Analysis of an H-shape cross slotted aperture-coupled microstrip patch antenna

An analysis and equivalent circuit model for an H-shape cross slotted aperture-coupled microstrip patch antenna (ACMPA) are presented. The study in the paper helps us to understand better the antenna property and also provides an easy way to design the antenna. The ACMPA consists of three conductor layers such as patch, ground plane, and feed line. The coupling exists in two places. One between the patch and a slot in the ground and the other between the slot and the feed line are represented by the ideal transformers. To calculate the turn ratio of the ideal transformer effectively the reciprocity theorem and the spectral-domain immittance approach are used. Moreover, vertical slots of `H´ slot are considered as the reactive loads. The H-shape cross-slotted ACMPA operating at 3 GHz and 5 GHz simultaneously is fabricated. The good agreement between theoretical and measured results is shown.