Design of a Variable Polarizer for High Power Microwave Applications

A high-power handling capacity variable polarizer which can achieve switching between linear polarization TE
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mode (LPT), right-hand circular polarization TE
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mode (RHCPT) and left-hand circular polarization TE
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mode (LHCPT) is presented in this paper. The variable polarizer is composed by a TM
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mode-LPT mode converter and a linearly-circularly (LP-CP) mode converter. By setting the relative rotation angles of the TM
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-LPT mode converter and the LP-CP mode converter, the polarization of the output TE
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mode can be changed. In this paper, two types of high-power microwave (HPM) variable polarizers are proposed. The two schemes have a coaxial input and output, the mode-conversion efficiency is higher than 99.5% and the power handling capacity reaches more than 10 GW at the frequency of 1.62 GHz, which can be used in HPM field.