標題: Broad-band (>= 20 GHz) laser-diode-based optoelectronic microwave phase shifter
作者: Lin, GR
Hwang, TS
Chuang, YH
Wang, SC
Pan, CL
光電工程學系
Department of Photonics
關鍵字: microwave;optoelectronic;phase shifter
公開日期: 1-Oct-1998
摘要: We demonstrate a new type of broad-band microwave phase shifter with superior performance at frequencies up to 20 GHz. This is implemented by simply adding an offset voltage prior to the loop filter (LF) in a laser-diode-based digital optoelectronic phase-locked loop (OEPLL), Accurate control of the phase of microwave signals with a continuously tunable range exceeding 640 degrees (similar to 3.6 pi) is achieved. The phase fluctuation and long-term drift of ally desired phase shift are as small as +/-0.4 degrees and 0.08 degrees, respectively, at 20 GHz, The relative phase instability can be maintained within 0.09 degrees while operating in a phase-shift-keying (PSK) scheme, We also demonstrate accurate control of relative phase difference between dual phase-locked microwave sources using the phase shifter. Our results indicate potential application of this broad-band optoelectronic phase shifter in a phased-array antenna system.
URI: http://dx.doi.org/10.1109/22.721143
http://hdl.handle.net/11536/31853
ISSN: 0018-9480
DOI: 10.1109/22.721143
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 46
Issue: 10
起始頁: 1419
結束頁: 1426
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