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Title A 24 GHz CMOS Receiver Front-end for In-Cabin Radar Systems
Authors (Yangji Jeon) ; (Suyeon Lee) ; (Jinman Myung) ; (Geonwoo Park) ; (Seungjik Lee) ; (Ockgoo Lee) ; (Hyunwon Moon) ; (Ilku Nam)
DOI https://doi.org/10.5573/JSTS.2021.21.4.279
Page pp.279-285
ISSN 1598-1657
Keywords CMOS; in-cabin; mm-wave; radar; receiver front-end
Abstract A 24-GHz direct-conversion receiver front-end is presented for in-cabin applications. The proposed RF receiver is composed of a low-noise amplifier, an I/Q down-conversion mixer, and an I/Q local oscillator (LO) generator circuit. An inverter -type transconductor with third-order nonlinearity cancellation is applied to the I/Q down-conversion mixer to improve the linearity of the I/Q down-conversion mixer. By adopting a linear I/Q down-conversion mixer and a balanced I/Q LO generator, the 24 GHz receiver front-end obtains high linearity and good I/Q balancing performance. The receiver front-end draws 21-mA current from a 1.2-V supply voltage. It shows a conversion gain of 30.4 dB, noise figure (NF) of 4.5 dB, and an input 1-dB compression point (input P1dB) of -23 dBm in the 24-24.5 GHz range.