How come wireless power transfer (WPT) is still not being used to power our cell phones?

[HoustonRealtor]

Nicola Tesla made so many experiments on how to transmit power wirelessly. Experiments were successful but not utilized. If we can use wireless frequencies to transmit data, then we defiantly can also use the same wireless frequencies to transmit power. Some companies such as uBeam use ultrasound waves which didn't seem to be working very well. They say energy could neither be created nor destroyed but it can be converted to other forms of energy and be reused over and over again. Cell phones could simply have a receiver such as a power-harvesting circuit that can be designed to absorb the wireless energy not just as a data receiver but as a power receiver to the phone.

 

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[Hong_Kong]

Nicola Tesla made so many experiments on how to transmit power wirelessly. Experiments were successful but not utilized. If we can use wireless frequencies to transmit data, then we defiantly can also use the same wireless frequencies to transmit power. Some companies such as uBeam use ultrasound waves which didn't seem to be working very well. They say energy could neither be created nor destroyed but it can be converted to other forms of energy and be reused over and over again. Cell phones could simply have a receiver such as a power-harvesting circuit that can be designed to absorb the wireless energy not just as a data receiver but as a power receiver to the phone.

• The energy transmitted dissipates rapidly as distance is increased. Example: If you double the distance, you get 64 times less power.
• Also the economic loss of having to charge your phone once a day or so is not that much. Its probably better from an R&D perspective to invest into improved battery technology.
• You need large electric fields around you, large antennas, etc.

Example of a wireless power transfer that is used in industry currently would be something like an RFID tag.

 

[HoustonRealtor]

• The energy transmitted dissipates rapidly as distance is increased. Example: If you double the distance, you get 64 times less power.
• Also the economic loss of having to charge your phone once a day or so is not that much. Its probably better from an R&D perspective to invest into improved battery technology.
• You need large electric fields around you, large antennas, etc.

Example of a wireless power transfer that is used in industry currently would be something like an RFID tag.

Thank you for the feedback. Do you think the technology is unpopular or unneeded? Carging cell phones is a daily task and the older the phone gets, the lower the battery life. The radio waves are all around us and we are already exposed to a high volume of waves. Why not just figure out a way to harness that limitless power that is literally around us?