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Differential output of RF transceiver - RF Cafe Forums
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RF_guy
Post subject: Differential output of RF transceiver
Unread
postPosted: Thu Mar 24, 2005 12:03 pm
When it is mentioned that
the output of the RF transceiver chip is differential, what does it
exactly mean?
Why can't we connect the differential output of
the RF chip directly to the antenna? and what interface is required?
What other kinds of outputs can be provided in the transceiver IC?
Thanks in advance for your comments and answers.
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Guest
Post subject: Balanced Output
Unread postPosted:
Tue Mar 29, 2005 1:59 pm
There are other names for balanced
outputs: differential, push-pull, and so on. The chip provides them
so you can get the rated power more easily with the circuitry they can
put on a chip. The opposite is "single-ended" or "unbalanced".
BUT: you need either a transformer or balun to get to single-ended,
which you need for most antennas. These are too bulky to fit on an IC,
so they "let" you use one externally. ("Require" is more like it, if
you want the rated power!)
Without a frequency range, I can't
help on what the most appropriate device would be.
Good Luck!
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RF_guy
Post subject:
Unread postPosted:
Fri Apr 01, 2005 12:02 am
Thanks a lot for your suggestion and
help.
My frequency range is between 3.1-10.6 GHz. Can you suggest
me what devices should i go for?
Also, the transceiver chip that
I'm going for may have a balun fitted in the chip (sometime later this
year). Does that mean that i can directly connect the antenna to the
chip?
Thanks
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mcp
Post subject:
Unread postPosted: Thu Apr 07, 2005 4:40 pm
Offline
Lieutenant
Joined: Thu Apr 07, 2005 4:03 pm
Posts: 2
Maybe this will
help:
http://www.odyseus.nildram.co.uk/RFMicr ... Design.pdf
Posted 11/12/2012
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