Development of a low noise L-band dielectric resonator oscillator

This paper describes the design and performance of a dielectric resonator oscillator near 1.3 GHz. Unique features of this oscillator are the very low single side-band phase noise levels achieved, the effectiveness of the vibration isolation system implemented and the parabolic frequency-temperature characteristic attained. A phase noise level of -132 dBc/Hz at 1 kHz offset and a noise floor of -175 dBc/Hz were measured under both quiescent and vibrating conditions. Phase noise data are presented under sinusoidal and random vibration conditions and a vibration sensitivity of 3/spl times/10/sup -10//g was measured at 25 Hz vibration frequency. The temperature sensitivity was 0.4 ppm//spl deg/C at 60/spl deg/C, about 7/spl deg/ from the measured turnaround temperature of 67/spl deg/C.<
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