[time-nuts] ground plane for cheap helix antennas?
Alan Ambrose
alan.ambrose at anagram.net
Thu Jul 23 13:38:00 EDT 2015
Hi, is there any benefit in adding a ground plane to these simple timing antennas? e.g. GPS-TMG-26N
http://www.antenna.com/apg_products.cgi?id_num=11740
In which case, how big? And I'm imagining immediately underneath the antenna? This ublox note suggests probably not?
http://www.u-blox.com/images/downloads/Product_Docs/GPS_Antennas_ApplicationNote%28GPS-X-08014%29.pdf
The 58503A sitting on this atm gets '4.3us/initial 24 hours' prediction although I have seen it around 2.2us. Also max ~110 'SS'.
Also is it helpful to increase the elevation mask?
TIA, Alan
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