NDLI: Broad-band (/spl ges/20 GHz) laser-diode-based optoelectronic microwave phase shifter

Content Provider	IEEE Xplore Digital Library
Author	Gong-Ru Lin Tzung-Shi Hwang Chuang, Y.-H. Wang, S.C. Ci-Ling Pan
Copyright Year	1963
Abstract	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/spl deg/ (/spl sim/3.6 /spl pi/) is achieved. The phase fluctuation and long-term drift of any desired phase shift are as small as /spl plusmn/0.40/spl deg/ and 0.08/spl deg/, respectively, at 20 GHz. The relative phase instability can be maintained within 0.09/spl deg/ 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.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	1419
Ending Page	1426
Page Count	8
File Size	167960
File Format	PDF
ISSN	00189480
Volume Number	46
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Masers Phase shifters Phase shift keying Frequency Voltage Digital filters Microwave filters Phase locked loops Tunable circuits and devices Fluctuations
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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