Abstract

DSRC provides high speed radio link between Road Side Equipment and On-Board Equipment within the narrow communication area.In this paper,a 5.8 GHz down-conversion mixer for DSRC communication system is designed and fabricated using 0.8 Pm SiGe HBT process technology and RF/LO matching circuits,RF/LO input balun circuits and IF output balun circuit are all integrated on chip.The measured performance is 7.5 dB conversion gain,-2.5 dBm input IP3,46 dB LO to RF isolation,56 dB LO to IF isolation,current consumption of 21 mA for 3.0 V supply voltage and the chip size of fabricated mixer is 1.9 mm X 1.3 mm.