Low Complexity Compact Lowpass Filter using T-shaped Resonator Loaded with a Stub

A novel miniaturized microstrip low pass filter (LPF) with a wide stopband and sharp roll-off is presented. The designed filter is developed by realizing a T-shaped structure loaded with a stub as a resonator and open-stubs as suppressor cells to achieve a simple structure for ease of fabrication pr...

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Bibliographic Details
Published in:IEEE access 2023-01, Vol.11, p.1-1
Main Authors: Hayati, Mohsen, Salahi, Rezvan, Akbari, Maryam, Zargari, Siamak, Abbott, Derek
Format: Article
Language:English
Subjects:
Cutoff frequency
Delays
Insertion loss
Low pass filters
Microstrip filters
Microstrip lowpass filter (LPF)
Microwave filters
Passband
Resonant frequency
Resonator filters
Resonators
stubs
suppressor cells
T shape
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Summary:A novel miniaturized microstrip low pass filter (LPF) with a wide stopband and sharp roll-off is presented. The designed filter is developed by realizing a T-shaped structure loaded with a stub as a resonator and open-stubs as suppressor cells to achieve a simple structure for ease of fabrication process. The new filter with a symmetrical structure has a 3 dB cut-off frequency of 2.15 GHz, the transition band is 123 dB/GHz from -3 dB to -40 dB, a stopband with an attenuation level better than -20 dB from 2.4 up to 22.1 GHz with a compact size of 0.0132λ g 2 . The insertion loss in the passband is less than 0.3 dB and return loss is lower than -20 dB. The filter is fabricated, and the results show agreement between the simulation and measurement.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2023.3263794