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Design of an antipodal Vivaldi antenna with fractal‐shaped dielectric slab for enhanced radiation characteristics
Author(s) -
Bhattacharjee Anindita,
Bhawal Abhirup,
Karmakar Anirban,
Saha Anuradha
Publication year - 2020
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.32274
Subject(s) - vivaldi antenna , fractal antenna , optics , materials science , coaxial antenna , radiation pattern , antenna efficiency , antenna factor , directivity , antenna (radio) , physics , acoustics , telecommunications , engineering
A conventional antipodal Vivaldi antenna (CAVA) with fractal‐based parallel dielectric slabs is proposed for different wideband applications. At first, a CAVA is designed as a reference antenna, and then Koch fractal‐shaped dielectric slabs are placed parallel to CAVA. The presence of fractal‐shaped dielectric slabs increases the operating bandwidth, and also the field coupling between the antenna arms enhances the gain and directivity of the antenna. The optimized structure of the antenna produces | S 11 | < −10 dB frequency band from 4.2 GHz to 50 GHz. The total dimension of the fabricated prototype of the proposed antenna is 122 × 66 × 7.692 mm 3 .