Finding Optimal Total Active Reflection Coefficient and Realized Gain for Multiport Lossy Antennas

A numerically effective description of the total active reflection coefficient and realized gain is studied for multiport antennas. Material losses are fully considered. The description is based on operators represented in an entire-domain port-mode basis, i.e., on matrices with favorably small dimensions. Optimal performance is investigated, and the conditions on optimal excitation and matching are derived. The solution to the combinatorial problem of optimal ports' placement and optimal feeding synthesis is also accomplished. Four examples of various complexities are numerically studied, demonstrating the advantages of the proposed method. The final formulas can easily be implemented in existing electromagnetic simulators using an integral equation solver.

Automated summary

This study focuses on a numerically effective description of the total active reflection coefficient and realized gain for multiport antennas, taking into account material losses. The approach is based on operators represented in an entire-domain port-mode basis, with matrices of small dimensions. Optimal excitation and matching conditions are investigated, along with solving the combinatorial problem of optimal ports' placement and feeding synthesis. Numerical examples highlight the advantages of the proposed method, which can be easily implemented in existing electromagnetic simulators.