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A compact resistive quadrature low noise Ka-band VCO SiGe HBT MMIC

: Dyskin, Aleksey; Wagner, Sandrine; Kallfass, Ingmar

Verband Deutscher Elektrotechniker e.V. -VDE-, Berlin; Institut für Mikrowellen- und Antennentechnik e.V. -IMA-:
German Microwave Conference, GeMiC 2019 : 25-27 March 2019, Stuttgart, Germany
Stuttgart, 2019
ISBN: 978-3-9812668-9-4
German Microwave Conference (GeMiC) <12, 2019, Stuttgart>
Fraunhofer IAF ()
voltage-controlled oscillator (VCO); SiGe; low power; quadrature coupler; ring oscillator

A compact resistive I/Q low noise Ka-band voltage-controlled oscillator is reported in this paper. The oscillator consists of two emitter-coupled logic based high-frequency inverters and a voltage-to-current converter for the oscillation frequency control. The oscillator provides differential I/Q outputs for future integration with a sub-harmonic down-conversion mixer. The oscillator demonstrates a gain of 4.31 GHz/V with a phase noise of -75 dBc/MHz at 1 MHz offset over the oscillation bandwidth. The oscillator consumes between 117 to 148 mW from a 4V supply for different tuning voltages. The oscillator was designed using a high-frequency design methodology and was then optimized for a low-noise operation