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Compact microstrip low‐pass filter with sharp selection characteristics using triple novel defected structures for UWB applications
Author(s) -
Faraghi Ahmad,
Ojaroudi Mohammad,
Ghadimi Noradin
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.28248
Subject(s) - microstrip , strips , microwave , cutoff frequency , filter (signal processing) , low pass filter , transmission (telecommunications) , stopband , materials science , electronic engineering , cutoff , optoelectronics , band pass filter , acoustics , topology (electrical circuits) , electrical engineering , engineering , physics , telecommunications , composite material , quantum mechanics
In this article, a novel band‐stop filter using defected ground structure (DGS) and defected microstrip structure (DMS) with triple T‐shaped slot and a pair of protruded T‐shaped strips inside the triple rectangular slots is presented. Using these DGS and DMS slots, a quasielliptic low‐pass filter (LPF) was designed, fabricated, and tested. The transmission zeros of the slots can be easily controlled by changing the protruded T‐shaped strip and slot dimensions, without changing the area taken by the structure. The experimental results show good agreement with simulation results and demonstrate that excellent stop‐band performance could be obtained through the proposed LPF. The filters have a cutoff frequency of about 3.14 GHz. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1007–1010, 2014