Development of High Frequency-Temperature Stability of OCXO for Aerospace Applications

With the performance upgrade of aerospace applications, the frequency source have raised higher requirement on frequency-temperature stability of OCXO (oven-controlled crystal oscillator). Based on the temperature control theory of OCXO and the character of frequency fluctuation in different temperature, we use analog temperature compensation technology in the design of OCXO. Finally, we realize a miniaturization 10 MHz OCXO for aerospace applications. This OCXO test result shows, the frequency-temperature stability is better than ±5.0E-9 with temperature range −30 to 70 °C.