An oscillator design using low g-sensitivity, low phase noise STW devices

Focuses upon results of integrating surface transverse wave (STW) technology into an oscillator product line. Phase noise of <-100 dBc/Hz at 100 Hz, noise floor of <-180 dBc/Hz, and g-sensitivity of <5/spl times/10/sup -10/ per g have been achieved at 1 GHz using STW technology. Select units have exhibited g-sensitivities below 1/spl times/10/sup -10/ per g. These 1/f and g-sensitivity results represent state of the art for 1 GHz STW oscillators. The above low phase noise and low g-sensitivity (<5/spl times/10/sup -10/ per g) have been achieved in a 1.5"/spl times/1"/spl times/.2" package. In addition, this g-sensitivity performance is attained in an industry-standard, 14-pin dual in-line package (DIP) measuring 87"/spl times/.5"/spl times/.24". Bare hybrid oscillator products with hermetically-sealed resonators have been developed at a size of .715"/spl times/.380"/spl times/.110" for subsequent hermetic module integration. Design techniques have resulted in production of standard oscillators From 300 MHz to nearly 1200 MHz and over temperature ranges from -55 degrees Celsius to +110 degrees Celsius using the exact same hybrid substrate design. The design of this hybrid circuit is discussed.