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 |
| 巻 | 14 |
| 号 | 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