A Wide-beamwidth Dual-band L-probe Fed Antenna with Parasitic Posts for 5G Communication

A single-fed dual-band L-probe fed antenna for 5G applications is presented. The proposed antenna is designed to operate as a dual-band radiator by utilizing the L-shaped probe and stacked patches, and the center of two bands is 28 GHz and 39 GHz, respectively. This antenna features wide-beam at H-plane and wideband characteristics. Furthermore, The beamwidth is approximately 140° at 28GHz and over 180° at 39GHz. The total efficiency of the antenna is over 90% in lower band and about 90% in upper band. The dimensions of the proposed antenna structure are
$10\text{mm}\times 10\text{mm}\times 0.9\ \text{mm}$
. The simulation results show the antenna has good impedance and radiation characteristics, which make it suitable for 5G millimeter-wave communication.