This paper presents a chip set of RF front-end circuits using 65-nm CMOS technology. The chip set includes a LNA, a down-conversion mixer, an up-conversion mixer and a medium power amplifier. The LNA has the 3-dB bandwidth from 68 to 75 GHz with a peak value of 17 dB. The down-conversion mixer has a conversion loss of better than -5 dB from 53 to 73 GHz at 4 dBm LO power. The up-conversion mixer has a conversion loss better than -5 dB from 53 to 75 GHz at 6 dBm LO power. The medium power amplifier delivers 5 dBm P
and 6.7 dBm P
at 71 GHz. These results show the potential of the 65-nm CMOS technology in high frequency circuit design.