A Novel Quartz Clock With Integrated Wireless Energy Harvesting and Sensing Functions

Chaoyun Song, Ana Lopez-Yela, Yi Huang, Daniel Segovia-Vargas, Yuan Zhuang, Yansong Wang, Jiafeng Zhou

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)


There has been an increasing demand for smart devices and smart furniture for home automation, monitoring, and security applications. In this paper, we present a novel method of integrating the function of wireless energy harvesting from ambient RF signals to a conventional quartz clock for home applications. The most attractive feature is that the clock itself is used as the power receiving device, thus no additional antennas are needed. A simple rectifier is designed to directly match with the clock antenna and rectify the power captured by the clock. As a design example, a clock rectenna using the proposed new idea achieves good energy conversion efficiency (up to 65%) over its operating frequency bands at around 1.4-1.5, 1.9-2.1, and 2.4-2.8 GHz, respectively. Moreover, a wireless environmental sensor is integrated with the clock and powered by using the harvested power from the proposed clock rectenna. This novel design greatly expands the functionality of the quartz clock without affecting its size and appearance. We believe that the proposed energy harvesting quartz clock could be adopted for smart home applications.
Original languageEnglish
Pages (from-to)4042-4053
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number5
Early online date13 Jun 2018
Publication statusPublished - May 2019


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