A mixed Si and GaAs chip set for millimeter-wave automotive radar front-ends

Abstract

A chip set consisting of three GaAs HEMT MMICs (voltage-controlled oscillator, medium power amplifier, subharmonic mixer) and a discrete Si Schottky niiser diode has been developed for 77 GHz autoniotive radar systems. It facilitates the realization 0 1 i~ high performance millimeter-wave radar front-end with a minimum amount of chip area and, coiisequently, low production costs.

A CPW-Based 77 GHz Power Amplifier with Cascode Structure Using a 130 nm In0.88GaP/In0.4AlAs/In0.4GaAs mHEMTs

“…Recently, the 77 GHz automotive radars has become popular, as reflected in the literatures [1]～ [5] . In a typical automotive radar application, the transmitting power from the transceiver is 10 dBm at the antenna port.…”

An X-Band CMOS Multifunction-Chip FMCW Radar

“…Recently the ITS (Intelligent Transportation System) group proposed the deployment of Xband FMCW sensor for detection of vehicle volume, occupancy, speed, and classifications of multi-lane highway transportation system. Although most of FMCW-based sensors known to date had been made by the hybrid microwave/millimeter-wave integrated circuits [5], literature survey indicated that a handful of FMCW chips were reported, namely, 94 GHz radar [1,3,4], 77 GHz sensor [6,7], 10 GHz radar [8], 4.8 GHz Doppler sensor [2], all made by GaAs MMIC (monolithic microwave/millimeter-wave integrated circuit) technology. To authors' best knowledge, we present the first CMOS multifunction chip for use in RF front-end of the FMCW-based sensor or radar.…”

24‐line of Brillouin‐Erbium fiber laser utilizing a Fabry–Pérot cavity in L‐band

“…Multiwavelength generation based on Erbium-doped fiber lasers (EDFLs) have been proposed and demonstrated in the C-hand (1530-1565-nm) region for various schemes. Significant progress has been made in improving the schemes and performance of multiwavelength EDFLs during the past few years [1][2][3]. Multiwavelength oscillation in the L-hand (1570-1605 nm) has also been demonstrated [4][5][6].…”