Editing Wireless power transfer (section)

== Energy harvesting ==
{{main|Energy harvesting}}

In the context of wireless power, ''[[energy harvesting]]'', also called ''power harvesting'' or ''energy scavenging'', is the conversion of ambient energy from the environment to electric power, mainly to power small autonomous wireless electronic devices.<ref name="Beeby">{{cite book |last1=Beeby |first1=Stephen |last2=White |first2=Neil |title=Energy Harvesting for Autonomous Systems |publisher=Artech House |date=2010 |pages=1–2 |url=https://books.google.com/books?id=7H9xdFd4sikC&q=%22energy+harvesting%22&pg=PA1 |isbn=978-1596937192}}</ref> The ambient energy may come from stray electric or magnetic fields or radio waves from nearby electrical equipment, light, [[thermal energy]] (heat), or [[kinetic energy]] such as vibration or motion of the device.<ref name="Beeby" /> Although the efficiency of conversion is usually low and the power gathered often minuscule (milliwatts or microwatts),<ref name="Beeby" /> it can be adequate to run or recharge small micropower wireless devices such as [[remote sensor]]s, which are proliferating in many fields.<ref name="Beeby" /> This new technology is being developed to eliminate the need for battery replacement or charging of such wireless devices, allowing them to operate completely autonomously.<ref>{{cite book |doi=10.1145/2486001.2486015 |chapter=Ambient backscatter |title=Proceedings of the ACM SIGCOMM 2013 conference on SIGCOMM |year=2013 |last1=Liu |first1=Vincent |last2=Parks |first2=Aaron |last3=Talla |first3=Vamsi |last4=Gollakota |first4=Shyamnath |last5=Wetherall |first5=David |last6=Smith |first6=Joshua R. |pages=39–50 |isbn=9781450320566 |s2cid=6730636}}</ref><ref>{{cite journal |last1=Kang |first1=X. |last2=Ho |first2=C. K. |last3=Sun |first3=S. |title=Full-Duplex Wireless-Powered Communication Network With Energy Causality |journal=IEEE Transactions on Wireless Communications |date=October 2015 |volume=14 |issue=10 |pages=5539–5551 |doi=10.1109/TWC.2015.2439673 |arxiv=1404.0471 |s2cid=2445116}}</ref>