Performance Analysis of 1.8 GHz to 5 GHz HEMT Multiband Mixer

This paper presents the design methodologies and implementation of HEMT RF down conversion Mixer for 1.8 GHz to 5 GHz wireless and mobile applications.In many recent receiver designs, the front-end mixer determines the receiver's sensitivity and better isolation for the system. Single transistor mixer are developed for such an applications i.e. a Common source configuration, where the LO signal is applied to the source of the HEMT transistor for better isolation and lower power requirements. The mixer has the conversion gain of 4.4 to 8.5 dB, noise figure of 2 to 2.5 dB and a low power consumption at 2.5 V supply with better isolation of multiband mixer.