Compact Multi-Resonant Patch Antenna with Fractal Slots Inspired by Smith Chart Configuration
This paper describes the design and analysis of a multi-resonant compact patch antenna with fractal slots on the
basis of Smith Chart geometry for indoor communication systems. A (70mm x 70mm x 4 mm) single circular patch antennas
with periodic fractals in the form of combined r and x circles is capable of resonating at some desired sub-bands starting
from GPS to WI-MAX with good enough directional characteristics greater than 3 dB in average within the whole frequency
band. The dielectric material used for the proposed Microstrip patch antenna is Rogers RO3006 with dielectric constant of
6.15 and the patch is made up of perfect electric conductor (PEC). The proposed fractal geometry possesses multiband
behavior at 1.35 GHz, 1.52 GHz, 2.2 GHz, 2.55 GHz, 3 GHz, 3.47 GHz 3.66 GHz, 4 GHz and ultra-wideband from 4.16
GHz till 6 GHz. In comparison with the already existing antenna systems in the wireless market for similar purposes, the
proposed antenna has considerably shown better performance and supplementary compactness which makes it competitive
among other antenna models.
Keywords - Multi-Resonant; Compact Patch Antenna; Fractal Geometry; Smith Chart; Sub-Band.