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Hybrid-coupler-based radio frequency multiplexers

  • US 10,476,530 B2
  • Filed: 09/30/2016
  • Issued: 11/12/2019
  • Est. Priority Date: 10/12/2015
  • Status: Active Grant
First Claim
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1. A radio frequency multiplexer, comprising:

  • a plurality of ports including a common port, a first port for a first frequency band, a second port for a second frequency band, and a third port for a third frequency band;

    a plurality of quadrature hybrid couplers (QHCs) including a first QHC, a second QHC, and a third QHC; and

    a plurality of pairs of filters including a first pair of filters and a second pair of filters, wherein;

    the first pair of filters is coupled between the first QHC and the second QHC, and is configured to pass the second frequency band and not pass the first frequency band and the third frequency band,the second pair of filters is coupled between the first QHC and the third QHC, and is configured to pass the third frequency band and not pass the first frequency band and the second frequency band,the first QHC, the first pair of filters, and the second QHC are configured to separate the first frequency band from the common port to the first port, and separate the second frequency band from the common port to the second port, andthe first QHC, the second pair of filters, and the third QHC are configured to separate the first frequency band from the common port to the first port, and separate the third frequency band from the common port to the third port.

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