We analyze the properties of electromagnetic metamaterials with anisotropic constitutive parameters. Particularly, we analyze the so-called Radial Photonic Crystals, which are radially periodic structures verifying the Bloch theorem. This type of crystals can be designed and implemented in acoustics as well as in electromagnetism by using anisotropic metamaterials. They were originally proposed...

Presents information on the MMTS RF MEMS and Microwave Acoustics Committee.

Microwave-induced thermal acoustic imaging (MITAI) is a promising early breast cancer detection technique, in which image construction is based on thermo acoustics signals generated by the illumination of microwave pulses in tissue. In this work we have performed a microwave induced thermal acoustic signal generation simulation study using Comsol Multiphysics. A biological tissue model irradiat...

1 Scattering matrices and existence of trapped waves Systems with finitely many scattering channels are discussed in various branches of wave physics. One can mention, for instance, diffraction gratings (optics), waveguides with local perturbations (acoustics, microwave and quantum physics), etc. (few examples are shown in Fig.1). In all cases, far away from the scattering area both incident an...

This paper presents a short review of the microwave acoustics area, where exciting material innovations and performance advancements have been made in past decade. The ever-growing demand for more sophisticated passive signal processing functions on-chip has fueled these developments. As result, acoustic devices maintained leadership mobile applications. By evaluating three fundamental paramete...

Many natural and man-made media such as the atmosphere, oceans, geophysical media, biological media, and composite and disordered materials have random spatial inhomogeneities and vary randomly in time, and these media are called “random media. ’’ Microwaves, optical waves, and acoustic waves propagating in these media experience random fluctuations in space and time, and these fluctuations aff...

An experimental study of the microwave backscatter and acoustic radiation from breaking waves is reported. It is found that the averaged microwave and acoustic measurements correlate with the dynamics of wave breaking. Both the mean-square acoustic pressure and the backscattered microwave power correlate with the wave slope and dissipation, for waves of moderate slope (S < 0.28). The backscatte...

William A. Watkins, Woods Hole Oceanographic Institution ~WHOI!, led the development and refinement of the WHOI Radio Whale Tag. The initial tags were developed in the 1960s at WHOI, improved in the 1970s and 1980s by Ocean Applied Research, Inc., and adapted to satellite telemetry in the 1990s by Microwave Telemetry, Inc. Through this entire period, the tag delivery and attachment methods were...