Mode Matching Analysis of an E-Plane 90 degrees Bend With a Square Step in Parallel-Plate Waveguide

Francesco Foglia Manzillo (1) , Ronan Sauleau (1) , Nicolas Capet (2) , Mauro Ettorre (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique
2 CNES - Centre National d'Études Spatiales [Toulouse]

We present a numerical model for the analysis of an E-plane right-angle bend in parallel-plate waveguide (PPW), with a single square step for matching purposes. This design can achieve wideband matching and can be implemented using hollow waveguides as well as multilayer printed circuit boards. An even- and odd-mode analysis is performed exploiting the symmetry of the structure. Two auxiliary problems are defined considering the bisecting plane of the bend as a perfect electric conductor or a perfect magnetic conductor, respectively. They are solved using a mode matching method. The mathematical derivations are discussed in detail. The proposed procedure can be embedded in efficient tools for the analysis of complex PPW systems, such as feed networks for antenna arrays.

Keywords: Continuous transverse stub (CTS) antennas; corporate feed network; mode matching; right-angle bend; waveguide components

Domains: Computer Science [cs]; Networking and Internet Architecture [cs.NI]; Engineering Sciences [physics]; Electronics

Francesco Foglia Manzillo, Ronan Sauleau, Nicolas Capet, Mauro Ettorre. Mode Matching Analysis of an E-Plane 90 degrees Bend With a Square Step in Parallel-Plate Waveguide. IEEE Antennas and Wireless Propagation Letters, 2017, 16, pp.2187-2190. ⟨10.1109/LAWP.2017.2704428⟩. ⟨hal-01622071⟩