Antenna Gain Improvement for Wi-Fi Applications Using Parasitic Patch

Recent research has focused on enhancing the performance of microstrip antennas, particularly in terms of their gain and bandwidth. In this paper, a rectangular microstrip patch antenna with enhanced gain is designed using HFSS software. The designed antenna has a resonance frequency of 2.4 GHz, making it suitable for Wi-Fi application. The substrate chosen for designing the proposed MPA is FR4_epoxy with dielectric constant of 4.4. To improve the gain performance of the proposed antenna, a pair of parasitic patches and 0.2 mm reduction in the size along the length of the ground plane with respect to the substrate are considered during the designing of the antenna. The simulation results revealed that the antenna's gain was increased from 2.4 dB (basic antenna) to 9.2 dB, while the frequency remained unchanged at 2.4 GHz. The results of the simulation are presented and broken down into categories such as gain, VSWR, S11, and co and cross pole polarization. The findings clearly demonstrate that the proposed design possesses beneficial characteristics that are appropriate for use in Wi-Fi applications. © 2022, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.