Yup you brought up a point that was mentioned to me about a week ago by
an active uW'er. I can pretty easily test the effects of the plastic for
it's IL and any changes in RL but changing the pattern is beyond my
basement setup due to reflections etc. The sad part is I have hundreds
of feet of 1" Kapton tape that we use to use on satellites etc, too bad
I could not grab any really wide tape before the doors closed. I do have
a sample (non-adhesive backed) on the way I plan to test, and I am
pretty sure it is going to be fairly RF transparent at 10 GHz.
Gedas, W8BYA EN70JT
Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
On 7/9/2020 5:10 PM, jimlux wrote:
On 7/9/20 1:06 PM, Richard (Rick) Karlquist wrote:
Build a frame for it and hold it to the frame with
a clamping scheme, using a gasket to make it
water proof. You can then glue the frame to
the horn.
73
Rick N6RK
On 7/9/2020 11:13 AM, Gedas wrote:
Pardon the OT post but we have so many knowledgeable folks here I
was hoping I could get a quick answer.
This is antenna & RF related so maybe not super far off OT hi-hi.
I have a 1/16" thick 3"x3" sheet of Teflon that I need to "glue" to
the front of a uW horn antenna to keep water, dirt, bugs, etc out of
it. Can anyone tell me what type of adhesive is known to adhere to
Teflon and is not too difficult to acquire? TU
what people do in the microwave business is basically what Rick
suggest.. Or you can use PTFE (or nylon) screws, and tap holes in your
sheet of PTFE.
You do know that you're going to change the pattern/gain of your horn
by putting a substantial fraction of a wavelength of dielectric in
front of it.
If you just want to keep bugs out, there's a variety of adhesive tapes
that would work, and last quite a while (i.e. they're UV resistant).
It's wretchedly expensive, but Kapton tape would work, and in the 1/2
mil thickness won't change the horn pattern very much. Then you're
just limited by the acrylic adhesive (and you can always make a clamp)
Gedas, W8BYA EN70JT
Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
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