Design and Study of a Bi-Band Antenna for WLAN and WiMAX Applications

This paper presents the design of a dual-band microstrip patch antenna tailored for WLAN and WiMAX applications. The proposed compact antenna, featuring slits and slots, operates at three distinct frequencies: 3.45 GHz, 4.99 GHz, and 5.72 GHz. It achieves a return loss superior to -20dB at each of these frequencies, covering the lower band (3.38-3.54 GHz), and the upper band (4.76-6.38 GHz). The antenna exhibits bandwidths of 160 MHz, and 1620 MHz, for the respective bands, with VSWR values below 1.2, Constructed from FR4 material with a relative permittivity of 4.4 and a thickness of 1.6 mm, the antenna is fed using a microstrip feedline technique with a 50Ω impedance. The design and performance analyses are conducted using CST Microwave Studio software.