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Antenna switching in a communication circuit

  • US 10,374,652 B2
  • Filed: 10/01/2015
  • Issued: 08/06/2019
  • Est. Priority Date: 10/28/2014
  • Status: Active Grant
First Claim
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1. A communication circuit, comprising:

  • a first radio frequency (RF) signal path configured to transmit a first RF signal during an assigned transmit (TX) period and receive a second RF signal during an assigned receive (RX) period temporally distinct from the assigned TX period;

    a second RF signal path configured to receive the second RF signal during the assigned RX period; and

    an antenna switching circuit comprising a first antenna switch, a second antenna switch, and a third antenna switch and configured to;

    close the first antenna switch, open the second antenna switch, and open the third antenna switch to transmit the first RF signal in a first RF band during the assigned TX period via a first antenna;

    close the first antenna switch, open the second antenna switch, and open the third antenna switch to transmit the first RF signal in a second RF band during the assigned TX period via the first antenna;

    open the first antenna switch, close the second antenna switch, and open the third antenna switch to transmit the first RF signal in the first RF band during the assigned TX period via a second antenna;

    open the first antenna switch, close the second antenna switch, and open the third antenna switch to transmit the first RF signal in the second RF band during the assigned TX period via the second antenna;

    close the first antenna switch to receive concurrently the second RF signal in the first RF band and the second RF band during the assigned RX period via the first antenna;

    close the third antenna switch to receive concurrently the second RF signal in the first RF band and the second RF band during the assigned RX period via the second antenna; and

    decouple the second RF signal path from the second antenna during the assigned RX period in response to the first RF signal path being coupled to the second antenna.

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