quantity and required timing

Request a Technical Quote
See an S/X Dual-Band Feed Example

Technical References

C-Band Antenna Feeds and RF Networks

C-band feed configurations using filters, diplexers and other RF components.

Ku-Band Tx/Rx OMT and Filter Assembly

A published Ku-band Tx/Rx assembly with frequency, VSWR, cross-polarization and isolation data.

Multi-Band Antenna Feed Integration

How filters, OMTs and waveguide diplexers are combined in a multi-band feed layout.

Downloads

Waveguide Diplexer Specification Sheet PDF

Flange Type Designations Information PDF

The post Waveguide Diplexer appeared first on DOLPH MICROWAVE.

Waveguide Phase Shifter & Septum Circular Polarizer

Dolph — Mon, 29 Jan 2024 07:29:05 +0000

Product Data at a Glance

WR-28 to WR-284

Size range

0-360°

Continuous phase shift

Manual / Motorized

Operation modes

Standard / Custom

Build options

The published phase-shifter range and the septum circular-polarizer configurations serve different RF functions. Confirm the required function, band, waveguide interface, control method, polarization and power before selecting a model.

Key Features

Versatile Size RangeAvailable in sizes from WR-28 to WR-284, catering to a wide array of waveguide configurations.

Flexible Operation ModesOffers both manual and motorized adjustments, ensuring optimal adaptability to different operational requirements.

Wide BandwidthSupports a broad frequency range, enhancing compatibility with various microwave applications.

Continuous Phase ShiftProvides a 0-360° continuous phase adjustment, allowing for precise signal phase alignment.

High Power HandlingEngineered to withstand high power levels, ensuring reliability under demanding conditions.

Optimal VSWR and Insertion LossFeatures excellent Voltage Standing Wave Ratio (VSWR) and minimal insertion loss, maintaining signal integrity.

Customization AvailabilityBoth standard and customized configurations can be tailored to meet specific system requirements.

Technical Specifications

Size RangeFrom WR-28 to WR-284

Operation ModesManual, Motorized

BandwidthWide

Phase Shift0-360° (Continuous)

Power HandlingHigh

VSWROptimal

Insertion LossMinimal

Application Areas

Satellite Communications: Facilitates accurate signal polarization and phase control for reliable satellite link establishment and maintenance.

Radar Systems: Enhances radar signal precision through meticulous phase adjustment and polarization optimization.

Wireless Networks: Improves signal clarity and reach in wireless communication systems by fine-tuning signal phase and polarization.

Telecommunications: Ensures superior signal quality in telecom infrastructure through precise phase shifting and polarization control.

Research and Development: Supports advanced experimental setups in microwave physics and engineering with accurate signal manipulation capabilities.

Send the interface data before choosing a model

Include Rx/Tx frequency ranges, RHCP/LHCP requirement, power, flange, manual or motorized control, mechanical limits and quantity.

Request Model Review

Published Phase-Shifter Range

Sizes: from WR-28 to WR-284

Description: manual, motorized

Wide bandwidth

Phase shift: 0-360° (Continuous)

A waveguide phase shifter changes the phase of the transmitted microwave signal. The current product page publishes the size range, operating modes and continuous phase-shift range above; numeric power, VSWR and insertion-loss limits must be confirmed for the selected model.

Separate the Required RF Function

This product page covers two related but distinct functions. The phase-shifter specifications must not be treated as polarizer performance, and polarizer configurations must not be used as universal phase-shifter model data.

Waveguide Phase Shifter

Published page data: WR-28 to WR-284, manual or motorized operation, wide bandwidth and 0-360° continuous phase shift.

Confirm model-specific frequency, power handling, VSWR, insertion loss, control arrangement, flange and mechanical limits in the quotation.

Septum Circular Polarizer

Specify the required Rx and Tx bands, RHCP/LHCP function, axial-ratio requirement, handling power, interfaces and common-port arrangement.

Confirm all model values and material information against the official datasheet and the approved interface drawing.

Download Official Datasheet

Ordering Information

DH – WSPT 7.2T8.4 P M A

DHDolph Microwave

WSPTPhase Shifter, Septum Polarizer

7.2T8.4Operation Freq. Range 7.2-8.4 GHz

PFlange Cover

MFlange Grooved

AMaterial Al

Confirm the mating interface

Use the Waveguide Flange Standard EIA & IEC reference when the mating flange is not fixed by an existing drawing.

