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The differences between directional coupler and BI-directional coupler

Time : 2021-07-10 Hits : 11

The directional coupler has three accessible ports with high directivity and isolation, the fourth port is internally terminated to provide maximum directivity. While the BI-directional coupler has four accessible ports, and the customers can use all accessible ports. The directional coupler has some advantages, for example, its performance can be optimized for the forward paths,The directivity of the directional coupler is strongly affected by the impedance match provided by the termination at the isolated port. The disadvantages of the directional coupler is that the coupling is only available on the forward path. The bi-directional coupler has a symmetric design,allowing forward and reverse signals to be sampled simultaneously. While the advantages of the bi-directional is that It has forward and reverse coupling, and its Input and output ports are interchangeable. The bi-directional also has some disadvantages, e.g, the directivity of the coupler depends on how well the isolated port is terminated. These are about The differences between directional coupler and BI-directional coupler.

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