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Aperture coupling in cylindrical dielectric-rod antennas

Aperture coupling in cylindrical dielectric-rod antennas

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Computed and measured data show that mutual coupling between the launcher and rod-end apertures of a uniform cylindrical dielectric-rod antenna is responsible for certain second-order effects in the radiation pattern. The synthesis of a smooth tapered dielectric antenna by a stepped profile and complications arising from interstep coupling are also discussed.

Inspec keywords: linear antennas; antenna theory

Subjects: Antenna theory

References

    1. 1)
      • J.R. James . Theoretical investigation of cylindrical dielectric-rod antennas. Proc. IEE , 309 - 319
    2. 2)
      • James, J.R.: `Aperture coupling in surface wave antennas', RT33, Tech. Note, 1967.
    3. 3)
      • Cooley, A.I., Ishimaru, A.: `Scattering of a surface wave from an abrupt change in thickness on a dielectric slab', 105, Tech. Report, 1966, p. 2.
    4. 4)
      • James, J.R.: `Some further properties of cylindrical dielectric-rod antennas', RT37, Tech. Note, 1967.
    5. 5)
      • V.H. Rumsey . Reaction concept electromagnetic theory. Phys. Rev. , 1483 - 1491
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      • J.H. Richmond . A reaction theorem and its applications to antenna impedance calculations. IRE Trans. , 515 - 520
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      • M.K. Hu . Near-zone power transmission formulas. IRE Nat. Convention Record , 128 - 138
    8. 8)
      • A.F. Kay . Near field gain of aperture antennas. IRE Trans. , 586 - 593
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      • J.W. Sherman . Properties of focussed apertures in the Fresnel region. IRE Trans. , 399 - 408
    10. 10)
      • T. Soejima . Fresnel gain of aperture aerials. Proc. IEE , 1021 - 1027
    11. 11)
      • A.W. Snyder . Surface mode coupling along a tapered dielectric rod. IEEE Trans. , 821 - 822
    12. 12)
      • Herbison-Evans, D.: `Some dielectric-rod antenna studies', Report 67003, 1967.
    13. 13)
      • R.F. Harrington . Antenna excitation for maximum gain. IEEE Trans. , 896 - 903
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