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A new smart home IoT platform powered using electromagnetic energy harvesting is proposed in this paper. It contains a high gain transmitted antenna array and efficient circularly polarized array rectenna system to harvest enough power from any direction to increase lifetime of the batteries used in the IoT system. Optimized energy consumption, the software with adopting the Zigbee protocol of the sensor node, and a low-power microcontroller are used to operate in lower power modes. The proposed system has an 84.6-day lifetime which is approximately 10 times the lifetime for a similar system. On the other hand, the proposed power management circuit is operated at 0.3\u2009V DC to boost the voltage to ~3.7\u2009V from radio frequency energy harvesting and manage battery level to increase the battery lifetime. A predictive indoor environment monitoring system is designed based on a novel hybrid system to provide a nonstatic plan, approve energy consumption, and avoid failure of sensor nodes in a smart home.<\/jats:p>","DOI":"10.1155\/2020\/8828479","type":"journal-article","created":{"date-parts":[[2020,12,1]],"date-time":"2020-12-01T15:09:45Z","timestamp":1606835385000},"page":"1-14","source":"Crossref","is-referenced-by-count":23,"title":["Smart Home IoT System by Using RF Energy Harvesting"],"prefix":"10.1155","volume":"2020","author":[{"given":"Nermeen A.","family":"Eltresy","sequence":"first","affiliation":[{"name":"Electronics Research Institute (ERI), Giza 12622, Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7241-6986","authenticated-orcid":true,"given":"Osama M.","family":"Dardeer","sequence":"additional","affiliation":[{"name":"Electronics Research Institute (ERI), Giza 12622, 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