Dolph Microwave / Standard Waveguide
Waveguide Loop Coupler
Uni-directional and bi-directional loop couplers for sampling forward or reflected microwave power. Choose a published WR975–WR90 model or discuss a configuration matched to your waveguide, coupling level and flange interface.
The broader product-family statement is WR2300–WR10. The published model table below lists WR975–WR90 only; availability outside those listed sizes must be confirmed.
Configuration & construction
Specify the Coupler That Fits Your Line
Published directionality, waveguide, coaxial output, flange and finish options are retained below without treating optional configurations as standard for every model.
Single or dual sampling
WHC identifies a uni-directional loop coupler; WDHC identifies a bi-directional loop coupler. Confirm required forward/reverse orientation in the order.
Selectable coupling level
The web-page model table specifies 20–60 dB. The product-family overview states coupling up to 60 dB.
Flange & coaxial output
Model rows show N-Female output and cover/grooved flange codes. The family overview also lists choke flanges; confirm model-specific compatibility.
Aluminum or copper
Aluminum (Al) is specified for every published table row. Copper (Cu) appears as a product-family/material option available on request.
All 26 original model rows
Waveguide Loop Coupler Specifications
Each published model, frequency interval, 20% bandwidth, waveguide size, VSWR, coupling, directivity, output, flange code, material and PDF/STEP label is displayed individually. Scroll horizontally on narrow screens.
| MODEL | FREQ. RANGE(GHz) | OPERATING BANDWIDTH | WG SIZE | VSWR | COUPLING FWD./REV. (dB) | DIRECTIVITY (dB) | COUPLING OUTPUT | FLANGES TYPE COVER | FLANGES TYPE GROOVED | MATERIAL | DATASHEET |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DH-9WHC…Uni-directional | 0.76-1.15 | 20% | WR975 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR9 | PDR9 | Al | PDFSTEP |
| DH-9WDHC…Bi-directional | 0.76-1.15 | 20% | WR975 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR9 | PDR9 | Al | PDFSTEP |
| DH-12WHC…Uni-directional | 0.96-1.46 | 20% | WR770 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR12 | PDR12 | Al | PDFSTEP |
| DH-12WDHC…Bi-directional | 0.96-1.46 | 20% | WR770 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR12 | PDR12 | Al | PDFSTEP |
| DH-14WHC…Uni-directional | 1.13-1.73 | 20% | WR650 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR14 | PDR14 | Al | PDFSTEP |
| DH-14WDHC…Bi-directional | 1.13-1.73 | 20% | WR650 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR14 | PDR14 | Al | PDFSTEP |
| DH-18WHC…Uni-directional | 1.45-2.2 | 20% | WR510 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR18 | PDR18 | Al | PDFSTEP |
| DH-18WDHC…Bi-directional | 1.45-2.2 | 20% | WR510 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR18 | PDR18 | Al | PDFSTEP |
| DH-22WHC…Uni-directional | 1.72-2.61 | 20% | WR430 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR22 | PDR22 | Al | PDFSTEP |
| DH-22WDHC…Bi-directional | 1.72-2.61 | 20% | WR430 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR22 | PDR22 | Al | PDFSTEP |
| DH-26WHC…Uni-directional | 2.17-3.3 | 20% | WR340 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR26 | PDR26 | Al | PDFSTEP |
| DH-26WDHC…Bi-directional | 2.17-3.3 | 20% | WR340 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR26 | PDR26 | Al | PDFSTEP |
| DH-32WHC…Uni-directional | 2.6-3.95 | 20% | WR284 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR32 | PDR32 | Al | PDFSTEP |
| DH-32WDHC…Bi-directional | 2.6-3.95 | 20% | WR284 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR32 | PDR32 | Al | PDFSTEP |
| DH-40WHC…Uni-directional | 3.22-4.9 | 20% | WR229 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR40 | PDR40 | Al | PDFSTEP |
| DH-40WDHC…Bi-directional | 3.22-4.9 | 20% | WR229 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR40 | PDR40 | Al | PDFSTEP |
| DH-48WHC…Uni-directional | 3.94-5.99 | 20% | WR187 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR48 | PDR348 | Al | PDFSTEP |
| DH-48WDHC…Bi-directional | 3.94-5.99 | 20% | WR187 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR48 | PDR348 | Al | PDFSTEP |
| DH-58WHC…Uni-directional | 4.64-7.05 | 20% | WR159 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR58 | PDR58 | Al | PDFSTEP |
