Analysis of Design of Double Layer Biquad Microstrip Antenna for WLAN Application

Abstract

The design of a double-layer biquad microstrip antenna for WLAN applications aims to develop an antenna with optimal performance at a frequency of 2.4 GHz, which is the main frequency for wireless communication, especially for Wi-Fi networks. The double-layer biquad microstrip antenna is designed with specific dimensions, including biquad sides of 25 mm and 20 mm, and diagonal lengths of 50 mm and 40 mm. The design was carried out using a simulation method to obtain optimal parameters, including return loss, VSWR, gain, bandwidth, and radiation pattern. The simulation results show that this antenna has a return loss of -21.1 dB, VSWR of 1.19, gain of 5.82 dB, bandwidth of 95.4 MHz, and unidirectional radiation pattern at a frequency of 2.4 GHz. After fabrication, the measurement results using VNA showed an increase in performance with a return loss of -30.62 dB and VSWR of 1.06, and a gain of 5.82 dB. This antenna also shows better connection quality, with a two-fold improvement compared to the single-layer antenna. Thus, this double-layer biquad microstrip antenna is very suitable for WLAN applications, providing higher efficiency and better connection stability at 2.4 GHz.