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Researchers at the Cockrell School of Engineering at The University of Texas at Austin have achieved a milestone in modern wireless and cellular telecommunications, creating a radically smaller, more efficient radio wave circulator that could be used in cellphones and other wireless devices, as reported in the latest issue of Nature Physics. The new circulator has the potential to double the useful bandwidth in wireless communications by enabling full-duplex functionality, meaning devices can transmit and receive signals on the same frequency band at the same time.

Currently, local utilities in the U.S. generate 12 percent more energy than they anticipate needing. Otherwise, if they experience a brownout or blackout, utility companies face heavy penalties from the government. “Most of that extra energy is going to waste,” WNCG Prof. Brian Evans states. “If utility companies had access to better information, they could predict user demand and how it evolves over the day. They could reduce energy waste by around four-to-six percent.”

A team of researchers in the Department of Electrical and Computer Engineering at The Unversity of Texas at Austin (UT ECE) led by Prof. Andrea Alù has built the first-ever circulator for sound. The team’s experiments successfully prove that the fundamental symmetry with which acoustic waves travel through air between two points in space (“if you can hear, you can also be heard”) can be broken by a compact and simple device.