This presentation describes the simulation of one proposed antenna, designed to permit communication between devices in each ear. The design was simulated in the presence of a homogeneous SAM phantom and an anatomically correct, heterogeneous head model. Since the antenna exhibits different performance characteristics depending upon the head model used, a parameter sweep was conducted to determine the optimal configuration for each model. The simulation results illustrate the differences between the head models, suggesting a heterogeneous head model will yield more acceptable results and will improve the safety of the device when used by real human subjects.