Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
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Differential output of RF transceiver - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
platforms dominating public commenting venues. RF Cafe Forums began sometime around
August of 2003 and was quite well-attended for many years. By 2010, Facebook and
Twitter were overwhelmingly dominating online personal interaction, and RF Cafe
Forums activity dropped off precipitously. If the folks at
phpBB would release a version with integrated
sign-in from the major social media platforms, I would resurrect the RF Cafe Forums,
but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: Differential output of RF transceiver
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
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.
Post subject: Balanced Output
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.
Fri Apr 01, 2005 12:02 am
Thanks a lot for your suggestion and
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
Unread postPosted: Thu Apr 07, 2005 4:40 pm
Joined: Thu Apr 07, 2005 4:03 pm
Maybe this will
http://www.odyseus.nildram.co.uk/RFMicr ... Design.pdf