Amplitude and Phase Control of an RF Signal Using Liquid-Crystals by Optoelectronic Method

Osamu KOBAYASHI; Hiroyo OGAWA

Amplitude and Phase Control of an RF Signal Using Liquid-Crystals by Optoelectronic Method

Osamu KOBAYASHI, Hiroyo OGAWA

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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.

Publication: IEICE TRANSACTIONS on Electronics Vol.E78-C No.8 pp.1082-1089

Publication Date: 1995/08/25

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Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology)

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Osamu KOBAYASHI, Hiroyo OGAWA, "Amplitude and Phase Control of an RF Signal Using Liquid-Crystals by Optoelectronic Method" in IEICE TRANSACTIONS on Electronics, vol. E78-C, no. 8, pp. 1082-1089, August 1995, doi: .
Abstract: 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.
URL: https://globals.ieice.org/en_transactions/electronics/10.1587/e78-c_8_1082/_p

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@ARTICLE{e78-c_8_1082,
author={Osamu KOBAYASHI, Hiroyo OGAWA, },
journal={IEICE TRANSACTIONS on Electronics},
title={Amplitude and Phase Control of an RF Signal Using Liquid-Crystals by Optoelectronic Method},
year={1995},
volume={E78-C},
number={8},
pages={1082-1089},
abstract={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.},
keywords={},
doi={},
ISSN={},
month={August},}

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TY - JOUR
TI - Amplitude and Phase Control of an RF Signal Using Liquid-Crystals by Optoelectronic Method
T2 - IEICE TRANSACTIONS on Electronics
SP - 1082
EP - 1089
AU - Osamu KOBAYASHI
AU - Hiroyo OGAWA
PY - 1995
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E78-C
IS - 8
JA - IEICE TRANSACTIONS on Electronics
Y1 - August 1995
AB - 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.
ER -