BROADBAND CIRCULARLY POLARIZED BEAM-STEERING ANTENNA ARRAY FOR WIRELESS APPLICATIONS

被引:12
|
作者
Aribi, T. [1 ]
Naser-Moghadasi, M. [1 ]
Sadeghzadeh, R. A. [2 ]
机构
[1] Islamic Azad Univ, Sci & Res Branch, Fac Engn, Tehran, Iran
[2] KN Toosi Univ Technol, Fac Elect & Comp Engn, Tehran, Iran
关键词
circular polarization; switched beam; axial-ratio; bandwidth; SQUARE SLOT ANTENNA;
D O I
10.1002/mop.28707
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
This article describes the implementation of a broadband circularly polarized (CP) antenna array for switched beam applications. The antenna comprises of four identical CP slot elements in a 2 x 2 configuration that uses a 4 x 4 feeding network. Each CP slot element in the array is sequentially rotated with respect to each other to enhance the antenna's axial-ratio (AR) bandwidth. Measured results confirm the array exhibits an impedance bandwidth of 2.25 GHz that extends over the frequency range 4.6-6.85 GHz (similar to 40%) for S-11 <= -10 dB, and 3 dB AR bandwidth of 1.7 GHz that extends between 4.8-6.5 GHz (similar to 30%). The antenna's gain is in excess of 6.8 dBi between 5-6 GHz. (C) 2014 Wiley Periodicals, Inc.
引用
收藏
页码:2813 / 2816
页数:4
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