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Synthesis of broadband dispersive delay structures formed by commensurate C‐ and D‐sections
Author(s) -
Zhang Qingfeng,
Gupta Shulabh,
Caloz Christophe
Publication year - 2014
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20764
Subject(s) - broadband , microwave , transfer function , connection (principal bundle) , function (biology) , polynomial , series (stratigraphy) , mathematical analysis , mathematics , topology (electrical circuits) , materials science , electronic engineering , computer science , telecommunications , engineering , electrical engineering , geometry , combinatorics , paleontology , evolutionary biology , biology
We propose an exact closed‐form synthesis method for the design of broadband dispersive delay structures (DDSs) formed by the series connection of commensurate all‐pass C‐ and D‐sections. In this method, the transfer function synthesis problem is converted into a Hurwitz polynomial generation problem, where the real roots correspond to C‐sections and the complex roots correspond to D‐sections. Several design examples are provided to illustrate the proposed synthesis method. A prototype is implemented in strip‐line configuration and fabricated in LTCC technology, and the measured response is in good agreement with the prescribed and full‐wave responses. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:322–331, 2014.