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A new logarithmic method to minimize the size of low‐pass filter using multilayer and defected ground structure technique
Author(s) -
Boutejdar Ahmed,
Omar Abbas,
Burte Edmund,
Batmanov Anatoliy,
Mikuta Reinhard
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.26352
Subject(s) - microstrip , ground plane , microwave , filter (signal processing) , electronic engineering , low pass filter , logarithm , capacitor , topology (electrical circuits) , electrical impedance , engineering , electrical engineering , mathematics , telecommunications , mathematical analysis , voltage , antenna (radio)
Abstract A novel three‐pole low‐pass filter is designed using metal‐loaded slots etched in the ground plane, and low impedance microstrip line as microstrip capacitor. An equivalent circuit model of a defected ground structure (DGS) is applied to study the characteristics of DGS. Parameters of the model are extracted from the EM simulation results by matching it to a one‐pole Butterworth low‐pass filter. The theory is validated against the commercial Microwave Office. The new low‐pass filter (LPF) is very compact and provides sharp transition band and a wide stop‐band. Additional to the new mathematical method (natural logarithm function), a multilayer technique will be used to improve the compactness of the structure. Finally, the proposed structure is implemented, and the measurement results are found to be in good agreement with the simulation results. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:2561–2566, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26352