Monofilar archimedean spiral slot antennas

Kazuhide Hirose, Kazuo Nakayama, Hisamatsu Nakano

研究成果: Article査読

2 被引用数 (Scopus)

抄録

A monofilar Archimedean spiral is adopted as a circularly polarized slot radiator which is electromagnetically coupled to a feed line. Numerical analysis of the coupling between the slot and the feed line reveals that, when the slot arm length is properly chosen, a traveling-wave magnetic current is distributed along the slot, leading to the radiation of a circularly polarized wave. On the basis of this radiation mechanism, a spiral slot printed antenna fed by a triplate transmission line is experimentally designed to obtain a unidirectional radiation beam. It is found that an axial ratio of 0.6 dB is achieved, and that the spiral slot is matched to the transmission line with a VSWR of less than 1.5. An array antenna composed of 32 printed spiral slots is constructed, attaining a 5% bandwidth for a 3-dB axial ratio criterion. The formation of several tilted beams is also demonstrated.

本文言語English
ページ(範囲)415-426
ページ数12
ジャーナルElectromagnetics
14
3-4
DOI
出版ステータスPublished - 1994 1 1
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 放射線
  • 電子工学および電気工学

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