Abstract Within the dual symmetric point of view, theory for seeking axion dark matter via haloscope experiments is derived by exactly solving electrodynamics equation. Notwithstanding that conventional presented in [9,11] more commonly used theory, we show has advantages to apply into theory. First, and perspective coincide under long-wavelength approximation. Moreover, can obtain an exact ana...

The paper is concerned with the three-dimensional electromagnetic scattering from a large open rectangular cavity that embedded in perfectly electrically conducting infinite ground plane. By introducing transparent boundary condition, problem formulated into value bounded cavity. Based on Fourier expansions of electric field, Maxwell equation reduced to one-dimensional ordinary differential equ...

This research proposes a compact indirect slot-fed wideband patch array antenna for missile seeker application. The proposed single consists of three dielectric layers radiator, an air substrate-integrated waveguide (SIW) cavity, and feeding network. rectangular is used as radiator on the first substrate layer, SIW cavity (ASIWC) employed to obtain high directivity low mutual coupling character...

Abstract In order to cut off the connection between mobile terminal and communication base stations or Wi-Fi, it is necessary improve electromagnetic shielding efficiency of phone cabinet. This paper analyzes resonant characteristics cabinets. The test method has been introduced. Through Maxwell wave equation boundary conditions, cavity frequency every small drawer on cabinet derived, rectangul...

Flat roofs and platform sinking are two common installation configurations for high-speed pantographs. The cavity formed by the is a potential source of aerodynamic drag noise. In this paper, shape rectangular optimized, performance pantograph with or without compared discussed based on optimized results. flow field sound propagation predicted improved delayed detached eddy simulation (IDDES) m...

In this work we study numerically the turbulent natural convection of nanofluids (water + Al2O3/NTC/Cu) in rectangular cavities differentially heated. The objective is to compare effect macro-structural aspect cavity and types studied on thermal exchange by type geometry. Therefore, have treated cases these three nanofluids, for different particles volume fractions (0 ? 0.06) form ratios cavity...

We design high-quality-factor photonic crystal nanobeam cavities formed by two mechanically isolated cantilevers. These "split-beam" cavities have a physical gap at the center, allowing mechanical excitations of one or both of the cavity halves. They are designed by analyzing the optical band structures and mode profiles of waveguides perforated by elliptical holes and rectangular gaps and are ...

We present a theoretical study of electromagnetic reflection and cavity modes of 1D-subwavelength rectangular metallic gratings exposed to TE-polarised light. Computations are made using the modal development proposed by Sheng [1] and are a generalisation of those used by Barbara et al. [2]. In particular we study the influence of the choice of boundary conditions on the metallic surfaces on th...

We use both electromagnetic topology EMT and the Baum-Liu-Tesche BLT equation to analyze a cavity model with an aperture. More precisely, we combine the aperture coupling theory and EMT to study the issues of the electromagnetic field penetration through apertures into a cavity and the coupling to a two-wire transmission line in it. We employ the equivalence principle to establish the equivalen...

In this paper, we use Bejan’s Constructal theory to optimize the geometry of a H-shaped cavity that intrudes into a solid conducting wall. The objective is to minimize the global thermal resistance between the solid and the cavity. Internal heat generation is distributed uniformly throughout the solid wall. The cavity surface is isothermal, while the solid wall has adiabatic conditions on the o...