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A tri-band monopole antenna is presented, which employs metamaterial loading on a defected ground plane in order to create an antenna covering the WiFi and WiMAX bands. The measurements show monopolar-like radiation patterns at 3.50 GHz and 5.50 GHz and orthogonal dipolar-like patterns at 2.44 GHz. High radiation efficiencies are obtained in all three bands, despite the small size of the antenna,...
A triple-band unidirectional coplanar antenna is developed for WLAN/WiMax wireless applications. The triple-band planar antenna consists of a top-loaded dipole for the 2.4-GHz band, two longer dipoles for 3.5-GHz band, and 2 shorter dipoles for the 5-GHz band. The triple-band antenna is printed on a coplanar substrate. The antenna achieves a similar directional radiation pattern at all of the three...
A printed dipole antenna with a parasitic element of dual-band operation is proposed for WiMAX applications. The lower-operating band is obtained from dipole arms. By using the technique of coupling dipole arms and a parasitic element is proved to form a dual-band operation. The proposed antenna was successfully implemented and verified. It also has a compact size and good radiation performances.
A printed electrically small loop-loaded dipole antenna is upgraded to radiate dual-band isotropic patterns with compelling compactness. The proposed technique can be easily extended for multi-band or reconfigurable designs. Simulation of a 0.1lambda antenna shows peak deviations of radiation power density pattern in the full space are below 4.0 dB for both bands.
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