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In this paper, an antenna design has been proposed which supports multi-band frequency ranges for handheld devices i.e., WLAN (5.2 GHz), Bluetooth (2.4 GHz), etc. The input impedance of the antenna is 50Ω. FR4 is used as a substrate having permittivity 4.4. The proposed design has a compact size which is compatible with the present handheld devices. Planar Inverted-F Antennas or simply...
In present paper two key properties of two dimensional electromagnetic structures (2D-EBGs) are presented. They are named as (i) PMC (Perfect Magnetic Conductor) and (ii) Band Reject Region are investigated. The architecture of 2DEBG considered is of square mushroom shaped. In later section the radiation characteristics of monopole antenna is tested over this 2D-EBG. This testing is performed in two...
This paper presents a pattern synthesis method based on two powerful tools of the Evolutionary computing i.e Differential Evolution, Invasive weed optimization and Firefly technique, to provide a significant side lobe reduction. The Antenna elements are embedded on a hemispherical array that leads to one of the geometry of a conformal shape. The array elements are excited with uniform amplitude excitation...
A dielectric resonator antenna (DRA) of half-cylindrical geometry made of a high permittivity (epsir = 69) ceramic material is investigated. The antenna is fed with a simple 50 Omega microstrip transmission line. The radiation characteristics of the DRA are broad and stable across a matching band of 2.32 to 2.5 GHz that includes the 2.4 GHz WLAN band (2.4 to 2.484 GHz). The DRA offers a maximum gain...
A coaxial fed hexagonal dielectric resonator antenna (HDRA) for multifrequency operation is developed. The antenna exhibits multiple resonances with same polarization. The return loss, impedance and radiation characteristics of the antenna are measured and are found suitable for multiple frequency applications
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