Design Recommendations for Minimal Antenna Mutual Coupling Using Current Optimization

This work addresses a first attempt at using current density optimization algorithms to gain insight into the relation between maximum achievable gain in a given direction and the mutual coupling to another antenna nearby. The methodology is presented on the example of the coupling between two patch antennas placed above an infinite ground plane. The optimized antenna gain is shown to have a strong relation to the geometry of the problem. The obtained insight is then formulated into design recommendations that can help in an actual design.