RF oscillators stabilized by temperature compensated HBARs based on LiNbO(3)/Quartz combination

In this work, we develop a radio-frequency oscillator operating near the 434MHz-centered ISM band to validate the temperature compensated capability of HBAR based on combining LiNbO(3) and Quartz single crystal plates for such purposes. Electrical and thermoelectric characterizations have shown QF product in excess of 10(13) and a third order frequency-temperature behavior. A phase noise better than -160dBc/Hz at 100kHz has been measured as well as a -165dBc/Hz level at 1MHz from the carrier. First results showing that the resonator stability is better than 10(-9) under room conditions. Further work is expected to lower that level well below 10(-10).