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A 29-GHz low phase noise differential voltage controlled oscillator (VCO) using 2-mum AlGaAs/GaAs HBT process is presented in this paper. A common-emitter (CE) topology with a capacitive feedback is utilized to the circuit design. This circuit demonstrates a measured phase noise of -112 dBc/Hz at 1-MHz offset frequency, a tuning range of 0.55 GHz and an output power of higher than 1 dBm.
A series of voltage-controlled oscillator (VCO) covering 12 to 21 GHz with double-tuned configuration using commercially available 2-mum GaAs heterojunction bipolar transistor (HBT) technology is presented. Double-tuned topology improves the tuning bandwidth and linearity in voltage sensitivity. The tuning bandwidth of the VCOs ranges from 21 to 25%, with phase noise of -117 to -124 dBc/Hz at 1 MHz...
In this paper, a Ku-band low phase noise wide tuning range voltage controlled oscillator (VCO) using a 2-mum GaAs heterojunction bipolar transistor (HBT) technology is presented. A common-emitter (CE) topology with an inductor-capacitor (LC) feedback network is utilized in the circuit design, and the VCO demonstrates a low phase noise of -112.5 dBc/Hz at 1-MHz offset carrier frequency. The tuning...
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