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Continuous Tunable Phase Shifter Based on Injection Locked Local Oscillators at 30 GHz
(2006)2006 IEEE MTT-S International Microwave Symposium DigestInjection locking is used to achieve a continuous tunable phase shift over 280deg at 30 GHz. By locking a free running VCO at 15 GHz to an external reference source and doubling the output signal a very linear phase tuning range can be achieved. A phase noise of -117 dBc/Hz and -140 dBc/Hz at 100 KHz and 1 MHz offset frequency, respectively, have been measured. The prototype phase shifter is build on high epsiv r = 10.2 RT/Duroid substrate ...Conference Paper