A novel technique for analysis of finite and infinite array antennas

The SEMN (surface equivalence principle and multiport network theory) method is potentially able to analyze arbitrary shaped microstrip antennas. Large structures and arrays cannot be analyzed by the time-consuming SEMN method. Here, two techniques are applied to improve computational efficiency, without accuracy and functionality loss. The modified method is applied to a four-element microstrip array and the results are compared with measurements, In addition, double Shank´s method, a numerical technique to speed up the convergence rate of the series is used to study an infinite periodic microstrip array. The results of an infinite probe-fed periodic microstrip array antenna are compared with the MOM solution. Excellent agreement is observed for both finite and infinite arrays.