Metamaterial inspired reconfigurable fractal monopole antenna for multiband applications

Abstract

The multiband reconfigurable fractal slot antenna which is having Split ring resonator and complementary split ring resonator is proposed in this article. The proposed antenna works at the bands of GPS (1.6GHz), Bluetooth (2.4GHz) and at the middle of the WiMAX bands (5.7GHz). In respect to that, the frequency reconfigurability of the proposed antenna has been tested and analysed by placing PIN diode which is attached to Complimentary Split Ring Resonator (CSRR) at the backside (ground) of the antenna. The switchable characteristics of the antenna are tested using two diodes. When ON condition the switching characteristics are seen in the lower bands such as 1.8GHz (B.W=18%) and WiMAX 3.5GHz band (B.W=20%).during OFF condition the lower frequency band of GPS is converted as the notch band and increase of about 20% B.W has been observed in Bluetooth 2.4GHz and 5.6 UPPER WiMAX bands. The compact antenna of size 35mm*30mm is designed and analysed using ANSYS EM Desktop. The gain and stable radiation patterns with radiation efficiency towards frequency have been observed in the article.