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Notwithstanding its infancy, wireless mesh networking (WMN) is a hot and
growing field. Wireless mesh networks began in the military, but have since
become of great interest for commercial use in the last decade, both in local
area networks and metropolitan area networks. The attractiveness of mesh
networks comes from their ability to interconnect either mobile or fixed
devices with radio interfaces, to share information dynamically, or simply to
extend range through multi-hopping.
標(biāo)簽：
Multi-hop
Networks
WiMAX
WiFi
Mesh
LTE
and
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2020-06-01
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n the first part of this book, we give an introduction to the basic applications of wireless com-
munications, as well as the technical problems inherent in this communication paradigm. After a
brief history of wireless, Chapter 1 describes the different types of wireless services, and works
out their fundamental differences. The subsequent Section 1.3 looks at the same problem from
a different angle: what data rates, ranges, etc., occur in practical systems, and especially, what
combination of performance measures are demanded (e.g., what data rates need to be transmitted
over short distances; what data rates are required over long distances?) Chapter 2 then describes
the technical challenges of communicating without wires, putting special emphasis on fading and
co-channel interference. Chapter 3 describes the most elementary problem of designing a wireless
system, namely to set up a link budget in either a noise-limited or an interference-limited system.
After studying this part of the book, the reader should have an overview of different types of
wireless services, and understand the technical challenges involved in each of them. The solutions
to those challenges are described in the later parts of this book.
標(biāo)簽：
Communications
Wireless
Edition
2nd
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A wireless ad-hoc network is a wireless network deployed without any infrastructure. In
such a network, there is no access point or wireless router to forward messages among the
computing devices. Instead, these devices depend on the ad-hoc mode of their wireless net‐
work interface cards to communicate with each other. If the nodes are within the transmis‐
sion range of the wireless signal, they can send messages to each other directly. Otherwise,
the nodes in between will forward the messages for them. Thus, each node is both an end
system and a router simultaneously.
標(biāo)簽：
WIRELESS
NETWORKS
AD-HOC
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2020-06-01
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Electrostatic discharge (ESD) is one of the most prevalent threats to the reliability
of electronic components. It is an event in which a finite amount of charge is trans-
ferred from one object (i.e., human body) to another (i.e., microchip). This process
can result in a very high current passing through the microchip within a very short
period of time, and, hence, more than 35% of chip damages can be attributed to an
ESD-related event. As such, designing on-chip ESD structures to protect integrated
circuits against the ESD stresses is a high priority in the semiconductor industry.
標(biāo)簽：
Electrostatic
Protection
Discharge
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2020-06-05
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Microengineering and Microelectromechanical systems (MEMS) have very few
watertight definitions regarding their subjects and technologies. Microengineering
can be described as the techniques, technologies, and practices involved in the
realization of structures and devices with dimensions on the order of micrometers.
MEMS often refer to mechanical devices with dimensions on the order of
micrometers fabricated using techniques originating in the integrated circuit (IC)
industry, with emphasis on silicon-based structures and integrated microelectronic
circuitry. However, the term is now used to refer to a much wider range of
microengineered devices and technologies.
標(biāo)簽：
Microengineering
Interfacing
MEMS
and
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2020-06-06
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GaN is an already well implanted semiconductor
technology, widely diffused in the LED optoelectronics
industry. For about 10 years, GaN devices have also been
developed for RF wireless applications where they can
replace Silicon transistors in some selected systems. That
incursion in the RF field has open the door to the power
switching capability in the lower frequency range and
thus to the power electronic applications.
Compared to Silicon, GaN exhibits largely better figures
for most of the key specifications: Electric field, energy
gap, electron mobility and melting point. Intrinsically,
GaN could offer better performance than Silicon in
terms of: breakdown voltage, switching frequency and
Overall systems efficiency.
標(biāo)簽：
GaN-on-Si
Displace
and
SiC
Si
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2020-06-07
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A power semiconductor module is basically a power circuit of different
materials assembled together using hybrid technology, such as semiconduc-
tor chip attachment, wire bonding, encapsulation, etc. The materials
involved cover a wide range from insulators, conductors, and semiconduc-
tors to organics and inorganics. Since these materials all behave differently
under various environmental, electrical, and thermal stresses, proper selec-
tion of these materials and the assembly processes are critical. In-depth
knowledge of the material properties and the processing techniques is there-
fore required to build a high-performance and highly reliable power module.
標(biāo)簽：
Manufacture
Electronic
Modules
Design
Power
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2020-06-07
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Introduction to Radio Frequency Identification (RFID): RFID is a
wireless modulation and demodulation technique for automatic
identification of objects, tracking goods, smart logistics, and access con-
trol. RFID is a contactless, usually short‐distance transmission and
reception technique for unique ID data transfer from a tagged object to
an interrogator (reader). The generic configuration of an RFID system
comprises (i) an ID data‐carrying tag, (ii) a reader, (iii) a middleware,
and (iv) an enterprise application.
標(biāo)簽：
Chipless_Radio_Frequency_Identifi
cation
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2020-06-08
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Identification is pervasive nowadays in daily life due to many complicated activities such as
bank and library card reading, asset tracking, toll collecting, restricted access to sensitive data
and procedures and target identification. This kind of task can be realized by passwords, bio-
metric data such as fingerprints, barcode, optical character recognition, smart cards and radar.
Radiofrequencyidentification(RFID)isatechniquetoidentifyobjectsbyusingradiosystems.
It is a contactless, usually short distance, wireless data transmission and reception technique
for identification of objects. An RFID system consists of two components: the tag (also called
transponder) and the reader (also called interrogator).
標(biāo)簽：
Processing
Digital
Signal
RFID
for
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2020-06-08
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adio Frequency Identification (RFID) is a rapidly developing automatic wireless data-collection
technology with a long history.The first multi-bit functional passive RFID systems,with a range of
several meters, appeared in the early 1970s, and continued to evolve through the 1980s. Recently,
RFID has experienced a tremendous growth,due to developments in integrated circuits and radios,
and due to increased interest from the retail industrial and government.
標(biāo)簽：
RFID-Enabled
Sensors
RFID
and
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2020-06-08
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