Abstract
An antipodal Vivaldi antenna (AVA) array for fifth generation (5G) millimeter-wave (mm Wave) applications is proposed in this paper. Initially, a single element AVA is designed. Then an array with 4×1 AVA elements and a 3-dB power divider is designed on an FR-4 epoxy substrate of size 28 ×32 × 1.6 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> , Inclusion of cuts on antenna radiators improves the operating bandwidth of the array antenna. Structural modification on the feeding section of the ground plane improves impedance matching (S11), operating bandwidth and gain of the array antenna. The array antenna is designed using High Frequency Structure Simulator (HFSS). Overall operational bandwidth of the array antenna is between 22.8 – 29.1 GHz (S11 < −;10 dB) covering the n257 & n258 5G mm Wave band. The designed array antenna shows maximum gain of 8.1 dB.
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