双线背射模螺旋作馈源的背射式天线  

A Backfire Antenna Fed by a Bifilar Backfire Mode Helix

作　　者：郝晋[1] 马福昌[1] 李鸿鹰 李瑞莲[1] 

机构地区：[1]太原理工大学

出　　处：《应用科学学报》1999年第4期473-475,共3页Journal of Applied Sciences

基　　金：山西省青年学科带头人基金

摘　　要：提出把双线背射螺旋作为短背射天线的馈源时，可得到一种性能优良的新天线．文中给出了螺距角α＝ １０°、１２°、１４°和１６°时双线背射螺旋作馈源的实验结果，同时得出α＝ １４°时天线综合性能最佳，最大增益可达１９．７ｄＢ．它具有结构简单、馈电方便、遮挡小、频带宽、增益高且易于产生圆极化波等优点，性能远优于带相同接地板的螺旋天线、普通短背射天线以及单线背射螺旋作馈源的短背射天线．A backfire antenna ofgood characteristics is described in this paper. Ithas a new feed—bifilarbackfire helix. Itsfoursituationsofpitch anglesα= 10°,12°,14°and 16° are m easured. By com parison, the bestpitch angle is 14°. The antenna has a m axim um gain of 19.7dB. The new antenna has the advantages of sim ple structure, easy feeding and a wide frequency range, and circular polarized wave. The characteristics are m uch better than a bifilarbackfire helicalantenna, a shortbackfire antenna and a backfire an- tenna fed by a m onofilar backfire helix.

关 键 词：天线 双线背射模螺旋 馈源 短背射天线 

分 类 号：TN823.31[电子电信—信息与通信工程]