The Two‐port On/Off H‐plane Waveguide Turnstile Gyromagnetic Switch

The two‐port on/off gyromagnetic switch described in this chapter is a tee junction consisting of an E‐plane Faraday rotation section at the junction of two H‐plane rectangular waveguides. The two‐port switch supports, in keeping with all microwave circuits, a multiplicity of higher‐order solutions. The chapter includes one example which displays a passband in the demagnetized state and a stopband in the magnetized state. The H‐plane tee junction is also known as a series tee junction. A subset of the Dicke junction is the two‐port geometry obtained by closing the side port. The adjustment of the switch is facilitated by decomposing a single generator setting at one port into in‐phase and out‐of‐phase eigenvectors settings at both ports. The nature of the even and odd reflection coefficients of the demagnetized and magnetized H‐plane switch may be deduced by bisecting its equivalent circuit by electric and magnetic walls.