Journal of Xidian University ›› 2020, Vol. 47 ›› Issue (5): 130-136.doi: 10.19665/j.issn1001-2400.2020.05.017

• Information and Communications Engineering & Cyberspace Security • Previous Articles     Next Articles

Fast design method for the high-performance dual-passband filter

XU Tongtong(),XIANG Zheng   

  1. School of Communications Engineering, Xidian University, Xi’an 710071, China
  • Received:2020-03-25 Online:2020-10-20 Published:2020-11-06

Abstract:

In this paper, in order to improve the efficiency of designing the dual-passband filter, the extraction method of the coupling matrix of the dual-passband filter is studied based on the duplexer theory, and a dual-passband cavity filter is designed. First, the basic theory of the coupling matrix is analyzed, and then the method for extracting the coupling matrix based on the duplexer is studied. Finally, the corresponding coupling matrix is verified theoretically by the circuit model, and the design and simulation of the filter are performed using electromagnetic simulation software. The simulation results show that the dual-passband filter designed in this paper has the characteristics of a flexible and controllable passband, a low insertion loss, and good out-of-band rejection. The proposed method can improve the efficiency of designing the dual-passband filter.

Key words: diplexer, dual-passband filter, coupling matrix

CLC Number: 

  • TN802

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