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Modeling and intelligent design method of microstrip direct coupling filter

A coupled filter, intelligent design technology, applied in design optimization/simulation and other directions, can solve problems such as complex process and long cycle

Inactive Publication Date: 2020-02-07
SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a modeling and intelligent design of a microstrip direct coupling filter for the problems of long cycle and complicated process caused by the simulation design based on key indicators and experience in the past using trial or full parameter scanning method

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  • Modeling and intelligent design method of microstrip direct coupling filter
  • Modeling and intelligent design method of microstrip direct coupling filter
  • Modeling and intelligent design method of microstrip direct coupling filter

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Embodiment 1

[0096] The modeling and intelligent design method of a microstrip direct coupling filter provided in this embodiment, such as figure 1 shown, including the following steps:

[0097] Step S1, determining the filter structure and initial design size, and obtaining the S-parameters of the initial filter based on measurement or electromagnetic simulation;

[0098] In this step, determine the filter structure such as figure 2As shown, the initial design dimensions are shown in Table 2, and the S parameters (scattering parameters) of a fifth-order microstrip direct coupling filter are obtained based on electromagnetic simulation, and the S parameters cover the working frequency band of the microstrip direct coupling filter;

[0099] Step S2, using an optimization algorithm to calculate dephasing loading factors α and β for the S parameters obtained in step S1;

[0100] (1) Initialize the dephasing loading factors α and β, set the initialization range of α to π [0.9, 1.1], and the...

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Abstract

The invention discloses a modeling and intelligent design method of a micro-strip direct coupling filter. The method comprises the following steps: acquiring an S parameter of an initial filter; calculating de-phase loading factors alpha and beta by adopting an optimization algorithm; obtaining a pole P and a residue R through vector fitting calculation; carrying out full-standard coupling matrixsynthesis to obtain a filter coupling matrix M; adopting numerical iteration decoupling transformation to obtain a decoupling matrix Md meeting a decoupling transformation condition; determining design sizes of multiple groups of filters, obtaining S parameters of the filters based on measurement or electromagnetic simulation, extracting a decoupling matrix according to the steps, and establishinga space mapping model of the design sizes and the decoupling matrix; adjusting decoupling matrix elements of the initially designed filter through an optimization algorithm according to the expecteddesign value to obtain a decoupling matrix M<d-opt> of a filter coupling matrix close to the expected design value; and calculating a design parameter L according to the decoupling matrix M<d-opt> byutilizing the space mapping model.

Description

technical field [0001] The invention relates to the technical field of radio frequency microwave modeling and simulation design, in particular to a modeling and intelligent design method of a microstrip direct coupling filter. Background technique [0002] In the theoretical research and design of microwave filters, planar direct-coupled microwave filters are still the most frequently used filters in microwave systems because of their simple structure. The general design process is to start from the ideal coupling matrix, combine the index and the actual engineering structure, and use a single resonator eigenmode to find the resonator length of the actual engineering structure. The initial value of the gap between the resonators, the initial value of the feeder position is found through the group delay. [0003] However, due to the cross-coupling that is not described by the ideal direct coupling matrix in the actual engineering structure, this design process leads to two p...

Claims

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Application Information

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IPC IPC(8): G06F30/20
Inventor 不公告发明人
Owner SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP
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