Electronic Devices Raja MAHMOU, Khalid FAITAH 4 1 2015 A down conversion RF mixer is designed with 65nm CMOS technology for a different low power consumption applications. Mixer structure comprises a double-balanced Gilbert-Cell with improving linearity method in the RF stage of circuit; all is at a supply voltage of 1.8V and a power of 2.17 mW. The circuit is simulated for different spectrum applications as: 200 MHz mobile users, 1.9 GHz wireless applications, and 20 to 60 GHz commercial satellite and point to- point communications. The reported design achieves good values in terms of a radio frequency mixer evaluating parameters such as: Consumed Power, Conversion Gain, Noise Figure and Linearity.