Communication Technical Services

HFM2-5 – 2 x 5 kW HF Transmitter Multicouplers

Transmitter multicouplers utilising low loss filter networks enable multiple transmitters to work into a common antenna. Computer aided design techniques provide optimum performance from passive LC circuits which allows transmitters to work at 15% frequency separation.

System losses are low, typically less than 0.3 dB and rejection of the adjacent transmitter greater than 30 dB.

HFM2-5 Dimensional Drawing

Frequency: 0.1 – 32MHz
Impedance: 50 ohms
VSWR: <1.2: 1 (matched loads)
Insertion Loss: <0.3dB (matched load)
Isolation: >30dB (matched load)
Load VSWR: 3:1 max
Weight: 150kg approx
Notch Width: 15%, 20%, 40% of cross over frequency
Cross Cover Frequency: Notch centre to be specified between 3-18MHz (lower notch centres available)
Environment: Outdoor unprotected -40°C to +55°C natural convection Silicone oil cooled natural convection
Connectors: 7/8″, 1 5/8″ EIA, LC
Power: 2 input channels each 20 kW average (40kW peak) 1 output channel 40 kW average (80kW peak)

 

Typical Response

Typical Response

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