Twisted radio beams could untangle the airwaves

"The human race is not only exhausting tangible resources such as oil. The radiofrequency spectrum available for wireless communication is becoming the increasingly crowded, with virgin "veins" of frequency running short.

However, Swedish physicists say that twisting radio beams into a helical shape as they are transmitted could help ease the congestion."

http://www.newscientist.com/article/dn16591-twisted-radio-beams-could-untangle-the-airwaves.html