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アイテムタイプ	学術雑誌論文
タイトル	A Half-Moon Antenna
著者	著者名 NAKANO, Hisamatsu
	著者名 YAMAMOTO, Yusuke
	著者名 SETO, Masaaki
	著者名 HITOSUGI, Kazuo
	著者名 YAMAUCHI, Junji
言語	eng
ISSN	0018926X
出版者	IEEE
雑誌名	IEEE Transactions on Antennas and Propagation
	IEEE Transactions on Antennas and Propagation
号	12
開始ページ	3237
終了ページ	3244
発行年	2004-12
著者版フラグ	Version of Record
キーワード	small aperture antenna
	tilted beam formation
	wide radiation
	Terms?Cylindrical finite-difference time-domain (FDTD)
抄録	This work presents a half-moon antenna (HMA), which is composed of two semi-circular top and bottom conducting plates joined by a rectangular conducting plate. The HMA has a wide radiation beam. Radiation in the y-z plane (in the E plane) is hemispherical with a half-power beam width (HPBW) of more than 200°. Radiation in the x-y plane (in the H plane) forms a sector beam with an HPBW of more than 100°. To reduce the backward radiation and improve the gain, chokes are added to the HMA. An increase in the gain of approximately 1 dB is obtained. In order to obtain a tilted beam, the radius of the bottom plate is reduced. The maximum beam direction of the tilted beam θmax is not sensitive to frequency. Within a frequency range of 11 to 14 GHz (24%), θmax=167°±2°. The gain is found to be G=9.5±0.5 dBi within this same frequency range.
資源タイプ	Article
書誌レコードID	AA00667649
インデックス	資料タイプ別 ＞ 学術雑誌論文 ＞ 自然科学
	301 学術雑誌論文 ＞ 自然科学

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