Recent Patents on Electrical Engineering
ISSN: 1874-4761
Recent Patents on Electrical
Engineering
Volume 2, Number 2, June 2009
Contents
Recent Patents on Integrated Software / Hardware GMR - Based
Systems and Applications for PCB Inspection Pp. 82-91
Giuseppe Megali, Matteo Cacciola, Diego Pellicanò
and Francesco C. Morabito
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A Review of Recent Patents on Bulk Acoustic
Wave Resonators and Filters Pp. 92-108
Óscar Menéndez, Jordi Verdú,
Edén Corrales and Pedro de Paco
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Article]
A Survey of Recent Patents on System
Techniques for UWB Pp. 109-114
Fernando Ramírez-Mireles
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Article]
Wearable and Implantable Wireless Body
Area Networks Pp. 115-124
Mehmet R. Yuce
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Article]
Multi - Antenna Systems for UWB Communications
- A Review Pp. 125-134
Yvan Duroc, Ali I. Najam and Smail Tedjini
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Article]
Tabu Search: Its Modified Forms and Management
Agent Pp. 135-145
Jukkrit Kluabwang and Sarawut Sujitjorn
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Article]
Recent Progress in High-Effective Solar
Energy Conversion Pp. 146-160
Halyna M. Khlyap
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Article]
Delta - Sigma Modulator Based Analog
Multiplier with Digital Output Pp. 161-164
Krishna M. Diwakar, Chinnaiyan Senthilpari, Ajay
Kumar Singh and Lim Way Soong
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Article]
Patent Selections Pp. 165-167
Abstracts
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Recent Patents on Integrated Software / Hardware GMR - Based
Systems and Applications for PCB Inspection
Giuseppe Megali, Matteo Cacciola, Diego Pellicanò
and Francesco C. Morabito
In this paper, the issue of Eddy Current Non-Destructive
Testing system exploiting Giant Magneto Resistive sensors
is presented for inspection of Printed Circuit Board. We propose
a wide view of the state-of-the-art into this inter-disciplinary
research field, following the chronological path of the major
results achieved in recent years. Once the relevant background
is depicted, some important patents concerning eddy current
probe and, in general, integrated software/hardware Giant
Magneto Resistive-based systems are introduced, with particular
reference to some patents about crack detection in conducting
materials. The advantages of the proposed models and some
possible improvements are discussed. Then a final look to
the possible developments is given.
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A Review of Recent Patents on Bulk Acoustic Wave Resonators
and Filters
Óscar Menéndez, Jordi Verdú,
Edén Corrales and Pedro de Paco
In this article, recent patents on bulk acoustic wave
(BAW) resonators and filters are reviewed. This technology
is suggested as a viable alternative to conventional surface
acoustic wave (SAW) technology since it offers better performance.
As regards resonators, in this review article recent patents
on the design and fabrication of Film Bulk Acoustic Resonators
(FBARs) and Solidly Mounted Resonators (SMRs) are presented.
The reviewed patents on BAW filters are divided into two categories.
In the first one, patents which deal with electrically-connected
resonator filters are presented, whereas in the second one,
acoustically-coupled resonator filters are addressed. Finally,
current and future developments of this technology are given.
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A Survey of Recent Patents on System Techniques for UWB
Fernando Ramírez-Mireles
Ultra wideband (UWB) is a modulation technique that uses
communication signals with a bandwidth in the order of hundreds
of megahertz or even various gigahertz. It is a very promising
communications technology under active research, development,
regulation, and standardization efforts, with applications
in computer and communications, consumer, radar, automotive,
and cable. UWB presents many design challenges, and requires
innovative designs for low-cost high-performance transmitters
and receivers. In this article, we discuss selected patents
on communications system techniques for UWB.
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Wearable and Implantable Wireless Body Area Networks
Mehmet R. Yuce
Using wireless technology for remote patient monitoring
has already taken place in hospitals around the world to support
diagnostic and therapeutic functions. Although, a large number
of wireless medical systems have been reported in the literature,
they have been designed for specific applications that cover
limited number of sensors and patients. Future wireless medical
monitoring systems should be used in a wireless body area
network (WBAN) scheme in order to operate in a larger area
in hospital environments. They should be able to incorporate
with other wireless systems such as Bluetooth, WiFi and short-range
wireless sensor systems such as ZigBee. Installing an interference
free wireless medical network for monitoring physiological
parameters in a medical center may be quite challenging since
there are a number of other wireless systems or equipments
(e.g. Wi-Fi, Bluetooth, ZigBee, Microwave oven) operating
already for different purposes. Thus it is very crucial to
design an interference free wireless system for a WBAN in
medical applications. In addition to unlicensed ISM bands,
there are medical bands such as MICS (Medical Implant Communication
Service) and WMTS (Wireless Medical Telemetry Service) that
are specifically regulated for medical monitoring by communication
commissions around the world. The recent short-range low data
rate ultra-wideband (UWB) technology is another attractive
technology that started to appear for body area network applications
due to its low transmitter power. Low power operation is essential
for sensor nodes in a wireless body area network application
as it determines the life time and the size of the device.
