A resistive double-balance mixer using bulk-driven method with low pumping power in 0.18 μm CMOS technology

This paper presents a 0.18 μm CMOS resistive double-balanced mixer using bulk-driven method with -1.3 dBm pumping power of local oscillator (LO), for 5.8 GHz dedicated short range communications (DSRC) applications. The LO signal is applied to the bulk and the source terminals differentially to reduce the required LO power without needs of impedance matching. The on-chip central-taped transformers are utilized as balance-to-unbalance (BALUN) function for RF and LO ports, while the differential output is used for intermediate-frequency (IF) port. The measured results show about -8 dB conversion gain and 8 dB noise figure in 5.8 GHz of RF frequency and 100 MHz of IF frequency. The input 1 dB compression point and the input interception point in the third order (IP3) are about -7.5 dBm and 3 dBm, respectively, to fulfill the mobile communication requirements.