Operation of Two‐port On/Off and Off/On Planar Switches Using the Mutual Energy–Finite Element Method

A complete characterization of a one‐port homogeneous circuit requires the solutions of one‐port networks only. This chapter employs the mutual energy technique in conjunction with the finite element method to tackle an
n
‐port problem. It includes the design of On‐Off and Off‐On two‐port stripline switches using a commercial solver. The development of the open‐ or short‐circuit parameters of a two‐port planar circuit begins with the conservation of power immittance definitions. The admittance or impedance matrix of a circuit may be calculated once the electric fields due to the two one‐port circuits defined by ports
i
and
j
are obtained. The mutual energy method may be used in conjunction with the finite element method to evaluate the frequency response of any
n
‐port planar circuit. A two‐port On/Off stripline junction may also be realized by replacing one of the two ferrite pucks by a metal plug.