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Design and validation of low‐pass filter using microstrip stub and defected ground structure
Author(s) -
Tamasi Moyra,
Santanu Das,
Susanta Parui
Publication year - 2013
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.27361
Subject(s) - stub (electronics) , microstrip , monolithic microwave integrated circuit , microwave , stopband , electronic engineering , engineering , low pass filter , rfic , electrical engineering , insertion loss , filter (signal processing) , band pass filter , materials science , radio frequency , telecommunications , amplifier , cmos
In this article, a compact microstrip low‐pass filter using conventional elliptical headed dumbbell‐shaped defected ground structure (DGS) is presented.The proposed structure with main dimension parameters has been analyzed as a design guide, which can be used to fabricate the filter in future. The H‐shape open stub increases the equivalent parallel capacitance to improve the out‐band suppression. The proposed LPF shows low cut‐off frequency response, low insertion loss, sharp transition, and fairly good rejection in stop band. For the five‐array DGS filter, including stubs provides the rejection in stop band from 2.8 GHz to higher frequencies. DGSs have shown increasing potential for implementation in different applications: microwave integrated circuit (MIC), monolithic microwave integrated circuit (MMIC), and radio frequency integrated circuit (RFIC). They provide sharp, distinct electromagnetic band‐gap, and high slow wave factor, which lead to smaller size circuits and takes lots of engineering challenges. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:571–573, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27361