Hybrid Coupler
When two ODUs share one antenna, the ODUs must be connected to an RF signal coupler/ splitter (hybrid coupler). Then, the hybrid coupler is connected to the antenna. 

Pulsar has developed a very large number of customized directional couplers. Towards this end, Pulsar utilizes various technologies such as lumped elements, air line, short couplers and stripline circuits.

For low power surface mount requirements with frequencies up to 2000 MHz, lumped elements are used since the losses are good and the dimensions are much smaller than either air line, short couplers and stripline circuits. Two package sizes are available, one of them 0.38 X 0.50 X 0.20 inches and the second 0.25 X 0.31 X 0.20 inches. Coupling values are between 6.5 and 30 dB and power handling is generally 1-3 watts.
All of the surface mount directional couplers are available also in connectorized packages with options of SMA, Type N, BNC and in some cases, F connectors. With the ability to utilize heat sinking techniques, power handling for selected units is now increased to 10-25 watts for some units.
In order to reach higher power handling capability in the connectorized units in the frequency range up to 2000 MHz, it is now necessary to use large ferrites for the lower frequencies and short coupler designs for the higher frequencies. The ferrite approach yields power levels up to 2500 watts with coupling values between 30 and 50 dB whereas the short coupler handles power levels up to 600 watts with the same values.



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