Premium
Design and fabrication of microstrip lowpass filter using asymmetric hairpin resonator
Author(s) -
Vaezi Ali,
Geran Gharakhili Fatemeh
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21733
Subject(s) - stopband , passband , low pass filter , microstrip , cutoff frequency , harmonics , insertion loss , elliptic filter , physics , filter (signal processing) , attenuation , transition band , resonator , materials science , band stop filter , prototype filter , band pass filter , optics , electrical engineering , engineering , voltage , quantum mechanics
In this letter, a compact microstrip lowpass filter (LPF) is designed using serial connecting of two modified asymmetric hairpin resonators. The proposed design is consists of four open‐circuited stubs that are used to suppress spurious harmonics in the stopband. The proposed filter has wide‐stop band with attenuation level better than −28 dB from 2.16 up to 26.1 GHz and sharp roll‐off. The proposed LPF has −3 dB cutoff frequency equal to 2.11 GHz, wide stopband width around 12th harmonic suppression and insertion loss less than 0.1 dB at about 85% of the passband. The excellent agreement is observed between the simulated results and measured values of the fabricated LPF.