A Grating-Based Circular Polarization Duplexer for Submillimeter-Wave Transceivers

被引：34

作者：

Cooper, Ken B. ^{[1
]}

Llombart, Nuria ^{[2
]}

Chattopadhyay, Goutam ^{[1
]}

Dengler, Bob ^{[1
]}

Cofield, Richard E. ^{[1
]}

Lee, Choonsup ^{[1
]}

Filchenkov, Sergey ^{[3
]}

Koposova, Elena ^{[3
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[2] Univ Complutense Madrid, E-28040 Madrid, Spain

[3] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2012年 / 22卷 / 03期

基金：

美国国家航空航天局;

关键词：

Grating polarizer; quasioptical duplexing; submillimeter wave radar; MILLIMETER-WAVE;

D O I：

10.1109/LMWC.2012.2184273

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 quasioptical duplexer based on a metallic grating polarizer has been designed and demonstrated in a submillimeter-wave imaging radar system. The grating converts between linear and circular polarization with low loss and high isolation, and it is simple to manufacture by cutting grooves into a scanning sub-reflector. The grating profile and period were optimized to provide good polarizing efficiency over the radar's 4.5% bandwidth of 660-690 GHz, with two-way mismatch loss simulated to be better than 0.1 dB over an 8% bandwidth. Similarly negligible loss is also predicted for grating rotations of +/-3 degrees, which span the radar's field of view. The circular polarization grating duplexer is shown to improve the signal-to-noise ratio by 4.5 dB compared to a beam splitter.

引用

页码：108 / 110

页数：3

共 10 条

[1] DIELECTRIC MEASUREMENTS OF MILLIMETER-WAVE MATERIALS [J].