A four-port wideband cavity-backed antenna is presented for indoor base stations applications. The composed of a square open cavity with an X-shaped isolating block and 4 feeding monopoles symmetrically orthogonally arranged in the aperture cavity. novel methodology based on Characteristic Modes Analysis (CMA) used identifying modes which are contributing to coupling. As result this analysis, p...

The effects of air loading on the acoustical properties of tabla, an Indian musical drum, are investigated by idealizing it as a composite membrane backed by a rigid cylindrical cavity. The coupled boundary value problem for membrane vibration and acoustic pressure, assuming acoustic radiations to be the only source of dissipation, is solved using a Green's function method. It is shown that air...

Abstract In this case, a substrate integrated waveguide technology is used in conjunction with cavity-backed slot antenna. The modified antenna, comparison to the dumbbell-shaped slot, not only adds numerous additional resonance spots, but it also enables antenna attain better gain. addition this, high-order resonant modes that are contained inside sub cavity may be stimulated by ground coplana...

The paper is concerned with one aspect of optimization of microwave thermal processing, namely, with optimization of energy coupling interpreted as a numerical characteristic of system efficiency. Since in computer-aided design coupling can be evaluated through the computed reflections, an optimization scheme is presented that is particularly suitable for minimizing the reflection coefficient i...