Vivaldi Antennas for Microwave Imaging: Theoretical Analysis and Design Considerations

@article{Chiappe2006VivaldiAF,
  title={Vivaldi Antennas for Microwave Imaging: Theoretical Analysis and Design Considerations},
  author={Marco Chiappe and Gian Luigi Gragnani},
  journal={IEEE Transactions on Instrumentation and Measurement},
  year={2006},
  volume={55},
  pages={1885-1891}
}
The geometrical and electrical features of the Vivaldi antenna are studied in the light of the frequency-independent antenna theory. A scaling principle is derived for the exponential tapering of the antenna, and a closed-form model for the current distribution is provided. Such theoretical results are in good agreement with several numerical simulations performed by using the NEC2 code. Furthermore, a practical feeding system, based on a double-Y balun, is developed and tested to obtain a more… CONTINUE READING
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