Neurospectral analysis of coaxial fed rectangular patch antenna

The importance of the spectral domain approach (SDA) is attributed mostly to its accuracy. Being a full-wave method, it is computer intensive. There are difficulties in numerically integrating the Green´s function due to the presence of poles in the integral path. The artificial neural network technique is being used in the field of microwave during the last five years or so. The use is mostly restricted to optimisation type of problems. This paper tries to extend earlier work of Assailly et al. (1988) and of Mishra and Patnaik (see IEEE MGWL, vol.9, no.9, p.351-53, 1999) on the use of ANN for analysis. Closed form expressions are obtained for the integrals involving the Green´s functions in the SDA. The resonant frequency is found using reverse training. The method is demonstrated by application to a coaxial fed rectangular patch antenna.