This paper presents the development of an up conversion mixer for wireless transmitter application in a 0.18-μm CMOS technology. The designed up-conversion mixer input center frequency is 620MHz and the output is 2.4GHz and 5.2GHz, respectively, for white space of TV broadcast frequency (470∼710MHz) communication system. In this design, it is become available by constructing dual band filter using bonding wires and chip inductors. The mixer is designed using TSMC 0.18μm CMOS process. Circuit simulations and measurements had been performed. The proposed mixer has a simulated conversion gain of 15.5dB and 16.2dB, IIP3 of -3.35dBm and -1.76dBm, noise figure of 5.32dB and 5.32dB at 2.4GHz and 5.2GHz.