High Power Termination
High Power Termination devices are essential components in RF and microwave systems, designed to safely absorb high levels of power without reflecting it back into the system. They are critical for protecting sensitive equipment from damage, ensuring stable performance across various applications, including telecommunications, radar, and testing environments.
Dolph Microwave high power waveguide terminations absorb RF and microwave energy at the end of a rectangular waveguide path, helping reduce reflected power and protect transmitters, amplifiers, test equipment and other connected components. The published air-cooled range covers 1.13 to 112 GHz, WR650 to WR10, with model-dependent VSWR from 1.03:1 to 1.15:1 and continuous-wave ratings from 10 W to 4000 W. Aluminum or copper construction, cover or grooved flange configurations, IP65 protection, corrosion treatment and flat-black painted finishes are available according to model.
Product range at a glance
Frequency & WR Size
Match the complete operating band to the corresponding standard rectangular waveguide size.
Continuous Power
Provide continuous power, anticipated peak power and duty profile.
Cooling Conditions
Air-cooled models require sufficient ventilation and heat-release clearance.
Flange Interface
Confirm cover or grooved construction and the exact EIA/IEC designation.
Air-cooled model matrix
| Model | Freq. Range (GHz) | WG Size | VSWR | Avg. Power CW (W) | Cooling Method | Cover Flange | Grooved Flange | Ingress Protection | Material | Finish |
|---|---|---|---|---|---|---|---|---|---|---|
| DH-14WHPL… | 1.13–1.73 | WR650 | 1.03:1 | 1000–4000 | Air Cooled | UDR14 | PDR14 | IP65 | Al/Cu | Chromate/Painted |
| DH-18WHPL… | 1.45–2.2 | WR510 | 1.03:1 | 1000–3000 | Air Cooled | UDR18 | PDR18 | IP65 | Al/Cu | Chromate/Painted |
| DH-22WHPL… | 1.72–2.61 | WR430 | 1.03:1 | 100–3000 | Air Cooled | UDR22 | PDR22 | IP65 | Al/Cu | Chromate/Painted |
| DH-26WHPL… | 2.17–3.3 | WR340 | 1.03:1 | 100–3000 | Air Cooled | UDR26 | PDR26 | IP65 | Al/Cu | Chromate/Painted |
| DH-32WHPL… | 2.6–3.95 | WR284 | 1.03:1 | 100–3000 | Air Cooled | UDR32 | PDR32 | IP65 | Al/Cu | Chromate/Painted |
| DH-40WHPL… | 3.22–4.9 | WR229 | 1.03:1 | 100–3000 | Air Cooled | UDR40 | PDR40 | IP65 | Al/Cu | Chromate/Painted |
| DH-48WHPL… | 3.94–5.99 | WR187 | 1.03:1 | 100–3000 | Air Cooled | UDR48 | PDR348 | IP65 | Al/Cu | Chromate/Painted |
| DH-58WHPL… | 4.64–7.05 | WR159 | 1.03:1 | 100–3000 | Air Cooled | UDR58 | PDR58 | IP65 | Al/Cu | Chromate/Painted |
| DH-70WHPL… | 5.38–8.17 | WR137 | 1.03:1 | 100–3000 | Air Cooled | UDR70 | PDR70 | IP65 | Al/Cu | Chromate/Painted |
| DH-84WHPL… | 6.57–9.99 | WR112 | 1.03:1 | 100–3000 | Air Cooled | UDR84/UBR84 | PDR84/PBR84 | IP65 | Al/Cu | Chromate/Painted |
| DH-100WHPL… | 8.2–12.5 | WR90 | 1.03:1 | 100–3000 | Air Cooled | UDR100/UBR100 | PDR100/PBR100 | IP65 | Al/Cu | Chromate/Painted |
| DH-120WHPL… | 9.84–15 | WR75 | 1.03:1 | 100–3000 | Air Cooled | UBR120 | PBR120 | IP65 | Al/Cu | Chromate/Painted |
| DH-140WHPL… | 11.9–18 | WR62 | 1.03:1 | 100–3000 | Air Cooled | UBR140 | PBR140 | IP65 | Al/Cu | Chromate/Painted |
| DH-180WHPL… | 14.5–22 | WR51 | 1.03:1 | 100–2500 | Air Cooled | UBR180 | PBR180 | IP65 | Al/Cu | Chromate/Painted |
| DH-220WHPL… | 17.6–26.7 | WR42 | 1.03:1 | 100–2500 | Air Cooled | UBR220 | PBR220 | IP65 | Al/Cu | Chromate/Painted |
| DH-260WHPL… | 21.7–33 | WR34 | 1.03:1 | 100–2500 | Air Cooled | UBR260 | PBR260 | IP65 | Al/Cu | Chromate/Painted |
| DH-320WHPL… | 26.3–40 | WR28 | 1.03:1 | 100–2500 | Air Cooled | UBR320 | PBR320 | IP65 | Al/Cu | Chromate/Painted |
| DH-400WHPL… | 32.9–50.1 | WR22 | 1.15:1 | 100–1500 | Air Cooled | FUGP400 | UG-383U/M | IP65 | Al/Cu | Chromate/Painted |
| DH-500WHPL… | 39.2–59.6 | WR19 | 1.15:1 | 100–1500 | Air Cooled | FUGP500 | UG-383U/M | IP65 | Al/Cu | Chromate/Painted |
| DH-620WHPL… | 49.8–75.8 | WR15 | 1.15:1 | 100–1500 | Air Cooled | FUGP620 | UG-385U/M | IP65 | Al/Cu | Chromate/Painted |
| DH-740WHPL… | 60.5–91.9 | WR12 | 1.15:1 | 10–100 | Air Cooled | FUGP740 | UG-387U/M | IP65 | Al/Cu | Chromate/Painted |
| DH-900WHPL… | 73.8–112 | WR10 | 1.15:1 | 10–100 | Air Cooled | FUGP900 | UG-387U/M | IP65 | Al/Cu | Chromate/Painted |
Materials
Published material options are aluminum or copper, selected according to thermal, mass, conductivity and mechanical requirements.
Surface Protection
Published models include Surtec/corrosion protection treatment and flat-black paint. Flanges are unplated, polished and Surtec treated.
Flange Options
Cover and grooved flange designations are listed by model. Verify mating compatibility before ordering.
Capabilities available for component support
RF Measurement
Vector and scalar RF measurement capability up to 100 GHz, high-power transmitter resources and waveguide calibration service are listed on the company support page.
Environmental Testing
Published capabilities include temperature/altitude, salt fog/humidity, EMI and EMS testing.
Precision Manufacturing
Capabilities include CNC milling and turning, waveguide forming and bending, brazing, soldering, plating, passivation and assembly.
Technical reading for specification work
Waveguide Power Handling: CW, Peak Power, Breakdown and Cooling
Review practical power limits and thermal considerations.Waveguide Frequency Bands Chart: WR Sizes and Cutoff Frequency
Compare operating ranges before selecting the load size.Waveguide Flange Size Guide: EIA, IEC and Gasket Fit
Verify mating flange and gasket compatibility.Compatible products for the waveguide path
High Power Water-Cooled Loads
For substantially higher average-power dissipation.
Waveguide Termination
Review the broader termination product family.
High-Power Waveguide Coaxial Adapter
Transition between waveguide and coaxial interfaces.
Straight Waveguide Sections
Connect the load into a rigid transmission path.
Waveguide Flange Standard EIA & IEC
Check flange families and designation conventions.
Low Power Min (Short) Termination
A compact alternative for lower-power applications.
