A general coupling matrix synthesis method for all-resonator diplexers and multiplexers

Yu, Y., Liu, B. , Wang, Y., Lancaster, M. J. and Cheng, Q. S. (2020) A general coupling matrix synthesis method for all-resonator diplexers and multiplexers. IEEE Transactions on Microwave Theory and Techniques, 68(3), pp. 987-999. (doi: 10.1109/TMTT.2019.2957430)

Abstract

Coupling matrix (CM) synthesis methods for all-resonator diplexers and multiplexers are far from mature. For complex coupling topologies, the existing methods are often not able to find the appropriate CMs that satisfy the S-parameter specifications. To address this challenge, a new synthesis method, which hybridizes analytical and optimization techniques, called general all-resonator diplexer/multiplexer CM synthesis (GACMS) method, is proposed in this article. The two main innovations of GACMS are: 1) an optimization framework incorporating filter design knowledge, which effectively reduces the search space for CM synthesis and 2) a new memetic algorithm-based optimizer, which tackles the challenges from the complex landscape (function characteristics) of CM synthesis problems. GACMS is tested by six complex practical problems and CMs are successfully obtained for all of them. Comparisons with the existing methods demonstrate the advantages of GACMS in terms of solution quality and robustness.

• Item Type: Articles
• Additional Information: This work was supported in part by the National Natural Science Foundation of China under Grant 61471258, in part by the Science and Technology Innovation Committee of Shenzhen Municipality under Grant KQJSCX20170328153625183, and in part by the U.K. Engineering and Physical Science Research Council under Grant EP/S013113/1 and Grant EP/M013529/1.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Liu, Professor Bo
• Authors: Yu, Y., Liu, B., Wang, Y., Lancaster, M. J., and Cheng, Q. S.
• Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: IEEE Transactions on Microwave Theory and Techniques
• Publisher: IEEE
• ISSN: 0018-9480
• ISSN (Online): 1557-9670
• Published Online: 20 February 2020