A design of wideband circularly polarized antenna with high gain. Issue 6 (June 2014)

• Record Type: Journal Article
• Authors: Liu, Neng‐Wu; Zhang, Zhi‐Ya; Zhao, Jia‐yue; Fu, Guang; Yao, Ya‐li
• Is Part Of: Microwave and optical technology letters. Volume 56:Issue 6(2014:Jun.)
• Page Start: 1274
• Page End: 1277
• Publication Date: 2014-06
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.28347
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A wideband circularly polarized (CP) antenna with high gain is proposed. The circular polarization performance is obtained by two pairs of orthogonal bowtie dipoles with a coaxial balun feed and a broadband 90° hybrid feed network. Particularly, a design of rectangular ring with eight shorted posts is added around the bowtie dipoles, which can obtain a high gain. To further improve the gain of the novel antenna, a circular ring is placed around the rectangular ring on the same plane. With such an arrangement, the proposed antenna delivers a higher gain than that of the conventional dual‐fed type CP antenna. The measured results show that the proposed antenna can achieve a measured impedance bandwidth for VSWR ≤ 1.5 of 61.5% and a 3‐dB axial ratio bandwidth of 66.7%. The antenna has a stable peak CP gain better than 10.3 dBi ranging from 1.1 to 1.6 GHz. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1274–1277, 2014</p> </abstract>