Multilayer finite difference methods for electrical modeling of packages and printed circuit boards
First Claim
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1. A method for electromagnetically simulating a planar multilayer structure, comprising:
- providing a data file that defines the material properties and layout of each plane, transmission line and via of the planar multilayer structure;
defining a plurality of unit cells that each represent a portion of the planar multilayer structure and that includes all planes of the planar multilayer structure;
for each unit cell, processing the data associated with the cell to generate an individual equivalent circuit model for that cell using a multilayer finite difference method;
interconnecting the unit cells to create an overall circuit model for the planar multilayer structure;
processing the overall circuit model to obtain frequency or time domain responses for the planar multilayer structure.
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Abstract
Disclosed are exemplary finite difference methods for electromagnetically simulating planar multilayer structures. The exemplary finite difference methods simulate multilayer planes by combining the admittance matrices of single plane pairs and equivalent circuit models for such single plane pairs based on multilayer finite difference approximation. Based on the methods, coupling between different layers through electrically large apertures can be modeled very accurately and efficiently.
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Citations
20 Claims
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1. A method for electromagnetically simulating a planar multilayer structure, comprising:
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providing a data file that defines the material properties and layout of each plane, transmission line and via of the planar multilayer structure; defining a plurality of unit cells that each represent a portion of the planar multilayer structure and that includes all planes of the planar multilayer structure; for each unit cell, processing the data associated with the cell to generate an individual equivalent circuit model for that cell using a multilayer finite difference method; interconnecting the unit cells to create an overall circuit model for the planar multilayer structure; processing the overall circuit model to obtain frequency or time domain responses for the planar multilayer structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Software for processing a data file that defines the material properties and layout of each plane, transmission line and via of a planar multilayer structure to electromagnetically simulate the planar multilayer structure, comprising:
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a code segment that defines a plurality of unit cells that each represent a portion of the planar multilayer structure and that includes all planes of the planar multilayer structure; a code segment that, for each unit cell, processes the data associated with the cell to generate an individual equivalent circuit model for that cell using a multilayer finite difference method; a code segment that interconnects the unit cells to create an overall circuit model for the planar multilayer structure; and a code segment that processes the overall circuit model to obtain frequency or time domain responses for the planar multilayer structure. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification