N-bit optically controlled microwave signal attenuator using the photoconductive effect
Riza, Nabeel A.
Saddow, Stephen E.
Society of Photo-Optical Instrumentation Engineers (SPIE)
Various optical architectures for N-bit digital control of microwave signals are introduced that use the photoconductive (PC) effect in microwave waveguides for variable rf attenuation control. A 2-bit optically controlled microwave attenuator based on a silicon PC transmission line device is experimentally demonstrated at 990 Mhz. At 532 nm, this attenuator provided 0, 5.8, 11.2, and 15.6 of attenuation levels.
Photoconductive switch , N-bit attenuator , Optical control , Phased array antennas , Signal attenuation , Microwave radiation , Attenuators , Phased array optics , Antennas , Vertical cavity surface emitting lasers , Control systems
Riza, N. and Saddow, S. E. (1995) 'N-bit optically controlled microwave signal attenuator using the photoconductive effect', Proceedings of SPIE, 2560, Optical Technology for Microwave Applications VII; SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, San Diego, CA. USA, pp. 9-18. doi: 10.1117/12.218527
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