GHz BAW piezoelectric transformers for passive voltage amplification using the epitaxial ZnO thin films

Hiroki Kishi, Shiori Kobayashi, Takahiko Yanagitani

研究成果: Conference article査読

抄録

Energy harvesting using ambient electromagnetic waves is one of the promising battery-less power supply methods for sensors. Electromagnetic waves can be converted to the DC energy by a rectifying antenna (called a rectenna). However, it is difficult to activate the rectifier when the electromagnetic wave is weak. In this study, we report BAW transformers based on the epitaxial ZnO thin films for passive voltage amplification. The theoretical voltage gain was simulated by Mason's equivalent circuit model. S parameters of the BAW piezoelectric transformers are measured by a network analyzer. As a result, the RF voltage increased approximately 4 ×in 600 MHz range. This BAW transformer enables high voltage operation of the diode in the rectenna.

本文言語English
ジャーナルIEEE International Ultrasonics Symposium, IUS
DOI
出版ステータスPublished - 2021
イベント2021 IEEE International Ultrasonics Symposium, IUS 2021 - Virtual, Online, China
継続期間: 2011 9月 112011 9月 16

ASJC Scopus subject areas

  • 音響学および超音波学

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