Proceedings ArticleDOI
New kinds of fractal iterated and miniaturized narrowband bandpass filters for wireless applications
V. Soni,Mithilesh Kumar +1 more
- pp 2786-2792
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TLDR
These type of microstrip fractal narrowband bandpass filters show the advantage of providing the much narrower bandwidth, more miniaturization, high Q-value and high selectivity than that of single mode resonator and conventional square patch filter.Abstract:
In this paper, some new type of compact and highly selective microstrip dual mode narrowband bandpass filters are proposed and compared for modern wireless applications. The filters are proposed by integrating the concepts of dual mode with slotted square patch resonator, Seirpinsky Carpet Fractal Geometry applied to the conventional microstrip square patch for achieving miniaturization and addition of perturbation for obtaining the bandpass characteristics. These type of microstrip fractal narrowband bandpass filters show the advantage of providing the much narrower bandwidth, more miniaturization, high Q-value and high selectivity than that of single mode resonator and conventional square patch filter. The performance of proposed filters based on Seirpinsky Carpet Fractal Geometry and dual mode slotted square patch resonator up to third iterations have been evaluated using full wave based on CST microwave studio. The simulation results show that at the same operating frequency and same substrate material, the proposed filter after third iteration provides a considerable low insertion loss, more miniaturization i.e less effective area of filter, high Q-value, high selectivity and sharper response of about 1.29% fractional bandwidth as compared to the conventional microstrip square patch filter of 2.04% fractional bandwidth. The Comparative Simulation results also show that as the number of iterations increase, the insertion loss, 3dB fractional bandwidth, compactness of filter and Q-value shall also be improved i.e the comparative study shows that these filter structures offer the better performance in terms of above mentioned parameters as compared to other types of non-fractalized filter structures.read more
Citations
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Journal ArticleDOI
Compact Dual-mode Microstrip Bandpass Filter Based on Greek-cross Fractal Resonator
TL;DR: In this paper, a geometrically symmetrical fractal structure is presented to provide an alternative approach for the miniaturization design of microstrip bandpass filters (BPFs).
Journal Article
Two parallel-coupled rings for narrow bandpass filter application
Norfishah Ab Wahab,Nabil Hidayat,Zuhani Ismail Khan,Zuhaila Mat Yasin,Nor Ashida Salim,Noriza Othman,M. Khairul M. Salleh +6 more
TL;DR: In this article, a 2nd order bandpass filter topology is presented, which employs two single mode ring resonators coupled via a quarterwavelength coupled-line to exhibit a pseudo-elliptic bandpass response.
References
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Journal ArticleDOI
An overview of fractal antenna engineering research
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TL;DR: Fractal antenna engineering has been primarily focused in two areas: the first deals with the analysis and design of fractal antenna elements, and the second concerns the application of Fractal concepts to the design of antenna arrays as discussed by the authors.
Journal ArticleDOI
Transmission-Line Properties of Parallel Strips Separated by a Dielectric Sheet
TL;DR: In this article, the shape ratio and the effective filling fraction of a sheet of dielectric material are computed in terms of exponential and hyperbolic functions, respectively, for a transmission line made of a symmetrical pair of strip conductors.
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