For bolt pattern, sealing groove and EIA/IEC fit checks, see the Waveguide Flange Size Guide.

Confirm Flange and Drawing

How We Handle a Custom Build

Requirement reviewSend the bands, power, flange, polarization, control method, size limits and any existing drawing.

Electrical and mechanical matchDolph reviews the published models first, then prepares a custom configuration when the standard interface does not fit.

In-house fabricationDolph lists CNC machining, waveguide forming and bending, brazing, plating, anodising, passivation and assembly among its manufacturing capabilities.

RF verification before shipmentDolph states that parts are checked in its test lab and microwave chamber before shipment.

For a wider system review, see Custom Antenna Feed Systems or the Manufacturing capability page.

Complete the Feed Chain When Needed

Use the phase shifter and septum polarizer as one section of the feed network, then match the surrounding parts to the same frequency, polarization and interface requirements.

OMT (Orthogonal Mode Transducer)

Use when the feed assembly must separate or combine orthogonal polarization modes.

Waveguide Diplexer

Use when transmit and receive bands must be routed through one feed arrangement.

Microwave Feedhorn

Use when the polarization section must connect into a complete antenna feed assembly.

Rectangular to Circular Waveguide Transition

Use when the surrounding waveguide geometry requires a rectangular-to-circular interface change.

Factory and Quality Information

Since 2001Dolph states that it has manufactured microwave parts and antenna feed systems in Xi’an since 2001.

One-Year WarrantyPublished warranty coverage is one year from delivery for defective material and workmanship, subject to warranty terms.

RF Test SupportThe factory lists RF test equipment, a testing laboratory and microwave chamber capability.

Compliance ProcessesAnodising and passivation are listed as Compliance-compliant manufacturing processes.

Request the current quality-system and compliance documents required for your supplier file or order approval.

Review Company Information

Send the requirement that controls the build

Send Rx/Tx bands, polarization, handling power, waveguide or flange interface, control preference, mechanical envelope, quantity and any existing drawing.

Email Your Specification
Open Contact Page

PDF Downloads

Waveguide Phase Shifter, Septum (Circular) Polarizer Datasheet

Flange Types Designations Information

The post Waveguide Phase Shifter & Septum Circular Polarizer appeared first on DOLPH MICROWAVE.

RF Networks

Dolph — Mon, 29 Jan 2024 07:28:35 +0000

Custom RF Feed Networks for Multi-Band Antenna Systems

Dolph Microwave designs and manufactures RF feed network assemblies that combine the required microwave components into one matched signal path. Published configurations include multi-port and multi-band designs with single or dual polarization.

Standard and customized builds are available. Send your Rx/Tx frequency ranges, polarization, power level, interfaces and mechanical limits for engineering review.

Multi-port

Published option

Multi-band

Published option

Single / Dual

Polarization

One Feed Network, Matched to Your RF Chain

We can build the feed network around the functions your antenna system needs, using Dolph microwave components such as a microwave feedhorn, OMT, waveguide filter, diplexer and other waveguide sections.

Frequency planMatch the required Rx and Tx bands.

PolarizationSingle, dual, linear or circular as required by the build.

InterfacesWaveguide, flange and connector requirements are reviewed together.

Mechanical layoutThe assembly is configured to your available space and mounting limits.

Send Your RF Requirements
See Complete Antenna Feeder Networks

Send the Inputs That Define the Build

Exact Rx and Tx frequency ranges

Polarization and port arrangement

Dish size, type and available envelope

Transmit power level

Waveguide, flange and connector interfaces

Quantity and required delivery timing

Request an Engineering Review

Published RF Network Configuration Data

The following values reproduce the model data shown in Dolph Microwave’s RF Networks catalog. Blank fields indicate values not stated in the published table. Final performance and interfaces should be confirmed for the selected configuration.

