H – Shaped MSA and Modified Square WMSA With Slot Loaded Finite Ground

Abstract

A compact size, high bandwidth H-shaped microstrip patch antenna design with promising efficiency for wireless applications, operating at a particular frequency 3.5GHz has been proposed. A H - Shaped Micro Strip Antenna (MSA) with ground plane connected, improves the bandwidth to an appreciable 21.27 % in the frequency range of 3-4 GHz whereas with the same design parameters the simple microstrip patch antenna design conventionally gives very low bandwidth (from 2-4 %).

Another Modified square compact Wideband Micro Strip Antenna (WMSA) having slot loaded finite ground is also proposed in this paper for dual band operation. Dual band modified square microstrip patch antenna with wideband is achieved by corner cut and inserting slits inside the edges of the radiating patch having slot loaded finite ground plane. It is observed that two operating frequencies at 3.16 and 4.21 GHz can be obtained. The obtained impedance bandwidth for 10 dB return loss for these operating frequencies are 14.24 % and 28.74 % respectively. Compactness and dual band operation with wide bandwidth of this antenna with no adverse effect to environment is widely applicable for the wireless communication systems.