Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New radiofrequency device

06.06.2005


New radiofrequency device



The prestigious North American scientific publication, Physical Review Letters, has recently published an article about a radiofrequency device that was designed by a team of researchers at the Public University of Navarra, together with teams from the University of Seville and the Barcelona Universidad Autónoma.

The article is entitled, “Babinet Principle Applied to the Design of Metasurfaces and Metamaterials”.


The article is a result of research work between teams from the three universities on the theme of applications of what are known as meta-materials that have negative refractive index. Specifically, the device designed may be used in mobile communications systems, WiFi, aerials, transmitters, and so on.

A phenomenon of great scientific interest

In the published article, researchers have experimentally validated a phenomenon that has been of great scientific interest of late – that known as left-handed propagating or transmission media. These are media that have curious electromagnetic properties and that are not found in nature as such, i.e. media propagated in waves that do not appear in Nature.

Research was started on this in the 1960s – but as mere speculative theory – and it was not possible to make any kind of medium with the technology existing at the time. Research was taken up again in the late 1990s, when a series of technological solutions was put forward that enabled the design of a medium that could be manufactured and, in the early 2000s, a medium was developed.

The work of the Navarre researchers is on these lines, specifically applying them to the field of flat microwave circuits. The published article shows the application of these types of structures in flat technology, proposing, moreover, a new structure – that of complementary rings that interchange roles between metallic structures and air. The advantage of this is that it enables the making of a series of circuits that otherwise would be impossible and which, moreover, give quite an optimum response in that they have few losses and these are of small magnitude.

These structures can be applied to any high-range radio frequency device, i.e. mobile communications systems, WiFi, aerials, transmitters, and so on. Moreover, with the design of the flat circuit, the researchers have come up with another development in bidimensional structure which can be employed for shielding radio waves in a building or a room in such a way that interferences in wireless communications are avoided. This involves a series of laminas known as meta-surfaces.

Currently, researchers are continuing their investigations perfecting these surfaces. Moreover, given the optimum result achieved, they hope to make further advances in their applications.

Iñaki Casado Redin | EurekAlert!
Further information:
http://www.unavarra.es
http://www.basqueresearch.com

More articles from Information Technology:

nachricht World first: 'Storing lightning inside thunder'
18.09.2017 | University of Sydney

nachricht New software turns mobile-phone accessory into breathing monitor
14.09.2017 | The Optical Society

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Ultrafast snapshots of relaxing electrons in solids

Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!

When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...

Im Focus: Quantum Sensors Decipher Magnetic Ordering in a New Semiconducting Material

For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.

Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...

Im Focus: Fast, convenient & standardized: New lab innovation for automated tissue engineering & drug

MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.

MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...

Im Focus: Silencing bacteria

HZI researchers pave the way for new agents that render hospital pathogens mute

Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...

Im Focus: Artificial Enzymes for Hydrogen Conversion

Scientists from the MPI for Chemical Energy Conversion report in the first issue of the new journal JOULE.

Cell Press has just released the first issue of Joule, a new journal dedicated to sustainable energy research. In this issue James Birrell, Olaf Rüdiger,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

I-ESA 2018 – Call for Papers

12.09.2017 | Event News

EMBO at Basel Life, a new conference on current and emerging life science research

06.09.2017 | Event News

 
Latest News

“Lasers in Composites Symposium” in Aachen – from Science to Application

19.09.2017 | Event News

New quantum phenomena in graphene superlattices

19.09.2017 | Physics and Astronomy

A simple additive to improve film quality

19.09.2017 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>