Abstract: Based on TSMC 0.18 μm CMOS technology, a low-noise and high-gain mixer was designed. The mixer has a Gilbert cell configuration that employs lownoise transconductors designed using noise-cancelling technique. The current-bleeding technique was also used so that a highgain can be achieved. Simulation results indicated that the mixer exhibits a conversion gain of 12.65 dB, a double-sideband noise figure of 4.23 dB, a thirdorder intermodulation intercept point of 3.45 dBm with a consumption of 9.9 mA at 1.8V when the local-oscillator (LO) frequency is 2.39 GHz and the radiofrequency frequency is 2.4 GHz.