Method, device and storage device for extracting coupling matrix based on parameter optimization

Abstract

The invention provides a coupling matrix extraction method based on parameter optimization, device and storage device, by acquiring dissipative parameters of microwave cavity filter, calculating and removing phase offset difference of dissipative parameters, extracting polynomial coefficients E, P, F of dissipative parameters by Cauchy method, obtaining coupling matrix M of current state by generalized Chebyshev synthesis design method, and obtaining response parameter Sext; From the response parameter Sext and the dissipation parameter, the optimization objective function G is determined. Minimizing an optimization objective function G, and obtaining an optimization variable epsilon 0 corresponding to the smallest amount of G; The polynomial coefficients are synthesized with the obtainedoptimization variables, and the final coupling matrix M0 is obtained. The invention relates to a coupling matrix extracting device and a storage device based on parameter optimization, which are usedfor realizing a coupling matrix extracting method based on parameter optimization. The invention has the advantages that the number of variables for solving the phase offset and the number of optimization variables are reduced, and the invention plays an active role in the debugging of the microwave filter.

Description

technical field [0001] The invention relates to the technical field of microwave filters, in particular to a coupling matrix extraction method, device and storage device based on parameter optimization. Background technique [0002] Microwave filters are essential components in wireless communication systems. Microwave filters are widely used in wireless systems. With the rapid development of wireless communication systems, more stringent index requirements are put forward for the design of microwave devices. However, microwave filters designed according to strict specifications often fail to meet the design specifications after production due to the influence of machining accuracy and assembly errors. In order to compensate for the impact of the production process, it is often necessary to perform post-commissioning on the filter. At present, the commissioning basically relies on manual experience. The process of manual commissioning is time-consuming and cumbersome, and ...

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Problems solved by technology

[0004] The analytical method is one of the important methods to obtain the coupling matrix, the literature HsuH T, Yao HW, Zaki KA, et al. Computer-aided diagnosis and tuning of cascaded coupled resonators filters [J]. IEEE Transactions on Microwave Theory&Techniques, 2002, 50( 4): 1137-1145. And literature Hsu H T, Zhang Z, Zaki K A, et al. Parameter extraction for symmetriccoupled-resonator filters [J]. IEEE Transactions on Microwave Theory&Techniques, 2003, 50(12): 2971-2978. Earlier, the extraction of the coupling matrix was linked to the zero-pole points of the system. The disadvantage of this method is that it is only suitable for symmetrical and cascaded filters, and will not consider the influence of non-ideal factors.

Among them, the three-parameter method mainly optimizes the phase offset value, the electrical length at the center frequency, and the unloaded Q value. The disadvantage is that it is time-consuming, and it is difficult to determine the initial value range, and for non-uniform Q values, The extracted coupling matrix will not be accurate enough

[0006] The method proposed above has the following defects: 1) There are too many parameters of the phase offset, and there is no effective simplification; 2) After the Cauchy method solves the polynomial coefficients of the dissipation parameters, when the coupling matrix is ​​synthesized, the analytical method is difficult Accurately find fixed parameters

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