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WS 3978 and WS 3978-DR
High-Gain Permanent Mount GPS Antenna


Wi-Sys: Through-hole Mount GPS Antenna 

pdf data sheetWS3978 Datasheet.pdf


            WS 3978                                        WS3978-DH  
 Features    
  • Rugged, compact all-plastic non corrosive housing
  • ¾ inch through-hole mount
  • Voltage range 2.7 - 5.5 V
  • LNA 40 dB gain typical
  • Low noise figure 0.5dB
  • Very high out-of-band signal rejection
  
  • Value priced
  • 15KV ESD circuit protection
  • Cone option WS3978-DH for fixed installations
  • Loss of lock minimised
  • Very clear consistent GPS signal
  • 3 Stage LNA circuit SAW filter

WS3978 High-Gain Permanent Mount GPS Antenna

The WS3978 [and the WS3978-DH] high gain permanent mount GPS Antenna provides 40 dBs of gain and great high out-ofband rejection performance. It features a perfectly tuned custom ceramic patch element for maximum signal reception, ESD circuit protection, a very low noise (0.5 dB) 3 stage LNA circuit and a SAW filter, enabling the WS3978 to provide a reliable and clear GPS signal while minimizing loss-of-lock, even when conditions are less than ideal. Available in an all-plastic, non-corrosive low profile package for vehicle mount or with a cone-shaped radome cover for fixed installations, the WS3978 high gain permanent mount GPS Antenna is the optimum choice for GPS Tracking and Timing applications with long cable runs.


Designed for maximum GPS performance, the WS397 antenna's advanced circuitry integrates a SAW filter and extremely low-noise amplifier to ensure a most reliable, consistent and clear signal for the GPS receiver even in most difficult conditions. Where other GPS antennas fail, the WS3978's great out-of-band rejection and extremely low noise characteristics can provide a very reliable signal - critical for improving acquisition times and minimizing outages.
Applications 
  • Fixed Timing & Positioning Applications
  • WiMAX / Fixed Wireless Broadband
  • Cellular Base Station
  • Fleet Management & Telematics 
  • Marine Vessel Installations
     

Technical Specifications

Environmental Specifications temperature Operating: -40c to +85c (-45c to +85c storage)
weatherproof IP67
Mechanical dimensions 60 mm Dia. x 20 mm H
65 mmDia x 44.4mm H for the -DH model
weight 50g
mounting Single hole, ¾ - 16 threaded mount
connector TNC jack
shock Vertical axis 50G
Other axes 30G
vibration 3 axis, sweep = 15 min
10 - 200 Hz log sweep: 3G
Antenna Response frequency 1575.42 MHz
gain @ 90° 3.0 dBic
@ 20° -2.0 dBic
polarization Right Hand Circular
axial ratio @ 90° 4 dB
@ 20° 6 dB
Electrical voltage 2.7 - 5.5 VDC
current 15 mA
LNA Specifications frequency 1572.5 - 1578 MHz
output impedance 50 Ohm
VSWR 1.5:1 max (at connector)
gain 40 dB (typical)
out-of-band rejection +/- 20 MHz: -10 dB
 
   
 
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