Directional Coupler Series 80-520MHz

Series WMDCXX-80-520M-Y-A5 is an improved directional coupler series to cover 80-520MHz in a range of coupling values from 3 through 30 dB.

Intended as an eventual replacement for the WMDCXX-0.13-0.52-N series, which will continue to be supported.


  • Thicker stripline structure allows for wider traces, lower insertion loss and higher forward power handling.
  • Internal 40W termination for improved reverse power handling.
  • O-Rings in connectors and epoxy-sealed cover, designed for IP65 environment.  Additional weatherproofing options available.
  • The low frequency has been extended down to 80-MHz for FM broadcasting applications with approximate 3-dB roll-off.

Product Specifications

General Parameters:
Type: Directional
Frequency: 80 to 520 MHz
Coupling: 3 to 30 dB
Coupling Tolerance: -0/+3 to ±1.50 dB
Coupling Flatness: ±0.7 to ±1.0 dB
Insertion Loss: 0.3 to 4.5 dB
Average Forward Power: 40 to 200 W
Average Reverse Power: 25 to 200 W
Main Line VSWR: 1.15:1, 1.35 :1
Impedance: 50 Ohms
Mechanical Specification:
Operating Temperature: -40 to +65 °C
Storage Temperature: -55 to +125 °C
Relative Humidity: 0.85
Weight: 1.2 lb
Operating Environment: Designed for IP65. (Connector O-Ring Material: Silicone). Cover seal: Epoxy.
Enclosure Material: Aluminum Alloys 6061 and 5052
Enclosure Finish: RoHS Clear Chemical Conversion Film per MIL-DTL-5541 Class 3
Solder Alloy: Sn 96.5, Ag 3.0, Cu 0.5