A high directive Koch fractal Vivaldi antenna design for medical near-field microwave imaging applications

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS(2017)

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Abstract
We present a new fractal slot edge antipodal Vivaldi antenna (AVA). When compared to a conventional AVA, it simultaneously extends the low-end bandwidth limitation, mitigates the side lobe level, and increases the main lobe gain. (C) 2016 Wiley Periodicals, Inc.
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Key words
ultra-wideband antenna,antipodal Vivaldi antenna,medical near-field microwave imaging,fractal antenna
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