33-4027-00-3000

TW4027/TW4029 Low Current GPS Antenna The TW4027/TW4029 is a very low power, compact GNSS antenna covering the GPS L1, frequency band. This antenna features an LNA with a nominal current consumption of just 2mA, with constant performance from 2.5V to 15V supply voltage, and includes protection against close proximity L-band transmitting antennas such as Iridium™ and Globalstar™ The TW4027/TW4029 has among the lowest power consumption available, yet still provides 21dB nominal gain and an excellent Noise Figure. The TW4027.TW4029 patch has 40% wider bandwidth for better axial ratio and has 15 KV ESD circuit protection. The LNA has a +/- 10MHz bandwidth that covers the full GPS L1 signal plus the SBAS (WAAS /EGNOS/MSAS) frequency band (1572.5 to 1578 MHz). The TW4029 variant provides a “Brick-Wall” pre-filter to protect against saturation by high level sub-harmonics and L-Band signals. It is housed in a compact IP67 magnetic mount enclosure. Applications • • • • Battery operated monitoring Covert Surveillance Fleet Management & Asset Tracking Satcom based AVL solutions Features Benefits • • • • • • • • • • • • Nominal 2mA current draw Invariant response, 2.5 to 16 VDC Supply Low Noise 1.0dB/3.5dB Typ. (TW4027/TW4029) Axial ratio: 4 dB max (GPS ) TW4122 “Brick-Wall pre-filter option High gain: 24dB/18dB Typ. (TW4027/TW4029) IP67 weather proof housing Longer battery life Excellent signal to noise ratio RoHS compliant Ideal for harsh environments Excellent out of band signal rejection TW4027/TW4029 Low Power GPS Antenna Specifications Vcc = 3V, over full bandwidth, T=25°C Antenna Architecture 1 dB Bandwidth 10dB Return Loss Bandwidth Antenna Gain (with 100mm ground plane) Axial Ratio over Bandwidth Polarization Electrical Architecture Gain @ 1575.42 MHz Gain flatness Out-of-Band Rejection LNA1->SAW -> LNA2 TW4029: Patch -> Pre-filter SAW-> LNA1> SAW -> LNA2, 24dB Typ, 21dB Min (TW4027); , 21dB Typ,18dB Min (TW4029) +/- 2 dB >32 dB (TW4027) >50dB (TW4029) >25 dB >50dB >35 dB >70dB