A low cost 24 GHz RF transceiver with four-RX and one-TX for radar sensor

This paper describes a 24 GHz CMOS RF transceiver for radar sensor applications. The transceiver is composed of four receivers, one transmitter with a power amplifier, a VCO, LDOs and an digital controller. The transceiver is fabricated in 0.13-um RF CMOS process, occupying 2.4 mm × 2.4 mm. The measured receiver gain is 35 dB and noise figure is 5.3 dB. The measured VCO phase noise is -108dBc/Hz at 1 MHz frequency offset and the output power of the transmitter is 10 dBm.