Investigation of mutual coupling between the resonators in microstrip antenna array

The paper investigates, by simulation, the change of parameters S11 and S13 among three rectangular microstrip resonators in a linear antenna array by changing the distance between them. The middle element is parasitical. This influence is investigated in the E- and H-planes with different values of the parameters (permittivity, ε_r, and thickness, h) of the dielectric substrate. In. the next investigation, diagonally placed patches are described. The results and physical processes of the electromagnetic mutual coupling are commented. Besides, they can be used as basic considerations in designing a microstrip antenna array. These results show the influence between two resonators. Besides, they can be used as basic considerations in the design and development of antenna arrays.