The subducting plate is an efficient waveguide for high-frequency seismic waves. Such effects are often observed in Japan as anomalously large ground acceleration and distorted pattern of seismic intensity extending along the eastern seaboard of the Pacific Ocean from deep earthquakes in the Pacific plate, and Kyushu to Shikoku region from deep events in the Philippine Sea plate. Seismograms in...

Rotman lens is a true-time-delay beam forming network with parallel plate structure. Owing to its frequencyindependency and wide-band operation, it has gained vast applications as feeding element of linear array antennas. However, the lens suffers from high intrinsic power loss and the problem worsens in microstrip structures by their inevitable dielectric loss. On the other hand, waveguides ex...

The relativistic effects on the TM-modes of one boundary corrugated parallel plate waveguide filled with uniaxial warm drifting plasma have been investigated. The dispersion relation for the TM-modes has been derived and the numerical computations have been carried out to study the effects of increased (relativistic) drift velocity and the temperature under this condition. The effects of drift ...

Waveguide terahertz time-domain spectroscopy (THz-TDS) is used to characterize the temperature dependent vibrational properties of three threat-related materials: 4-amino-dinitrotoluene (4A-DNT), pentaerythritol tetranitrate (PETN), and octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX). These materials are characterized as thin polycrystalline layers deposited in the 50 micron gap of a met...

Abstract In this paper, we conduct research of the waveguide strength under icing. Icing is assumed to be uniform along perimeter and length waveguide, so ice deposits considered in form an equivalent increase density structure. As a result, icing problem reduced gravitational bending waveguide. Waveguide has thin-walled rectangular cross-section; therefore, solution demand using theory plate. ...