TW4327/TW4329 Low Current GPS/GLONASS Antenna

Product Description

~The TW***7/TW***9 is a very low power, compact wideband GNSS antenna covering the GPS L1, GLONASS L1 and SBAS (WAAS, EGNOS & MSAS) frequency bands (***5 to ***6 MHz.
This antenna features a bigger patch element with *0% wider bandwidth and a smaller foot print than most of its competitors. The LNA has a typical current consumption of just 1.*5mA, with constant characteristics over supply voltages from 2.5V to *6V. The LNA is a two stage amplifier with a mid-section high rejection SAW filter, with an optional anti-jamming pre-filter(TW***9).
The TW***7/TW***9 are amongst the lowest power devices available, yet still provide excellent noise figure with *1dB nominal gain (TW***7).
The TW***9 variant provides a “Brick-Wall” pre-filter to protect against saturation by high level sub-harmonics and near L-Band signals.
The TW***7/TW***9 are housed in a very small footprint IP*7 compliant magnetic mount enclosure.
Applications Features Benefits
• Battery Operated Mission Critical Positioning
• Military & Security
• Covert Surveillance
• Fleet Management & Asset Tracking • *0% wider bandwidth, small footprint
• Axial Ratio: 6dB typ.(GPS & GLONASS)
• Low noise LNA: 1dB
• Available sharp pre-filter (TW***9)
• Low current: 1.*5 mA typ. • 1 dB Bandwidth include GPS and GLONASS
• Excellent multipath rejection
• Excellent signal to noise ratio
• Excellent out-of-band rejection (TW***9)
• Ideal for harsh environments
• RoHS compliant
Specifications
Vcc = 3V, over full bandwidth, T=*5°C
Antenna 
Architecture Wideband Single Feed Patch
1 dB Bandwidth *1 MHz
Antenna Element Gain (**0mm ground plane) 4.5 dBic
Axial Ratio (over full bandwidth) 6 dB typ., 8 dB max.
Electrical 
Architecture TW***7: LNA stage 1 -> SAW filter-> LNA stage 2
 TW***9: SAW Pre-filter ->LNA stage 1 -> SAW filter-> LNA stage 2
Filtered LNA Frequency Bandwidth ***4 to ***6 MHz
Polarization RHCP
LNA Gain *8 dB min., ***5.*2 to ***6 MHz
Gain flatness +/- 2 dB, ***5 to ***6 MHz
Out-of-Band Rejection
<***0 MHz
<***0 MHz
>***0 MHz
 TW***7 TW***9
>*0 dB >*0 dB
>*5 dB >*0 dB
>*5 dB >*5 dB

VSWR (at LNA output) <1.5:1
Noise Figure 1.5 dB typ. TW***7
3.9dB typ. TW***9
Supply Voltage Range (over coaxial cable) 2.5 to *6 VDC nominal (*2VDC recommended maximum)
Supply Current 1.*5 mA typ. *2.0mA *@********************t Protection *5 KV air discharge
Mechanicals & Environmental 
Mechanical Size *8 mm x *8 mm x *4.3 mm H
Operating Temp. Range **0 to **5 °C
Enclosure Radome: ASA Plastic, Base: Zamak White Metal
Weight *0 g
Attachment Method Magnetic Mount
Environmental IP*7 and RoHS compliant
Shock Vertical axis: *0 G, other axes: *0 G
Vibration 3 axis, sweep = *5 min, *0 to **0 Hz sweep: 3 G
Warranty One year, parts and labour
Ordering Information 
*******-xx-yyyy TW***7 – Low Current GPS/GLONASS Antenna  
*******-xx-yyyy TW***9 – Low Current GPS/GLONASS Antenna with pre-filter 
Where xx = connector type, yy = radome type and colour, and zzzz = cable length in mm (where applicable)