Circular array of wideband 3D Vivaldi antennas

This communication presents a novel 3D Vivaldi antenna array with 4∶1 bandwidth without the need for balun feeding. A circular array of 8 elements of this 3D Vivaldi antenna is simulated using the Array Scanning Method applied to Method of Moments. It is found that connecting the antennas provides a smoother frequency response. The array is well suited for wideband direction finding with good polarimetric sensitivity. Its calibration made easy by the circular symmetry of the structure.

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