Advanced Navigation Spatial FOG Dual Reference Manual page 36

The standard antenna supplied in the Spatial FOG Dual evaluation kit is the Antcom
G5Ant-53A4T1. It is an L1/L2/L5 RTK antenna that supports GPS, GLONASS, BeiDou,
Galileo, Omnistar and SBAS. It is environmentally sealed to the IP68 standard.
If you are supplying your own antenna it is important to ensure that the antenna is
able to receive all constellations and not just GPS, otherwise you will not achieve full
performance. It is also important to select an IP67 antenna with an IP67 SMA
connector, otherwise the system will not be environmentally sealed.
It is recommended to use an antenna with the following characteristics:
The antenna should be capable of receiving GPS, GLONASS, BeiDou and Galileo.
•
The antenna needs to have an accurate phase centre. This is required for the
•
dual antenna heading to function correctly. Low performance (low cost)
antennas are typically not able to achieve good heading performance.
If the unit is being used for RTK, the antenna needs to be capable of receiving
•
both L1 and L2. It should also have an accurate phase centre.
The antenna should have a minimum LNA gain of 29dB and a maximum gain of
•
50dB.
The antenna should be environmentally sealed, including connectors.
•
If you are sourcing your own antenna cables it is important to ensure that the antenna
has enough gain to support the loss over the cable. Spatial FOG Dual requires a
minimum of 25dB of gain at the connector. With the standard 4 metre RG-58/U
antenna cables supplied by Advanced Navigation, the minimum antenna gain is 27dB.
Spatial FOG Dual Reference Manual
Illustration 19: Spatial
FOG Dual example
antenna placement
Page 35 of 138
Version 1.0
26/06/2015