Broadband High Power Low Insertion Loss Single Directional Broadwall Couplers

The waveguide directional coupler consists of a main waveguide and a negative waveguide. Coupling is carried out through the coupling holes on the common wall of the main waveguide and the auxiliary waveguide. According to the number and shape of coupling holes, waveguide directional couplers can be divided into various structural forms such as single hole directional couplers, porous directional couplers, cross hole directional couplers matched with double T and waveguide crack bridges.
A directional coupler is a four port network that includes an input terminal, an output terminal, a coupling terminal, and an isolation terminal. Directional couplers are passive and reversible networks. In theory, directional couplers are lossless circuits, and their ports should be matched. Directional couplers can be composed of coaxial, waveguide, microstrip, and stripline circuits.