Four-Element CPW-Fed Uwb Mimo Slot Antenna With High Isolation and Triple Band-Notched Characteristics

Abstract

A novel 4-element UWB MIMO (multiple-input multiple-output) slot antenna with triple band-notched characteristics is designed and fabricated. It is composed of four rectangular slot antennas with two C-slots and a T-slot. To improve the isolation, cross-shaped branches are added. The measured results demonstrate that the antenna can operate ranging 2.51-11.07 GHz with the impedance bandwidth (S 11 < −10 dB) of 856 MHz except three rejected bands, including 3.02-4.07 GHz, 4.54-5.83 GHz, and 7.88-9.38 GHz, and the inter-element isolation of antenna in the range of UWB band is higher than 21 dB. The presented antenna can filter the interference of WiMAX (3.3-3.7 GHz), WLAN (5.15-5.825 GHz) and X-band (7.9-8.4 GHz). Moreover, the parameters of diversity performance like envelope correlation coefficient (ECC), diversity gain (DG), efficiency, gain, channel capacity loss (CCL), mean effective gain (MEG), and total active reflection coefficient (TARC) have been analyzed. Based on the analysis on simulated and measured results, the proposed MIMO antenna is competent for UWB applications with notched bands for WiMAX, WLAN and X-band.

A Flexible UWB Slot Antenna with Quad Band-notched Characteristics for Wearable Application

“…Such an antenna must not only exhibit high radiation efficiency, but also accommodate the wide UWB bandwidth. Recently, UWB antennas with bands rejection characteristics have been proposed, which can prevent interference with other narrowband services, such as telemetry/mobile communications, WLAN and ITU bands [2][3][4][5][6][7][8][9][10][11][12][13]. Wearable UWB technology has garnered significant attention for its transformative potential in communication [14][15][16], health monitoring, and medical applications [17].…”