High-Gain Rectangular Patch Microstrip Antenna for IEEE 802.11 b/g Applications

Abstract

Increasing demand for microstrip patch antennas, especially in microwave applications, due to its compactness, ease of fabrication, low cost, etc. gives rise to the research studies on the related area. In this study, rectangular shaped microstrip patch antenna is designed and simulated for Bluetooth applications. The antenna consists of rectangular shaped patch that is loaded with rectangular slots with different lengths, FR-4 substrate with 1.6 mm thickness and ground with reduced length. The designed antenna is simulated using CST MWS software to investigate S11, gain, VSWR parameters. Microstrip line feeding technique with discrete port is used to feed the antenna. According to the results, lower and higher frequency bands of the antenna are 2.24 GHz – 2.62 GHz with 2.48 GHz center frequency (15.3% bandwidth) and 5.80 GHz – 5.99 GHz with 5.90 GHz center frequency (3.22% bandwidth), respectively. Gain values at 2.4 GHz, 2.5 GHz and 5.9 GHz frequencies can be given as 3.45 dBi, 3.58 dBi and 4.93 dBi, respectively. S11 values at 2.4 GHz, 2.5 GHz and 5.9 GHz frequency bands are -16.64 dB, -18.00 dB and -15.11 dB. VSWR values of the antenna for 2.4 GHz, 2.5 GHz and 5.9 GHz can be given as, 1.35, 1.29 and 1.43 respectively. As a result, the proposed antenna has high gain and wide low frequency band. It can be used for Bluetooth/ Wi-Fi applications and IEEE 802.11 b/g standards are also supported by the antenna.