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Erschienen in:
2014 | OriginalPaper | Buchkapitel
3. Microstrip Hairpin Bandpass Filter with Improved Out of Band Performance
verfasst von : Dibakar Yadav, Tamasi Moyra, Kaushik Debbarma
Erschienen in: Emerging Trends in Computing and Communication
Verlag: Springer India
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Abstract
This paper presents an microstrip bandpass filter using folded hairpin resonators with improved out of band performance. The 5 pole hairpin filter has a centre frequency of 2 GHz with a Fractional Bandwidth (FBW) of 0.2. The filter performance has been improved using a combination of Defected Ground Structure (DGS) and Defected Microstrip Structure (DMS) in the feed line to remove the spurious passband extending from 3.1 to 4 GHz. The combination of DGS and DMS provides a relatively wide stopband and at the same time has a steep rising and falling edge skirts so as to minimize the distortion in the actual passband. The structure has been designed using RT/Duroid 6006 substrate with a height 1.27 mm and dielectric constant 6.15. The proposed structure has been simulated by Method of Moment (MoM) based IE3D electromagnetic simulator. Finally, the filter exhibits a good bandpass response suitable for use in modern microwave and millimeter wave communication.