Surface wave transmission line theory for single and many wire systems

Comparison of Transmission Line Methods for Surface Acoustic Wave Modeling

Surface Acoustic Wave (SAW) technology is low cost, rugged, lightweight, extremely low power and can be used to develop passive wireless sensors. For these reasons, NASA is investigating the use of SAW technology for Integrated Vehicle Health Monitoring (IVHM) of aerospace structures. To facilitate rapid prototyping of passive SAW sensors for aerospace applications, SAW models have been develop...

Elementary Theory of Line Broadening and Four-wave Mixing in Nonequilibrium Many-Particle Systems

The basic results of optical line broadening and four-wave mixing are deduced from first principles based on time-dependent many-body perturbation theory. The formalism allows us to write all the results in terms of nonequilibrium distribution functions without the need to assume a quasiequilibrium temperature. The connection of these results to the quantum Boltzmann equation is shown, which is...

Experimental Studies of Wave Transmission through Single Perforated Sheets and Upright Perforated Wave Filters

On the Theory of Spectral Line Widths of Coupled Many Wave Systems in Non-Thermal Equilibrium

The problem of the natural spectral line width Aco oi individual waves of a coupled many wave system in non-thermal equilibrium is discussed within the Fokker Planck approach to fluctuation phenomena. Edwards' method in turbulence theory is reinterpreted to relate AOJ via a modified energy balance equation to the spectrum of the mean wave intensities. This equation is solved for a model of the ...

Dyakonov surface wave resonant transmission.

The role of Dyakonov surface waves in the transmission through structures composed of birefringent media is theoretically explored. In the case of structures using prisms, unexpected high transmission above the critical angle due to resonant excitation of Dyakonov surface waves is predicted. This transmission is produced only when TE polarized incident wave reaches the interface supporting the ...