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DUPLEXER

  • This topic has 11 replies, 1 voice, and was last updated 13 years ago by deepak pardeshi.
Viewing 12 posts - 1 through 12 (of 12 total)
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  • #53838 Reply
    KONGAS
    Guest

    HI.
    I AM A “ROOKIE” ON RF.

    CAN ANYBODY TELL ME THE DIFFERENCES BEWTEEN DUPLEXER, DIPLEXER AND COMBINER, WITH ITS RESPECTIVE USAGES.

    TKS A LOT

    #53839 Reply
    pix
    Guest

    kongas,

    diplexer = duplexer = putting two signals with very different frequency bands onto the same feeder.
    For instance : Tx and Rx signals of a TRX GSM900 onto one feeder.
    And then the Tx/Rx of GSM900 with Tx/Rx of DCS1800.

    combiner = putting two signals with similar frequencies onto one feeder.
    For instance each Tx of 2 TRX GSM900 onto the same feeder. Both frequencies are so close to each other (< 100 MHz apart) that a combiner is needed. Combiner introduces more than 3dB loss Duplexer introduces less than 0.5dB loss.

    #53840 Reply
    kongas
    Guest

    i´ve heard something about 2×2 or 4×4 combiners. what does these numbers stand for?

    and i´ve seen some projects that consider both DIplexers and DUplexers.
    is it exactly the same element?

    do you have any document to send?

    tks a lot

    #53841 Reply
    pix
    Guest

    a duplexer is a special diplexer :
    A diplexer is called a duplexer when it connects a receiver and transmitter to the same antenna. In that case, the antenna is part of the multiplexed communications channel, so only one diplexer is needed. The design requirements for that duplexer are often severe: the receive and transmit frequency bands are often closely spaced and lots of isolation is required.
    (wikipedia)

    a diplexer is the generic name for this kind of device.

    #53842 Reply
    pix
    Guest

    2×2 and 4×4, i don’t know what this is.
    some devices contain actually 2 diplexers, so there are 4 inputs and 2 outpus. Especially useful for biband X-polar antennas.

    #53843 Reply
    KONGAS
    Guest

    for 2X2 and 4×4 i referred to the combiners. not the duplexers.
    concerning the documents, is there any you can send?

    #53844 Reply
    pix
    Guest
    #53845 Reply
    KONGAS
    Guest

    ok and Tks!!!
    but most of these links will lead me to data sheets wont´t them?
    i also would like to read some more technical info. don´t you have them?
    tks again

    #53846 Reply
    pix
    Guest

    from RFS site, you can find some good explanations in the pages before the data specs.
    but what kind of explanations do you need about duplexers ?
    how to build them ?

    #53847 Reply
    Kongas
    Guest

    actually, i´ve seen other information such as WBC 2:1, hybrid and cavity … i´d like to see more about projects, how and where combiners, duplexers and diplexers may take place.

    #53848 Reply
    pix
    Guest

    khongas,

    if you’re really interested into these kind of devices (which you look like you are !), you should join an electronic forum. I don’t think this place will help you much.

    Don’t hesitate to send emails to these companies, they might reply to you.

    Regards,
    PIx

    #53849 Reply
    deepak pardeshi
    Guest

    HI.
    I AM deepak

    CAN ANYBODY TELL ME THE DIFFERENCES BEWTEEN DUPLEXER, DIPLEXER AND COMBINER, WITH ITS RESPECTIVE USAGES.

    TKS A LOT

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