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Method and apparatus for antenna selection in a diversity antenna system for communicating with implantable medical device

  • US 20060194615A1
  • Filed: 02/28/2005
  • Published: 08/31/2006
  • Est. Priority Date: 02/28/2005
  • Status: Active Grant
First Claim
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1. A system for communicating with an implantable medical device, the system comprising:

  • a diversity antenna system including a plurality of antennas configured to transmit an outgoing signal to the implantable medical device and to receive an incoming signal from the implantable medical device;

    a transceiver adapted to transmit outgoing data frames by modulating the outgoing signal and to receive incoming data frames by demodulating the incoming signal;

    an antenna interface circuit coupled between the diversity antenna system and the transceiver, the antenna interface circuit including a switch circuit adapted to connect an antenna of the diversity antenna system to the transceiver according to an antenna selection signal; and

    an antenna control circuit adapted to produce the antenna selection signal, the antenna control circuit including;

    a fading detector coupled to the transceiver, the fading detector adapted to detect a transmission failure deemed to be associated with a null;

    an antenna selector coupled to the fading detector, the antenna selector adapted to adjust the antenna selection signal for connecting a different antenna of the diversity antenna system to the transceiver in response to a detection of the transmission failure; and

    an antenna switching timing circuit coupled between the antenna selector and the switch circuit, the antenna switching timing circuit adapted to hold the antenna selection signal while a frame of the outgoing data frames is being transmitted or a frame of the incoming data frames is being received.

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