“No Interference” Embedded GPS Antenna with Dual SAW High Rejection Filter

Wi-Sys: WS3951-HR - Embedded GPS Antenna without ground planeWi-Sys: WS3961-HR - Embedded GPS Antenna with internal ground plane
pdf data sheetpdf data sheet
Features
  • WS3951-HR: without internal ground-plane
  • WS3961-HR: with internal ground-plane
  • Very high rejection dual SAW filter
  • Patented high performance dual LNA
  • High gain: 25.5 dB @ 5 V (typ.)
  • Low current: 7.5 mA @ 3.3 V (typ.)
  • 3.1 dB low noise figure
  • 15KV ESD circuit protection
  • 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-HR/WS3961-HR “No Interference” Embedded GPS Antenna with Dual SAW High Rejection Filter

The WS3951-HR / WS3961-HR “No Interference” Embedded GPS Antennas with Dual SAW High Rejection Filter have the industrys best out-of-band filter performance. These antennas feature a custom designed ceramic patch element that minimizes detuning effects caused by adjacent objects, ESD circuit protection, a patented two-stage low noise amplifier and a dual SAW high rejection filter. The WS3951- HR / WS3961-HR antennas provide the most consistent, clear GPS signal reception while minimizing loss-of-lock in high-RF fields. 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
11.5 mA @ 5 VDC
ESD circuit protection15K Volts
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)
gain25 db @ 3.3 VDC (typical)
25.5 db @ 5 VDC (typical)
noise figure3.1 dB