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A Vivaldi antenna or Vivaldi aerial or tapered slot antenna is a co-planar broadband-antenna, which can be made from a solid piece of sheet metal, a printed circuit board, or from a dielectric plate metalized on one or both sides.
The feeding line excites an open space via a microstrip line or coaxial cable, and may be terminated with a sector-shaped area or a direct coaxial connection. From the open space area the energy reaches an exponentially tapered pattern via a symmetrical slot line.
Vivaldi antennas are useful for any frequency, as all antennas are scalable in size for use at any frequency. Printed circuit technology makes this type antenna cost effective at microwave frequencies exceeding 1 GHz.
Advantages of Vivaldi antennas are their broadband characteristics (suitable for ultra-wideband signals ), their easy manufacturing process using common methods for PCB production, and their easy impedance matching to the feeding line using microstrip line modeling methods .
- Peter J. Gibson: The Vivaldi Aerial, 9th European Microwave Conference Proceedings, Brighton, 1979, p. 101–105.
- Milligan, Thomas (2005). Modern antenna design (Second ed.). Hoboken, N.J.: John Wiley & Sons, Inc. p. 512. ISBN 9780471457763. OCLC 85820949.
- De Oliveira, A. M.; Perotoni, M. B.; Kofuji, S. T.; Justo, J. F. (2015). "A palm tree antipodal Vivaldi antenna with exponential slot edge for improved radiation pattern". IEEE Antennas Wirel. Propag. Lett. 14: 1334. doi:10.1109/LAWP.2015.2404875.
- Pandey, Anil (2019). Practical Microstrip and Printed Antenna Design. USA: Artech House. p. 480. ISBN 9781630816681.
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- "Characterization of Vivaldi antennas utilizing a microstrip-to-slotline transition" (PDF).
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- "Vivaldi antenna".
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