Improved Model to Compute Resonant Frequency of Right Angle Isosceles Triangular Patch Antenna with and without Suspended Substrate

An improved CAD model based on cavity model analysis has been proposed to compute the resonance frequency of a right angle isosceles triangular patch antenna (45-45-90) with and without suspended substrate. The model is found to be valid for wide range of antenna parameters like patch side length, substrate thickness and dielectric constant. A standard electromagnetic simulator (HFSS) has been employed to validate the present model. Better agreement (average % error 1.17) is observed between theoretical and simulated values compared to other model available in literature. Keywords— resonance frequency, CAD, right angle isosceles triangular patch, suspended substrate.