Fast full-wave technique for CAD of polarizers based on double-ridge waveguide sections

ABSTRACT

Full-wave technique for a computer-aided design (CAD) of a wide class of square waveguide 90-degree polarizers based on double-ridge sections is presented. The proposed hybrid full-wave technique for analysis of polarizers is based on the Galerkin method with taking into account the edge condition, mode-matching technique and generalized scattering matrix method. The weighted Gegenbauer polynomials are used as the basis functions taking into account the field asymptotic at the edges when solving the eigenvalue problem for a ridge waveguide. Compact Ku-band waveguide 90-degree polarizers are designed for operation within frequency bands 12–12.5/14–14.5 GHz and 12.1–12.5/17.7–18.1 GHz. VSWR within two operational bands of polarizers is less than 1.04, differential phase shift is about 90° ± 0.5° and 90° ± 1.5°, respectively. The length of polarizers is reduced at a factor about 2 in comparison with the known corrugated square waveguide polarizers.

KEYWORDS:

• Waveguide polarizer
• polarization convertor
• double ridge waveguide
• Galerkin method
• Gegenbauer polynomials

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

Konstantin V. Kobrin

Konstantin V. Kobrin received the M.S. and PhD degrees from Rostov State University (since 2006 Southern Federal University), Russia, in 1991 and 2004, respectively, all in radiophysics. In 2014 he joined to Physics Department of Southern Federal University, where he is currently an Associate Professor. His research interests are in the areas of computer-aided design of antennas, antenna arrays, microwave and millimeter-wave components.

Mikhail B. Manuilov

Mikhail B. Manuilov received the M.S., PhD and Dr. Sc. degrees from Rostov State University (since 2006 Southern Federal University), Russia, in 1982, 1988 and 2007, respectively, all in radiophysics. From 1982 to 1985 he was a Research Engineer at Institute of Radiocommunications in Rostov-on-Don. In 1985 he joined to Physics Department of Southern Federal University, where he is currently a Full Professor and Head of Department. His research interests are in the areas of the computational electromagnetics and computer-aided design of antennas, phased antenna arrays, microwave and millimeter-wave components.