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Radio network with switching arrangement for coupling radios to a selected antenna out of a plurality of antennas

  • US 5,175,878 A
  • Filed: 02/02/1990
  • Issued: 12/29/1992
  • Est. Priority Date: 02/02/1990
  • Status: Expired due to Term
First Claim
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1. In a cellular radiotelephone system a radio antenna interconnection arrangement for enabling connection of a plurality of radio transceivers to selected ones of a plurality of antennas to accommodate changes in subscriber traffic patterns, comprising:

  • coupling circuitry for connecting to a plurality of antennas;

    a plurality of tree structured connecting circuits, each having a single terminal end and a plurality of bifurcating conducting branches deriving from the single terminal end and each of said bifurcating conducting branches having further bifurcating branches branches to provide a multiplicity of terminal ends;

    the single terminal end of each of the plurality of tree structured connecting circuits being connected to the plurality of antennas respectively through the coupling circuitry,the plurality of radio transceivers equaling the number of terminal ends of the multiplicity of terminal ends;

    a plurality of multiple lead-to-single lead controlled switching devices sufficient in number so that each one of the multiple leads is associated with a corresponding selected individual terminal end of the number of a multiplicity of terminal ends of each of the plurality of tree structured connecting circuits and having its single lead connected to and operative to enable a connection from one of the multiple leads to a specific one of the plurality of radio transceivers,signal attenuators inserted in individual transmission paths of the plurality of tree structured connecting circuits to equalize signal loss regardless of signal path length between the single terminal end and the multiplicity of terminal ends, anda switch control connected to the switching devices and responsive to a control input representative of cellular phone traffic and operative for controlling switching states of the switching devices to control connection of a particular radio transceiver to a particular antenna.

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