Proceedings Article10.1109/MWP.1999.819676
Continuously tunable phase controller for microwave oscillators by using optoelectronic phase-lock loop
Gong-Ru Lin
- 17 Nov 1999
- pp 165-168
TL;DR: In this article, a laser-diode-based optoelectronic phase-locked loop (OEPLL) was developed for phase tracking free-running microwave signals beyond 20 GHz.
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Abstract: We have successfully developed a laser-diode-based optoelectronic phase-locked loop (OEPLL) for phase-tracking free-running microwave signals beyond 20 GHz. In this work, we modify the OEPLL system to demonstrate a broadband, frequency-independent, and continuously tunable microwave phase shifter. The key parameters of the OEPLL-based phase shifter (OEPLL-PS) such as the maximum phase-shifting range, tuning accuracy, linearity, insertion loss, long-term phase stability as well as switching response were investigated. We also demonstrate the precise control of relative phase change between two phase-locked microwave oscillators by using the OEPLL-PS.
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References
Broad-band (/spl ges/20 GHz) laser-diode-based optoelectronic microwave phase shifter
TL;DR: In this paper, a broad-band microwave phase shifter with a continuously tunable range exceeding 640/spl deg/ (/spl sim/3.6 /spl pi/) was demonstrated.
Optoelectronic phase tracking and electrooptic sampling of free-running microwave signals up to 20 GHz in a laser-diode-based system
TL;DR: In this article, the phase and amplitude of the microwave signal in a microstrip line are measured using another 1.3/spl mu/m laser diode driven by the VCO.
20
Optically controlled generation and true-time-delay phase-shifts of broad-band 60-GHz signals
TL;DR: In this paper, a new technique of generating true-time-delay phase shifts of broadband microwave and millimeter-wave signals through optical control has been demonstrated, achieving continuous and precise phase shift with a range of 360 degrees.
18
Broadband microwave fiber-optic links with RF phase control for phased-array antennas
J.B. Georges,Kam Y. Lau +1 more
TL;DR: In this article, the use of injection-locked self-pulsing laser diodes as optical transmitters in RF fiber-optic links is described, in which the RF phase of the transmitted signal can be continuously adjusted by simply varying the bias current into the laser.
12
True time-delay fiber-optic control of an ultrawideband array transmitter/receiver with multibeam capability
TL;DR: In this article, a true time-delay beamformer based on a fiber-optic dispersive prism is developed and characterized for the control of an ultrawideband time-steered array antenna.