...Davide Ramaccia; Filiberto Bilotti; Alessandro Toscano; Lucio Vegni Purpose – The purpose of this paper is to design simple and high-performing screens capable to separate circularly polarized electromagnetic waves in Ku band from the ones in Ka band. Design/methodology/approach...

...Fabrizio Frezza; Lara Pajewski; Cristina Ponti; Giuseppe Schettini; Nicola Tedeschi Purpose – The purpose of this paper is to investigate the numerical aspects of the electromagnetic scattering of a plane wave by a set of buried cylinders. Design/methodology/approach – The cylindrical wave...

..., calculation model and the Runge‐Kutta method, a program to simulate the interaction between particles and fields is designed and its software implementation is achieved using Fortran language. To testify the correctness of the calculation model, a millimeter wave gyroklystron amplifier is simulated...

...Jens Haueisen; Hartmut Brauer; Mehbub‐ur Rahman; René Marklein Purpose The purpose of this paper is to present a time‐domain technique to compute the electromagnetic wave field and to reconstruct the permittivity and electric conductivity profile of a one‐dimensional slab of finite length...

... acoustic resonator) resonator. Design/methodology/approach The piezoelectric theory that uses an equivalent circuit is able to evaluate the thickness‐extensional vibration modes in simple 1D configuration but it is not adequate to predict spurious modes with lateral wave vector. Therefore, a fully 3D...

... Finite element analysis Electromagnetism Waves Transmission peaks appear inside the band‐gap if the periodicity of the crystal is interrupted, so that the whole structure behaves as a spatial filter. A periodicity interruption can be performed by splitting the woodpile with a spacing of width...

...Patrick Dular; Gerard Meunier; Francis Piriou; Danson M. Joseph; Willem A. Cronje Purpose The purpose of this paper is to present a double‐sided tubular linear machine layout direct‐drive applications, with particular focus on wave‐energy conversion. The paper documents both the computational...

..., and their main aspects are stressed in the paper. As an example, the surface charge density on a finite and thin plane plate calculation is presented, in which the main computational performance aspects are evaluated. © Emerald Group Publishing Limited 2004 Waves Optimization techniques Numerical...