Low Side-Lobe Circularly-Polarized Phased Arrays Using a Random Sequential Rotation Technique

被引：56
作者：
Smolders, A. B. [1 ]
Visser, H. J. [1 ]
机构：
[1] Eindhoven Univ Technol, NL-5600 MB Eindhoven, Netherlands
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2014年 / 62卷 / 12期
关键词：
Circular polarization; phased array antennas; random array; sequential rotation; wideband array;
D O I：
10.1109/TAP.2014.2359476
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 novel technique is presented for sidelobe and axial ratio control of circularly-polarized phased array antennas. Although our new random sequential rotation (RSR) concept uses a regular periodic array grid, it provides similar properties as randomly-spaced array antennas. In this way, a wideband behavior is provided, without the appearance of grating lobes. In addition, the gain is maximized, since a uniform amplitude distribution is used. A 4 GHz prototype consisting of 16 aperture-coupled-microstrip antennas with a beamformer was developed to demonstrate the basic properties of RSR array antennas. Although the element spacing is much larger than half a wavelength, well-controlled sidelobes are provided, even in the worst-case diagonal plane. The measured cross-polarization level at 4 GHz is below at a 20-degree scan angle in the diagonal-plane.
引用
收藏
页码：6476 / 6481
页数：6
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