Moment method analysis of rectangular waveguide Tjunctions with the side arm having arbitrary cross sections
Abstract
This paper describes the calculation of the scattering parameters of a Tjunction of rectangular waveguide having an arbitrary crosssection by the method of moments. An equivalence theorem is first utilized to divide the Tjunction into two separate parts. The magnetic fields in these regions can be represented by the integral form of the equivalent magnetic current over the surface of the junction end of the side arm and the dyadic Green's functions. An integral equation for the magnetic current is set up by applying the continuous condition of tangential components of magnetic field. The integral equation is transformed into a set of linear algebraic equations by the method of moments. The approximate solution to the equivalent magnetic current can be obtained by solving this matrix equation. At last the scattering parameters of the Tjunction can be derived. The scattering characteristics of the dominant mode excited in two different Tjunctions are computed. The results agree with available values in the literature.
 Publication:

Nanjing Aeronautical Institute Journal
 Pub Date:
 December 1991
 Bibcode:
 1991NaAIJ..23...65S
 Keywords:

 Electromagnetic Scattering;
 Green'S Functions;
 Method Of Moments;
 Rectangular Waveguides;
 Cross Sections;
 Magnetic Field Configurations;
 Matrix Methods;
 Microwave Frequencies;
 Communications and Radar