A Comparative Review of Wideband Microstrip Antenna Designs for Modern Wireless Communication Systems

Abstract

Many modern wireless systems need antennas that work across many frequencies. GPS needs 1.15 GHz to 1.6 GHz. WiFi and WiMax need 2.3 GHz to 6 GHz. Normal microstrip patch antennas are small and cheap but they work only on a narrow band. This review paper looks at two different ways to make microstrip antennas wideband. The first method uses a square patch with cut corners and capacitive feeding [1]. It gives circular polarization from 1.15 to 1.6 GHz. The second method uses a circular patch with a CPW feed line [2]. It gives linear polarization from 2.3 to 6 GHz. Both designs use FR4 board. This paper compares their shape, feeding, polarization, bandwidth, gain, and radiation. The final conclusion is simple: use the first design for GPS and satellite. Use the second design for WiFi and WiMax.