Wireless-powered communication network Arriving

Sending power over a wireless network will be a reality really soon!

The lifelong dream from Nikola Tesla of Wireless electrical energy transmission (http://www.teslasociety.com/tesla_tower.htm) is closer to become a reality.



But, harvesting power from RF is a bad idea because of how much power is lost in transmission. instead, they should be harvesting existing power source like light. properly designed systems can be ultra-low power if designed correctly and run on millifarads a day. believe it or not, a solar cell harvesting indoor lighting is enough to power a microprocessor in real time though it would be better to have a MEMS sensor waking up the microprocessor to collect it's latest measurement. the real problem comes in reporting the data back to the hub because RF is a HUGE power hog. you can use it just fine but not very long, so you transmit your collected data and turn off the RF until the next scheduled broadcast.

Some quotes from the source article:

Algorithms that describe the most efficient ways to transmit data and power between wireless sensors and a central hub could help develop large networks of smart devices.

many sensors rely on battery power, which can limit their use. "To change the batteries after a few years of deployment would be problematic,"

One alternative is to build a wireless-powered communication network (WPCN), containing sensors that can harvest energy from the radio waves transmitted by the central hub.

Supercapacitors offer a promising way to store this energy, because they are smaller, and charge more quickly, than rechargeable batteries.

Supercapacitors offer a promising way to store this energy, because they are smaller, and charge more quickly, than rechargeable batteries.

Source: https://www.sciencedaily.com/releases/2016/03/160330182900.htm

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