Title :
An iris polarizer in coaxial waveguide
Author :
Figlia, G. ; Forigo, D. ; Mercurio, F. ; Savini, D.
Author_Institution :
Centro Studi e Lab. Telecomunicazioni, Torino, Italy
Abstract :
An accurate and reliable electromagnetic model has been developed for the design of a circular polarizer in a coaxial waveguide. The component consists of a coaxial waveguide loaded by irises with inductive and capacitive behaviors for the incident field. The design is based on the method of field expansion into eigenmodes and takes into account the effects of higher order mode interactions and of multiple reflections among the polarizer elements. The measured and computed performances of a very compact five-element feasibility breadboard are presented. An axial ratio better than 1.02, insertion losses lower than 0.1 dB, and return losses better than 27 dB have been obtained over a 13.5% frequency band.<>
Keywords :
circular waveguides; waveguide components; axial ratio; circular polarizer; coaxial waveguide; eigenmodes; electromagnetic model; field expansion method; higher order mode interactions; insertion losses; iris polarizer; multiple reflections; return losses; Coaxial components; Electromagnetic modeling; Electromagnetic wave polarization; Electromagnetic waveguides; Iris; Loaded waveguides; Performance evaluation; Reflection; Waveguide components; Waveguide discontinuities;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1989. AP-S. Digest
Conference_Location :
San Jose, CA, USA
DOI :
10.1109/APS.1989.134856
