A 2.4 GHz low-power subthreshold active mixer applied to the satellite RF TV receiver is designed by using TSMC 0.13 μm CMOS technology. To achieve high linearity, the mixer employs the capacitive cross-coupling and interstage matching technique, and the current-bleeding technique is introduced to improve the gain of mixer. The final chip measured results show that the mixer exhibits a input third-order intercept point IIP3 of 5.41 dBm, a gain of 9.07 dB, a noise figure of 12.05 dB, and a low power dissipation of 1.6 mW. The mixer occupies an area of 0.91 mm×0.98 mm.