Abstract
This paper introduces a new compact Balanced Antipodal Vivaldi Antenna (BAVA) with asymmetrically meshed ground, square shaped metallic labyrinth and dual scale edge treatment. The proposed antenna operates from 4 GHz to 18 GHz with S11 less than −10 dB, 127.27% fractional bandwidth and realizes greater than 4.01 dBi gain throughout the functioning band of frequency and achieves a maximum of 13.46 dBi at 17 GHz. Group delay of less than 5 ns signatures are realized. Improvement of operating bandwidth through enhanced impedance matching by finely meshed pattern on the ground planes and containment of rate of change of deflection angle using quarter-wavelength labyrinth director are addressed by the proposed antenna. The maximum realized size of the antenna is 80 × 40 × 0.508mm3. In addition, consistent radiation patterns are observed at selected frequencies. Numerical analysis with a full wave simulation tool is performed to calculate the radiation characteristics of the antenna and are experimentally validated.
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