The transmission distance of electric wave system is long.
Long-distance electrical transmission is possible for this system.This system excels in long-distance transmission compared with other systems.
The feature of the microwave which is a kind of an electric wave is related.
The wavelength of microwave is 1cm ~ 10cm.
Microwave has the characteristic which goes straight on.
The problem and Measure of transmission or reception
A setup of the transmitting direction is a problem.Gap of the transmitting side affects a receiving side greatly.
It is necessary to fix both.
But...
The power transmission side is fixable.
A receiving side cannot necessarily be fixed.
The electric wave for communication is used.
A communication wave pinpoints a position.
A setup of the transmitting direction is designed the power transmission side to transmit microwave towards there.
The method of raising accuracy by Pinpointing a position is called retro directive system.
This system is concerned with the system of electric wave.
Transmission and a receiver machine
The transmitting side has the function to change electricity into microwave.Moreover, there is a function to fly microwave.
The antenna of a different form is used for a receiver machine.
Useless electric power occurs in the transmitting side.
This is not avoided.
It is a subject of this field.
The wavelength of microwave is related to the form of an antenna.
Influence on a human body and environment0
It actually has almost no influence.We focus on influence of microwave.
Microwave does not have a direct effect to a human body and environment.
The microwave of a microwave oven generates heat.
But,heat does not occur in wireless electric supply.
Since the microwave of safe strength is used, it is safe.
【Reference】
ウェブリオ「マイクロ波」
www.weblio.jp/content/マイクロ波
「マルチメディア・インターネット辞典」Dictionary of MultiMedia
http://www.jiten.com/dicmi/docs/k31/22647s.htm
電磁波についての参考サイト
http://homepage3.nifty.com/~bemsj/startCorce.htm
