Design and Analysis of a Compact Triple Band Slotted Microstrip Antenna with Modified Ground Plane for Wireless Communication Applications

A novel single layer, coaxial probe feed compact triple band slotted microstrip patch antenna with modified ground plane for wireless application has been designed and analyzed. The presented antenna, occupying a compact size of 24 × 22 × 1.6mm3, embodies a rectangular slotted patch and a rectangular ground plane modified with open ended step graded slots. The step graded slots are introduced on the ground plane to reduce the size of the antenna by reducing the resonant frequency and also to improve the operating bandwidth of the proposed antenna. The size of the antenna has been reduced by 74% by introducing slots on the ground plane. The measured bandwidths for −10 dB reflection coefficient are 360MHz (1.72–2.08GHz) at lower band, 300MHz (3.36–3.66GHz) at middle band and 3650 MHz (4.85–8.5 GHz) at upper band which cover the bandwidth requirements of 1.92GHz PCS, 1.9 GHz PHS, 3.5/5.5GHz WiMAX, 5.2/5.8GHz WLAN, 5.2 GHz HisWaNa and 5 GHz HiPERLAN wireless application bands.