Transmission Efficiency Analysis of Different Patch Antenna Design Configuration in Various Distance for Wireless Power Transfer

Abstract

Wireless Power Transfer (WPT) is gaining popularity due to its potential use in charging portable electronic devices without cables, such as laptop computers, mobile phones, and other portable electronic devices. Nowadays, WPT uses microwave antennas to transfer power through the airspace. In the WPT system, direct current is converted into microwave radiation and sent from a transmitter antenna to a reception antenna. This project aims to design several different patch antennas and generate a frequency at 900MHz using CST studio to analyze the power transmission efficiency at various distances, from 1 cm to 12 cm. Another objective is to compare the simulated power transmission efficiency results from several design antennas. Three types of microstrip patch antenna have been designed: square microstrip patch antenna with inset, rectangular microstrip patch antenna with inset, and square microstrip patch antenna with a slot. The antenna design was assumed to be a transmitter and receiver antenna with a distance of 1 cm to 12 cm and simulated to analyze the power transmission efficiency. The best performance of power transmission efficiency is the rectangular microstrip patch antenna with inset, which at the minimum distance of 3 cm is 29.51% (-5.299 dB), and the maximum distance of 15 cm is 2.64% (-15.781 dB). In conclusion, the power transmission efficiency will increase when the receiver antenna is near the transmitter antenna. If the receiver antenna is far from the transmitter antenna, the power transmission efficiency will decrease in this experiment. It depends on the performance of a design antenna to receive power from the transmitter antenna.