Design a Three-Layer Patch Antenna with Defected Ground Structure (DGS) and 3-Shaped Slot Array

A three-layer patch antenna with 3-shaped slot array and defected ground structure is offered in this paper. The work started with the patch antenna with single structure of 3-shaped slot. Then, it followed by addition of the four set of the 3-shaped slot array twin structures at each layer of patch antenna. The propose antenna had three layers of FR-4 substrate - a upper layer with 3-shaped slot at front and back side, a middle layer with 3-shaped slot at front and back side, while bottom layer contain a rectangular patch with a single 3-shaped slot structure. The last part is to add the defected ground structure (DGS) at the ground plane to optimize the performance of the antenna. The Design D antenna operates at tri-band at 2.452 GHz, 4.996 GHz, and 3.052 GHz with return loss of - 12.111 dB, - 16.138 dB and - 10.175 dB with 4.035 dB, 3.587 dB, and 3.841 dB of gain, respectively.