Design of Multiband Circular Patch Antenna for Wireless Applications

Research Paper

Design of Multiband Circular Patch Antenna for Wireless Applications

Suneel E*, Prabhakara Rao B.**

* Research Scholar, ECE Department, JNTUK, Kakinada, Andhra Pradesh, India.

** Professor of ECE (Rtd), Programme Director, School of nanotechnology, IST, JNTUK, Kakinada, Andhra Pradesh, India.

Suneel , E ., & Rao, B., P.(2019). Design of Multiband Circular Patch Antenna for Wireless Applications. i-manager’s Journal on Wireless Communication Networks, 7(4), 11-18. https://doi.org/10.26634/jwcn.7.4.15828

Abstract

A simple circular patch antenna with notch ground and arc patch is proposed in this paper. Antenna is fed with Coplanar Waveguide (CPW) feed. In this CPW feed ground exists only on top of the substrate and either side of the feed strip. Ground is notched at either top corner to achieve multiband frequency. A small arc gap is created between the feed strip which is attached to arc patch and the circular radiating patch known as capacitive loading to achieve WLAN 5.2/5.8GHz band. Antenna is fabricated on FR4 substrate having dimension (40mmx30mmx1.6mm).Relative dielectric constant of the substrate is 4.4. The proposed antenna covers multiple frequency bands with impedance bandwidth (S11 < −10dB) of 20.4% from 2.2-2.7 GHz, 61% from 4.1-7.7 GHz, and 25.5% from 8.9-11.5 GHz. These operating bands are suitable for 2.4GHz / 5.2GHz / 5.8GHz Wireless local area network (WLAN) bands and X-band applications. Effects of key design parameters such as radius of the patch and length and width of arc have been investigated. Return loss, VSWR, Radiation pattern and gain characteristics of the antenna are investigated. Antenna exhibits positive gain and good radiation characteristics over these frequency ranges. There is a good agreement between the measured and simulation results