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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
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.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
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.
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.for 2X2 and 4×4 i referred to the combiners. not the duplexers.
concerning the documents, is there any you can send?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 againfrom 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 ?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.
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,
PIxHI.
I AM deepakCAN ANYBODY TELL ME THE DIFFERENCES BEWTEEN DUPLEXER, DIPLEXER AND COMBINER, WITH ITS RESPECTIVE USAGES.
TKS A LOT
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