Full-wave analysis of antenna radiation in a rectangular waveguide with discontinuity. II. Probe mutual impedance

For pt. I see ibid. (p.459, 1994). This paper presents a full-wave analysis of probe mutual impedance between two antennas located in the different regions of an infinite rectangular waveguide that are separated by a homogeneous dielectric medium. In the region where the second current source is located, the electromagnetic fields due to the excitation of the first current source, are expressed in terms of the dyadic Green´s function. An integral relation between the mutual impedance and dyadic Green´s function is also given for general cases. To evaluate the solution for a specific case, the xˆxˆ-component of the Green dyad is obtained and the mutual probe impedance is then integrated analytically. Numerical computations are made finally to show the effects of the filled medium on the probe mutual impedance