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Synthesis of a miniaturized dual‐band 3‐DB hybrid coupler through a general three‐step optimization process
Author(s) -
Gong JianQiang,
Huang QiMan,
Gao Kai
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29974
Subject(s) - multi band device , transformer , electronic engineering , microwave , microstrip , computer science , nonlinear system , engineering , electrical engineering , telecommunications , physics , quantum mechanics , voltage , antenna (radio)
Synthesis method for a novel dual‐band hybrid coupler (DBHC) is presented in this letter. The proposed DBHC is built up using a novel dual‐band impedance transformer (DBIT). The DBIT is made up of a single kernel circuit unit cell with uniform transmission lines attached to its two ends. A system of nonlinear equations dominating the DBIT performance is first established and then successfully solved with numerical method. Design charts are provided for determining the feasible DBIT parameters. With the DBIT theoretical solutions, a microstrip DBHC centered at 2.4/5.8 GHz is practically implemented, of which layout parameters are effectively resolved through a sequential three‐step optimization design process, and its compact size as well as good dual‐band operational performance has been demonstrated by fabrication and measurement, validating the proposed synthesis method. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2057–2062, 2016