Published bandsS, X, C, C/Ku, DBS, Ku/Ka and Ka examples

VSWR valuesPublished examples range from 1.25 to 1.4

Published materialAl

Power entries100 W, 500 W and 1000 W in the catalog table

Model	Rx Freq. (GHz)	Tx Freq. (GHz)	VSWR	Pol. Type
DH-Feed-S-RO…	2.1-2.5		1.25	RHCP/LHCP
DH-Feed-X-4-RT…	7.25-7.75	7.9-8.4	1.4	RHCP/LHCP
DH-Feed-X-4-RT…	7.25-7.75	7.9-8.4	1.4	HLP/VLP
DH-Feed-SX-4-RT…	7.8-8.4 2.2-2.3	2.025-2.11	1.25	RHCP/LHCP
DH-Feed-C-4-RT…	3.4-4.2	5.85-6.725	1.25	HLP/VLP
DH-Feed-C-4-RT…	3.4-4.2	5.85-6.725	1.25	RHCP/LHCP
DH-Feed-CKu-4-RO…	3.4-4.2 10.7-12.75		1.35	RHCP/LHCP HLP/VLP
DH-Feed-CKu-4-RO…	3.4-4.2 10.7-12.75		1.35	HLP/VLP
DH-Feed-DBS-4-RT…	10.7-12.75	17.3-18.4	1.3	RHCP/LHCP
DH-Feed-Kuka-4-RT…	12.25-12.75 19.60-21.20	14.0-14.5 29.4-31.0	1.35	HLP/VLP
DH-Feed-Ka-4-RT…	17.7-21.2	27.5-31.0	1.25	HLP/VLP
DH-Feed-Ka-4-RT…	17.7-21.2	27.5-31.0	1.25	RHCP/LHCP
DH-Feed-Ka-4-RTTrk…	17.7-21.2	27.5-31.0 Trk18.3-20.2	1.35	RHCP/LHCP

IL (dB)	Axial Ratio (dB)	Cross-pol (dB)	Isolation Tx/Rx	Freq. Isolation	Handling Power(W)	Interface Tx/Rx	Com.Port	Material
	1.5	20			100	N-K		Al
	0.75	25	85		1000	WR112	Φ54	Al
		35	85		1000	WR112	Φ54	Al
	0.8	20	15	20	100	WR112/N-K		Al
0.3		30	85		1000	WR229/137	Φ57.8	Al
0.4	0.5	30	85		1000	WR229/137	Φ57.8	Al
0.35/0.55	0.5	30		30	500	WR229/75	Φ62	Al
0.25		35	30	30	500	WR229/75	Φ62	Al
0.3	0.5	30	85		500	WR75/62	Φ18.18	Al
0.5	1.5	30	85	30	500	WR75/42/28		Al
0.7		35	85		500	WR42/28	Φ11.5	Al
0.7	0.5	30	85		500	WR42/28	Φ11.5	Al
1.2	0.5	30	85		500	WR42/28/42	Φ11.5	Al

Published Ordering Code

The catalog gives the following ordering example for a Ku-band transceiver feed assembly.

DH – Feed-Ku-4-RT LP P A

Request a Model Match

DHDolph Microwave
FeedOMT+TRF Combiner
KuStandard Ku-band
44 Port
RTTransceiver
LPPol. Type Linear H/V
PFlange Cover
MFlange Grooved
AMaterial Al

Build the Feed Chain Around the Required Function

Polarization Split or Combination

When your network requires separate polarization paths, integrate an OMT. For circular polarization or phase-control requirements, review Dolph’s phase shifter and septum polarizer options.

Discuss the Polarization Layout

Band Selection and Tx/Rx Separation

Use a waveguide filter when the feed chain needs band selection. Use a waveguide diplexer when transmit and receive paths must be separated or combined in the network.

Read the Multi-Band Feed Network Article

Complete Feed Systems for More Complex Builds

If you need the horn, OMT, filters, diplexers, polarizers and other waveguide parts supplied as a complete feed system, see Dolph’s Antenna Feeder Networks or the Custom Antenna Feed Systems capability page.

See C-Band Feed and RF Network Examples

Need a Configuration Outside the Published Examples?

Send the frequency plan, polarization, power, interface, dish data, mechanical envelope, quantity and timing. Dolph can review a standard or customized RF network configuration.

Ask for a Technical Proposal

Manufacturing and Test Support in Xi’an

Dolph was founded in 2001 and manufactures microwave components and feed systems in China. Manufacturing capabilities listed by Dolph include CNC machining, turning, waveguide forming and bending, soldering and brazing of copper, copper alloys and aluminium, plating and electroforming.

Dolph’s manufacturing information also lists a testing laboratory, microwave chamber and coordinate measuring equipment. Its Quality Manual and Quality Procedure use ISO 9001:2015, and manufacturing capabilities include anodising and passivation to RoHS requirements.

