Very Low Noise Embedded GPS Antennas

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The Wi-Sys Antenna Family

WS3910
The high gain active GPS antenna with SAW filter

WS3914
Our lowest current model, 2 mA active GPS antenna

WS3916
Low cost GPS antenna

WS3917
Low cost GPS antenna

WS3940
Glass Mount combined Active GPS and Cellular

WS3940-ULD
Embedded, Glass Mount combined Active GPS and Cellular

WS3942
Mag Mount combined Active GPS and Cellular

WS3950
WS3960
The high gain embedded patch antenna with optional ground plane

WS3954
WS3964
The low power embedded patch antenna with optional ground plane

WS3957
WS3967
The low price embedded patch antenna with optional ground plane

WS3977
Through-hole Mount GPS Antenna

Very Low Noise Embedded GPS Antennas

Wi-Sys: WS3951 - Embedded GPS Antenna without ground plane

Wi-Sys: WS3961 - Embedded GPS Antenna with internal ground plane

pdf data sheet

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 industry’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)
Environmental Specifications	humidity	95% max (non condensing)
Mechanical	WS3951	28.4 mm x 28.3 mm x 7.7 mm
	WS3961	45.2 mm diameter x 7.7 mm
	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 dBic @ 20° -2.0 dBic
	polarization	Right Hand Circular
	axial ratio	@ 90° 4 dB @ 20° 6 dB
Electrical	voltage	2.7 - 5.0 VDC
	current	7.5 mA @ 3.3 VDC (typical)
	connector	MCX right angle Other connector types available
	cable	RG174
	cable length	15 cm (6”), other lengths available
LNA Specifications	frequency	1572.5 - 1578 MHz
	output impedance	50 Ohm
	VSWR	1.5:1 max (at connector)
	gain	@ 3.3VDC: 28 dB (typical) @ 5.0VDC: 30 dB (typical)
	noise figure	0.5 dB

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