"duplexer" meaning in English

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  "etymology_text": "From duplex + -er.",
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      "form": "duplexers",
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  "lang_code": "en",
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        {
          "ref": "2009, Ken-ya Hashimoto, RF Bulk Acoustic Wave Filters for Communications, →ISBN, page 119:",
          "text": "At first, making a duplexer seemed impossible, of all the filters in the cell phone, the specifications for the duplexer were by far the most stringent.",
          "type": "quote"
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        {
          "ref": "2011, Alastair D. McAulay, Military Laser Technology for Defense, →ISBN, page 272:",
          "text": "The HE11 mode emits a Gaussian beam into free space as is required for input to the quasi-optical duplexer attached to the antenna.",
          "type": "quote"
        },
        {
          "ref": "2012, TV White Space Spectrum Technologies, →ISBN:",
          "text": "A drawback in the dual duplexer design is that six channels are lost because three band gaps are required.",
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      ],
      "glosses": [
        "A device that enables communication in two directions over a single path."
      ],
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        "(electronics) A device that enables communication in two directions over a single path."
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        "physical-sciences",
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        "A accessory of some printers that automatically flips pages to print on both sides."
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        "(electronics) A accessory of some printers that automatically flips pages to print on both sides."
      ],
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  "wikipedia": [
    "duplexer"
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  "word": "duplexer"
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  "etymology_text": "From duplex + -er.",
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        },
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          "ref": "2011, Alastair D. McAulay, Military Laser Technology for Defense, →ISBN, page 272:",
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        },
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          "ref": "2012, TV White Space Spectrum Technologies, →ISBN:",
          "text": "A drawback in the dual duplexer design is that six channels are lost because three band gaps are required.",
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        "(electronics) A device that enables communication in two directions over a single path."
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