Amplitude and Phase Control of an RF Signal Using Liquid-Crystals by Optoelectronic Method
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概要
- 論文の詳細を見る
An optoelectronic technique to control both the amplitude and phase of a radio frequency (RF) signal is presented that uses two electrically controllable birefringence mode nematic liquid-crystal spatial light modulators (ECB mode nematic LC-SLMs). An experimental circuit was built and its performance was examined. The intensity could be changed down to -25 dB, and a phase shift of up to 240 degrees was achieved, by changing LC-SLM supplied voltages. Carrier-to-noise ratio (CNR) and intermodulation characteristics of an RF signal were measured. It was, for the first time, found that CNR was not degraded by the amplitude control and phase shift performed by the LC-SLMs.
- 一般社団法人電子情報通信学会の論文
- 1995-08-25
著者
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Ogawa H
National Inst. Of Information And Communications Technol. Yokosuka‐shi Jpn
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OGAWA Hiroyo
NTT Wireless Systems Laboratories
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Kobayashi Osamu
NTT Wireless Systems Laboratories
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