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Abstract
This paper describes a method to design an antenna to focus millimeter-wave beam generated by a gyrotron. The antenna, which has been proposed by the authors, consists of a stair-cut circular waveguide and two cylindrical reflectors; one is elliptic and the other is parabolic. Its principle is based on the geometrical optics though slightly modified to consider the diffraction effect. Results of low-power experiments agree well with the design on beam direction, beam width and the position of the focal point. At 35.5 GHz using TE(01) mode, a focused beam with half-power thickness of 13 mm x 10 mm was obtained. This type of antennas find applications to millimeter-wave scattering measurement in fusion plasma research and high- energy-density source for material heating.
Journal
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- Memoirs of the Faculty of Engineering, Okayama University
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Memoirs of the Faculty of Engineering, Okayama University 26 (2), 77-92, 1992-03-28
Faculty of Engineering, Okayama University
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Details 詳細情報について
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- CRID
- 1390853649478298624
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- NII Article ID
- 120002307321
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- NII Book ID
- AA10699856
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- ISSN
- 04750071
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- DOI
- 10.18926/15439
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- Text Lang
- en
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- Data Source
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- JaLC
- IRDB
- CiNii Articles