Microstrip Hairpin Bandpass Filter with Improved Out of Band Performance

  • Dibakar Yadav
  • Tamasi Moyra
  • Kaushik Debbarma
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 298)


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.


Hairpin resonators DGS DMS Bandpass filter Stopband 


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Copyright information

© Springer India 2014

Authors and Affiliations

  1. 1.National Institute of TechnologyAgartalaIndia

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