J. Haidar et al., OPTICALLY TUNABLE MICROWAVE ATTENUATOR USING A QUARTER-WAVE MICROSTRIP COUPLER, Microwave and optical technology letters, 10(6), 1995, pp. 313-314
We describe an optically controlled microwave attenuator based on a mi
crostrip reverse directional coupler where optical illumination modifi
es the loads at the coupling and transmission ports. A tunable attenua
tion up to 10 dB was measured at the center frequency. Experimental an
d theoretical results are compared and agree well. (C) 1995 John Wiley
& Sons, Inc.