It is therefore desirable to use a wireless standard (or a
wireless chip) that will provide low power consumption and
has a minimum transmitted power that still meets the required
range of the body area networks. Recent developments have
focused on the designs of individual wireless sensor electronics
that can be used as an implantable and wearable node to detect
signals such as EEG, ECG, pulse rate and temperature. This
work will review the recent advances and relevant patents
in wireless body area network applications. Issues related
to hardware implementations, software and wireless protocol
designs for a complete wireless body area network application
have been addressed.
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Multi - Antenna Systems for UWB Communications - A Review
Yvan Duroc, Ali I. Najam and
Smail Tedjini
This article focuses on multi-antenna systems for Ultra
Wideband (UWB) communications. Conceptual antenna arrangements
and specific designs are reviewed according to the aimed applications.
Some specific parameters to characterize antennas for MIMO-UWB
applications are discussed. The perspectives in sense of future
developments of UWB multi-antennas and their functionalities
are also suggested. In this article patent based information
on multiple antenna for UWB communication is also discussed.
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Tabu Search: Its Modified Forms and Management Agent
Jukkrit Kluabwang and Sarawut
Sujitjorn
This article presents a review of a kind of evolutionary
algorithms belonging to lamarckian learning group. It begins
with providing background of evolutionary algorithms. Explanation
on generic tabu search is given together with reviews of its
variation. The reviews cover reactive tabu search (RTS), parallel
tabu search (PTS), probabilistic tabu search (PrTS), hybrid
tabu search (HTS) and adaptive tabu search (ATS). Finally,
the article presents a meta-heuristic approach referred to
as the management agent (MA) for search. With the MA, search
performance can be improved dramatically as being confirmed
by our results of surface optimization problems. In this article
the most important patents are also discussed.
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Recent Progress in High-Effective Solar Energy Conversion
Halyna M. Khlyap
High efficiency of solar energy conversion is not possible
without proper design of solar cells. Along with conventional
structures based on crystalline silicon or wide band gap A3B5materials
there are proposed solar cells of various architecture (for
example, tandem solar cells) and solar cells fabricated using
novel technologies. The paper presents the following types
of high-effective solar cells: i) solar cells fabricated on
high oxygen concentration single crystal silicon substrates
grown by CZ-method with thin film silicon active layer for
enhanced photoelectron conversion formed by ion implantation
with optical coatings for advantageous coupling of solar radiation
into thin film solar cell devices via the use of rare-earth
metal oxide (REOx),
rare-earth metal oxynitride (REOxNy)
and rare-earth metal oxyphosphide (REOxPy)
glasses and or crystalline material; ii) single p-n-junction
solar cells including an alloy of either InGaN or
InAlN formed on one side of the p-n-junction
with Si formed on the other side in order to produce characteristics
of a two junction tandem solar cell through only a single
p-n junction are expected to achieve 30%power efficiency.
Furthermore, the paper discusses necessary fundamentals of
solar device functionality and describes important physical
features of casings used in device design. Recent patents
information on solar energy conversion is also discussed in
this article.
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Delta - Sigma Modulator Based Analog Multiplier with Digital
Output
Krishna M. Diwakar, Chinnaiyan Senthilpari, Ajay
Kumar Singh and Lim Way Soong
In this paper, a new technique is proposed for multiplication
of two sampled analog signals and the result is in digital
form. The analog signals which are to be multiplied are fed
to the inputs of two different second order Delta sigma modulators
after sampling at different sampling rates. The operating
clock periods of the two DSMs are also different. The output
of the DSM which is operating at higher clock frequency is
inverted or not inverted depending on the bit state at the
output of low frequency DSM. The resulting bit stream at the
output of multiplier is the digital representation of the
product of the two analog signals. Most important patents
are also discussed in this article.
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