Gain Enhancement of Flexible Power Transfer Antenna using Frequency Compensation

Abstract

This research is on an antenna gain enhancement of a flexible antenna for electromagnetic wave based power transfer system. Especially, it is about the change of the center frequency and the compensation method when the flexible antenna is bent. For this purpose, a patch antenna was designed using Polydimethylsiloxane(PDMS), which is a representative flexible substrate, and the variation of center frequency according to the degree of bending was measured. As a result, it was confirmed that when the antenna is bent outward, the inductance increases and the center frequency increases. To improve this, a capacitor was added to compensate the frequency. In conclusion, we could compensate the shifted frequency with the initial center frequency and improve the antenna gain up to 1.7dBi.