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Modeling and characterization of spiral resonators embedded in suspended microstrip line for application in low‐loss diplexer
Author(s) -
Gorski Przemyslaw,
Jaworski G.
Publication year - 2014
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.28029
Subject(s) - diplexer , resonator , microstrip , band pass filter , electronic engineering , filter (signal processing) , microwave , transceiver , bandwidth (computing) , spiral (railway) , insertion loss , acoustics , materials science , engineering , optoelectronics , electrical engineering , physics , telecommunications , cmos , mechanical engineering
This article presents the design and realization of anovel, low‐loss, compact diplexer providing high selectivity and verygood separation between very narrow spaced working channels for application in the ESEO satellite transceiver. The diplexer is based on spiral resonators (SR) embedded in the suspended microstrip line and forming band‐stop filter structures. For design purpose, the equivalent‐circuit model of the SR resonator embedded in microstrip line is derived, analyzed, and verified. The influence of the model parameters on S 11 and S 21 characteristics has been studied and discussed. The double stage filter with embedded SR resonators has been described. A novel method is proposed to precisely control the filter selectivity, bandwidth, and the position of S 11 minimum. The filter has been applied in the diplexer design. The measured performance of the manufactured diplexer prototype exhibits good properties and good agreement with the simulation results. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:131–135, 2014