Implementation method for allowing two-dimension cylindrical coordinates to completely absorb boundary in matching manner

A technology for absorbing boundaries and implementing methods, applied in the field of computational electromagnetics, can solve problems such as low frequency and unsatisfactory absorption effects of litter modes
CN102722651AInactive Publication Date: 2012-10-10西安居正知识产权运营管理有限公司
2 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
西安居正知识产权运营管理有限公司
Publication Date
2012-10-10
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an implementation method for allowing two-dimension cylindrical coordinates to completely absorb boundary in a matching manner. The method comprises the specific steps of inputting a model file, initializing a magnetic field, an electric field and related auxiliary variables to be zero, calculating a one-dimension coefficient array in a PML (perfectly matched layer), updating and calculating the electric displacement vector in a whole calculation area, updating and calculating the electric field of the whole calculation area, updating and calculating a source of the electric field, updating and calculating the auxiliary variables of the electric field in the PML area, updating and calculating the magnetic induction in the whole calculation area, updating and calculating the magnetic field of the whole calculation area, updating and calculating the auxiliary variables of the magnetic field in the PML area, judging whether to continue to update according to the set simulation calculation time, judging to continue to carry out calculation and returning to the step 3 if the actual calculation time is less than the set value, and otherwise, outputting the calculated electric and magnetic fields to completion. The implementation method can be combined with CFS (complex frequency shift) parameters to more effectively absorb electromagnetic waves spreading outwards.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of computational electromagnetism, and in particular relates to a method for realizing completely matching absorption boundaries of two-dimensional cylindrical coordinates. Background technique

[0002] Finite-difference time-domain method (FDTD, Finite-difference time-domain), as a time-domain numerical calculation method of electromagnetic field, has been widely used in fields such as radio wave propagation, antenna design, electromagnetic scattering, and electromagnetic compatibility. The introduction of the absorbing boundary makes the FDTD calculation in the finite area to solve the problem of propagation and scattering of radio waves in the infinite medium. The performance of the absorbing boundary is the main factor affecting the performance and accuracy of the FDTD method, among which the perfectly matched layer (PML, Perfectly matched layer) absorbing boundary is currently the most commonly used abs...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More