Author(s):

Martin Norling, Andrei Vorobiev, Harald Jacobsson, and Spartak Gevorgian

IEEE Transactions on Microwave Theory and Techniques, Vol. 55, No 2, February 2007

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A low-noise K-band VCO based on room-temperature ferroelectric varactors (pdf)

Abstract:
This paper reports a K-band voltage-controlled oscillator based on room-temperature ferroelectric varactors. The circuit is realised as a hybrid module where flip-chip transistors are mounted on a silicon substrate with integrated ferroelectric varactors and passive circuitry. The size of the module is 4.7×2.2 mm2. The measured centre frequency is 16.5 GHz with a linear tunability of 6.7% and an output power of 3 dBm±1 dB over then tuning range. The measured phase noise at centre frequency is -95 dBc/Hz at 100 kHz offset. Another version of the oscillator is measured operating at 19.6 GHz with a tunability of 3.3% and a phase noise of -102 dBc/Hz at 100 kHz offset.

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