A High Selectivity and Small Sized Double Fold Microstrip Hairpin Line Bandpass Filter for L-Band RF/Wireless Communication Systems
Jagdish Shivhare1, B. V. R. Reddy2

1Jagdish Shivhare, Department of Electrical Electronics and Communication Engineering, ITM University, Gurgaon India.
2B.V. R. Reddy, Department of Engineering & Technology, Guru Govind Singh Indraprashth University, Dwarka, Delh, India.
Manuscript received on 14 June 2015 | Revised Manuscript received on 23 June 2015 | Manuscript Published on 30 June 2015 | PP: 72-80 | Volume-5 Issue-1, June 2015 | Retrieval Number: A2113065115/15©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This technical paper presents a new type of double folded hairpin line microstrip bandpass filter with high selectivity, low cost and 40-50% reduction in size compared to a conventional hairpin line bandpass filter. The filters are not only compact size due to the slow-wave effect, but also have a wider upper stopband resulting from the dispersion effect. These attractive features make the resonator filters hold promise for RF/wireless, mobile communications and other ground and space applications. The design topology has the advantage of desirable narrowband, high selectivity, reasonable return loss, small sized and low cost microstrip filters, make the design more simpler for wider applications in the modern wireless radio communication systems. The expected frequency responses have been simulated by using the Agilent-make ADS and IE3D-Zealand softwares. The measured and simulated results show good agreement.
Keywords: Folded-Hairpin Line Resonator, Microstrip Filters, Slow Wave, Cross Couplings, Dielectric Constant.

Scope of the Article: Communication