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Abstract
A new algorithm for the hybrid electromagnetic (EM) field-circuit simulation is proposed. It employs the equivalent current source with parallel equivalent resistance (ECS-PER) to simulate the effect of an EM subsystem on a circuit subsystem and adopts the volume structure to map the lumped circuit into the finite-difference time-domain cells. By including an additional current term in Maxwell-Ampere’s Law to represent the current density of the lumped circuit and using the finite difference scheme, the formulas of the proposed volume structure based ECS-PER algorithm is deduced for the first time. Two numerical examples of microwave circuits radiated under external EM incidence are simulated, and the results verify the accuracy and versatility of the proposed algorithm.
Highlights
Hybrid electromagnetic (EM) field-circuit simulation is very important in modern science and engineering
As one subclass of the equivalent source approach, the equivalent current source with parallel equivalent resistance (ECS-PER)-VS algorithm, which uses an equivalent current source with a parallel equivalent resistance to simulate the effect of EM subsystem on circuit subsystem and maps lumped circuits into finite-difference time domain (FDTD) cells as volume structure, has not been investigated in previous literature
By including an additional current term in Maxwell-Ampere’s Law, the formulas of the ECS-PER-VS algorithm are deduced for the first time
Summary
Hybrid electromagnetic (EM) field-circuit simulation is very important in modern science and engineering. When circuits are radiated by EM wave energy, due to the coupling effect, the analysis must be a combination of the EM simulation and the circuit simulation Another example is that when circuits work at high frequencies where the wavelength becomes comparable to the circuits’ physical dimensions, the parasitic and coupling effects among electrical devices require the hybrid EM field-circuit simulation.. Another example is that when circuits work at high frequencies where the wavelength becomes comparable to the circuits’ physical dimensions, the parasitic and coupling effects among electrical devices require the hybrid EM field-circuit simulation.2 Various methods for this simulation have been proposed. Some researchers pointed out that the wire or surface structure has some defects They do not take the actual dimensions of circuit devices into account and are usually associated with numerical parasitic elements that can dramatically spoil the simulation results. This work investigates the ECS-PER-VS, including analyzing the approach’s principle and deducing the mathematical formulas and validating it by two numerical examples
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