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High linearity antenna swapping circuitry

  • US 9,735,850 B2
  • Filed: 03/29/2016
  • Issued: 08/15/2017
  • Est. Priority Date: 06/17/2015
  • Status: Active Grant
First Claim
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1. Radio frequency (RF) front end circuitry comprising:

  • transceiver switching circuitry;

    antenna swapping circuitry comprising;

    a first pole and a second pole;

    a first throw and a second throw; and

    a first switching element coupled between the first pole and the first throw, a second switching element coupled between the first pole and the second throw, a third switching element coupled between the second pole and the first throw, and a fourth switching element coupled between the second pole and the second throw; and

    multiplexer circuitry coupled between the transceiver switching circuitry and the antenna swapping circuitry; and

    switch control circuitry coupled to the transceiver switching circuitry and the antenna swapping circuitry and configured to;

    in a first low-band transmit mode, provide a primary low-band transmit signal at the first pole of the antenna swapping circuitry via the transceiver switching circuitry and forward the primary low-band transmit signal to the first throw via the first switching element in the antenna swapping circuitry; and

    in a second low-band transmit mode, provide a primary low-band transmit signal at the second pole of the antenna swapping circuitry via the transceiver switching circuitry and forward the primary low-band transmit signal to the second throw via the fourth switching element in the antenna swapping circuitry.

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