High Power Fixed Attenuator
Dolph-MW High Power Fixed Attenuators deliver precision signal control for 0.84-40 GHz systems, engineered with proprietary dual-ridge waveguide technology to handle up to 4 kW CW power (±0.1 dB accuracy) while maintaining VSWR ≤1.15:1. Featuring MIL-DTL-3922-compliant aluminum/copper construction and SurTec® anti-corrosion treatment, these attenuators ensure reliable performance in 5G mmWave, radar, and satellite communications.
Product Overview
Dolph-MW Double Ridged Waveguide Fixed Attenuators are engineered for high-power microwave systems requiring precise signal management across 0.84-40 GHz spectrum. Featuring proprietary dual-ridge waveguide architecture with optimized resistive film loading, these attenuators deliver up to 4 kW CW power handling (±0.1 dB accuracy) while maintaining VSWR ≤1.15:1. Our thermal management system combines aluminum/copper heatsinks with forced-air compatibility for stable operation in radar and 5G mmWave applications.
Key Features
• Ultra-Broadband Performance: 2:1 bandwidth ratio (e.g., 5.0-18.0 GHz in WRD500)
• Power Handling: 100W-4kW CW (model-dependent) with ±1.0 dB flatness
• Precision Attenuation: 3-30 dB standard range (±0.1 dB accuracy), 60 dB custom options
• Military-Grade Construction: Chromate-coated aluminum/copper bodies with SurTec® corrosion protection
• Thermal Management: Grooved flanges (MIL-DTL-3922 compliant) for efficient heat dissipation
Applications
◙ Radar Systems: Front-end power leveling for L-S band arrays
◙ 5G NR Infrastructure: mmWave signal conditioning (24-40 GHz)
◙ Satellite Communications: TWTA output stabilization
◙ Industrial RF Heating: 915/2450 MHz magnetron control
◙ EW Systems: Receiver protection up to 40 GHz
| MODEL | FREQ. RANGE (GHz) | WG SIZE | VSWR Max. | ATT. (dB) | FREQ. RESPONSE (dB) | AVG POWER CW (KW) | FLANGES TYPE | MATERIAL | FINISH | DATASHEET | ||
| COVER | GROOVED | |||||||||||
| DH-840DRWHPFA… | 0.84-2.0 | WRD840 | 1.15:1 | 10-60 | ±2.0 | 100-4000 | FPWRD840U24 | FMWRD840U24 | Al/Cu | Chromate/Painted | STEP | |
| DH-150DRWHPFA… | 1.5-3.6 | WRD150 | 1.15:1 | 10-60 | ±2.0 | 100-4000 | FPWRD150D24 | FMWRD150D24 | Al/Cu | Chromate/Painted | STEP | |
| DH-200DRWHPFA… | 2.0-4.8 | WRD200 | 1.15:1 | 10-60 | ±2.0 | 100-4000 | FPWRD200D24 | FMWRD200D24 | Al/Cu | Chromate/Painted | STEP | |
| DH-250DRWHPFA… | 2.6-7.8 | WRD250 | 1.15:1 | 10-60 | ±2.0 | 100-4000 | FPWRD250D30 | FMWRD250D30 | Al/Cu | Chromate/Painted | STEP | |
| DH-350DRWHPFA… | 3.5-8.2 | WRD350 | 1.15:1 | 10-60 | ±2.0 | 100-2000 | FPWRD350D24 | FMWRD350D24 | Al/Cu | Chromate/Painted | STEP | |
| DH-475DRWHPFA… | 4.75-11.0 | WRD475 | 1.15:1 | 10-60 | ±2.0 | 100-2000 | FPWRD475D24 | FMWRD475D24 | Al/Cu | Chromate/Painted | STEP | |
| DH-500DRWHPFA… | 5.0-18.0 | WRD500 | 1.15:1 | 10-60 | ±2.0 | 100-2000 | FPWRD500D36 | FMWRD500D36 | Al/Cu | Chromate/Painted | STEP | |
| DH-580DRWHPFA… | 5.8-16.0 | WRD580 | 1.15:1 | 10-60 | ±2.0 | 100-1500 | FPWRD580D28 | FMWRD580D28 | Al/Cu | Chromate/Painted | STEP | |
| DH-650DRWHPFA… | 6.5-18.0 | WRD650 | 1.15:1 | 10-60 | ±2.0 | 100-1500 | FPWRD650D28 | FMWRD650D28 | Al/Cu | Chromate/Painted | STEP | |
| DH-700DRWHPFA… | 7.0-18.5 | WRD700 | 1.15:1 | 10-60 | ±2.0 | 100-1500 | FPWRD700D26 | FMWRD700D26 | Al/Cu | Chromate/Painted | STEP | |
| DH-750DRWHPFA… | 7.5-18.0 | WRD750 | 1.15:1 | 10-60 | ±2.0 | 100-1000 | FPWRD750D24 | FMWRD750D24 | Al/Cu | Chromate/Painted | STEP | |
| DH-110DRWHPFA… | 11.0-26.5 | WRD110 | 1.15:1 | 10-60 | ±2.5 | 100-1000 | FPWRD110C24 | FMWRD110C24 | Al/Cu | Chromate/Painted | STEP | |
| DH-180DRWHPFA… | 18.0-40.0 | WRD180 | 1.15:1 | 10-60 | ±2.5 | 100-1000 | FPWRD180C24 | FMWRD180C24 | Al/Cu | Chromate/Painted | STEP | |
| Part Number Guide: DH-840DRWHPFA30PMA1000 "840DR"—Waveguide Size | WRD840 "WHPFA"—Waveguide Type | High Power Fixed Attenuator "30"— Attenuator Value | 30 dB "P"— Flange Type | Rectangular Flat "M"— Flange Type | Rectangular Grooved "A/C"— Material | Aluminium, Cu "1000"— Power Rating | 1000 W CW. |
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| Note: All Dolph-MW models include an surtec/corrosion protection treatment and are painted flat black. Flanges are unplated, polished and surtec. Other finishes and paint colors are available upon request. |
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