Abstract
A two-channel frequency reconfigurable rectenna that can perform microwave power transmission (MPT) and data communication simultaneously are proposed in this paper. The rectenna contains a low/medium power rectifying circuit and a two-port frequency reconfigurable dipole antenna, which provides one channel for MPT and one for data communication. A p-i-n diode switch installed on the feeding network is used to control the operating frequency of the antenna, enabling the two channels to work either in a different or in a common frequency band. By adopting a defected ground structure, good isolation ( $S_{12}$ or $S_{21} dB) between the two channels is achieved. The rectifying circuit is investigated through simulation and measurement, and the simulated and measured Radio Frequency (RF)-Direct Current (DC) conversion efficiencies achieve maximum values of 51.73% and 50.18%, respectively. In addition, the power division between the two ports is considered, and the DC output power pattern of the rectenna is presented. This can be used to evaluate the optimum incident wave direction for a maximum DC output power. The results show that the rectenna has a good performance in both MPT and data communication.
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