Conference proceeding
Phase control of optically injection locked oscillators for phased arrays
IEEE International Digest on Microwave Symposium, v 3, pp 1247-1250
1990
Abstract
The most suitable architecture for millimeter-wave frequencies is based on the transmit/receiver (T/R)-level data mixing architecture, where a frequency reference is provided to local oscillators in the subarrays to have them frequency and phase synchronized. The indirect subharmonic optical injection locking has the benefit of a high degree of frequency synchronization up to millimeter-wave frequencies; however, the local oscillators suffer from phase inaccuracy over the locking range, first formulated by R. Adler (1946). A scheme is proposed to measure this phase error and correct for it by adjusting the free-running oscillation frequency of a voltage controlled oscillator (VCO). Experiments supporting this approach are reported for two optically injection locked oscillators at 18 GHz, where controlled phase shifts over -90 degrees to 78 degrees are achieved by adjusting the bias current to a yttrium-iron-garnet (YIG) tuned VCO.< >
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Details
- Title
- Phase control of optically injection locked oscillators for phased arrays
- Creators
- A.S Daryoush - Drexel UniversityM FranciscoR SaediD PolifkoR Kunath
- Publication Details
- IEEE International Digest on Microwave Symposium, v 3, pp 1247-1250
- Conference
- IEEE International Microwave Symposium
- Publisher
- IEEE
- Number of pages
- 1
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Other Identifier
- 991019196543604721