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Apparatus for sharing an omnidirectional antenna between an IFF transponder and an IFF interrogator

  • US 8,179,302 B2
  • Filed: 06/07/2010
  • Issued: 05/15/2012
  • Est. Priority Date: 06/05/2009
  • Status: Active Grant
First Claim
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1. An apparatus for transmitting and receiving radio-frequency signals, comprising:

  • a cylindrical antenna array, which comprises an omnidirectional channel;

    an IFF interrogator connected to the cylindrical antenna array;

    an IFF transponder connected to the cylindrical antenna array;

    wherein the apparatus includes a means for sharing the omnidirectional channel between the IFF interrogator and the IFF transponder, said means having a radio-frequency switch arranged so that the omnidirectional channel is connected on transmit either to the IFF interrogator or to the IFF transponder, the radio-frequency switch connecting the omnidirectional channel on transmit to the IFF transponder by default, the IFF interrogator providing a trigger signal to the radio-frequency switch to be connected on transmit to the omnidirectional channel, the radio-frequency switch switching back to its default state when a predefined time has elapsed or the trigger signal has been removed.

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