The problem of guided wave propagation in a wave guide with imperfectly reflecting boundaries arises in several applications, such as propagation in mine tunnels and in screened surface wave guides. In recent years, many studies have been carried out on the propagation characteristic of radio waves in tunnels in UHF band [1-2]. From the theoretical point of view, tunnels can be regarded as holl...

Wireless communications from air to fresh water are studied here. Our analysis relies on plane wave propagation models. Specifically, the transmission loss and propagation loss of RF waves penetrating into fresh water are calculated for various propagation depths. Even though RF wireless communications are not well suited for seawater due to its high attenuation, our paper illustrates that RF c...

Microplasma arrays (MAs) are being investigated as a method to control the propagation of electromagnetic waves. The use of MAs as an electromagnetic wave controlling material is attractive as the electrical properties of MAs can be rapidly changed through combinations of the choice of operating conditions (e.g. pressure, gas mixture), the spatial distribution of the plasma and applied voltage ...

Low pressure ~,10 mTorr! inductively coupled plasma sources are being developed for etching and deposition of semiconductors and metals. In models for these devices, plasma dynamics are typically coupled to the electromagnetic fields through Ohm’s law, which implies that collisional heating is the dominant power transfer mechanism. In this article, we describe an algorithm to couple plasma dyna...

The launching of high-frequency electromagnetic waves into fusion plasmas is an effective method for plasma heating and noninductive current drive. In addition, the reflection of electromagnetic waves on the plasma cutoffs is utilized in electron density diagnostic measurements. The scope of this article is to comment on the standard approximations made in the simulation of electron-cyclotron w...

A three-dimensional Segmented Long Path (SLP) technique [1] is used to study both sub-ionospheric and trans-ionospheric electromagnetic wave propagation at Very Low Frequencies (VLF). This approach allows for the efficient calculation of transient electromagnetic fields radiated by impulsive sources (e.g. lightning) over great distances (hundreds of wavelengths) and utilizes the Finite-Differen...

Suspended particles in the atmosphere during sand and dust storms have numerous consequences on electromagnetic wave propagation in arid regions. The electromagnetic wave signal may suffer attenuation and cross polarization upon encounter with the suspended particles. However, meager information has hitherto been reported about effect of storms on the telecommunication systems operating in such...