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Design of a Dual-Band Square-Waveguide Iris Polarizer  

Hwang Soon-Mi (KETI)
Ko Han-Woong (Dept. of Radio Eng., Graduate School Chungbuk National University)
Park Dong-Hee (School of Electrical, Electronics and Information Eng., Chungju University)
Yun So-Hyeun (ETRI)
Uhm Man-Seok (ETRI)
Ahn Bierng-Chearl (Dept. of Radio Eng., Graduate School Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.2, 2005 , pp. 113-119 More about this Journal
Abstract
In this paper, we present methods for designing a square-waveguide iris polarizer operating at dual frequency bands. Methods are presented fur determining the number of ires, iris thickness, iris height and spacing between ires so that the input reflection is low and the axial-ratio bandwidth is optimized at two frequency bands. As an example of the application of the proposed method, a polarizer operating at 21 GHz and 31 GHz bands is designed, fabricated and tested. The fabricated polarizer shows a reflection coefficient less than -35 dB and an axial ratio less than 0.3 dB at $20.8\~21.2\;GHz$ and $30.6\~31.0\;GHz$.
Keywords
Waveguide Polarizer; Iris Polarizer; Dual-Band Polarizer;
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