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Repeater with variable bandwidth

  • US 5,987,304 A
  • Filed: 05/30/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 05/31/1996
  • Status: Expired due to Term
First Claim
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1. A mobile telephone repeater comprising an uplink for amplifying signals from a mobile telephone to a base station and a downlink for amplifying signals from said base station to said mobile telephone, said two links being provided with a number of parallel amplifier chains, each amplifier chain being designed to pass through a specific frequency band, whereinat least one of said parallel amplifier chains comprises a filter device having a number of band pass filter units coupled in series,at least two of said band bass filter units have controllable pass bands which at least partially overlap each other, andthe centre frequency of said at least two band pass filter units are controllable so as to make the bandwidth of the resulting overlap pass band variable,whereby the effective bandwidth of the amplifier chain is controllable.

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