tw3470/tw3472 dual feed gps/glonass timing antennathe tw3470/tw3472 are professional grade 40db fixed mount timingantennas covering the gps l1, glonass g1 and sbas (waas, egnos& msas) frequency bands (1574 to 1606 mhz). they areespeciallydesigned for timing, precision and military applications and offerexcellent circular polarized signal reception, multipath rejectionand out of band signal rejection.
the tw3470/tw3472 feature a highly circular dual-feed widebandpatch element, with a three stage low noise amplifier. thisconfiguration provides excellent axial ratio that is constantacross thefull frequency band. an optional tight pre-filter isavailable to protect against saturation by high level sub-harmonicsand l- band signals with part number tw3472.
the tw3470/tw3472 has a 19mm (3/4 inch) though hole, permanentmount white-metal base, with an industrial-grade, ip67 compliantconical radome. two options for pole mounting are availableanl-bracket (p/n#23-0040-0) or a pipe mount (p/n#23-0065-0).
applicationsfeaturesbenefits
gps / glonass fixed timinghigh accuracy & mission critical global positioningmilitary & securityavionicslaw enforcement & public safetyfleet management & asset tracking great axial ratio: 1 typ.high gain lna: 40 db min.low noise lna: 1db/3.5db tw3470/tw3472available sharp pre-filter (tw3472)low current: 20 ma typ.wide supply voltage: 2.5 to 16 vdcip67 weather proof housingavailable flat-top radome (mobile apps) excellent circular polarisationexcellent multipath rejectionexcellent signal to noise ratioexcellent out-of-band rejection (tw3472)increased system accuracyideal for harsh environmentsrohs compliant
specificationsvcc = 3v, over full bandwidth,t=25°c
antenna
architecture dual, quadrature feeds
1 db bandwidth 32 mhz
antenna element gain (100mm ground plane) 4.25 dbic
axial ratio (over full bandwidth) 1 db typ., 3 db max.
electrical
architecture tw3470: one lna per feed line -> saw filter -> 2-stagelna
tw3472: (saw->lna) per feed -> combiner -> saw ->2-stage lna
filtered lna frequency bandwidth 1574 to 1606 mhz
polarization rhcp
lna gain 40 db min., 1575.42 to 1606 mhz
gain flatness +/- 2 db, 1575 to 1605 mhz
out-of-band rejection
<1500 mhz
<1550 mhz
>1640 mhz
tw3470 tw3472
>32 db >50 db
>25 db >50 db
>35 db >70 db
vswr (at lna output) <1.5:1
noise figure 1 db typ. tw3470
3.5db typ. tw3472
supply voltage range (over coaxial cable) 2.5 to 16 vdc nominal (12vdc recommended maximum)
supply current 20 ma typ. 25ma max @85c
esd circuit protection 15 kv air discharge
mechanicals & environmental
mechanical size 66.5 mm dia. x 47.5 mm h
operating temp. range -40 to +85 °c
enclosure radome: exl 9330, base: zamak white metal
weight 140 g
attachment method permanent 3/4” (19mm) through-hole mount
environmental ip67 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