Stepped and Hairpin Combined Wideband Bandpass Filter for ISM Band
Abstract
This work explains the design of wideband bandpass filter for ISM 2.4 GHz band. 800 MHz of filter bandwidth is attained without compromise for insertion loss. FR4 material is used as substrate with dielectric constant 4.4 and height 1.6mm. Return loss at center frequency is approximately -34 dB and the insertion loss varies between of 0.7 to -1 dB which found to be stable in 800 MHz bandwidth range. In this combination of hairpin and stepped impedance is used to design the proposed filter.
References
[6] Steven K. Jones, “The Evolution of Modern The Evolution of Modern UWB Technology: A Spectrum Management Perspective”, FCC/OET Laboratory Technical Research Branch May 11, 2005 [7]Anil Kamma, Swapnil R. Gupta, Gopi S. Reddy, and Jayanta Mukherjee, “Multi-Band Notch UWB Band Pass Filter With Novel Contiguous Split Rings Embedded In symmetrically Tapered Elliptic Rings”, Progress In Electromagnetics Research C, Vol. 39, 133-148, 2013. [8] Jia-Sheng Hong, M. J. Lancaster, “Microstrip Filters for RF/Microwave Applications”, New York: John Wiley & Sons, 2001 [9] David m. Pozar, “Microwave Engineering”, Second edition,Wiley publication [10] Wensong Wang, Shuhui Yang, Yinchao Chen, “Experimental Design on Microstrip Line Bandpass Filters for WCDMA”, Multimedia Technology (ICMT), 2011 International Conference on, vol., no., pp.3054,3057, 26-28 July 2011
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