Null-steering antenna for mobile communication

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Null-steering antenna for mobile communication

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© The Institution of Electrical Engineers
Published

The letter describes an antenna system for communication with mobiles. It provides omnidirectional coverage in the horizontal plane, plus a directional null which may be electronically steered in azimuth to minimise unwanted interference. The system uses a 5-element circular array with a simple feed network and a single phase shifter to control the null direction. Experimental results are quoted for a system capable of operating over a band of 120 to 190 MHz.

Inspec keywords: mobile radio systems; antenna feeders; antenna arrays; phase shifters

Other keywords: simple feed network; omnidirectional coverage; null steering antenna; single phase shifter; 120 to 190 MHz; 5-element circular array; mobile communication

Subjects: Antenna arrays; Mobile radio systems

References

    1. 1)
      • I.D. Longstaff , P.E.K. Chow , D.E.N. Davies . Directional properties of circular arrays. Proc. IEE , 6 , 713 - 718
    2. 2)
      • D.E.N. Davies , J.C. Lim . Synthesis of a single null response in an otherwise omnidirectional pattern using a circular array. Proc. IEE , 4 , 349 - 352
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19760097
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