Extension of the frequency range of ceramic resonator oscillators using push-push circuit topology

Commercial ceramic resonator oscillator technology is limited to less than 3GHz with respect to the output frequency. The following paper presents results on ceramic resonator oscillator circuits capable of 4 and 5 GHz operation. Present work that extends the operating frequency of the oscillator to X and Ku bands is outlined, Measured phase noise for the oscillators at 10KEz offset is better than -1000dBc/Hz, It is demonstrated that the push-push oscillator topology is advantageous with respect to its implementation in phase locked loop circuits as a second output signal at half the oscillation frequency can be obtained from the oscillator for use as the RF input signal for a phase locked loop synthesizer. The results represent a significant breakthrough in the field of ceramic resonator oscillator technology and present a viable low cost signal source solution to high QAM microwave radio applications.