Dolph states a one-year warranty for defects in material and workmanship under the published warranty terms.

View Manufacturing Capabilities
About Dolph Microwave

Useful Technical References

How to Integrate Multiple Frequency Bands in an Antenna Feed Network

C-Band Antenna Feeds and RF Networks

Custom Antenna Feed Systems

Technical Documents

Use the flange reference for interface designations and the RF Networks catalog for the published model table and ordering information.

Flange Types Designations PDF
RF Networks Product PDF

The post RF Networks appeared first on DOLPH MICROWAVE.

Antenna Feeder Networks

Dolph — Mon, 29 Jan 2024 07:28:05 +0000

Build the Feed Around Your RF Plan and Reflector

We can supply the complete feed assembly or only the functions you need. The frequency plan, polarization, waveguide interfaces, available envelope and reflector geometry are reviewed together before the build is released.

Feed designs

Single-band, dual-band and triple-band

Polarization

Single or dual, linear or circular as required

Feed types

Prime focus, offset, ring focus and Cassegrain

Project scope

Standard configurations or customized assemblies

Send Your Frequency Plan

Components We Integrate Into the Feed Chain

The feed network can be built from Dolph microwave components as one matched mechanical and RF assembly.

Microwave Feedhorn

C, X, Ku and Ka-band feedhorn configurations are published, with linear/circular, dual or co-polarization options on the feedhorn product range.

OMT (Orthogonal Mode Transducer)

Used to separate or combine orthogonal polarization paths inside the feed network.

Waveguide Filter

Added where the RF path requires controlled band selection or rejection.

Waveguide Diplexer

Used to separate or combine transmit and receive paths in the feed chain.

Phase Shifter & Septum Polarizer

For phase and polarization functions inside circular or rectangular waveguide feed sections.

Waveguide Rotary Joint

Supports RF transmission through rotating interfaces where the antenna architecture requires movement.

Request a Feed Network Review View Custom Feed Systems

Single-Band to Multi-Band Feed Configurations

Dolph offers single-band, dual-band and triple-band antenna feed designs. Published feed-network work includes combined C/Ku, S/X, DBS, Ku/Ka and Ka examples.

Diverse Feed System DesignsSingle-band, dual and triple-band antenna feeds.

High-Quality ComponentsFilters, OMTs, polarizers, horns, diplexers and rotary joints.

Versatile Integration CapabilitiesWaveguide components and sub-systems; prime-focus, offset, ring-focus and Cassegrain feeds; spectrum-monitoring solutions.

Optimal PerformanceParabolic reflector antenna feed elements are designed around the selected system requirements.

Wide Application RangeSatellite communication, earth observation, deep-space missions and radio astronomy.

Reflector Supplier QualificationFor a project supplied with a partner reflector, request the named manufacturer, current quality-system certificate and allocation of assembly and acceptance-test responsibilities.

Comprehensive Solution OfferingQuick-deploy antennas, parabolic prime-focus reflector antennas, earth stations and Trifold Transportable Antennas are included in the published portfolio.

Technical Specifications

Feed System DesignSingle-band, Dual, Triple-band

Key ComponentsFilters, OMTs, Polarizers, Horns, Diplexers

Integration CapabilitiesWaveguide Components, Various Feed Types

Application FocusSatellite Comm., Earth Observation, etc.

CollaborationProject-specific reflector supplier; current qualification documents on request

Product RangeQuick-Deploy Antennas, Earth Stations

Published S/X Dual-Band Feed Example

This published S/X configuration is a project reference, not a universal rating. Confirm whether the Tx/Rx labels refer to the ground or spacecraft equipment, and identify the measured receive chain for the listed noise figure before using it in a link budget.

Published drawing retains the dimensional views and bill of materials shown by Dolph Microwave.

