A novel dual band square patch antenna with better isolation and low correlation

This paper presents a simple compact square patch dual band Multiple Input Multiple Output (MIMO) antenna for wireless terminal devices. The antenna designed to operate in the frequency bands of 1.78-2.74 GHz and 3.33-6.06 GHz that covers LTE, Bluetooth, WiMAX and WLAN applications. The antenna consists of two concentric square ring slots etched on the corner truncated square patch monopole radiator to improve the bandwidth and isolation. Simulated results ensure that the proposed antenna operates in the dual bands such as 1.78-2.74 GHz and 3.33-6.06 GHz with -10dB impedance bandwidth. This square patch antenna provides better than 15 dB isolation and less than 10 dB TARC for the entire band and also attained a minimum correlation of 0.005. The proposed MIMO antenna is designed on FR-4 substrate with a size of 0.818 λ × 0.783 λ × 0.0115 λ. The EM simulation of proposed antenna is carried out Ansoft's High Frequency Structure Simulator (HFSS).