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
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
High Performance RF Front End, Selectivity + Overload - RF Cafe
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: ### High Performance RF Front End, Selectivity
+ Overload Posted: Mon Nov 06, 2006 12:20 pm
Joined: Mon Nov 06, 2006 12:15 pm
We are working on a design for a high performance
RF Front End for a digital FM Reciever. The end system will perform
many various RF processing techniques using a Xilinx FPGA device.
That being said, we have some specific criteria to meet on the RF
Such as - sensitivity down to 1-5uV range at the frequency
Overload rejection of upto 12V for a blocking signal
There was as McIntosh reciever (MR-78) that
was designed to handle such overload without the desensing effect.
Does anyone have references, schematics, etc for any various RF
Front ends that could offer such overload rejection and/or references
on how to develop such overload protection without the desensing effect?
The overload - without desensing - is the primary issue we are facing