双线背射模螺旋作馈源的背射式天线

Journal of Applied Sciences ›› 1999, Vol. 17 ›› Issue (4): 473-475.

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A Backfire Antenna Fed by a Bifilar Backfire Mode Helix

HAO JIN, MA FUCHANG, LI HONGYING, LI RUILIAN

Department of Electronic Information Engineering, Taiyuan University of Technology, Taiyuan 030024

Received:1998-07-16 Revised:1999-01-20 Online:1999-12-31 Published:1999-12-31

Abstract

Abstract: A backfire antenna of good characteristics is described in this paper.It has a new feed-bifilar backfire helix.Its four situations of pitch angles T=10°,12°,14ånd 16° are measured.By comparison,the best pitch angle is 14°.The antenna has a maximum gain of 19.7dB.The new antenna has the advantages of simple structure,easy feeding and a wide frequency rang e,and circular polarized wave.The characteristics are much better than a bifilar backfire helical antenna,a short backfire antenna and a backfire antenna fed by a mono filar backfire helix.

Key words: bifilar backfire mode helix, short backfire antenna, antenna, feed

HAO JIN, MA FUCHANG, LI HONGYING, LI RUILIAN. A Backfire Antenna Fed by a Bifilar Backfire Mode Helix[J]. Journal of Applied Sciences, 1999, 17(4): 473-475.

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A Backfire Antenna Fed by a Bifilar Backfire Mode Helix

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