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<div dir="ltr" data-setdir="false">I agree. Not sure what one can readily test over that temperature range in a very small chamber. As Drew stated maybe mechanical viability over temperature is enough but I think it would be nice to know something doesn't disconnect electrically or act up at the extremes (or on the way there). </div><div dir="ltr" data-setdir="false">Perhaps measuring the return loss and some kind of very near field signal strength monitoring could be done over what ever temp range one can arrange. Dry Ice can get you to about -79C. Don't know how to go colder other than with say liquid Nitrogen at -196C. Going hot is easy.</div><div><br></div>
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On Thursday, July 2, 2020, 11:15:19 AM PDT, Drew Arnett <arnett.drew@gmail.com> wrote:
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<div><div dir="ltr">Can you say OK by design per mechanical stability over temperature due<br clear="none">to known material properties? Maybe cycle a few times without doing<br clear="none">electrical measurement at the same time to see if anything works<br clear="none">loose? (accelerated lifetime test)<br clear="none"><br clear="none">Running an entire anechoic over temperature is challenging. Not the<br clear="none">first time I've heard the question.<br clear="none"><br clear="none">Indoor or OAT range and something like a thermostream?<br clear="none"><br clear="none">Drew<br clear="none">n7da<br clear="none"><br clear="none">On Thu, Jul 2, 2020 at 5:06 PM Michelle Thompson<br clear="none"><<a shape="rect" href="mailto:mountain.michelle@gmail.com" rel="nofollow" target="_blank">mountain.michelle@gmail.com</a>> wrote:<br clear="none">><br clear="none">> Anyone have access to any type of temperature chamber, anywhere to test some antennas?<br clear="none">><br clear="none">> For Gateway, temp range is expected to be -200 to +160 C.<br clear="none">><br clear="none">> I'd like to get any results, even if it's "only" industrial range, for the antennas that we currently have in hand for 5 GHz/10 GHz.<br clear="none">><br clear="none">> This would start to produce results that could be compared to later results, when the revisions of the designs for Gateway start getting turned into molecules. Showing improvement over temperature is super important and starting now greatly reduces risk.<br clear="none">><br clear="none">> -Michelle W5NYV<br clear="none">><br clear="none">><br clear="none">> --<br clear="none">> You received this message because you are subscribed to the Google Groups "SDMG" group.<br clear="none">> To unsubscribe from this group and stop receiving emails from it, send an email to sdmicrowave+<a shape="rect" href="mailto:unsubscribe@googlegroups.com." rel="nofollow" target="_blank">unsubscribe@googlegroups.com.</a><br clear="none">> To view this discussion on the web visit https://groups.google.com/d/msgid/sdmicrowave/CACvjz2Xnw%2BECNc3w-5OktD97HpwTWm6earw1rkEdVVTxe-rQ0g%40mail.gmail.com.<div class="ydp1d72eacyqt2042654107" id="ydp1d72eacyqtfd80080"><br clear="none"><br clear="none">-- <br clear="none">You received this message because you are subscribed to the Google Groups "SDMG" group.<br clear="none">To unsubscribe from this group and stop receiving emails from it, send an email to sdmicrowave+<a shape="rect" href="mailto:unsubscribe@googlegroups.com." rel="nofollow" target="_blank">unsubscribe@googlegroups.com.</a></div><br clear="none">To view this discussion on the web visit https://groups.google.com/d/msgid/sdmicrowave/CAEPVBQ09ZcJhSL4p28%3DpGhDZN%2B1cKyRa%3DMi4czFa3127iwhXJQ%40mail.gmail.com.<div class="ydp1d72eacyqt2042654107" id="ydp1d72eacyqtfd70006"><br clear="none"></div></div></div>
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