SLOW WAVE-MODIFIED LOW PROFILE PLANAR SPIRAL ANTENNA ON EBG

被引：2
|
作者：
Sapna, B. A. [1 ]
Patnam, Hanumantha Rao [1 ]
机构：
[1] Ctr Electromagnet, SAMEER, Madras, Tamil Nadu, India
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2009年 / 51卷 / 05期
关键词：
electromagnetic band gap (EBG); planar spiral; PEC; slow wave spiral;
D O I：
10.1002/mop.24303
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A two arm Archimedean spiral antenna is modified to form various slow wave structures that have much lower operating frequency, than the conventional spirals, making them compact elements for wideband array applications. Uni-directional patterns are obtained from a slow wave modified circular star spiral with electromagnetic band gap (EBG) structure. Measured return loss of circular star spiral at 2 GHz backed by perfect electric conductor at lambda/4 is -16.37 dB and this is improved to -20.25 dB when the antenna is placed over an EBG at a separation of lambda/10. The radiation pattern of antenna on EBG provides a back lobe suppression of 30 dB over an isolated planar modified spiral antenna. (C) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1270-1274, 2009: Published online in Wiley InterScience (www.interscience,wiley.com). DOI 10.1002/mop.24303
引用
收藏
页码：1270 / 1274
页数：5
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