As more communication is provided wirelessly, the applications and the devices they operate within still need to be truly portable, primarily due to the power requirement limitations and the ongoing need to regularly connect them to a wired AC outlet to recharge them.
Wireless power transmission: Enabling your innovation
Wireless Power Transmission, or WPT, is the transmission of electrical energy to the device without wires. WPT technology is useful to power electrical devices where interconnecting wires are inconvenient, hazardous, or even not possible, and as such, can be used to eliminate the use of cables and batteries, thus increasing the mobility, convenience, and safety of any electronic device for all of its users.
Wireless power transmission methods
WPT technology has been around for many years. Still, it is only recently that the technology has improved and miniaturized to the point where it can be embedded into the smallest devices. With a global initiative to provide more electric vehicles comes a need for more convenient ways of charging these vehicles – aka Wireless power transmission.
Wireless power transmission techniques mainly fall into two categories, near field and far field.
Near-field wireless power transmission (WPT) technique
Inductive coupling is the most widely used wireless technology in near-field applications; its applications include charging handheld devices like phones and electric toothbrushes, RFID tags, induction cooking, and wirelessly charging or continuous wireless power transmission in implantable medical devices like artificial cardiac pacemakers or electric vehicles.
Far-field wireless power transmission (WPT) technique
In far-field long, distance or radiative techniques, power is transferred by beams of electromagnetic radiation, like microwaves or laser beams; its applications include solar power satellites and wireless-powered drone aircraft.
Compliance requirements for wireless power transmission
An important issue with all wireless power transmission techniques and their associated systems is limiting the exposure of people and other living things to potentially injurio