In this paper, the wave concept iterative procedure (WCIP) is presented to analyse the H-shaped patch antenna circuits. The principles of the WCIP is described, the advantages of the WCIP is discussion. The two-dimension Fast Fourier Transformation (2D-FFT) is used to simplify calculations and to take the excellence of the spatial and spectral domain for analysis. The numerical results show a good agreement compared with the HFSS simulation data, which illustrates the efficiency and correctness of WCIP.