Featured Research

from universities, journals, and other organizations

New Radiofrequency Device

Date:
June 13, 2005
Source:
Elhuyar Fundazioa
Summary:
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 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.

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.


Story Source:

The above story is based on materials provided by Elhuyar Fundazioa. Note: Materials may be edited for content and length.


Cite This Page:

Elhuyar Fundazioa. "New Radiofrequency Device." ScienceDaily. ScienceDaily, 13 June 2005. <www.sciencedaily.com/releases/2005/06/050613063031.htm>.
Elhuyar Fundazioa. (2005, June 13). New Radiofrequency Device. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2005/06/050613063031.htm
Elhuyar Fundazioa. "New Radiofrequency Device." ScienceDaily. www.sciencedaily.com/releases/2005/06/050613063031.htm (accessed July 28, 2014).

Share This




More Matter & Energy News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Europe's Highest Train Turns 80 in French Pyrenees

Europe's Highest Train Turns 80 in French Pyrenees

AFP (July 25, 2014) — Europe's highest train, the little train of Artouste in the French Pyrenees, celebrates its 80th birthday. Duration: 01:05 Video provided by AFP
Powered by NewsLook.com
TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) — TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) — Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) — When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins