Wideband Antenna Design by the Stacked Koch Fractal Structures
In this paper,a novel multiband stacked microstrip antenna is introduced,which is composed of an active patch,under which three parasitic patches are placed.The geometry of each patch is shaped as a Koch fractal of third generation.The antenna feed is made of a coaxial probe,which passes through a cylindrical cavity also shaped into a Koch fractal.In order to obtain wider frequency bandwidths,the active and parasitic patches on different substrates are displaced with respect to each other.Wide and multiband frequency characteristics are achieved for the radiation patterns and impedance matching.Another configuration is proposed for modifying performance of the stacked Koch antenna(SKA),wherein a space-filling slot in the form of Hilbert fractal geometry is cut into the active patch.High-directivity microstrip antennas comprising a driven patch and at least one parasitic element placed on the same plane,operate at a frequency larger than the fundamental mode of the driven patch in order to obtain a resonance frequency with a high-directivity broadside radiation pattern.The gap defined between the driven and parasitic patched is used to control the resonance frequency where the high-directivity behavior is obtained.
Homayoon Oraizi Shahram Hedayati
Department of Electrical Engineering,Iran University of Science and Technology,Iran
国际会议
Progress in Electromagnetics Research Symposium 2011(2011年电磁学研究新进展学术研讨会)
苏州
英文
234-238
2011-09-01（万方平台首次上网日期，不代表论文的发表时间）