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Switched-beam antenna based on novel design of Butler matrices with broadside beam

Switched-beam antenna based on novel design of Butler matrices with broadside beam

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© IEE
Published

A switched beam antenna with broadside beam based on a novel design of Butler feeding network is presented. This novel design requires only 90° hybrid couplers in the Butler matrix part with the aim of producing a broadside beam. A three-beam prototype has been fabricated. Measurements indicate that the broadside beam is primordial to avoid a shadowing area in this direction.

Inspec keywords: multibeam antennas; antenna radiation patterns; antenna feeds; adaptive antenna arrays

Other keywords: 12 GHz; Butler feeding network; broadside beam; 90° hybrid couplers; beamforming network; Butler matrices; switched-beam antenna

Subjects: Antenna arrays; Antenna accessories

References

    1. 1)
      • Novak, H.: `A single layer 8×8 Butler matrix with patch antenna', Proc. MTTS-European Wireless Conf., October 1998, Amsterdam, The Netherlands.
    2. 2)
      • Bachman, H.L.: `Smart antennas—the practical realities', Proc. IEEE Aerospace Conf., 1997, NewYork, NY, USA, p. 60–70.
    3. 3)
      • Koubeissi, M.: `Design of a new topology of Butler matrices with broadside beam for multibeam antenna', 28thESA Antenna Worksop on Space Antenna Systems and Technologies, May 2005, Noordwijk, The Netherlands, ESA/ESTEC.
    4. 4)
      • J. Butler , R. Lowe . Beamforming matrix simplifies design of electronically scanned antennas. Electron. Des. , 170 - 173
    5. 5)
      • P.S. Hall , S.J. Vetterlein . Review of radio frequency beamforming techniques for scanned and multiple beam antennas. IEE Proc. H, Microw. Antennas Propag. , 5 , 293 - 303
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