A fully integrated K-band balanced voltage controlled oscillator (VCO) is presented. The VCO is realized using a commercially available InGaP/GaAs hetero-junction bipolar transistor (HBT) technology with the f(T). of 60 GHz; and the f(MAX) Of 116 GHz. To generate negative resistance at mm-wave frequency, common base inductive feedback topology is used. The VCO provides the oscillation frequency from 21.90 GHz to 22.33 GHz. The frequency tuning range is about 430 MHz. The peak output power is - 0.3 dBm. The phase noise is - 108.2 dBc/Hz at 1 MHz offset at, the operating frequency of 22.33 GHz. The chip area is 0.84 x 1.00 mm(2).