抄録
A novel unbalanced feed system, which achieves quasi-antiphase excitation without a balun circuit, is proposed for a two-wire spiral antenna backed by a conducting plane reflector. An inner spiral-wire end is fed from a coaxial line and the other inner spiral-wire end is short-circuited to the reflector. The antenna is analyzed using the method of moments. The radiation characteristics are found to be comparable to those of a conventional spiral antenna with antiphase excitation. The frequency bandwidth for a 3-dB axial-ratio criterion is 18% (20% for antiphase excitation), with a gain of approximately 8 dBi (8 dBi for antiphase excitation). The input impedance is almost constant at 170 - j30 ohms.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 1-9 |
| ページ数 | 9 |
| ジャーナル | Electronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi) |
| 巻 | 86 |
| 号 | 4 |
| DOI | |
| 出版ステータス | Published - 2003 4月 |
| 外部発表 | はい |
ASJC Scopus subject areas
- コンピュータ ネットワークおよび通信
- 電子工学および電気工学