Hi again, The very best GNSS antennas tend to be based on suspended patch antenna (air-dielectric) structures because they give the best bandwidth/radiation efficiency (and hence, noise temperature) performance. The very best include choke-rings for multipath suppression (Dorne-Margolin & variants), but these are costly items. Miniature ceramic pucks can have pretty horrible radiation efficiency, which degrades noise performance, so be careful when buying Chinese cheapies. I have actually seen commercial antennas where resistors were added (before LNA) to improve antenna return loss!
On 27.01.19 14:28, Bob kb8tq wrote: > Hi > > With things like the uBlox F9 now out on the market cheap …. I would go with > an antenna that will do L1 / L2 / L5 and work with everything that it up > there. > You still are in the “under $100” range (delivered) for new product from > China. > It’s a good bet that the guts of all of them are made there. It’s also a good > bet > that they all are ceramic slab style designs. > > Bob > >> On Jan 26, 2019, at 11:10 PM, Denny Page via time-nuts >> <time-nuts@lists.febo.com> wrote: >> >> Hi all, >> >> I’m looking for recommendations on an antenna / splitter configuration. I >> currently have six GPS/GLONASS/Galileo timing devices, each with it’s own >> puck antenna in a window. I have an opportunity to move to a (single) roof >> top antenna, with a splitter to feed the individual devices, and I am >> looking for recommendations on which antenna and splitter people would >> recommend. >> >> So far, I am looking at the following antennas: >> >> PCTEL GNSS1-TMG-26N >> (https://www.pctel.com/antenna-product/global-gnss-timing-reference-antenna-gnss1-tmg-26n/) >> >> PCTEL GNSS1-TMG-40N >> (https://www.pctel.com/antenna-product/global-gnss-timing-antenna-gnss1-tmg-40n/) >> >> And the following splitters: >> >> GPS Networking ALDCBS1x8 (https://www.gpsnetworking.com/products/aldcbs1x8) >> >> GPS Source S18 >> (https://www.gpssource.com/collections/gps-splitter/products/s18-1x8-standard-gps-splitter) >> >> The run from the antenna to the splitter will be 30-35 feet, and from the >> splitter to the units will be 3-5 feet. I’m wondering about the need for the >> 40dB vs the 26dB. I haven’t looked at any passive splitters, but even with >> the 40dB I’m thinking won’t offer enough to support even a 1x6 splitter. >> >> I would appreciate any thoughts folk have to offer. >> >> Thanks, >> Denny >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@lists.febo.com >> To unsubscribe, go to >> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
