A fully integrated 2 ×2 CMOS transceiver at 60 GHz with energy harvesting capability in the transmitter mode and on-chip dipole antennas is demonstrated. The radio supports on-off-keying (OOK) modulation and a programmable data rate of 38 to 2450 Mb/s at a BER of less than 5 ×10 ^-4. The power consumption of the transmitter scales with data rate from 100 μW to 6.3 mW at 5 cm range and from 260 μW to 11.9 mW at 10 cm range. This yields an energy efficiency of 2.6 pJ/b at 5 cm and 4.9 pJ/b at 10cm. The energy harvesting circuits operate at 2.45 GHz with an average efficiency of 33%. The harvesting antenna and its matching components are off-chip. The complete transceiver including the energy harvesting block and on-chip antennas occupies 1.62 mm ² in 40 nm CMOS.