Waveguide Rotary Joints
Waveguide rotary joints are mechanical devices that allow for the rotation of waveguide sections while maintaining a continuous transmission path for microwave signals. They are crucial in systems requiring rotational movement, such as radar antennas and satellite communication dishes, enabling them to rotate without interrupting the signal flow. These components are designed for high precision and reliability, ensuring minimal signal loss and distortion during rotation.
Double-Ridged Waveguide Rotary Joints
Dolph Microwave supplies double-ridged waveguide rotary joints for rotating RF interfaces from 0.84 to 40.0 GHz. The published model matrix includes 39 I-, L- and U-shape entries with cover or grooved flanges, IP65 ingress protection, Al/Cu material options and Chromate/Painted finish. Send the operating band, WRD size, both flange interfaces, power condition, rotation requirement and mechanical envelope for model matching or a custom review.
Match the Published Range to Your Assembly
Start with the frequency range and WRD interface, then confirm geometry, flange type, power and environmental requirements. Single- or dual-channel configurations and pressure, leakage and torque requirements can be reviewed when the standard matrix does not cover the complete mechanical need.
Have the Band, Flanges and Installation Envelope?
Send the required frequency range, WRD size, joint style, both flange interfaces, average and peak power, rotation speed and available space. We can check the nearest published model before quotation.
Technical Specifications
Waveguide Size
WRD84 to WRD180
Channel
Single or Dual
Type
L, I, U
Material
Aluminum (Al), Copper (Cu)
Flange Type
Cover, Grooved
Rotary Speed
High
Customization
Pressure, Leakage, Torque Adjustments
What to Send for Model Matching
Operating band: start and stop frequency, plus any narrower working band.
WRD and ports: waveguide size and the exact cover or grooved flange designation on both sides.
Geometry and channel: I-, L- or U-shape, single or dual channel.
Power condition: average or CW power, peak power and duty condition where applicable.
Mechanical data: rotation speed, installation envelope, mounting constraints, pressure, leakage and torque requirements.
Acceptance limits: required VSWR, insertion loss and any project-specific inspection or test documentation.
Published Model Matrix
Match frequency, waveguide size, VSWR, insertion loss, average power, joint style, flange designation, ingress protection, material and finish before drawing review. The published model table and downloadable family sheet contain different ratings for some families; use the released quotation, drawing or model-specific acceptance document for the order.
| MODEL | FREQ RANGE (GHz) | WG SIZE | VSWR | IL(dB) (Max) | AVG. POWER (W) | JOINT STYLE | COVER FLANGE | GROOVED FLANGE | INGRESS PROTECTION | MATERIAL | FINISH | DATASHEET |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DH-840DRWRJI… | 0.84-2.0 | WRD840 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD840U24 | FMWRD840U24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-840DRWRJL… | 0.84-2.0 | WRD840 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD840U24 | FMWRD840U24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-840DRWRJU… | 0.84-2.0 | WRD840 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD840U24 | FMWRD840U24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-150DRWRJI… | 1.5-3.6 | WRD150 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD150D24 | FMWRD150D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-150DRWRJL… | 1.5-3.6 | WRD150 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD150D24 | FMWRD150D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-150DRWRJU… | 1.5-3.6 | WRD150 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD150D24 | FMWRD150D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-200DRWRJI… | 2.0-4.8 | WRD200 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD200D24 | FMWRD200D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-200DRWRJL… | 2.0-4.8 | WRD200 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD200D24 | FMWRD200D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-200DRWRJU… | 2.0-4.8 | WRD200 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD200D24 | FMWRD200D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-250DRWRJI… | 2.6-7.8 | WRD250 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD250D30 | FMWRD250D30 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-250DRWRJL… | 2.6-7.8 | WRD250 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD250D30 | FMWRD250D30 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-250DRWRJU… | 2.6-7.8 | WRD250 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD250D30 | FMWRD250D30 