From New Scientist: Copper coated, frequency-tuned, AND lets GSM and 3G cell phone signals through…
A type of wallpaper that prevents Wi-Fi signals escaping from a building without blocking mobile phone signals has been developed by a British defence contractor. The technology is designed to stop outsiders gaining access to a secure network by using Wi-Fi networks casually set up by workers at the office.
Did I mention that you can turn the wallpaper on and off? How fashionable.
Devices, Network filter, security, SOHO nets, wi-fi
Intel has developed chips that act as integrated frequency synthesizers:
Intel has unveiled a chip designed to meet the demands of future radio sets by switching between different networks and frequencies based on availability or local government regulations.
The chip maker showed off the 90nm complementary metal oxide semiconductor (CMOS) silicon transceiver with an integrated frequency synthesizer last week.
Intel’s new chip features a 10GHz radio, with the synthesizer enabling it to tune down to lower frequencies in 30KHz steps.
‘They tune and tweak themselves,’ explained Krishnamurthy Soumyanath, director of Intel’s communications circuits lab.
On a related note, Sanyo has developed a tiny FM tuner. This article is in Japanese, and reports the tuner chip (at 5mm wide) is about half the size of current tuners and requires no other parts to operate.
Devices, Network chip, filter, FM, frequency synthesizer, radio, spectrum, tuner