A new design formulae for feed line dimensions of the rectangular microstrip patch antenna by using equivalent design concept

Abstract

The designing of rectangular microstrip patch antenna requires classical formulae to calculate. For every new design same formulae are used which is time consuming and lengthy. The Bhatnagar's Postulate gives the idea of transforming one design into another by using normalized thickness H (ratio of height of substrate to guided wavelength) and scaling factor ψ (ratio of the square root of the dielectric constant of the first design to second). But it is limited to patch only. This paper uses the same principle for calculating new formulae for the feed line dimensions. The first antenna design dimensions are calculated by classical formulae and then others are simulated with the new formulae of feed line dimensions, Bhatnagar's Postulate for the patch and the calculations of the first design. This gives very good results.