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Phase shifter is an important constituent element of magnonic devices, especially for the operations of logic gates based on spin waves. The mechanisms and ways to control phase shift of propagating spin waves have been studied for a period of time by both experiments and theory. The most universal design of spin-wave phase shifter is to use an Ostered field produced by a highly localized dc current...
Two sets of stator windings of the brushless doubly-fed machine (BDFM) remain unchanged to keep the characteristic of variable speed constant frequency (VSCF). However, if either set of windings are excited with a DC power source, the BDFM would operate in the variable speed variable frequency (VSVF) state. On the basis of VSVF, this paper presents a new structure design by substituting one set of...
In the last decades the electrical stimulation therapy has played an important role for neural regeneration. However, the amplitude of electric shocks will be decayed greatly after penetrating into biological tissues. The patient will also suffer from the skin injury caused by electrodes. Recent years, the positive effect of magnetic stimulation on neuronal growth has been studied for several years...
We model and simulate the microscopic electromagnetic fields induced by ion currents passing through nanochannels based on membrane currents data obtained by A. L. Hodgkin and A. F. Huxley in their experiments on squid giant axons. We find that compared with magnetic field, electric field affects ion motion much more considerably, and we further discuss the effect of such electric fields on the spread...
This paper applies the Radial Basis function (RBF) collocation method to compute the eddy current magnetic field coupled with conductor movement. Because of the linear characteristic of the RBF collocation matrix equation, the unknown magnetic vector potential could be easily decoupled and directly expressed in moving coordinate systems without model recast. This offers a great convenience to deal...
This paper presents a review on the improved magnetron modelling which was achieved by exploiting a newly-developed software tool to automate the model definition in command-line solvers. The software was designed to work with the renowned MAGIC command-line software, by introducing pre-processing functions which assist the user to enter the required parameters using a 3D graphical interface. This...
The basic operation principle of microwave oscillators, such as magnetrons, is based on the motion of electrons under a combined influence of electric and magnetic fields. In such process, the DC energy is converted into the RF energy via the interaction process between the electrons and the surrounding electromagnetic field. This nonlinear process provides sufficient conditions in generating rather...
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