Resonant frequency of uncovered and covered rectangular microstrip patch using modified Wolff model

A new model, called the modified Wolff model (MWM), is proposed to calculate the resonant frequency of a rectangular open microstrip patch, a patch with a dielectric superstrate and a patch inside a shielded enclosure. The model has also been applied to calculate resonant frequencies of higher-order modes. The dependence of resonant frequency on the various parameters and its accuracy are discussed using the MWM. Results obtained from MWM follow very closely the results from various forms of full-wave analysis, and in almost all cases they are within 0.5% of published experimental results for the fundamental mode and within 1.7% for higher-order modes. The method is computationally fast and efficient even on a desktop computer. The method could be used for other patches like circular, hexagonal and equilateral triangle