Sneaking RF into a case... - RF Cafe Forums
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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.
My concern is getting the RF from chassis wall to the box containing the Tee without interfering with
unshielded equipment in the chassis.
Post subject: Re: Sneaking RF into a case...Posted: Tue Apr 28, 2009 8:17 am
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
Sucking in and blowing out.