Analytical Method for Gain Analysis of a Double Balanced Gilbert Cell Mixer

A novel analytical approach for gain analysis of a double balanced Gilbert Cell Mixer is presented on this paper. An initial design of a gilbert cell mixer with differential transistor pair for the core mixer and low noise amplifier for the RF input is evaluated. The method aims on showing how the gate width and length have an effect on the mixer conversion gain, and further an evaluation of how tuning resistive loads could maximize the gain by almost +200% is demonstrated. This paper is not focused on demonstrating the design of Gilbert cell mixer but the gain analysis of an initial ready-made design. The testing is carried out on Advance design system simulation software.