Copyright: 1996 - 2024
BSEE - KB3UON
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Sneaking RF into a case... - 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
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Forums activity dropped off precipitously. If the folks at
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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: Sneaking RF into a case... Posted:
Mon Apr 27, 2009 10:44 pm
Joined: Mon Apr 20,
2009 2:04 pm
I was just wondering
if anyone had a suggestion for sneaking RF through a chassis wall and
into a load without leaking it all over the interior of the chassis.
Essentially, I want to transport DC plus up to 37dBm of 30MHz -
10GHz, through a connector, into a chassis and then into a box that
functions as a dummy load / bias Tee to pull the DC out.
is getting the RF from chassis wall to the box containing the Tee without
interfering with unshielded equipment in the chassis.
Re: Sneaking RF into a case...Posted: Tue Apr 28, 2009 8:17 am
Joined: Wed Apr 08, 2009 7:53 am
Is the chassis IP rated?
If it is an IP65 chassis, then just
make a drilling on the bottom face of the chassis (big enough so the
cable connector can pass though) and connect the cable into the insider
load box.. perhaps you could put a plastic device on the chassis wall
hole(I don´t know how you call it) so you don´t damage the cable.
And be careful, perhaps it is not a good idea to have unshielded
RF inside of the chassis.
Perhaps this is not ideal for every
application, this is common for IP65 outdoor high power cellular repeaters..
Hope this helps you.
Post subject: Re: Sneaking RF into a case...Posted:
Wed Apr 29, 2009 7:02 am
Joined: Fri Feb
17, 2006 12:07 pm
Location: London UK
because I don't have your precise mechanical config, I would mount a
good quality SMA bulkhead female to female connector on the outside
box, and something similar on the inside box, then attach an SMA male
to SMA male semi-rigid coax line between the two. That gets the DC plus
30-10000 MHz to the inside of the inner box with a screening factor
of about 100dB.
Or am I missing something that makes that impossible?
At bottom, life is all about
and blowing out.