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New class of primary-feed antennas for use with offset parabolic-reflector antennas

New class of primary-feed antennas for use with offset parabolic-reflector antennas

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© The Institution of Electrical Engineers
Published

In many practical applications the performance of an offset parabolic-reflector antenna is limited by the offset reflectors' depolarising and beam-squinting properties. The letter describes a new class of primary-feed antennas which overcome these limitations. The new primary-feed types offer a significant improvement in the crosspolar and beam-squinting properties of the offset reflector antenna, without adding significantly to the complexity or mass of the primary-feed system.

Inspec keywords: reflector antennas; antenna feeders; antenna radiation patterns

Other keywords: crosspolar properties; offset parabolic reflector antennas; beam squinting properties; primary feed antennas

Subjects: Waveguide and cavity theory; Antenna accessories

References

    1. 1)
      • A.W. Rudge . Multiple-beam antennas: offset reflectors with offset feeds. IEEE Trans. , 317 - 322
    2. 2)
      • N.A. Adatia , A.W. Rudge . Beam-squint in circularly polarised offset-reflector antennas. Electron. Lett. , 513 - 515
    3. 3)
      • Chu , Ru-Shing , R.H. Turrin . Depolarisation properties of offset reflector antennas. IEEE Trans. , 339 - 345
    4. 4)
      • P.D. Rotter . A new horn antenna with suppressed sidelobes and equal beamwidths. Microwave J. , 71 - 78
    5. 5)
      • Rudge, A.W., Adatia, N.: `Improved primary-feed antennas for offset parabolic-reflector antennas', British Patent Application 44505/75, October 1975.
    6. 6)
      • C. Dragone , D.C. Hogg . The radiation pattern and impedance of offset and symmetrical near-field Cassegrainian and Gregorian antennas. IEEE Trans. , 472 - 475
    7. 7)
      • Rudge, A.W., Foster, P.R.: `Study of the performance and limitations of multiple-beam antennas', ESTEC Contract 2277/74 HP, 1975.
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