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In this paper, a compact electromagnetic bandgap (EBG) structure is presented. In order to achieve the size reduction, additional equivalent capacitance and equivalent inductance are produced in three design steps. The total capacitance and inductance of the proposed structure will be increased much more than the one of the mushroom-like EBG in the literature. Dispersion diagram is presented to show...
In this paper, the design of a multi-band circularly polarized stacked microstrip antenna for low earth orbit (LEO) satellite communications and precise global positioning system (GPS) is proposed. The microstrip antenna for multi-band frequency is constructed by stacking two different square patches and circular polarization is obtained by different approaches. The top patch has a pair of truncated...
A novel compact metamaterial antenna for wireless area local network (WLAN) applications is proposed in this paper. The antenna is fed by a co-planar waveguide (CPW). Size reduction of the antenna is achieved thanks to the use of a modified conventional composite right/left handed (CRLH) model without vias. As a result, the antenna demonstrates a good size reduction in comparison with the conventional...
In this paper, a 4×4 MIMO-UWB antenna rejected WLAN band based on Electromagnetic Bandgap (EBG) is presented. The MIMO antenna is printed on a FR4_epoxy substrate with the dielectric constant of 4.4 and a thickness of 1.6 mm. A mushroom-like EBG is used to reject the WLAN frequency at 5,5 GHz. In order to reduce the mutual coupling of the antenna, a stub structure acting as multi-mode microstrip resonator...
This paper proposes a triple-band antenna based on the fractal structure of Sierpinski gasket optimized by particle swarm optimization (PSO). Relying on the highly desirable attributes including compact size, low profile, conformal and especially multiband of fractal structure, the feature of triple-band is not tricky to obtain. Implementing PSO permits the antenna to operate better. A finite element...
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