Raziskovalci so pred kratkim razvili novo metapovršinsko{0}}anteno, ki predstavlja pomemben korak k cilju pridobivanja energije iz radijskih valov. S to tehnologijo lahko uporabniki zagotavljajo brezžično napajanje senzorjem, LED diodam in drugim preprostim napravam z nizkimi energetskimi zahtevami prek radijskih valov, ki jih trenutno uporabljajo Wi-Fi, prenos Bluetooth itd.
"By eliminating wired connections and batteries, these antennas can help reduce costs, improve reliability, and make some electrical systems more efficient," said research team leader Jiangfeng Zhou from the University of South Florida. "This will help Powering smart home sensors, such as those for temperature, lighting, and motion, or for monitoring the structure of buildings or bridges, where changing batteries may be difficult or impossible."
Rezultati raziskave so bili nedavno objavljeni v Optical Materials Express.
Raziskovalci poročajo, da laboratorijski testi njihove nove antene kažejo, da lahko pridobi 100 mikrovatov energije iz radijskih valov{1} nizke moči, kar je dovolj za napajanje preproste naprave. To je mogoče, ker metamaterial, uporabljen za izdelavo antene, odlično absorbira radijske valove in je zasnovan za delovanje pri nizki intenzivnosti.
"While more work is needed to miniaturize the antenna, our device uses ambient power levels found in the real world at high The efficiency crosses the critical threshold of 100 microwatts of harvested power. The technology can also be tuned so that it can provide a source of radio waves to power or charge devices around the room."
Znanstveniki že nekaj časa poskušajo pridobiti energijo iz radijskih valov, vendar so se trudili dobiti dovolj energije za delovanje. To stanje se spreminja zaradi razvoja metamaterialov in vedno-večjih virov razpoložljive radiofrekvenčne energije v okolju, kot so omrežja mobilnih telefonov, signali Wi-Fi, GPS in Bluetooth.
Zhou said: "With the huge explosion of radio wave-based technologies, there will be a large amount of waste electromagnetic radiation that can be collected. This, coupled with advances in metamaterials, creates a ripe environment for new devices and applications, These devices and applications can benefit from capturing this waste energy and putting it to use."
