tw4721gps /glonass/ 北斗/伽利略 卫星导航天线
tw4721 wideband dual feed gps/beidou/galileo/glonass antenna
the tw4721 is a compact, wideband accutenna™ technology gnssantenna from tallysman that provides accurate reception for allupper l- band gps, glonass, beidou, and galileo signals ( l1, g1,b1, b1 boc, b1-2, e1) and associated augmentation signals (waas,egnos and msas).
the tw4721 features a novel 25mm dual feed wideband patch elementthat, in sharp contrast with its competitors, provides a trulycircularly polarized response, with a typical axial ratio of lessthan 2db over the full bandwidth. this provides a more linearcarrier phase response and substantially improved multipathrejection for higher precision applications.
the tw4721 is the smallest, lightest, gnss antenna for reception ofall gnss constellations. it is housing in a compact ip67 magneticmount enclosure and is available with a wide range of connectoroptions and custom coax cable lengths.
applicationsfeaturesbenefits
cost sensitive mission critical positioningmilitary & securitycovert surveillancefleet management & asset tracking dual feed patch element40% wider bandwidth, small footprintaxial ratio: 3 db max. (gps & beidou & galileo)low noise lna: 2 dbhigh rejection mid-section saw filterhigh gain: 26 db typ.wide voltage input range: 1.8 to 16 vdc 2db bandwidth includes gps-l1 & beidou b1 & galileo e1& glonass g1greatly enhanced multipath rejectionimproved gnss reliabilityexcellent signal to noise ratiorohs compliantideal for harsh environmentsexcellent out of band signal rejection
specificationsvcc = 3v, over full bandwidth,t=25°c
antenna
architecture wideband dual feed patch element
2 db radiated power bandwidth (rhcp) 47 mhz
antenna gain (with 100mm ground plane) 4.5 dbic @ 1582.5 mhz
axial ratio over bandwidth (over full bandwidth) <2db typ.
polarization rhcp
electrical
architecture dual feed patch → hybrid → lna stage 1 → saw filter → lna stage2
filtered lna frequency bandwidth 1559 to 1606 mhz
gain 26db min, 1559 mhz to 1606 mhz
gain flatness +/- 2db, 1559 mhz to 1606 mhz
gps out-of-band rejection
<1500
<1525
>1630  
>40db
> 45db
>45db
vswr (at lna output) <1.5:1
noise figure 1.0db typ.
supply voltage range (over coaxial cable) +1.8 to 16 vdc nominal (12vdc recommended maximum)
supply current 10ma typ. 15ma max. (@ 85°c)
esd circuit protection 15 kv air discharge
mechanicals & environmental
mechanical size 38mm x 38mm dia. x 14.3mm h
connectors sma male standard, others available
cables rg174
operating temperature. range -40 to +85°c
enclosure radome and base: asa plastic
weight 50gm (enclosure + sma connector 34gm, cable 0.31gm/cm)
attachment method magnetic
environmental ip67, reach, and rohs compliant
shock vertical axis: 50 g, other axes: 30 g
vibration 3 axis, sweep = 15 min, 10 to 200 hz sweep: 3 g
warranty one year, parts and labour

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北京北斗联星科技有限公司
薛云杰
18612719456
北京市西城区马连道11号一商大厦818