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Novel Fibonacci spiral antenna and its miniaturization using fractals
Author(s) -
Sharma Chetna,
Vishwakarma Dinesh Kumar
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29797
Subject(s) - miniaturization , spiral antenna , fibonacci number , logarithmic spiral , antenna (radio) , radiation pattern , ground plane , optics , spiral (railway) , microwave , physics , geometry , electrical engineering , coaxial antenna , engineering , telecommunications , mathematics , mechanical engineering , discrete mathematics
This paper reports the investigation on a new spiral antenna constructed using well‐known Fibonacci sequence. Its performance has been compared first with a universal logarithmic spiral antenna (LSA) of nearly the same dimension. Next the discontinuous geometry of the proposed Fibonacci spiral antenna (FSA) has been exploited to fractalize it using Koch curve. The fractalized Koch‐FSA has nearly two‐third of physical size miniaturization while retaining antenna radiation characteristics.However like other spiral antennas, the multiband behavior of FSA is evident because of conducting ground plane just below it. The geometries of the antenna have been simulated using CST Microwave studio and fabricated over lossy FR‐4 substrate with dielectric constant ε r = 4.33, loss tangent tanδ = 0.0025 and thickness, t s = 1.5 mm. The measured results are in well agreement with simulations. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1315–1319, 2016