A Subwavelength Element for Broadband Circularly Polarized Reflectarrays

被引：91

作者：

Zhao, Gang ^{[1
]}

Jiao, Yong-Chang ^{[1
]}

Zhang, Fan ^{[1
]}

Zhang, Fu-Shun ^{[1
]}

机构：

[1] Xidian Univ, Natl Lab Antennas & Microwave Technol, Xian 710071, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2010年 / 9卷

关键词：

Broadband; circular polarization; reflectarray; single-layer; VARIABLE ROTATION ANGLES; LOOP ELEMENTS; DESIGN; CROSS; COMBINATION;

D O I：

10.1109/LAWP.2010.2047836

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 subwavelength element is presented for designing a circularly polarized (CP) reflectarray that converts the linearly polarized incident field of the feed into an outgoing circularly polarized field. To evaluate the performance of the designed element, a parametric study is carried out using Ansoft HFSS. Compared to the conventional near-resonant patch, the subwavelength one can realize a more similar behavior for the phase curves at different frequencies, leading to broader bandwidth. The phase shifts for both linear polarizations can be controlled by varying the x- and y-dimension of the element. Aprime-focus reflectarray with this type of element has been designed and implemented, and a superior bandwidth performance has been verified, compared to a reflectarray with conventional lambda/2 elements. The measured results show that the obtained 1-dB gain and 3-dB axial ratio bandwidths of the reflectarray with subwavelength elements can reach as large as 17% and 11%, respectively.

引用

页码：330 / 333

页数：4

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