Novel Decoupling Technique for Enhancing the Mutual Coupling Between Printed Antennas

Abstract

Abstract-In this work, an E-shape Defected Ground Structure (DGS) is achieved to reduce the mutual coupling between two nearby microstrip antennas up to 47% (from 0.064 to 0.03). Both antennas radiate in the same frequency band of 10 GHz. The technique is based on a wall integrating periodic structure permitting the absorption of the electromagnetic field. By using this structure, it was possible to achieve a 20 dB reduction in the insertion loss S 21 between the two microstrip patch antennas with center-to-center distance of 0.45λ 0 (λ 0 is the free-space wavelength). The obtained coupling coefficient demonstrates that there is a good isolation between the two antennas. EM solver, simulating the reflection and transmission coefficients of the designed antenna arrays, achieves the reduction of the mutual coupling. The simulated results are verified by measuring the fabricated prototypes.

Design of a Circular Patch Antenna with a reflector for GPR applications

“…In order to obtain a wide operational bandwidth, the modification and reduction of the ground plane was performed based on two parameters [17] [19], which are W and L respectively referring to the width and the length of the ground plane. The carried out modification was performed at the punctual contact between the feeding line and the patch antenna.…”