Abstract: In this microstrip antenna design multi frequencies are used. Here working frequencies are 1.9 GHz and 2.0 GHz. Rectangular patch shape technique is used for designing this microstrip antenna. In our model electric field lines, conductance and input resistance have obtained by transmission line model whereas charge distribution, directivity and gains have brought by cavity model of re...

This thesis presents two families of novel waveguide-integrated components based on millimeter-wave microelectromechanical systems (MEMS) for reconfigurable systems. The first group comprises V-band (50–75 GHz) and W-band (75–110 GHz) waveguide switches and switchable irises, and their application as switchable cavity resonators, and tunable bandpass filters implemented by integration of novel ...

Abstract. We consider the Casimir force acting on a d-dimensional rectangular piston due to massless scalar field with periodic, Dirichlet and Neumann boundary conditions and electromagnetic field with perfect electric conductor and perfect magnetic conductor boundary conditions. The Casimir energy in a rectangular cavity is derived using cut-off method. It is shown that the divergent part of t...

We consider the charged d-dimensional black holes in a cavity extended phase space and investigate heat engine Joule-Thomson (JT) expansion. Since structure of is similar to anti-de-sitter (AdS) cases, we take as working substance calculate their efficiency Carnot cycle rectangular cycle. Also, discuss whether JT expansion consistent with AdS cases conclude effect different boundary conditions ...

The area and volume of the air cell system of fifty normal temporal bones were investigated. The area on a plain X-ray, Sonnenkalb projection, was measured by a planimetric method and a rectangular dimensional method by Imai in 1978. The volumes of the temporal bone air cells on high-resolution CT were calculated separately as partial volumes divided in all CT planes. The sum of the partial vol...

In this article, we propose and implement a novel technique to locate electromagnetic interference (EMI) sources using the concept of time-reversal (TR) cavity. We show in an intuitive manner that reflections from surfaces cavity can emulate infinite number sensors TR method. order EMI sources, equipment under test (EUT) is placed rectangular metallic cavity, suitable dimensions according consi...

Shape optimization issues under vibroacoustic criteria within the specific mid high frequency range are under consideration in the present paper. The main objective of this research is to develop an adjoint formulation for the shape optimization using Simplified Energy Method (MES). This will allow to implement the method into numerical modeling of engineering applications, such as noise reduct...

The creation of TE-mode photons in a three-dimensional perfectly conducting cavity with one resonantly vibrating wall is studied numerically. We show that the creation of TE-mode photons in a rectangular cavity is related to the production of massive scalar particles on a time-dependent interval. The equations of motion are solved numerically which allows to take into account the intermode coup...

In this paper, we study the electromagnetic scattering from a two dimensional large rectangular open cavity embedded in an infinite ground plane, which is modelled by Helmholtz equations. By introducing nonlocal transparent boundary conditions, the problem in the open cavity is reduced to a bounded domain problem. A hypersingular integral operator and a weakly singular integral operator are inv...