Ultra wide stop band LPF with using defected microstrip structures

Ultra wide stop band LPF with using defected microstrip structures

A novel harmonic-suppressed microstrip stepped impedance lowpass filter (LPF) using Defected Microstrip Structure (DMS) is proposed. In order to cause the spurious passband suppression, appropriate geometries of DMS resonators have etched in the low impedance sections. Due to the attenuation poles o...

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Hauptverfasser: Mallahzadeh, A. R., Rahmati, B., Alamolhoda, M., Sharifzadeh, R., Ghasemi, A. H.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Defected Microstrip Structure (DMS)
Filtering theory
harmonics suppression
Impedance
Low pass filters
Microstrip
Microstrip filters
Microwave filters
Resonator filters
stepped impedance lowpass filters
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Zusammenfassung:A novel harmonic-suppressed microstrip stepped impedance lowpass filter (LPF) using Defected Microstrip Structure (DMS) is proposed. In order to cause the spurious passband suppression, appropriate geometries of DMS resonators have etched in the low impedance sections. Due to the attenuation poles of two kinds of resonators, it is found that harmonic responses are not only suppressed effectively, but a wide stopband can be also obtained. A demonstration filter with cutoff frequency at 2.5 GHz has been designed, fabricated and measured. The proposed filter also exhibits a very wide stopband of 145% (referred to a suppression degree of 20 dB).
ISSN:2164-3342
DOI:10.1109/EuCAP.2012.6206280