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Waveguide Loads and Terminations

Name: Waveguide Loads and Terminations
Brand: DOLPH MICROWAVE
Price: 1 USD

Waveguide loads and terminations are critical components used in microwave systems to absorb reflected power and prevent signal reflection back into the system. They ensure the efficient operation of waveguide components by mimicking an infinite transmission line, thereby protecting sensitive equipment and enhancing overall system performance. Ideal for testing, measurement, and operational applications, these devices are key to maintaining signal integrity in various frequencies.

Double-Ridged Waveguide Loads & Terminations

Air- and water-cooled double-ridged waveguide loads for the listed 0.84–40.0 GHz bands, with current model-table CW ratings from 10 to 5000 W. Cover or grooved flanges, Al/Cu construction, IP65 listed models and project-specific finish options are available. Send the operating band, WRD size, CW/peak power and mating flange for model confirmation.

Dolph Microwave double-ridged waveguide loads and terminations with compact and finned load bodies

Match the Load to the Actual RF Conditions

The current product listing combines different WRD bands, power levels and cooling methods. Select from the model table by frequency, CW power, cooling and flange code rather than using one family value for every size.

0.84–40.0 GHz Listed model bands

10–5000 W CW Current high-power table

1.25:1 VSWR in the live model table

IP65 Listed ingress protection

Waveguide rangeThe family summary states WRD84 to WRD180. The live model table below is reproduced as published and labels its first row WRD840.

CoolingAir / water cooling is listed on the 10–5000 W rows. Lower maximum-power rows in the live table are listed as air cooled.

FlangeCover and grooved flange options are listed with model-specific FPWRD and FMWRD designations.

Material & finishThe live table lists Al/Cu and Chromate/Painted. Nickel, Tin, Silver and Gold Plating are stated as optional surface treatments.

Need a model checked before quotation? Send frequency range, WRD size, CW power, peak power or duty cycle, cooling preference and mating flange code.

Send RF Conditions

Available Load Configurations

Use the current model matrix for high-power selection. The technical PDF also lists low-power dummy-load models for customers who need a small matched termination instead of a finned high-power load.

Low-power dummy loads

The downloadable load PDF lists WL1.05 dummy loads at VSWR 1.05 max. Models shown for WRD84, WRD150, WRD200 and WRD700 are rated 5 W average; WRD110 and WRD180 entries are rated 0.5 W average.

Finned high-power loads

The current live table lists WHPL models from 10 W up to 5000 W CW depending on WRD size. Air or water cooling is shown on the highest-power rows.

If average and peak power are both important, use the model rating together with the actual duty cycle and cooling condition. See the waveguide power handling guide for the data to include in your RFQ.

Current Model Matrix

Model labels and specification values below are kept as published on the current product listing. Confirm the final part number, flange and power rating on the quotation or approved drawing before release.

Email a Model Check

MODEL	FREQ. RANGE (GHz)	WG SIZE	VSWR	AVG. POWER CW (W)	COOLING METHOD	COVER FLANGE	GROOVED FLANGE	INGRESS PROTECTION	MATERIAL	FINISH	DATASHEET
DH-840DRWHPL…	0.84-2.0	WRD840	1.25:1	10-5000	Air / Water Cooled	FPWRD840U24	FMWRD840U24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-150DRWHPL…	1.5-3.6	WRD150	1.25:1	10-5000	Air / Water Cooled	FPWRD150D24	FMWRD150D24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-200DRWHPL…	2.0-4.8	WRD200	1.25:1	10-5000	Air / Water Cooled	FPWRD200D24	FMWRD200D24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-250DRWHPL…	2.6-7.8	WRD250	1.25:1	10-5000	Air / Water Cooled	FPWRD250D30	FMWRD250D30	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-350DRWHPL…	3.5-8.2	WRD350	1.25:1	10-5000	Air / Water Cooled	FPWRD350D24	FMWRD350D24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-475DRWHPL…	4.75-11.0	WRD475	1.25:1	10-5000	Air / Water Cooled	FPWRD475D24	FMWRD475D24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-500DRWHPL…	5.0-18.0	WRD500	1.25:1	10-5000	Air / Water Cooled	FPWRD500D36	FMWRD500D36	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-580DRWHPL…	5.8-16.0	WRD580	1.25:1	10-1000	Air	FPWRD580D28	FMWRD580D28	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-650DRWHPL…	6.5-18.0	WRD650	1.25:1	10-1000	Air	FPWRD650D28	FMWRD650D28	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-700DRWHPL…	7.0-18.5	WRD700	1.25:1	10-1000	Air	FPWRD700D26	FMWRD700D26	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-750DRWHPL…	7.5-18.0	WRD750	1.25:1	10-1000	Air	FPWRD750D24	FMWRD750D24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-110DRWHPL…	11.0-26.5	WRD110	1.25:1	10-600	Air	FPWRD110C24	FMWRD110C24	IP65	Al/Cu	Chromate/Painted	PDF / STEP
DH-180DRWHPL…	18.0-40.0	WRD180	1.25:1	10-600	Air	FPWRD180C24	FMWRD180C24	IP65	Al/Cu	Chromate/Painted	PDF / STEP

Surface treatment optionsNickel, Tin, Silver and Gold Plating are stated as optional.

Standard finish noteAll Dolph-MW models include Surtec/corrosion protection treatment and are painted flat black. Flanges are unplated, polished and Surtec. Other finishes and paint colors are available upon request.

Flange referenceUse the model-specific FPWRD/FMWRD designation and the flange-dimensions PDF at the bottom for interface checking.

Part Number Guide

Example: DH-840DRWHPL100PMA

840DRWaveguide Size | WRD840

WHPLWaveguide Type | High Power Air-Cooled Loads

WWHPLWaveguide Type | High Power Water-Cooled Loads

100Power Rating | 100 W CW.

PFlange Type | Rectangular Flat

MFlange Type | Rectangular Grooved

A/CMaterial | Aluminium, Cu

Have an existing flange or replacement part? Send the mating flange code, old part number, PDF drawing, STEP file or measured interface.

Request Drawing Review Check Flange Selection

Send These Details for a Usable Quote

Frequency & WRD sizeFull operating band and the required WRD family.

CW & peak powerContinuous power, peak power and duty cycle for pulsed operation.

Cooling conditionAir or water cooling requirement and available installation space.

Flange interfaceCover or grooved flange, exact code and mating-part drawing when available.

Material & finishAl/Cu requirement plus any requested plating, paint or corrosion-protection condition.

Quantity & documentsQuantity, PDF/STEP needs and any required RF or dimensional records.

Built and Checked In-House

Dolph Microwave states that it has manufactured microwave components since 2001. Published factory capability includes CNC machining, turning, waveguide forming and bending, soldering and brazing, plating, anodising/passivation, abrasive machining, diamond grinding and electroforming.

RF vector and scalar measurement capability is published up to 100 GHz.

Published test resources include high-power transmitters, anechoic chambers and an environmental laboratory.

Anodising and passivation are listed as RoHS-compliant manufacturing processes.

Dolph states a one-year warranty from delivery against defective material and workmanship, subject to its warranty terms.

View Manufacturing Capability Review Warranty & Support

Dolph Microwave CNC machining for waveguide components

Dolph Microwave microwave anechoic chamber

Dolph Microwave coordinate measuring machine for dimensional inspection

Need a modified interface or a complete assembly? Dolph accepts drawings, STEP files, sketches and existing part numbers for custom waveguide work.

Custom Waveguide Assemblies