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System and method for increasing the channel capacity of HVAC ducts for wireless communications in buildings

  • US 6,781,477 B1
  • Filed: 09/30/2002
  • Issued: 08/24/2004
  • Est. Priority Date: 09/30/2002
  • Status: Active Grant
First Claim
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1. A system for transmitting wireless communications within ductwork, comprising:

  • a plurality of transmitter devices for introducing electromagnetic radiation into the ductwork such that the ductwork acts as a waveguide for the electromagnetic radiation, said transmitter devices comprising a transmitter array, wherein the transmitter devices are configured to introduce the electromagnetic radiation using multiple propagation modes;

    a plurality of receiver devices for detecting the electromagnetic radiation within the ductwork, said receiver devices comprising a receiver array; and

    a distribution circuit in communication with the transmitter array for merging the contents of one or more data channels into a plurality of data streams for processing the data streams to generate corresponding communication signals suitable for wireless transmission, and for transmitting the communication signals to the transmitter array.

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