Improved design of the Vivaldi antenna

Improved design of the Vivaldi antenna

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The Vivaldi antenna and its feeding transition is investigated. A tapered transition from microstrip to symmetric double sided slot line, fabricated on a low dielectric constant substrate, exhibits a very wide operating frequency range, with no need for a shorting hole. The parameters of the antenna which influence the constancy of beamwidth with frequency are discussed, and the ability to determine the required beamwidth by controlling the antenna length is shown.


    1. 1)
      • Gibson, P.J.: `The Vivaldi aerial', Proc. 9th European. Microwave Conference, 1979, p. 101–105
    2. 2)
      • Kolberg, E.L., Johanson, J., Thungren, T., Korzeniowski, T.L., Yngvesson, K.S.: `New results on tapered slot endfire antennas on dielectric substrate', IEEE 8th Inter. Conf. on Infrared and Millimeter Waves, 1983, U.S.A., p. F3.6/1–2
    3. 3)
      • de Ronde, F.C.: `A new class of microstrip directional couplers', Digest of Tech., Papers, 6-MTT Symp., 1970, p. 184–189
    4. 4)
      • An improved microstrip-tomicroslot transition
    5. 5)
      • Nightingale, S.J., Bates, R.N., Gibson, P.J., Chua, L.W.: `Microwave Balun', U.K., GB 2057196B,
    6. 6)
      • Use of the unbalanced slotted line in S.H.F. microcircuits
    7. 7)
      • A new integrated waveguide — microstrip transition
    8. 8)
      • Baker, D.E., van Der Neut, C.A.: `A compact, broadband, balanced transmission line antenna derived from doubleridged waveguide', APS Inter. Symp. Digest Antennas and Propag., 1982, U.S.A., 2, p. 568–571
    9. 9)
      • Endfire tapered slot antenna on dielectric substrate
    10. 10)
      • Beyer, A.: `Millimeterwave antenna in finline technique', ICAP '83, IEE Third Int. Conf. Ant. Propag., 12–15 April 1983, U.K., p. 44–46, Part 1

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