| DH-58WDHC…Bi-directional | 4.64-7.05 | 20% | WR159 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR58 | PDR58 | Al | PDFSTEP |
| DH-70WHC…Uni-directional | 5.38-8.17 | 20% | WR137 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR70 | PDR70 | Al | PDFSTEP |
| DH-70WDHC…Bi-directional | 5.38-8.17 | 20% | WR137 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR70 | PDR70 | Al | PDFSTEP |
| DH-84WHC…Uni-directional | 6.57-9.99 | 20% | WR112 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR84/UBR84 | PDR84/PBR84 | Al | PDFSTEP |
| DH-84WDHC…Bi-directional | 6.57-9.99 | 20% | WR112 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR84/UBR84 | PDR84/PBR84 | Al | PDFSTEP |
| DH-100WHC…Uni-directional | 8.2-12.5 | 20% | WR90 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR100/UBR100 | PDR100/PBR100 | Al | PDFSTEP |
| DH-100WDHC…Bi-directional | 8.2-12.5 | 20% | WR90 | 1.1:1 | 20-60 | 12-15 | N-Female | UDR100/UBR100 | PDR100/PBR100 | Al | PDFSTEP |
Directivity discrepancy in the original page: the family-level Key Features / Product Specifications Example state 20–25 dB, while every model row in this table states 12–15 dB. Both original values are preserved; request a model-specific datasheet or confirmed quotation before using either value as a design requirement.
Model-data transcription: the WR187 / DH-48WHC… and DH-48WDHC… grooved-flange code is published as PDR348 (not silently changed to PDR48). Verify that code against the mating flange before ordering.
Technical file labels: the source table shows “PDF” and “STEP” for each model, but their individual destination URLs could not be verified. Labels remain visible instead of being linked to an unrelated file; the verified range brochure appears below.
Original family-level specifications
Options Beyond the Listed Models
The original product overview describes the wider loop-coupler family. These family-level values are shown separately from the 26 model-specific rows above.
| Waveguide Size | WR2300 to WR10 |
|---|---|
| Coupling | Up to 60dB |
| Directivity | 20-25dB |
| Material | Aluminum (Al), Copper (Cu) |
| Flange Type | Cover, Grooved, Choke |
Surface protection & finish
All Dolph-MW models include a Surtec/corrosion protection treatment and are painted flat black. Flanges are unplated, polished and Surtec treated. Other finishes and paint colors are available upon request.
Original part-number example
Part Number Guide
Example: DH-100WHC30NKPMA. The meaning of each original code segment is retained below.
The source example contains both P and M flange codes. Confirm the two mating flange faces and the full approved part number before release.
Application areas stated on the product page
Where Coupled-Power Access Is Used
Relevant applications depend on the selected frequency band, required coupling, directionality and system qualification.
Telecommunications
Power sampling and monitoring in broadband and cellular network microwave equipment.
Radar Systems
Signal sampling in air-traffic-control and maritime-navigation radar systems.
Testing Equipment
Microwave signal access for laboratory measurement and testing equipment.
Satellite Communications
Monitoring points for satellite uplink and downlink equipment.
Electronic Warfare
Signal-sampling applications in defense-related electronic systems, subject to project requirements.
Customization & technical review
Define Your Required Configuration
Standard and customized configurations are available on request. Send the intended operating conditions to confirm the exact model, flange interface, coupling performance and finish before ordering.
- Selected model or waveguide size, plus minimum and maximum operating frequency
- Required coupling (dB), forward/reverse directionality and directivity
- Coaxial output type and gender; cover/grooved/choke flange and mating flange code
- Material (Al/Cu), finish and any mechanical drawing or fit constraints
- Main-line power and duty conditions for engineering review; no power rating is specified in the page model table
Manufacturer’s original range brochure: a separate catalog document; its model coverage and some listed performance figures differ from the web-page table. Use the model-specific approved document for procurement.
View manufacturer PDF
