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Privacy groups protest RFID tagging of razors
Talkback RFID works like this: an antenna (usually huge ones) emit a radio wave that 'ask' nearby tags to report themself.the tag is a passive device, with no battery.it gains the energy to report back by converting part of the radio wave energy to...
[August 26, 2003, 2:07]
Software Radio Architecture with Smart Antennas: A Tutorial on Algorithms and Complexity
White Papers The concrete computational complexity and algorithm structure of a base station is considered in terms of a software radio system model, initially with an omni-directional antenna. First, traffic improvement in a network with smart antenna is...
[November 9, 2003, 23:49]
Zap!... and your PC's dead
News The device uses technology dating back to Tesla, essentially pushing a 20-megawatt burst of undisciplined radio noise through an antenna. Former Navy engineer David Schriner showed off an unwieldy device constructed from a parabolic reflector, a...
[September 10, 1999, 9:18]
Antenna to boost wireless security
News An optical antenna that uses a geometrically shaped lens promises to bring greater security to wireless networks for businesses, according to British scientists. But this new antenna is so precise, according to the researchers, that it can detect a...
[November 11, 2002, 16:12]
3G masts 'safer than 2G'
News For example, on average, a 3G mobile phone base station antenna radiates a little more than one tenth of the power of a taxi’s two-way radio. Horton said because the 3G towers use smart technology to encode information on the radio signal and the...
[December 23, 2003, 9:20]
Government may ease the way for wireless broadband
News Some mesh radio systems -- multi-point to multi-point broadband services -- also involve the installation of an antenna on the outside of a building, although a recent trial of mesh radio carried out by BT was not successful.
[April 8, 2003, 13:41]
E-TEN Glofiish V900 review
Reviews The FM radio uses the same 175mm telescopic antenna as the TV tuner, which means you don't have to use the provided headphones — you can listen through the device's loudspeaker if you want. The antenna's main task, though, is to receive TV signals...
[September 29, 2008, 11:54]
Broadcom introduces combo 802.11n chip
News Broadcom's chip uses single-stream 802.11n, because the space, battery power and processing power restrictions in mobile devices would not support the multiple-antenna implementation used in larger 802.11n devices, according to the company.
[December 9, 2008, 12:46]
Breaking on through to 4G
News Push more signal through the channel by upping the power - or having a more focussed antenna, or widening the bandwidth - and you can send more data. This is what you see if you unplug the antenna from your television: each speckle on the screen is...
[August 9, 2005, 13:00]
Ruckus updates 802.11n Wi-Fi portfolio
News However, Calderbank said Ruckus's dynamic beamforming antenna technology allows "better performance at a better range" than competing 802.11n products, citing tests that achieved 171Mbps throughput over a distance of about 15 metres, with two...
[March 10, 2009, 16:18]
Behind Palm's new network
News The Palm VII's flip-up antenna, resembling a lollipop stick that nestles along one edge of the unit, serves as an alternate power-on switch. Raising the antenna activates the unit, in a gesture reminiscent of a "Star Trek" character flipping open a...
[January 15, 1999, 6:06]
Intel demos first ultrawideband wireless
News One is the antenna: most antennae are tuned to a particular frequency, but UWB needs precisely the opposite. As one antenna was shielded from the other by hand, the BER went up and the throughput went down.
[March 12, 2002, 6:31]
A Year Ago: Behind Palm's new network
News The Palm VII's flip-up antenna, resembling a lollipop stick that nestles along one edge of the unit, serves as an alternate power-on switch. Raising the antenna activates the unit, in a gesture reminiscent of a "Star Trek" character flipping open a...
[January 15, 2000, 6:00]
Start-up's tech offers home networking boost
News The software continuously learns the environment and reconfigures the antenna to adapt to changing radio frequency, network and user conditions. A new start-up says it has developed antenna technology that can steer signals around obstacles...
[January 6, 2005, 8:35]
Echelon: How it works
News Most characteristic of these stations is the antenna, which looks not unlike an empty gasometer and is around the same size. Although microwaves can be tightly focussed, using parabolic antenna in the same way that car headlights use a curved...
[June 29, 2000, 11:09]
Hands-free mobiles 'increase normal radiation'
News Its research concluded that the wires leading to a hands-free ear piece act like an antenna, channelling a much more concentrated dose of radio waves into the ear. However, when we talked to radio engineers they weren't at all surprised.
[April 4, 2000, 16:02]
Rupert Goodwins' Diary
Blog This technology -- Multi-In, Multi-Out -- is what happens when you stick more than one antenna on a radio. Do it right by adding circuits to delay and amplify the signals from each antenna in the right way, and you can treat each physical path...
[February 4, 2005, 16:35]
Dual-Band Dipole Antenna for RFID Tag Applications
White Papers New design of a dipole antenna with rectangular fractal shape radiator element with two operating bands for Radio Frequency Identification (RFID) is presented. By using fractal shape slot and metal meander patch, the proposed antenna has the wide...
[April 14, 2009, 0:00]
Smart Antenna Systems
White Papers A smart antenna system combines multiple antenna elements with a signal-processing capability to optimize its radiation and/or reception pattern automatically in response to the signal environment. What does an antenna do in a telecommunications...
[August 14, 2003, 0:00]
Analysis and Design of a Koch Monopole Printed on a PCMCIA Card for the 2.4 GHz ISM Band
White Papers In this paper a Koch monopole antenna printed on a PCMCIA card is presented operating in the 2.4 GHz ISM band. The antenna/PCMCIA card system was simulated using two commercial Method of Moments codes (IE3D and Momentum).
[June 24, 2009, 16:02]
