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Modeling and analysis of finite phased arrays of microstrip antennas : an eigenvector approach

In this paper, a model is developed to determine characteristics of finite phased arrays of microstrip antennas. This model concerns a finite array of simple elements: perfectly conducting, infinitely thin, narrow rings, excited by voltage gaps and positioned in free or above a ground plate. The currents on the rings, and from that the electromagnetic field, are calculated by a moment method. Dimension analysis is carried out to reduce numerical effort and to acquire insight in the array behaviour. The first step is made towards determining the array characteristics by linking the eigenvalue behaviour of the moment impedance matrix to mutual cou-