Wifi system lengthens mobile battery life
p2pnet news view WiFi | Cool:- Power pack companies such as Sony won’t be pleased by the news.
Canada’s Atif Shamim says he’s come up with a way to extend battery life by up to 12 times.
But the Battery Bunny doesn’t have to worry.
Yet.
Shamim, an electronics PhD student at Carleton University, says his invention is meant for use with power-hungry devices such as the Apple iPhone.
It involves a packaging technique, “to connect the antenna with the circuits via a wireless connection between a micro-antenna embedded within the circuits on the chip,” says the university.
“This has not been tried before —- that the circuits are connected to the antenna wirelessly,” says Shamim. “They’ve been connected through wires and a bunch of other components. That’s where the power gets lost.”
In June, 2007, “”Apple tried to answer critics who had given the iPhone low marks for its short battery life,” says a statement.
“Five months after unveiling the new product, the company announced the iPhone could now get up to eight hours of talk time, up from the five hours of talk time and 16 hours of audio playback at the launch.
“If an iPhone battery needs repairing, Apple will service it for $89, plus $10.77 for shipping for Canadian customers. All data on the iPhone is lost during the service, which normally takes three business days.”
The story’s headline claims the breakthrough can extend battery life by up to 12 times, “but that seems to be a misinterpretation of Shamim’s claim that his method reduces the power required to operate the antenna by a factor of about 12; 3.3 mW down from 38 mW,” says Soulskill on Slashdot.
Says Shamim’s paper, Wireless Interconnect Between On-Chip and LTCC Antennas for System-in-Package Applications:
“A novel LTCC based TX SiP implementation has been demonstrated which makes use of on-chip antenna to LTCC [Low Temperature Co-fired Ceramic] package antenna coupling through an aperture in the common ground plane. The strategy is useful as it eliminates the need of isolating buffers, bond pads, bond wires, matching elements, baluns and transmission lines. It not only reduces the number of components and simplifies SiP design but also consumes lower power. The chip coupling to LTCC patch antenna improves the TX module gain by 32 dB and range by 23 m as compared to the on-chip antenna alone, without affecting the RF circuit performance and power consumption. The conventional LTCC package provides 3 times more range than the proposed design but consumes 12 times more power.”
Carleton University – Carleton engineering student creates innovative invention to prolong battery life, November 27, 2008
Slashdot - Student Invention May Significantly Extend Mobile Device Battery Life, December 19, 2008
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