Tesla work on WPT first! He invent radio-communication neverteless that Markony and Popov were more known. About cost-efficient method-this is different for different situations!

Of course...a widespread horizon open for aspirants to search-research and explore.

I am highly interested to contribute something as for wireless .. medium.. transmission ...reception methodology, technology, technique optimization is concerned::: welcome to all noble contributors / aspirants

It requires "power" to steer the wireless beam. So the efficiency would be always lesser. However, if the transmitter is up in the sky and using uninterrupted solar radiation and beaming a pencil beam to the earth, then it is fantastic!

We need to talk to Sunita Williams to install this from the space station and comedown!

Georgi Mladenov , Tesla proved a concept for WPT but the application for WPT is proved by PIT (USA).

Georgi Mladenov , Tesla proved a concept for WPT but the application for WPT is proved by MIT (USA)

Dr Imayaavaramban Munuswamy! Tesla workson transfere of high frequency power; invent radio(before Markoni). There are many attempt before MIT to translate power without wires-you can see some papers from NASA, power translation with microwave beam and laser bean, for example.

Dr. Georgi, Yes I accept. What is the use? Why WPT is not yet developed commericially? Who initiated the WPT for commercial? For example, Please see the website WiTricity, http://www.witricity.com/pages/technology.html. see who brought WPT into the market. If you need more information, please let me know. Thanks for your response.

Dear Dr. Imayavaramban, Thank you for Internet page and information. From my side I recomend yoy to see

en.wikipedia.org/wiki/contactless_energy_transfer

where have information and the last paragraph is:

Timeline of wireless power!

Thanks for good question and responce. I try to direct a my doctorant student on rectenna research, but he very slowly go in this direction

Dear Dr Georgi Mladenov, Thanks for your encouragement. Great, nice to hear from you.

Honestly I don't understand why WPT is required for EV, cellphones or other applications like those. I think just where we cannot use wires, WPT should be brought into play. The most reasonable application so far is medical implants in which inductive WPT is widely used since two decades ago.

Thanks for your response Iman Ghotbi. As we are professionals we have to use/develop the technology end with commercial products. We should not think that Why this technology is required for this application or other applications. For example, I will explain Why WPT is required for EV? Assume EV Bus using WPT to get enough charge to reach destination in this case we save more time if you use WPT. How? EV Bus doesnt require a specific time to charge because EV Bus has planned stops in the BUS Stand and it may stop more than 2 minutes during this minutes we can recharge EV Bus. For cell phones, you dont look for socket or charger when you enter into the room you can turn on charging mode and it will be charged quickly. Time saving and Cost savings because WPT requires only one time investment. If you need more information, please refer this link, http://www.witricity.com/pages/technology.html.