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-350DRWRJI… | 3.5-8.2 | WRD350 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD350D24 | FMWRD350D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-350DRWRJL… | 3.5-8.2 | WRD350 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD350D24 | FMWRD350D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-350DRWRJU… | 3.5-8.2 | WRD350 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD350D24 | FMWRD350D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-475DRWRJI… | 4.75-11.0 | WRD475 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD475D24 | FMWRD475D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-475DRWRJL… | 4.75-11.0 | WRD475 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD475D24 | FMWRD475D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-475DRWRJU… | 4.75-11.0 | WRD475 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD475D24 | FMWRD475D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-500DRWRJI… | 5.0-18.0 | WRD500 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD500D36 | FMWRD500D36 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-500DRWRJL… | 5.0-18.0 | WRD500 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD500D36 | FMWRD500D36 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-500DRWRJU… | 5.0-18.0 | WRD500 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD500D36 | FMWRD500D36 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-580DRWRJI… | 5.8-16.0 | WRD580 | 1.4:1 | 0.5 | 400 | I-Shape | FPWRD580D28 | FMWRD580D28 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-580DRWRJL… | 5.8-16.0 | WRD580 | 1.4:1 | 0.5 | 400 | L-Shape | FPWRD580D28 | FMWRD580D28 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-580DRWRJU… | 5.8-16.0 | WRD580 | 1.4:1 | 0.5 | 400 | U-Shape | FPWRD580D28 | FMWRD580D28 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-650DRWRJI… | 6.5-18.0 | WRD650 | 1.4:1 | 0.45 | 400 | I-Shape | FPWRD650D28 | FMWRD650D28 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-650DRWRJL… | 6.5-18.0 | WRD650 | 1.4:1 | 0.45 | 400 | L-Shape | FPWRD650D28 | FMWRD650D28 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-650DRWRJU… | 6.5-18.0 | WRD650 | 1.4:1 | 0.45 | 400 | U-Shape | FPWRD650D28 | FMWRD650D28 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-700DRWRJI… | 7.0-18.5 | WRD700 | 1.4:1 | 0.45 | 300 | I-Shape | FPWRD700D26 | FMWRD700D26 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-700DRWRJL… | 7.0-18.5 | WRD700 | 1.4:1 | 0.45 | 300 | L-Shape | FPWRD700D26 | FMWRD700D26 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-700DRWRJU… | 7.0-18.5 | WRD700 | 1.4:1 | 0.45 | 300 | U-Shape | FPWRD700D26 | FMWRD700D26 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-750DRWRJI… | 7.5-18.0 | WRD750 | 1.4:1 | 0.45 | 300 | I-Shape | FPWRD750D24 | FMWRD750D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-750DRWRJL… | 7.5-18.0 | WRD750 | 1.4:1 | 0.45 | 300 | L-Shape | FPWRD750D24 | FMWRD750D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-750DRWRJU… | 7.5-18.0 | WRD750 | 1.4:1 | 0.45 | 300 | U-Shape | FPWRD750D24 | FMWRD750D24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-110DRWRJI… | 11.0-26.5 | WRD110 | 1.5:1 | 0.75 | 250 | I-Shape | FPWRD110C24 | FMWRD110C24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-110DRWRJL… | 11.0-26.5 | WRD110 | 1.5:1 | 0.75 | 250 | L-Shape | FPWRD110C24 | FMWRD110C24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-110DRWRJU… | 11.0-26.5 | WRD110 | 1.5:1 | 0.75 | 250 | U-Shape | FPWRD110C24 | FMWRD110C24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-180DRWRJI… | 18.0-40.0 | WRD180 | 1.5:1 | 0.75 | 250 | I-Shape | FPWRD180C24 | FMWRD180C24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-180DRWRJL… | 18.0-40.0 | WRD180 | 1.5:1 | 0.75 | 250 | L-Shape | FPWRD180C24 | FMWRD180C24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
| DH-180DRWRJU… | 18.0-40.0 | WRD180 | 1.5:1 | 0.75 | 250 | U-Shape | FPWRD180C24 | FMWRD180C24 | IP65 | Al/Cu | Chromate/Painted | PDF STEP |
Need Pressure, Leakage, Torque or a Non-Standard Envelope?
Send the installation drawing with the RF limits and the mechanical requirement. Standard and customized mechanical configurations are available for review.
Mechanical Layout and Interface
I-Shape
Two in-line arms, both collinear with the axis of rotation.
L-Shape
One arm is perpendicular to the axis of rotation.
U-Shape
Both arms are perpendicular to the axis of rotation.
Cover and Grooved Flanges
Use the model-specific FPWRD cover and FMWRD grooved designations in the matrix and cross-check the flange dimensions before release.
Part Number Guide
Waveguide Size: WRD840
Waveguide Type: Waveguide Rotating Joint
Joint Style: I, L, U-Shape
Flange Type: Rectangular Flat
Flange Type: Rectangular Grooved
Material: Aluminium, Cu
Power Rating: 400 W CW.
