04-17-2016, 10:17 PM
First time researchers of Columbia University School of Engineering and Applied Science have embedded a non-reciprocal circulator and a full-duplex radio on a nanoscale silicon chip.
A novel technology that can double wifi speed.
Director of the Columbia High-Speed and Mm-wave IC (CoSMIC) Lab and research team leader Associate Professor Harish Krishnaswamy said, "This technology could revolutionise the field of telecommunications," also said "Our circulator is the first to be put on a silicon chip, and we get literally orders of magnitude better performance than prior work,"
"Full-duplex communications, where the transmitter and the receiver operate at the same time and at the same frequency, has become a critical research area and now we have shown that Wi-Fi capacity can be doubled on a nanoscale silicon chip with a single antenna. This has enormous implications for devices like smartphones and tablets," he said.
The research which is said to have been goin on for several years could be a breakthrough for telecommunications work on silicon radio chips for
full duplex communications has been on a longtime and the team became particularly interested in the role of the circulator, a component that enables full-duplex communications where the transmitter and the receiver share the same antenna, In order to do this, the circulator has to "break" Lorentz Reciprocity, a fundamental physical characteristic of most electronic structures that requires
electromagnetic waves travel in the same manner in forward and reverse directions.
PhD student Negar Reiskarimian, who
developed the circulator said "We wanted to create a simple and efficient way, using
conventional materials, to break Lorentz Reciprocity and build a low-cost nanoscale circulator that would fit on a chip,"
Krishnaswamy and his team were able to design a highly miniaturised circulator that uses switches to rotate the signal across a set of capacitors to emulate the non-reciprocal "twist" of the signal that is seen in ferrite materials.
The research which was posted in jornal nature communication is said to have aside from the circulator, a prototype of their full-duplex system -a silicon IC that included both their circulator and an echo-cancelling receiver was built.