Radio frequency switch circuit

  • US 9,876,496 B2
  • Filed: 11/30/2015
  • Issued: 01/23/2018
  • Est. Priority Date: 03/25/2015
  • Status: Active Grant
First Claim
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1. A radio frequency switch circuit, comprising a first switch circuit connected between a signal port and an antenna port, wherein the first switch circuit comprises:

  • a switching circuit controlled to be in a turned on or turned off state based on a gate signal to selectively pass or block a radio frequency signal between a set of terminals of the switching circuit;

    a voltage divider connected to the set of terminals of the switching circuit and being configured to output intermediate voltage between the set of terminals of the switching circuit by a voltage dividing node; and

    a reactance circuit connected between the voltage dividing node and a body terminal of the switching circuit,wherein the switching circuit comprises a plurality of first switches connected to each other in series,the reactance circuit is connected between the voltage dividing node of the voltage divider and a body terminal of a first switch of the plurality of first switches, andthe first switch of the plurality of first switches that is connected to the reactance circuit is provided in a position closer to the antenna port as compared to another switch of the plurality of first switches that is not connected to the reactance circuit.

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