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Design of compact microstrip filter with large reject band using a new multisectioned T‐shaped defected ground structure and multilayer technique
Author(s) -
Al Sharkawy M.,
Boutejdar A.,
Abd El Aziz D.,
Galal E.
Publication year - 2011
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.26157
Subject(s) - stopband , passband , filter (signal processing) , transition band , microwave , insertion loss , electronic engineering , low pass filter , microstrip , capacitance , materials science , topology (electrical circuits) , band pass filter , optoelectronics , acoustics , prototype filter , electrical engineering , engineering , physics , telecommunications , electrode , quantum mechanics
In this article, a new compact defected ground structure (DGS) low pass filter (LPF) with wide rejection band, low insertion loss in the stopband, and sharp transition from passband to stopband is proposed . The prototype LPF is composed of three repetitive DGS elements with open stubs to act as a compensated capacitance. Each single DGS element consists of multisections of T‐shaped slots. The filter is then realized as a multilayer structure to achieve size reduction and enhance the filter response. The proposed filter has been fabricated and measured. The agreement between the simulated and measured results confirms the effectiveness of the proposed concept. Finally, multilayer LPF is transformed to band pass filter using J‐inverter method. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26157