ModelDH-Dualband-Feed-S/Tx&Rx-X/Rx 01
F/D0.33
X-band7.8-8.4GHz
X-band PolarizationRHCP/LHCP
Flange interfaceWR112/FBP84, 1-port, connected with LNA system
VSWR＜1.25
Axial ratio＜0.8dB
Rx Noise factor＜0.5dB
S-bandTx 2025-2110MHz; Rx 2200-2300MHz
S-band PolarizationRHCP&LHCP
Interface typeN-type, 2-port
Power capacity100W peak

Ask About This S/X Configuration Read the Published S/X Case

X- Band reception in RHCP

X- Band septum polarizer for low noise performance and low axial ratio

S- Band transmission in RHCP

X- Band Loopback test injection port for testing the complete X Band reception chain

Two Band coaxial waveguide feed, both bands on axis

Optional X- Band waveguide filter for radar rejection

Feed is controlled over the Orbital Data Bus (ODB)

Integrated low phase noise X- Band block downconverter to L- Band IF output (Optional)

Heavy-duty aluminum enclosure, powder coated and assembled with stainless steel fasteners to eliminate external corrosion

Pressurized feed with temperature and humidity sensors

Published Ordering Code

The catalog gives the following ordering example for a Ku-band transceiver feed assembly.

DH – Feed-Ku-4-RT LP P A

The catalog key also lists M as the grooved-flange designation.

DHDolph Microwave
FeedOMT+TRF Combiner
KuStandard Ku-band
44 Port
RTTransceiver
LPPol. Type Linear H/V
PFlange Cover
MFlange Grooved
AMaterial Al

Feed Network Configuration Checks

A passive feed network routes signals by frequency and polarization between the RF equipment and antenna feed. Link distance and building penetration depend on the complete radio system and propagation path; they are not standalone feed-network specifications.

Multi port or multi band

Polarization: Single, dual

Defined RF signal paths

Band-specific loss limits

Port-to-port isolation

Project-specific lead time

Send the Inputs That Define Your Feed Network

Send the available RF and mechanical inputs. If you only have a drawing, part number or partial specification, our engineering team can start from that.

Rx and Tx frequency rangesExact operating ranges and bandwidth.

Polarization and portsLinear or circular, sense/orientation and port arrangement.

Dish size and geometryReflector type, diameter, f/D or antenna model and available envelope.

Transmit powerPower level the network must handle.

InterfacesWaveguide sizes, flange types, connectors and mounting limits.

Quantity and timingQuantity, documentation needs and delivery schedule.

Send Drawing or Specification Custom Waveguide Assemblies

Check WR sizes and frequency bands
Check EIA and IEC flange matching
Review multi-band feed integration

Manufacturing and Verification

Dolph Microwave’s published manufacturing scope includes machining, forming, joining, finishing and RF/mechanical verification. Define the drawing revision, inspection points and RF acceptance tests for the selected feed assembly.

CNC workshop

Quality inspection

Microwave test chamber

CNC machining

Lathes,Turning facilities

Waveguide forming and bending

Anodising and Passivation (Compliance)

Abrasive Machining

Diamond Grinding

Plating – Electrolytic and Electroless

Soldering and Brazing of Copper, Copper Alloys and Aluminium

Electroforming

Send Your Drawing See Manufacturing

Application Focus

Dolph’s published application scope for antenna feeder networks includes the areas below.

Satellite Communication

Establishing and maintaining satellite communication links for data, voice and video transmission.

Earth Observation

Monitoring and collecting environmental data for climate research, natural-disaster assessment and resource management.

Deep Space Missions

Communication with spacecraft exploring the solar system and beyond.

Radio Astronomy

Radio-wavelength observation within research antenna systems.

Earth Station Antenna

Use this range when the reflector antenna and feeder network need to be reviewed in the same project scope.

LEO / MEO Tracking Antenna

Use this range when the application requires a tracking antenna rather than a feed-only assembly.

Quality, Compliance and Warranty

Request current quality-system, compliance and warranty documents for supplier qualification.

Quality Documentation

Request current quality-system documentation.

Compliance Documentation

Request the applicable process-compliance documentation.

One-Year Warranty

Published product information describes a one-year warranty against defective material and workmanship. Confirm the start date, coverage and return conditions in the quotation and applicable warranty terms.

Choose the Scope That Matches Your Project

For a complete feed-only project beyond the published configurations, use our Custom Antenna Feed Systems capability. If you need a discrete function, review the Microwave Feedhorn, OMT, Waveguide Filter or Waveguide Diplexer.

Send the frequency plan, polarization, reflector type, interfaces, power level and quantity you have. We will use those inputs to review the right feed-network scope with you.

Request a Quote Custom Antenna Feed Systems

The post Antenna Feeder Networks appeared first on DOLPH MICROWAVE.