Probe-Compensation-Fed Wideband Microstrip Antenna with U-Shaped Parasitic Elements for 5G/WLAN/WiMAX Applications

摘要

A single layer and single capacitive probecompensation fed wideband patch antenna for 5G/WLAN/WiMAX applications, is presented and investigated. Two identical U-shaped parasitic patches are incorporated around the radiating edges and non-radiating edges of a rectangular patch. In order to maintain relatively small antenna size, the length and width of this rectangular patch is ?λg and ?λg, respectively. An annular gap is etched in the rectangular patch, which is concentric with the fed-probe. This annular gap can introduce an annular gap capacitor to compensate the inductance caused by the fed-probe. An additional resonant frequency is introduced by the V-shaped parasitic patches, which incorporates with the original resonant frequency produced by the rectangular patch, thus the wideband performance is achieved. The simulated impedance bandwidth with S11≤-10dB is 40% from 4.1GHz to 6.16 GHz, which covers 4.8-4.99GHz band of 5G operating in China, WLAN 5.2GHz(5.15-5.35GHz), WLAN 5.8GHz(5.725-5.825GHz), WiMAX 5.5GHz(5.25-5.85GHz). The simulated gains are 7.8dB at 4.34GHz and 4.6dB at 5.89GHz, respectively.