Very Low Noise Embedded GPS Antennas

Wi-Sys: WS3951 - Embedded GPS Antenna without ground planeWi-Sys: WS3961 - Embedded GPS Antenna with internal ground plane
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Features
  • WS3951: without internal ground plane
  • WS3961: with internal ground plane
  • 28 dB gain @ 3.3 VDC
  • Extremely low noise figure: 0.5 dB
  • Excellent out-of-band signal rejection
  • RoHS compliant

Applications
  • Portable Telematics
  • Automotive Navigation Systems
  • Fleet Management & Telematics Systems
  • Precision Ag Equipment
  • Asset Tracking Equipment
  • Military Radios and In-Vehicle Systems
  • Law Enforcement Systems

WS3951/WS3961 Very Low Noise Embedded GPS Antennas

The WS3951 / WS3961 Embedded GPS Antenna series has the industryâ€s lowest noise figure. It features a perfectly tuned custom ceramic patch element that minimizes detuning effects caused by adjacent objects. As well it features ESD circuit protection, a patented LNA (low noise amplifier) and a high rejection SAW filter which enable these antennas to provide a consistent, clear signal while minimizing loss-of-lock even when GPS conditions are less than ideal. The WS3951 comes in a compact square package and the WS3961 comes with a 45.2 mm diameter mini ground-plane.

Technical Specifications

Environmental Specifications temperature-40c to +80c operating
(-45c to +80c storage)
humidity95% max (non condensing)
Mechanical WS395128.4 mm x 28.3 mm x 7.7 mm
WS396145.2 mm diameter x 7.7 mm
shockVertical axis 50G
Other axes 30G
vibration3 axis, sweep = 15 min
10 - 200 Hz log sweep: 3G
Antenna Response frequency1575.42 MHz
gain@ 90° 3 dBic
@ 20° -2.0 dBic
polarizationRight Hand Circular
axial ratio@ 90° 4 dB
@ 20° 6 dB
Electrical voltage2.7 - 5.0 VDC
current7.5 mA @ 3.3 VDC (typical)
connectorMCX right angle
Other connector types available
cableRG174
cable length15 cm (6"), other lengths available
LNA Specifications frequency1572.5 - 1578 MHz
output impedance50 Ohm
VSWR1.5:1 max (at connector)
gain@ 3.3VDC: 28 dB (typical)
@ 5.0VDC: 30 dB (typical)
noise figure0.5 dB