tw3740 北斗/gps /glonass 多频授时天线
tw3740和tw3742是全球导航卫星系统的宽带天线，所有l波段高端的gps提供精确的接收，
glonass，北斗，和伽利略信号（l1，g1，b1，b1-boc，b1-2，e1）和相关联的增强信号（waas，
egnos和msas）。
两个天线模型提供了大大增强的多路径信号的抑制
通过tallysman先进accutenna™技术，提供低轴向
比和改进的相位中心精度，从而提供卓越的精度。
高增益这些天线使其成为理想的定时应用的
电信，数据通信和电力分配
行业。该tw3742包括预滤池提供高输出的带外
排斥潜在从共同位于发射干扰信号。防护等级为ip67
标准的外壳和金属底座，确保在无形中可靠的性能
tw3740/tw3742 gps/glonass/beidou/galileo antenna
the tw3740 and tw3742 are precision high gain gnss antennas covering the beidou b1, galileo e1, gps l1, glonass l1 and sbas (waas, egnos, qzss & msas) frequency band (1557 to 1606 mhz). itemploys tallysman’s unique accutenna™ technology providing truly circular polarized signal reception through the entire bandwidth of the antenna, thereby providing superior multipath signalrejection. it is especially designed for precision timing, industrial, agricultural, military, and other precision applications.
the tw3740 features a three stage low noise amplifier, comprised of one input lna per feed, a mid section saw to filter the combined output, and a final output gain stage. an optional tightpre-filter is available on the tw3742 to protect against saturation by high level sub-harmonic and l-band signals.
the tw3740/tw3742 is housed in a permanent mount metal base with two nickel coated nuts and a weather-proof enclosure. two options for mounting are available: an l-bracket (p/n#23-0040-0) or a pipemount (p/n#23-0065-0).
applicationsfeaturesbenefits
high accuracy & mission critical global positioningtiming applicationsprecision agriculture, mining & constructionmilitary & securityavionicslaw enforcement & public safetyfleet management & asset tracking great axial ratio: 1 typ., 3 db maxlow noise lna: ≤1 dbhigh rejection saw filterlna gain: 40 db typ.low current: 15 ma typ.wide voltage input range: 2.5 to 16 vdcip67 weather proof housing excellent multipath signal rejectionincreased system accuracyexcellent signal to noise ratiogreat out of band signal rejectionideal for harsh environmentsrohs compliant
specificationsantenna
architecture dual, quadrature feeds
1 db bandwidth 49 mhz
antenna gain (100mm ground plane) 4.75 dbic
axial ratio (over full bandwidth)
electrical
architecture one lna per feed line, mid section saw filter
filtered lna frequency bandwidth 1557 to 1606 mhz
polarization rhcp
lna gain tw3740: 40 db min., 1559 to 1606 mhz tw3742: 40 db typ., 1559 to 1606 mhz
gain flatness +/- 2 db, 1559 to 1606 mhz
out-of-band rejection
>1640 mhz
tw3740 tw3742
>32 db >50 db
>25 db >50 db
>35 db >75 db
vswr (at lna output)
noise figure ≤1 db typ (tw3740) 3.5db typ (tw3742)
supply voltage range (over coaxial cable) +2.5 to 16 vdc nominal (12vdc recommended maximum
supply current 15 ma typ.
esd circuit protection 15 kv air discharge
mechanicals& environmental
mechanical size 57 mm dia. x 15 mm h
cable rg174
operating temp. range -40 to +85 °c
enclosure radome: asa plastic, base: zamak white metal
weight 150 g
attachment method magnet or permanent (pre-tapped 4 x 6-32unc)
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