The subject of acoustic waves might easily be considered a mature one, quite
specialized, with narrow and circumscribed fields of interest and of application. The
present book is an evidence of the opposite: it witnesses how the concept of acoustic
wave, a collective displacement of matter which perturbs an equilibrium
configuration, is a pervasive concept, which emerges in very different fields. This type
of phenomena can be analyzed from different points of view, it can be exploited in
different ways, and is the object of active investigations.
The concept of acoustic wave is a pervasive one, which emerges in any type of medium, from solids to plasmas, at length and time scales ranging from sub-micrometric layers in microdevices to seismic waves in the Sun's interior. This book presents several aspects of the active research ongoing in this field. Theoretical efforts are leading to a deeper understanding of phenomena, also in complicated environments like the solar surface boundary.
Surface Acoustic Wave (SAW) devices are widely used in multitude of device concepts mainly
in Micro Electro Mechanical Systems (MEMS) and communication electronics. As such,
SAW based micro-sensors, actuators and communication electronic devices are well known
applications of SAW technology. Due to their solid state design and fabrication compatible
with other modern technologies such as Microwave Integrated Circuits (MIC), MEMS, (Charge
Coupled Devices) CCD and integrated optic devices, SAW based sensors are considered to be
The book generously covers a wide range of aspects and issues related to RFID systems, namely the design of RFID antennas, RFID readers and the variety of tags (e.g. UHF tags for sensing applications, surface acoustic wave RFID tags, smart RFID tags), complex RFID systems, security and privacy issues in RFID applications, as well as the selection of encryption algorithms.
Ancient Hebrew and Christian tradition relates that the universe was created in six days,
following which there was a day of rest. What the old chronicles never recorded was that, on
the eighth day, the Creator must have dropped back into the lab to do some tidying up. Only
then, coming across his rough notes for Maxwell’s and the acoustic wave equations, did the
thought occur that the creation of light and sound could be logically extrapolated to x-rays
This book grew out of a semester-long course on the principles and applications of ultrasonics for advanced undergraduate, graduate, and external students at Concordia University over the last 10 years. Some of the material has also come from a 4-hour short course, “Fundamentals of Ultrasonic Waves,” that the author has given at the annual IEEE International Ultrasonics Symposium for the last 3 years for newcomers to the field.