Hi Peter, While you did not say, I am going to guess you are considering making a weather proof (or nearly so) housing for your ceramic patch antenna. I have used the little patch antennas with the magnetic base from Motorola for the top of my car. They seem to last quite long as the one I have has been out in the elements (San Diego, CA) for around 9 or ten years. Yes, its plastic housing is showing some discoloration from the UV rays, but no operational issues.
However, for a housing, may I suggest a small PYREX glass mixing bowl. It is a little heavy but very sturdy and some have an edge that could be used to hold it in place by fitting a collar around it made out of wood that would get clamped to the base which could be made out of wood. The wood would have to be varnished with a good Urethane. Anyway, my two cents; Bill....WB6BNQ Magnus Danielson wrote: > On 09/05/2010 10:06 PM, Peter Krengel wrote: > > Thanks Robert, Stanley and Bob for the tips. > > > > I tested some materials in a microwave oven and they all seemed to > > be good because there was no heating (maybe handwarm at 800W). > > > > So the magic word seems to be refracting effects even at 1.5GHz... > > > > As I cannot get a commercial helf sphere for putting over the patch > > has anyone an idea what to take for i.e. from kitchen? > > One should recall that some plastics absorb more water than others... so > unless one has a good info on their absorbtion, putting them into water > overnight and the pour it out and wipe it clean just prior to microwave > it would form a better simulation... > > Cheers, > Magnus > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
