WRIGLEY: Pokud se nepletu, tak Antenna Gain musi bejt tak 18 dBi, aby to davalo pri 23 dBm 4 watty. Takze pri ucinnost anteny 40% (coz by tak nejak mohlo bejt pri tech 900 Mhz) by jeji prumer musel bejt 1.3 metru. Ale vsechno to je takovy vodhadovany, kdyby byla ucinnost 100%, staci prumer 80 cisel. Ale nejsem radioexpert, pravdepodobne me nekdo opravi.

Chápu, že to už není moc vtip, ale nachází se tu někdo, kdo by dokazal spočítat el. spotřebu toho vysílače?

A WattUp™-enabled system uses a multiple input, multiple output (MIMO) transmitter that sends up to 23 dBm across a 120-degree directional span, creating a 3D pocket of energy using the 900MHz (5.7-5.8GHz) RF spectrum.  

The power router scans the local environment with low power beams in order to determine in which directions to form beams to a particular receiver. These beams include reflected beams from walls, ceiling, floor, furniture and other inanimate objects in the vicinity. The collective converging paths of all the beams deliver the energy to the receiving device’s antennas.  

WattUp™ software ensures that this occurs in the area that has the largest part of the converged energy (the “energy pocket”).  For multiple receivers, the system repeats the environment scan to identify all possible and registered receivers and directs the power router’s antennas to form multiple energy pockets, each of which can power a receiver device anywhere within a 15-foot radius.

The system delivers an average of 2W to 4 devices simultaneously within this 15-foot radius (30 foot span).  Proximity to the transmitter impacts power delivery as follows:

4W delivered to 4 devices simultaneously within 0-5 feet
2W delivered to 4 devices simultaneously within 5-10 feet
1W delivered to 4 devices simultaneously within 10-15 feet
Charging times will vary since they are determined by the number of devices being charged as well as the allocation of available power to each device.  WattUp™ software allows allocation of power to as many as 12 devices in ¼W increments.

DARMONLOR: "with over 1000 years of collective technology experience"

Omlouvám se, ještě trochu lepší zdroj o co se vlastně jedná (zabudování vysílačů WhattUp do spotřebičů) http://www.energous.com/...nt-with-energous-corporation-to-accelerate-industrialization-application/

ZCR: ráda bych si skusila nějaký pokusy na lidech :) GAČR se to asi líbit nebude, ale když to udělám za svý...

RAGUPKI: OK, mír :-) To víš, chtěl jsem si to vyzkoušet. Je to děsná prča.