A CPW Fed Compact Multiband Antenna For Wireless Applications

Abstract

This paper presents a coplanar waveguide fed microstrip antenna developed with the aim of providing multiband resonance with compact & simple structure. The CPW fed antenna is of size $18.2\times 20\text{mm}^{2}$ which is printed on the substrate (FR4- Epoxy) which has relative permittivity 4.4 and thickness of 1.6mm. The proposed antenna has a meander line structure and a rectangular slot along with L-shaped slots on the ground plane. The meander line structure is responsible for resonance at 2.62 GHz, the rectangular slot gives resonance at 5.37 GHz and the L-shaped slots are responsible for resonance at 4.43 GHz & 7.3 GHz. The proposed antenna has return loss greater than −10dB and shows good bandwidth characteristics at all four resonant frequencies. The proposed antenna has peak gain of 0.133dB/2.7dB/3.4dB/4.33dB at 2.622/4.43/5.37/7.3GHz frequencies respectively. The proposed antenna can be used for WLAN, WIFI, Narrowband & X-band applications.