DGS based Multiband Frequency Reconfigurable Antenna for Wireless Applications

Multiband frequency reconfigurable antenna with defected ground structure for Multi-standard wireless communication systems is presented in this paper. The ground plane is modified by embedding U shaped slots with open ends and I shape slot in short ends to realize the multiband frequency of the antenna and to improve the parameters of the antenna design. The two U shape slots are etched symmetrical to each other to reduce the cross polarization of the antenna. Three PIN diodes are inserted in the ground plane to acquire the switching characteristics of multi- resonance frequency. Simulated and measured output clearly depict that the proposed antenna efficient to change between twelve dissimilar resonant frequency bands centered at 1.36, 1.8, 3.0, 3.9, 5.0, 6.2, 6.4, 7.4, 7.9, 8.2, 8.4, 8.6 GHz through different states of modes over the frequency spectrum from 1.33 GHz to 8.7 GHz. The various antenna parameters are simulated using Ansoft HFSS 17.0v. The proposed FRDGS antenna finds application in various wireless communication systems such as Wi-Fi (5GHz), WLAN (5GHz), Wi-MAX, UWB (3.1-10.6GHz) system, fixed mobile and satellite communication systems.