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April 15-16, 2019 | Frankfurt, Germany
Applied Physics & Laser, Optics and Photonics
International Conference on
Materials Science and Nanotechnology | Volume: 3
Breast tumor detection using CMOS radar switches
Afreen Azhari
Hiroshima University, Japan
Radio frequency (RF) single-pole-multiple-throw
(SPMT) switch is an important building block in
various complementary metal-oxide semiconductor
(CMOS) control circuits, such as in radar systems,
tumor detection in biomedical applications, phase
shifters, multibeam applications, and multiband
selection communication systems. Recently, research
on microwave radar-based breast tumor detection
systems has gained attractions for removing the
problems of ionized radiation and painful breast
compression of X-ray mammography. In a radar-
based microwave tumor detection system, a 3-10.6
GHz ultrawide band (UWB) CMOS-integrated
transmitter and receiver are used while controlling
antennas by the UWB switching matrix.
In microwave-based breast cancer detection
system, a huge double-pole-16-throw (DP16T)
mechanical switch is used to control a 16-antenna
array. At one time, only one pair of antennas is
selected by the switch, where one of the pairs is the
transmitting and the other the receiving antenna.
If there is any target, the signal reflected from the
target or tumor will be received by the receiving
antenna, and an image is formed using the confocal
algorithm. This conventional mechanical switching
matrices, used to control the 16-radar antenna,
are large in size, consume huge power of 10 to 100
watts and an obstacle to make a portable compact
breast cancer detection system. In this work low
power CMOS multi-input-multi-output switches
of 1mW have been proposed to replace the
conventional mechanical switches in CMOS breast
cancer detection device, so that the whole system
become compact and portable. The proposed
switching matrices are also designed for very large
bandwidth from 3 to 20 GHz, for the distortion less
communication of UWB Gaussian monocycle pulse.
Speaker Biography
Afreen Azhari has received BSc and MSc in Electrical and Electronics
Engineering from Bangladesh University of Engineering and Technology,
Dhaka, Bangladesh in 2001 and 2004 respectively. She has a PhD in
Integrated Semiconductor Electronics from Hiroshima University,
Hiroshima, Japan in 2011. She worked as a researcher in Hiroshima
University from 2011–2015 and in the Institute of Scientific and
Industrial Research of Osaka University from 2016-2018. Her research
interests are Biomedical circuit and system design, CMOS RF integrated
circuit and system design.
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