An integrated down conversion front end for WiMAX applications

Abstract

This paper introduces an integrated down conversion front end receiver for WiMAX application. The proposed scheme comprises an RF amplifier, microwave oscillator and a passive down conversion mixer. The detailed design, performance of each sub unit and the final integrated unit are discussed. The design is validated using the circuit simulation and its response is competitive with recent commercial product. The results confirm that a local oscillator at 5.9 GHz can be mixed down with an RF input at 5.8 GHz to yield an IF signal with 100 MHz. The conversion loss of the proposed scheme is 7 dB which is competitive with market components.