Beam-Scanning Improvement of Reflectarrays Using Single-Layered Sub-Wavelength Elements

被引：0

作者：

Guo, Lu ^{[1
]}

Tan, Peng-Khiang ^{[1
]}

Chio, Tan-Huat ^{[1
]}

机构：

[1] Natl Univ Singapore, Temasek Labs, T Lab Bldg,5A,Engn Dr 1, Singapore 117411, Singapore

来源：

2015 IEEE 5TH ASIA-PACIFIC CONFERENCE ON SYNTHETIC APERTURE RADAR (APSAR) | 2015年

关键词：

Reflectarray; broadband; pyramidal horn; double circular ring element; sub-wavelength; beam scanning;

D O I：

暂无

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 paper studies the use of double concentric circular ring elements arranged in a sub-wavelength grid on a single layer of substrate, in an effort to enhance the beam scanning capability of reflectarrays. The work is carried out at 10 GIIz on a 405mmx405mm aperture. In addition to a broad gain bandwidth, the reflectarray with a sub-wavelength grid demonstrates a superior beam-scanning performance compared to the one with lambda/2 grid. The measured results show that the reflectarray with 0.3 lambda grid spacing realizes a 1-dB gain bandwidth of 22% with an aperture efficiency of 56.6%. With the reflectarray fixed, this paper investigates the possibility of beam scanning by displacing the feed horn laterally. The results show that beam scanning of +/- 15 degrees is possible while retaining the broadband characteristics.

引用

页码：131 / 134

页数：4

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