Optimization of Antenna Diversity Gain by Combining Full-Wave and Circuit Simulations

This paper presents a method for using data from full-wave EM simulations in combination with lumped circuit models for calculating antenna parameters such as radiation patterns, radiation efficiency, diversity gain etc. The method can be applied on multi-port antennas for arbitrary loading and excitation conditions. The paper also describes how the method is used in combination with a global optimization scheme to maximize the diversity gain for a given antenna and circuit layout. The goal function is maximized by optimizing the component values of the given circuit layout. Results for two parallel dipoles and a prototype mobile terminal, both cases with and without the optimized impedance network, are presented.