This fourinch antenna could let you text from deep underground Engadget
Dawn Harmer/SLAC National Accelerator Laboratory There's a reason that scuba divers use sign language and that caves and tunnels create radio useless zones. The laws of physics save you radio alerts from penetrating substances like water, soil and stone, and that is been a irritating difficulty of current wi-fi communique. Now, the Department of Energy's SLAC National Accelerator Laboratory would possibly have an answer: a four-inch-tall, pocket-sized antenna that emits very low frequency (VLF) radiation.
Unlike radio waves, which might be used for radio announces, radar and navigation structures, VLF radiation wavelengths can journey hundreds of miles beyond the horizon and masses of toes via the floor and water. This isn't always the first time VLF radiation has been used to interrupt through bodily barriers. But the new antenna is plenty smaller and will be used to build transmitters which might be only some kilos. That makes it appealing for army rescue and defense missions.
The SLAC-led crew shared its paintings in Nature Communications today. According to SLAC, in checks, the brand new antenna produced VLF radiation 300 times greater successfully than preceding compact antennas and transmitted information with nearly one hundred instances greater bandwidth. That may want to enable information switch rates of more than one hundred bits consistent with 2nd -- sufficient to send a simple text. While that might not sound like a good deal, it may make lifestyles-saving verbal exchange with submarines and deep bunkers or mines viable.
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//www.engadget.com/2019/04/12/slac-antenna-vlf-radiation/
2019-04-12 09:00:31Z
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