Communication Technical Services

HFH4-1 – 4 x 1kW HF Broad Band Hybrid Combiner

The HFH4-1 is a 4 x 1 kW broad band hybrid designed to combine four unequal frequencies within the range of 2 – 40 MHz.

The unit is built to full military standards and suitable for frequency hopping and similar systems. It is emphasised that the HFH4-1 is not capable of combining co-phased transmitters and a 6 dB splitting loss is applicable to each signal path.

  • ‘N’ connectors only available
  • Load port must be terminated in 500 watt 50 ohm unbalanced loads
  • Units available for outdoor unprotected operation

HFH4 – 1 Dimensional Drawing


HFH4-1 Technical Specification

Frequency: 2 – 40 MHz
Impedance: 50 ohms
Input Power: 4 x 1 kW average
Balancing Loads: 6 x 500 Watt 50 ohms
Splitter Loss: 6 dB
Phase: 0º +/ – ” 5º
Insertion loss: 0.5 dB (matched loads)
VSWR: <1.2 : 1 max
Load VSWR: 3 : 1 max
Input Sockets: ‘N’ Sockets
Output Sockets: ‘N’ Sockets
Load Sockets : ‘N’ Sockets
Isolation: >30 dB (matched loads)
Cooling: Solid encapsulation natural convection
Temperature: -40°C to +55°
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