Waveguide port excitation method for solving electromagnetic finite element

A finite element and waveguide technology, applied in the field of computational electromagnetics, can solve problems such as unavailability and program failure, and achieve the effect of avoiding disturbance, small calculation amount, and strong portability

Active Publication Date: 2020-03-06
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology

The problem brought about by this treatment is that the waveguide excitation port can only be placed on the outermost side; when the calculation scene is complex and the excitation antenna must be set inside the calculation area, this solution will fail and cannot be used

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  • Waveguide port excitation method for solving electromagnetic finite element
  • Waveguide port excitation method for solving electromagnetic finite element
  • Waveguide port excitation method for solving electromagnetic finite element

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Embodiment Construction

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Huygens source, including current source and magnetic current source; because the current source will generate electromagnetic waves on both sides of the excitation surface at the same time, it will be distributed symmetrically along the excitation surface; the magnetic current source will also generate electromagnetic waves on both sides of the excitation surface, and will also generate The surface is symmetrically distributed. When the current source and the magnetic current source exist at the same time, the electromagnetic waves generated by them strengthen each other in one direction and cancel each other in the other direction. That is, the Huygens source only produces unidirectional electromagnetic waves, which are also electromagnetic waves that excite the antenna.

[0040] The present invention takes the radiation fie...

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Abstract

The invention provides a waveguide port excitation method for electromagnetic finite element solution. A current source and a magnetic current source are applied to the waveguide port at the same time, only one direction, namely the electromagnetic wave for exciting the waveguide antenna, is generated, so that the waves in the other direction are mutually counteracted without generating the electromagnetic wave, and disturbance to a calculation area is avoided. Electromagnetic finite element solving can be carried out when the port is placed at any position of a calculation area, and limitation of the placement position is avoided. Meanwhile, the excitation problem of the waveguide port in the specified direction during finite element electromagnetic calculation is solved, and the convenience of the solving process is improved. According to the method, in a finite element solving formula, the change of an original calculation program is small, the increased calculation amount is small,and the portability is high.

Description

technical field [0001] The invention belongs to the technical field of computational electromagnetics, and in particular relates to a waveguide port excitation method for electromagnetic finite element solution. Background technique [0002] In the electromagnetic calculation software, there are many radiators, such as horn antennas, etc., and the port excitation is applied in the form of a waveguide port; the basis of the algorithm is to first calculate the magnetic field distribution of the eigenmode, and then add the magnetic field to the algorithm in the form of an equivalent current source to generate incentives. The result of this is an electromagnetic field in two directions perpendicular to the surface of the current source: one direction is a useful field to excite the antenna; the other direction is an unwanted field that interferes with the computing area. In the current mainstream commercial software based on finite element electromagnetic calculations, the wave...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F17/12
CPCG06F17/12Y02E60/00
Inventor 王春肖龙吴为军倪超黄明亮
Owner CHINA SHIP DEV & DESIGN CENT
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