In this paper, a direct up-conversion mixer with wide intermediate frequency (IF) bandwidth is designed and fabricated for 60-GHz applications. The up-converted differential signal is transformed to single-ended signal through an on-chip balun. In addition, an injection-locked frequency tripler is integrated for local oscillator signal generation. The measured results shows the maximum conversion gain of -5.6 dB, the input-referred 1-dB compression point (IP1dB) of -14 dBm, the third-order intercept point (IIP3) of -4 dBm, and 3-dB IF bandwidth of 3.5 GHz. The proposed up-conversion mixer is fabricated using 0.13-mum standard CMOS technology, and it draws only 2.25 mA from 1.2-V supply.