A compact dielectric resonator antenna for ultrawideband vehicular communication applications is proposed. Two cylindrical dielectric resonators are asymmetrically located with respect to the center of an offset rectangular coupling aperture, through which they are fed. Optimizing the design parameters results in an impedance bandwidth of 21%, covering the range from 5.9 to 7.32 GHz in the lower-band and a 53% relative bandwidth from 8.72 to 15 GHz in the upper-band. The maximum achieved gain is 12 dBi. Design details of the proposed antenna and the results of both simulations and experiment are presented and discussed.
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Abstract-The aim of this work is to introduce the application of wavelet in Electromagnetic Scattering and making improvement in the moment method development. The conventional moment method basis and testing functions are used to digitalize the integral equations of the electric or magnetic field, resulting in dense matrix impedance. By using the wavelet expansion, wavelets as basis and testing functions, a sparse matrix is generated from the previous moment method dense matrix, which may save computational cost. Here application has been made upon two types of two dimensional antennas, which are circular cylindrical antennas and parabolic reflector antennas. Results are compared to the previous work done and published, excellent results are obtained.
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