No abstract

A transceiver pixel for active imaging incorporating a transmitter (TX) and a coherent receiver (RX) is demonstrated in 65 nm CMOS at 260 GHz. The pixel occupies an area of 450 × 580µm 2 and is the first demonstration of pixels incorporating a TX and a coherent RX which are smaller than λ/2 × λ/2. The pixel exhibits −21.3 dBm total radiated power and −79.5 dBm sensitivity at a 1 kHz noise bandwidth. This sensitivity is about 10 dB better than the state-of-the-art pixel with only a coherent RX. The pixel consumes 18.7 mW of DC power.