Ka‐band wideband VCO with LC filtering technique in 65‐nm CMOS

Abstract

This Letter reports a 25.80–30.84 GHz wideband millimetre‐wave VCO in 65‐nm CMOS technology. A 4‐bit binary‐weighted capacitor bank is used to extend the tuning range. The PMOS current source, as well as the LC noise filtering network, are used to improve the phase‐noise performance. Occupying a core area of 0.056 mm 2 , the implemented VCO core consumes 4.1 mW at a 1 V supply. At 26 GHz, it achieves a phase noise of −102.8 dBc/Hz at 1 MHz offset.