Abstract
A compact asymmetric coplanar strip (ACS)-fed with Hilbert Curve Fractal Antenna (HCFA) is proposed for GSM (1.8 GHz), WiMAX (3.3 GHz) and WLAN (5.5 GHz) applications. The proposed antenna occupies a compact size of 18 × 16.5 × 1.6 mm3 involving ACS feed line with HCFA and ground plane. A low cost FR-4 epoxy is used as a substrate material having a dielectric constant of $$\left( {\upvarepsilon_{\text{r}} } \right)$$ 4.4. HCFA consists of line sectors governed in a predictable fractal order, thus it is capable of constructing multiband and shrinkage of antenna size. MATLAB program is utilized to confirm the number of fractal order. By incorporating a suitable fractal order of HCFA, it is efficient to cover a lower resonance frequency of 1.8 GHz for attaining 90% of compactness. Experimental and simulated data are examined. The proposed antenna yields a dipole pattern in the xz plane (elevation plane) and omnidirectional pattern in the yz plane (azimuthal plane).
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