u-blox ANTARIS 4 User Manual


L hardtocontrolimpedanceof mscable.Thiseffectisindeed
beneficialiftheantennacablebetweentheantennaand case,there’snoneed
f  10-15
dB. In this en e
imped amplification.
1.5.9 Antenna Placement
WheretheantennaismountediscrucialforoptimalperformanceoftheGPSreceiver.
Whenusingpatchantennas,theantennaplaneshouldbe paralleltothegeographichorizon.Theantennamust
havefullviewoftheskyensuringadirectline-of-sightwithasmanyvisiblesatellitesaspossible.
NAcanhelptomatchthe theantennatoa50Oh
thereceiverisonlyshort.Inthis
or the gain of the LNA to exceed
ancematchingandnotsignal
vironment the sole purpose of the LNA is to provid
1
st
Choice Placement 2
nd
Choice Placement
RecommendedAntennapositions
Perform raded!
Ifrecommendedplacementsarenotavailable,these
mayalsoviable.
ancemaybedeg


Note:WindowandroofreduceGPSsignaland
obstructskyview
1



Note:Theremaybemultipathsignalsanda
obstructedskyview



Note:FiberglassairfoilattenuatestheGPSsignal
Table 1: Optimal antenna placement

1
 Some carshave a metallic coating onthe windscreens. GPS receptionmay not be possible in sucha carwithout the use of SuperSense
®

Technology.Thereisusuallyasmallsection,typicallybehindtherearviewmirror,reservedformobilephoneandGPSantennas.
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) GPSFundamentals
GPS.G4-MS4-05007-A1
  Page 21

u-blox ANTARIS 4 Specifications

General

Brand	u-blox
Model	ANTARIS 4
Category	GPS
Language	English