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Numerical and experimental analysis of circular-end wire bow-tie antennas over a lossy ground

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3 Author(s)
Lestari, A.A. ; Int. Res. Centre for Telecommun.-transmission & Radar, Delft Univ. of Technol., Netherlands ; Yarovoy, A.G. ; Ligthart, L.P.

This paper presents a numerical and experimental analysis of a wire bow-tie antenna situated horizontally near a lossy ground. The antenna is basically an array of identical wire dipoles having a common feed point and equal angular separation between two neighboring wires. This antenna is particularly suitable for ultrawide-band applications as it possesses a wideband property and allows a simple realization of resistive loading. It also provides a possibility to easily vary the antenna flare angle for the purpose of antenna matching or to adjust its footprint. In this work a theoretical model of the antenna is developed and verified experimentally. The wires are modeled as a tape-like structure by triangular patches and the antenna is analyzed using a mixed-potential integral equation formulation. Moreover, time-domain solutions are computed using the Fourier transformation, and a time-window technique is employed to calculate the antenna characteristic impedance. Using the model a comprehensive analysis of the antenna performance is carried out.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:52 ,  Issue: 1 )

Date of Publication:

Jan. 2004

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