Published finish note: Surtec/corrosion-protection treatment with flat-black paint; flanges are unplated, polished and Surtec-treated. Other finishes and paint colours are available on request.
Family PDF Reference
The downloadable family sheet publishes additional lifetime, pressure, finish and material data. Keep these values with the model matrix during technical review, and use the released quotation, drawing or model-specific acceptance document for the final order values.
| Model | WR Type | Frequency (GHz) | VSWR Max. | IL Max. (dB) | Ave. Power (W) | Lifetimes | Pressure (PSIG) |
|---|---|---|---|---|---|---|---|
| DH-84DRWRJ… | WRD84 | 0.84-2.0 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-150DRWRJ… | WRD150 | 1.5-3.6 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-200DRWRJ… | WRD200 | 2.0-4.8 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-250DRWRJ… | WRD250 | 2.6-7.8 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-350DRWRJ… | WRD350 | 3.5-8.2 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-475DRWRJ… | WRD475 | 4.75-11.0 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-500DRWRJ… | WRD500 | 5.0-18.0 | 1.5 | 0.5 | 500 | 5 × 10⁶ | 15 |
| DH-580DRWRJ… | WRD580 | 5.8-16.0 | 1.5 | 0.5 | 650 | 5 × 10⁶ | 15 |
| DH-650DRWRJ… | WRD650 | 6.5-18.0 | 1.5 | 0.5 | 280 | 5 × 10⁶ | 15 |
| DH-750DRWRJ… | WRD750 | 7.5-18.0 | 1.5 | 0.5 | 280 | 5 × 10⁶ | 15 |
| DH-700DRWRJ… | WRD700 | 7.0-18.0 | 1.5 | 0.5 | 280 | 5 × 10⁶ | 15 |
| DH-110DRWRJ… | WRD110 | 11.0-26.5 | 1.5 | 0.5 | 100 | 5 × 10⁶ | 15 |
| DH-180DRWRJ… | WRD180 | 18.0-40.0 | 1.5 | 0.5 | 100 | 5 × 10⁶ | 15 |
Ordering Information Shown in the Family Sheet
Dolph Microwave
WRD650
Waveguide Rotary Joints
Type-L
Type-I
Type-U
Flange Cover
Flange Grooved
Material Al
Ingress Protection
IP65
Shape Type
I / L / U
Flange Type
Cover/Grooved
Inside Finish
Iridite per MIL-C-5541
Body Finish
Anticorrosion Black Painted
Material
Al/Brass
The family sheet also states high-power handling and high rotary speed, with optional pressure, leakage and torque requirements, L/I/U shapes, and standard or customized mechanical configurations.
Related Components and Engineering References
If your interface is standard WR instead of WRD
Use the Waveguide Rotary Joint range for standard rectangular waveguide interfaces.
If the published power range is not enough
Review the High Power Waveguide Rotating Joint family and provide both CW and peak power requirements.
If the rotating joint is part of a routed WRD assembly
Combine it with Double-Ridged Waveguide Bends or Double-Ridged Straights and Transitions to match the installation path.
If the line must be sealed or pressurized
Review the Double Ridge Waveguide Pressure Window and include pressure and leakage requirements in the RFQ.
If you need a waveguide interface change
Use the Double Ridge Waveguide Transition family or the broader Double Ridge Waveguide Components range.
Before setting power and frequency limits
Use Dolph’s engineering references for waveguide power handling and the waveguide frequency bands chart.
Manufacturing, Inspection and Support
Dolph Microwave has manufactured microwave components since 2001. Published capabilities include CNC milling and turning, waveguide forming and bending, soldering and brazing, anodising and passivation, electrolytic and electroless plating, abrasive machining, diamond grinding and electroforming. Published test capability includes RF vector and scalar measurement up to 100 GHz.
Manufacturing review from drawing or sketch
For a custom assembly, provide the interfaces, material, finish, RF limits and mechanical envelope so machining and assembly details can be reviewed before release.
Inspection requirements can be defined in the RFQ
Include any required dimensional records, RF test points, acceptance limits or environmental documentation before order release.
One-year product warranty
Dolph Microwave states a one-year warranty from delivery for defective material and workmanship, subject to the published warranty terms.
Factory capability details
Review the manufacturing capabilities when your procurement package requires process or inspection information.
Send the Data That Controls the Build
Frequency range, WRD size, I/L/U geometry, both flanges, channel count, CW and peak power, rotation speed, pressure or leakage requirement, torque limit, installation envelope, quantity and required inspection records.
