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Systems and methods for implementing a distributed antenna system in a radio frequency integrated circuit

  • US 8,699,982 B2
  • Filed: 03/27/2012
  • Issued: 04/15/2014
  • Est. Priority Date: 03/27/2012
  • Status: Active Grant
First Claim
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1. A remote antenna unit in a distributed antenna system, the antenna unit comprising:

  • an uplink integrated circuit, wherein the uplink integrated circuit receives a radio frequency signal, the uplink integrated circuit comprising;

    an uplink synthesizer configured to provide an uplink oscillating signal in at least one frequency;

    an uplink mixer stage coupled to the uplink synthesizer, the uplink mixer stage configured to mix the uplink radio frequency signal with the uplink oscillating signal to produce an uplink intermediate frequency signal; and

    an uplink control interface configured to receive uplink commands that control the frequency of the uplink oscillating signal;

    the antenna unit further comprising a downlink integrated circuit that is electrically isolated from the uplink integrated circuit, wherein the downlink integrated circuit receives a downlink intermediate frequency signal, the downlink integrated circuit comprising;

    a downlink synthesizer configured to provide a downlink oscillating signal in at least one frequency;

    a downlink mixer stage coupled to the downlink synthesizer, the downlink mixer stage configured to mix the downlink intermediate frequency signal with the downlink oscillating signal to produce a down link radio frequency signal;

    a downlink control interface configured to receive downlink commands that control the frequency of the downlink oscillating signal; and

    at least one clock configured to provide at least one reference frequency to the uplink synthesizer and the downlink synthesizer.

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