Compact Tri Band Frequency Reconfigurable L-Slot Octagonal Shape Patch Antenna

Abstract

A frequency reconfigurable octagonal shaped patch antenna is designed and its properties are studied. In this paper, a micro strip patch antenna. In this antenna design patch of the antenna is separated into three parts by cutting the open ended L-slot on the both side of the patch. Here four PIN diodes are used for the operation. When the diode D1 and D3 is on than the antenna works on the frequency 4.6688 GHz, 7.8864 GHz and 10.662 GHz while the D2 and D4 is on state than this antenna works for the 5.1893 GHz, 8.2492 GHz and 11.467 GHz. This compact size antenna with the dimensions of the 25 × 28 mm2 is design on the FR-4 substrate of the thickness h = 0.8 mm and the dielectric constant of this material is 4.4.