SIW-Based Low Phase-Noise Millimeter-Wave Planar Dual-Port Voltage-Controlled Oscillator

Abstract

In this paper, a low phase-noise millimeter-wave planar dual-port voltage-controlled oscillator (VCO) using a novel electronically tunable substrate integrated waveguide (SIW) resonator is proposed. The VCO operates in the Ka- and E-band simultaneously. At the fundamental-wave port, the VCO achieves a tuning rang of more than 120MHz by varying the varactor tuning voltage from 0 to 11V, spurious output less than −40 dBc, and a phase-noise of −114.7 dBc/Hz at 1MHz offset from 32 GHz carrier frequency. Meanwhile, at the harmonic port, a tuning rang of more than 240MHz around 64GHz carrier frequency is achieved. The measured output power varies from 6.04 to 8.75 dBm and 7.2 to 9.46 dBm within the fundamental-wave and second harmonic tuning ranges, respectively. This type of low phase-noise planar dual-port VCO is very suitable for millimeter-wave applications in high stable phase-locked sources or FMCW radars.