Very Low Current Embedded GPS Antennas

Wi-Sys: WS3955 - Embedded GPS Antenna without ground planeWi-Sys: WS3965 - Embedded GPS Antenna with internal ground plane
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Features
  • WS3955: without internal ground-plane
  • WS3965: with internal ground-plane
  • Extremely low current: 1.3 mA @ 2.7 VDC
  • Low noise figure: 1 dB
  • Excellent out-of-band signal rejection
  • RoHS compliant

Applications
  • Battery Powered Telematics
  • Portable GPS
  • Ruggedised UMPCs and PDAs
  • Asset Tracking Equipment
  • Military and Law Enforcement Radios

WS3955/WS3965 Very Low Current Embedded GPS Antennas

The WS3955 / WS3965 embedded GPS antenna series has the industrys lowest current figure. The WS3955 / WS3965 series is ideal for personal GPS applications including Handsets, Ultra Mobile PCs, and PDAs. This series features a perfectly tuned custom ceramic patch element that minimizes detuning effects caused by adjacent objects. As well it features ESD circuit protection, the industry leading 1.3 mA 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 WS3955 comes in a compact square package and the WS3965 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 WS395528.4 mm x 28.3 mm x 7.7 mm
WS396545.2 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 voltage2.5 - 5.0 VDC
current1.3 mA @ 3.3 VDC
2 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)
gain20 db @ 5 VDC (typical)
noise figure1 dB