Low Phase Noise X-Band Push-Push Oscillator with Frequency Divider

Published in:
IEEE MTT-S Int. Microwave Symp. Dig., 2005.
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Abstract:
A MMIC Colpitts oscillator in push-push configuration with integrated frequency divider using InGaP/GaAs HBTs is pre-sented. The output is taken from the second harmonic port while the fundamental signal is fed to a frequency divider by two thus provid-ing a reference signal at one quarter of the output frequency. The MMIC VCO reaches state-of-the-art phase-noise performance in X-band down to -120dBc/Hz at 1MHz offset frequency at high output power and a tuning range of 4%.

Index Terms:
Colpitts oscillator, Push-Push

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