[time-nuts] GPS ceramic patch in what plastic housing?
Stanley Reynolds
stanley_reynolds at yahoo.com
Sun Sep 5 17:27:23 UTC 2010
The plastic may also function as a lens particularly the corners of the box
see:
http://authors.library.caltech.edu/10409/1/ZMUieeetmtt92.pdf
figure 2 shows a polyethylene lens.
Stanley
----- Original Message ----
From: Peter Krengel <krengeldatec at gmx.de>
To: time-nuts at febo.com
Sent: Sun, September 5, 2010 11:12:05 AM
Subject: [time-nuts] GPS ceramic patch in what plastic housing?
Hello,
I just did some experiments using a ceramic patch antenna inside a
small plastic (80 x 30 x 20mm) screw box and experienced much bader signals at
lower elevations.
The plastic is marked as PS (I guess polystyrole ?). Further experiments
covering a GPS with the same kind of box seemed to effect the signals
too. On the other hand covering the patch with a flat pcs of the same
material didnt effect the antenna.
Is there possibly a cavity effect?
What to take best?
Any ideas?
Thank you
Peter, DG4EK
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