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Efficient time domain method for analyzing electrothermal characteristics of semiconductor-containing microwave circuit

A technology of microwave circuits and time-domain methods, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as decreased accuracy and limited ability to analyze complex geometric structures, so as to reduce computational complexity and save memory , the effect of saving calculation time

Active Publication Date: 2020-10-30
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, there are dispersion errors in the solution process of the finite-difference time-domain method and the stepwise approximation is required for the electromagnetic structure of the surface, which leads to a serious drop in its accuracy and limits its ability to analyze complex geometric structures.

Method used

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  • Efficient time domain method for analyzing electrothermal characteristics of semiconductor-containing microwave circuit
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  • Efficient time domain method for analyzing electrothermal characteristics of semiconductor-containing microwave circuit

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0015] 1. The basic principle of CFDTD

[0016] The conformal difference finite-difference time-domain method (CFDTD) has been used to solve the ideal conductive object of arbitrary shape. This algorithm has the advantages of high precision, good stability and time saving. For cells located in non-conductive areas, the usual FDTD approach is used, while for cells in metallic areas, special handling is required.

[0017] Equation (1.1) is the Maxwell integral equation:

[0018]

[0019] The discrete form of equation (1.1) is given in equation (1.2), which is a traditional discrete form of updating the magnetic field.

[0020]

[0021] l x , l y are the lengths of the non-conductive region along the x-axis and y-axis, respectively, and S(i,j) refers to the area of ​​the non-conductive region. The update iteration of the electric field only n...

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Abstract

The invention discloses an efficient time domain method for analyzing electrothermal characteristics of a semiconductor-containing microwave circuit. The efficient time domain method comprises the following steps: firstly, solving a linear electromagnetic field structure by utilizing a conformal time domain finite difference method, loading boundary conditions at a field-path connection position in the electromagnetic field structure by calculating a linear field-path coupling matrix equation, and extracting a time domain impact response signal of the linear electromagnetic structure by calculating the linear field-path coupling matrix equation; coupling the extracted time domain impact response signal with a non-linear semiconductor device, and calculating to obtain time domain information at the port position of the non-linear field-path coupling system; and then performing electro-thermal coupling effect analysis on the semiconductor microwave circuit based on the physical model through a time domain spectral element method, and performing coupling solution on the drift diffusion equation set and the heat conduction equation set. By using the efficient time domain method provided by the invention, a more complex microwave circuit can be processed, and the calculation efficiency of the nonlinear microwave circuit is improved.

Description

technical field [0001] The invention relates to the technical field of microwave circuits of semiconductor physical models, in particular to an efficient time-domain method for analyzing the electrothermal characteristics of microwave circuits containing semiconductors. Background technique [0002] Nowadays, electromagnetic simulation technology is very important in the performance evaluation and design of electronic equipment. The core of electromagnetic simulation technology is to numerically solve the classic Maxwell equations, which describe the coupling law between electric field and magnetic field. Most of the electromagnetic simulation technology research focuses on the improvement and improvement of the calculation accuracy and efficiency of different electromagnetic field numerical calculation methods. With the rapid advancement of computer technology, the numerical calculation methods of various electromagnetic fields have also developed rapidly in terms of the a...

Claims

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Application Information

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IPC IPC(8): G06F30/367G06F30/398
CPCY02E60/00
Inventor 丁大志陈如山樊振宏潘涛李翰祥
Owner NANJING UNIV OF SCI & TECH
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