Doug Lung /
10.13.2011 03:40 PM
RF, Optical Wideband Phase Shifter Technology Breakthrough

Phase shifters have uses in both optics and radio communications. Wide bandwidths are required for applications such as radio astronomy (see the article on the CSIRO work in this week's RF Report), Ultra-Wideband (UWB) communications and imaging, satellites, radar and short range microwave systems. Phase shifters based on tuned circuits are limited in bandwidth. It's possible to use optical phase shifters for RF to attain bandwidths of 1 GHz or more, but these have been expensive to construct.

A team of researchers from the Universitat Politècnica de València's iTEAM (El Instituto de Telecomunicaciones y Aplicaciones Multimedia) in Spain has created the first, tunable broadband radio frequency (RF) photonic phase shifter. Because it is based on a single semiconductor element, the device will be cheap to manufacture and help save up to 80 percent on energy consumption.

"The relevance of this contribution is twofold. First, a 75 percent reduction--in comparison with previous designs--in the number of components needed will make it possible to save some of the space that the phase shifter occupies when it is integrated into a chip, and, consequently, to save in the production cost too," said Jose Capmany, head of UPV's iTEAM. "Moreover, reducing the number of active elements from five to one means a saving in energy consumption of up to 80 percent."

iTeam research Salvador Sales, commented, "Traditional phase shifters, based on microwave technologies, are limited in bandwidth and the possibility of tuning is also limited. By using photonic technology instead, we have been able to overcome both limitations."

This information is from a news releases from European Union's CORDIS. A paper describing the work was published in Optics Express.

Post New Comment
If you are already a member, or would like to receive email alerts as new comments are
made, please login or register.

Enter the code shown above:

(Note: If you cannot read the numbers in the above
image, reload the page to generate a new one.)

No Comments Found

Tuesday 03:07 PM
WMUR-TV Says FAA Drone Rules Preclude ENG
The FAA’s current rules and proposed ban on flight over people, requirement of visual line of sight and restriction on nighttime flying, effectively prohibit broadcasters from using UAS for newsgathering. ~ WMUR-TV General Manager Jeff Bartlett

Manor Marketing /   Tuesday 10:32 AM
Cobham takes on American Ninja Warrior
ignite strategic communications /   Tuesday 07:12 PM
Bexel Expands Inventory with Investment in Fujinon Cabrio Lenses

Featured Articles
Product News
Discover TV Technology