Tunable Windows To Keep Office Secrets

Dec 13, 2004

Secrets that zip across offices through wireless computing networks all too easily also zip through office windows into the hands of competitors – now researchers at the University of Warwick have devised a method of producing tunable surfaces that can selectively block signals from wireless networks from spilling out of the office.

Dr Christos Mias, in the University of Warwick’s School of Engineering has developed a “dipole grid based frequency–selective surface” (also known as an FSS surface) to perform this task. This grid of circuitry has the potential to be embedded in any glass window and then tuned to block the selected frequency. This ability to tune the circuit is triply useful. Firstly it means that the circuit can easily be tuned to block a different frequency if circumstances in the office change without having to remove the window or the embedded circuits. Secondly it allows for different window material variations– normally the variations in the type of glass used would mean that you would have to develop bespoke blocking circuits for each window – but by having a tunable system one can then have a one size fits all set of circuitry which can simply be tuned to match the glass type. Thirdly it can compensate for small FSS fabrication errors.

Dr Mias has already worked with colleagues in other universities and institutions to produce non-tunable FSS configurations on standard domestic glass. Both, optically transparent thin-film and opaque micromachined conductors have been employed attenuating the power of the incoming signal, at selected frequencies (above 20 GHz) by 100 to 1000 times.

Source: University of Warwick’s

Explore further: Study finds female entrepreneurs are discounted because of their gender

add to favorites email to friend print save as pdf

Related Stories

Why your laptop battery won't kill you

3 hours ago

News on Tuesday that major U.S. airlines are no longer going to ship powerful lithium-ion batteries might lead some to fret about the safety of their personal electronic devices.

Visa, MasterCard moving into mobile pay in Africa

3 hours ago

Americans may just be getting used to mobile pay, but consumers in many African countries have been paying with their phones for years. Now payment processors Visa and MasterCard want to get a slice of that market, and are ...

Recommended for you

Think twice about investing in own company

1 hour ago

Employees whose retirement plan is invested in stock of the company where they work do not pull out money as the firms approach financial distress, a recently released, but yet to be published paper, co-authored ...

Fossil lower jaw sheds light on early Homo

1 hour ago

A fossil lower jaw found in the Ledi-Geraru research area, Afar Regional State, Ethiopia, pushes back evidence for the human genus—Homo—to 2.8 million years ago, according to a pair of reports publis ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.