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In this paper, a comparative study on different types of Rectenna array used for microwave power transfer (MPT) has been presented. Rectenna, which consist of an antenna combined with a rectifier, is an important part of microwave power transfer system. The antenna captures the microwave radiations from the atmosphere and these radiations are converted into a DC output value by the rectifying circuit. Thus, Rectenna converts the microwave radiations into useful electricity. Later, the output DC value from the rectifier will be able to charge portable low power electronic devices such as sensors, mobile, etc. Different antenna array configurations based on the shape of their patch, the number of patches, dielectric constant, etc have been compared. Various parameters such as the antenna type, frequency, rectifier type, maximum efficiency, gain, input power and the output voltage of different rectenna array types are analyzed and their performance is studied. Keywords—Rectenna; antenna; rectifier; conversion efficiency; output voltage; Schottky diode.

A Review on Novel Designs for Microwave Power Transmission using Rectenna Array