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On single-mode transmission of variable ferrite polarizers in circular waveguide

✍ Scribed by Wenquan Che; Edward K. N. Yung

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
276 KB
Volume
43
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

High‐order modes are a problem in the design of many ferrite devices. The characteristic equation for the modes in a ferrite variable polarizer, implemented in a dielectric‐filled circular waveguide, is obtained using the mode‐matching method. The conditions to guarantee single‐mode (TE~11~) operation are also determined. It is shown that when the ferrite thickness has been chosen as t = 0.0377λ~0~, the valid range of the dielectric thickness should be 0.01λ~0~ < d < 0.0146λ~0~ for single‐mode operation. It is shown that the dielectric ring filling can improve the figure of the merit and help to realize the single‐mode transmission in the device. Experimental results from a prototype polarizer are provided as verification of the analysis presented here. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 348–353, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20466

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