Abstract
This manuscript presents a broadband high-efficiency dual-polarized dipole antenna for wireless power and data transfer. The proposed antenna mainly consists of cross-dipole patches, matching baluns, and a ground plane. The dual-polarized radiation mode was achieved by using two linear-polarization matching baluns to feed the cross-dipole patches orthogonally. The proposed dual-polarized dipole antenna realizes a bandwidth with S11 less than −10 dB (4.28 GHz–5.92 GHz) and a high radiation efficiency of about 95%. An independent rectifying circuit was designed, and a microwave energy transmission experiment was carried out. The final measured conversion efficiency for the two polarized ports at 5.8 GHz was about 77.6% and 76.4%, respectively. Simulation and measurement results showed that the proposed antenna is suitable for both wireless power and wireless data transfer applications.
Highlights
Wireless power transmission is a research hotspot in the field of an intelligent Internet of Things (IoT), because microwave wireless energy transmission can transmit power to electronic systems or devices, in some special scenarios where electrical energy cannot be provided via cables [1–4]
The rectifier antenna system has the wireless energy transmission function and requires the wireless data transmission function [17,18]. This manuscript presents a broadband high-efficiency dual-polarized dipole antenna, which consists of cross-dipole patches, matching baluns, and a ground plane
Simulated and measured results demonstrated that the proposed antenna is suitable for both wireless energy transmission and wireless data transmission systems
Summary
Wireless power transmission is a research hotspot in the field of an intelligent Internet of Things (IoT), because microwave wireless energy transmission can transmit power to electronic systems or devices, in some special scenarios where electrical energy cannot be provided via cables [1–4]. There have been many achievements in research into wireless energy transmission systems, mainly focusing on the problem of how to enhance the rectifying efficiency of wireless power transmission. In order to achieve high-efficiency wireless energy transmission, it is necessary to improve the radiation efficiency of the antenna, and to improve the conversion efficiency of the rectifying circuit. Impedance matching between the antenna and the rectifying circuit is needed, to achieve high transmission efficiency in the wireless energy transmission system. The rectifier antenna system has the wireless energy transmission function and requires the wireless data transmission function [17,18] This manuscript presents a broadband high-efficiency dual-polarized dipole antenna, which consists of cross-dipole patches, matching baluns, and a ground plane. Simulated and measured results demonstrated that the proposed antenna is suitable for both wireless energy transmission and wireless data transmission systems
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