Fast Analysis of Large Microstrip Patch Phased Arrays Using Generalized Forward Backward Method with DFT Based Acceleration Algorithm

Irregularly contoured two-dimensional arrays consisting of finite number of probe-fed microstrip patches are investigated using a generalized forward backward method (GFBM) with discrete Fourier transform (DFT)-based acceleration algorithm. In this method, unknown current coefficients corresponding to a single patch are first solved by a conventional method-of-moments (MoM) procedure. The solution is then found through an iterative procedure, namely GFBM, where it sweeps the current computation element by element (each element corresponds to a microstrip patch). A similar approach was reported previously for linear arrays of elements with arbitrary cross-sections