ACOUSTOOPTIC LIQUID-CRYSTAL ANALOG BEAM FORMER FOR PHASED-ARRAY ANTENNAS

被引：22
|
作者：
RIZA, NA
机构：
[1] General Electric Corporate Research and Development Center, Schenectady, NY, 12301, P.O. Box 8
来源：
APPLIED OPTICS | 1994年 / 33卷 / 17期
关键词：
BRAGG CELLS; NEMATIC LIQUID CRYSTALS; ANALOG; PHASED-ARRAY ANTENNA;
D O I：
10.1364/AO.33.003712
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A compact phased-array antenna acousto-optic beam former with element-level analog phase (0-2pi) and amplitude control using nematic-liquid-crystal display-type technology is experimentally demonstrated. Measurements indicate >6-bit phase control and 52.6 dB of amplitude-attenuation control. High-quality error calibration and antenna sidelobe-level control is possible with this low-control-power analog beam former. Optical system options using rf Bragg cells or wideband Bragg cells are discussed, with the rf design being the current preferred approach. Transmit-receive beam forming based on frequency upconversion-downconversion by electronic mixing is introduced for the rf Bragg-cell beam former, and comparisons with digital beam forming are highlighted. A millimeter-wave signal generation and control optical architecture is described.
引用
收藏
页码：3712 / 3724
页数：13
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