Low Power Use for Mobile Devices:
by Anusha
As the usages of handheld devices are
increased now-a-days, the consumers need larger display screens, more memory
and especially the ability to play high definition video files. If the users of
mobiles such as tablets, smart phones and notebooks want to share data from on
device to another, a great deal of time and effort are needed.
One of the possible methods of high
speed data transmission is Giga Bits per Second (GBPS) wireless communication,
operating over 60 gigahertz (GHz) frequency band. Already some of the commercial applications
are available for streaming full-HD videos by using 60 GHz band. But mobile
applications have not been developed yet because 60 GHz radio frequency (RF)
circuit consumes 100 milli watt of DC power.
Professor
Chul Soon Park from the Department of Electrical Engineering at the Korea
Advanced Institute of Science and Technology (KAIST) and his research team developed
a low power radio frequency integrated circuit (RFIC). It has an
energy-efficient modulator performing both amplification and modulation and
also it contains a sensitivity improved receiver employing high gain boosting
demodulator.
The
research team said that the RFIC draws a little power of 67mW in 60 GHz
frequency band. In that 31mW to send data and 36mW for receive data. And the
salient feature of this IC is it is small enough to mount on a smart phones or
notebooks, requires only one chip (chip length, width, height are 1mm. Also it has
an antenna (4x5x1 mm) for receiving and sending data.
Professor Park, Director of the
Intelligent Radio Engineering Center at KAIST, gave an upbeat assessment of the
potential of RFIC for future applications:
“The IC what we have developed is a
low-power 60-Ghz RF chip with transmission speed of 10.7gigabits per second. In
tests, we were able to stream full-HD videos from one mobile to another without
a cable. Our chip can also be installed on mobile devices or on camera for
virtual connecting with other and large data transmission.”
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