Abstract
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 er = 4.33, loss tangent tanδ = 0.0025 and thickness, ts = 1.5 mm. The measured results are in well agreement with simulations. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1315–1319, 2016
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