The Next-Generation Over-the-Air Wireless Charging for Public Places

Wireless charging is already being used in public places like restaurants, cafes, libraries, airports and hotels to keep our phones powered up and stay connected, without the need to keep looking for power outlets or the need to carry the power cords. The users are ultimately enjoying a convenient and hassle-free experience with the deployment of these charging pads.

The next evolution in wireless charging systems for public places is Over-the-Air charging. Such systems will allow long-range charging for multiple devices simultaneously with full room coverage.  This implies that we can charge our smartphones, laptops, smartwatches, ipads, smart speakers, consoles, etc., at the same time without having to be plugged in. Imagine devices which charge on the go, and will never die again! There will be a time when we sit in the car and the devices start getting charged automatically.

How does it work?

In simple language, there is a transmitter that is linked to a power source and it delivers power to the receivers embedded with the supported chips. The designed technology provides charging upto a particular distance. The delivered power could be through invisible infrared light or RF energy waves.  These systems include multiple solutions related to RF, analog, digital, software and power management.

However, few of the challenges associated with this concept are listed below:

  • Concerns related to risk to human health
  • Engineering challenges related to system interference
  • Cost-effective solutions will be required to build an ecosystem
  • RF-strength related concerns as the receiver moves away from the transmitter

Few Active Entities:

Looking Ahead

Though the present solutions are not ‘truly wireless’ and might take around 10 years to be deployed in full-wing with all the required ecosystem development. This solution is crucial and will open door to many emerging applications including autonomous systems, drones, smart cities, medical systems, virtual and augmented reality, etc.

Sources: Energous, Powercast Corporation, Wi-Charge