Experimental study on a quasi-optical mode converter for transforming the whispering-gallery mode into a circularly polarized hollow radiation beam |
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| Authors: | Y Itoh Y Mitsunaka K Sakamoto and T Nagashima |
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| Institution: | (1) Toshiba R&D Center, Toshiba Corporation, 4-1 Ukishimacho, Kawasaki-ku, 210 Kawasaki, Japan;(2) Naka Fusion Research Establishment, Japan Atomic Energy Research Institute, 311-01 Naka, Ibaraki, Japan |
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| Abstract: | An experiment was carried out for transforming the 120 GHz-TE12.2 whispering-gallery mode (WGM) into a circularly polarized hollow radiation beam. A hollow beam was formed by reflecting the WGM, which was radiated from a 16 mm radius circular waveguide cut, with an annular mirror having suitable local normal vectors. The experimentally observed field intensity profiles of the reflected wave were in good agreement with calculated results. |
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