A CMOS fully integrated antenna system transceiver with beam-formability for millimeter-wave active imaging

This paper presents the performance of a 65-nm CMOS antenna system transceiver with digital beam-formability for mm-wave active imaging. The 8-antenna array transmitter (Tx) has an ability of on-chip pulse delay calibration as our previous work. We developed the receiver (Rx) chip by employing FET direct power detection circuit including an on-chip antenna, low-pass filter and a 3-stage amplifier. Pulse delay calibration of the Tx is digitally implemented. Measured Rx´s output waveform after relatively aligning all Tx´s pulses is 0.91 mV and 3-ns duration with a 25-mm distance between Rx and Tx. Other Rx´s outputs are also measured by applying other differential delay codes of Tx and another distance to prove the system´s beam-formability. Experiment results show that the transceiver can not only implement on-chip digitally transmitted-pulse calibration but also detect beam-formed pulse for active imaging in medical diagnosis applications.