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In this letter, an 80 GHz push-push VCO with a gm-boosted full-wave rectification pair for W-band (75 to 110 GHz) applications is presented. Incorporating a gm-boosted push-push pair as a full-wave rectifier not only increases second-harmonic swing but also operates at low power consumption. Besides, the distributed LC-tank structure helps to further split the parasitic capacitances of buffers and then the push-push pair can extend the frequency tuning range effectively. The push-push VCO is implemented in 90 nm CMOS technology , and it achieves a tuning range of 3.4% and phase noise of -104.2 dBc/Hz at 10 MHz offset. The core area is 0.3 × 0.21 mm2, and the power consumption is 2.66 mW from a 1.4 V supply voltage excluding buffers.