A low-loss 60GHz integrated antenna switch in 65nm CMOS

A 60GHz integrated antenna switching architecture is presented for millimeter-wave transceiver system. This circuit topology re-uses the last stage's transistor of power amplifier (PA) and the first stage's transistor of low-noise amplifier (LNA) as the switching elements, and the matching blocks for PA and LNA. A two-stage LNA and a two-stage PA integrated together as antenna switch is fabricated on 65nm CMOS process. The presented method has lower loss than conventional quarter-wavelength based switches theoretically. LNA and PA are designed considering switching operation; hence there is less area penalty when compared with conventional methods. 2.9dB minimum noise figure (NF) in the receiver mode is measured, and 2 dBm of OP1dB is measured in the transmitter mode.