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Embedded 12-gram Full-Band GNSS Helical Antenna for Weight-critical Applications - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Embedded 12-gram Full-Band GNSS Helical Antenna for Weight-critical Applications - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design
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Tallysman Wireless Inc , Tallysman Wireless ,

Antenna Filtering Mitigates GNSS Interference - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design

Tallysman Wireless announced its new eXtended Filtering (XF) features to the TW3900 series of Accutenna precision antennas. The XF feature is designed to mitigate interference from all near-band signals.
As the radio frequency spectrum has become more congested with many newly-activated Long Term Evolution (LTE) bands for cellular, these signals and their harmonic frequencies can affect GNSS antennas and receivers, according to the company. In North America, the planned Ligado service, which will broadcast in the frequency range of 1526 to 1536 MHz, can affect GNSS antennas that receive space-based L-band correction service signals (1539 – 1559 MHz). New LTE signals in Europe [Band 32 (1452 – 1496 MHz)] and Japan [Bands 11 and 21 (1476 – 1511 MHz)] have also affected GNSS signals. Lastly, the Inmarsat satellite communication uplink (1626.5 – 1660.5 MHz) commonly used on maritime vessels can also affect nearby GNSS antennas. ....

United States , Tallysman Wireless , Xtended Filtering , Long Term Evolution , North America , ஒன்றுபட்டது மாநிலங்களில் , நீண்டது கால பரிணாமம் , வடக்கு அமெரிக்கா ,

Antennas for Iridium STL PNT Signal and for GNSS-Based Timing

Tallysman Wireless introduced two lightweight, compact active Iridium helical antennas: the housed HC610 and the embedded HC610E. They receive the Iridium Satellite Time and Location (STL) signals, used by STL terminals to provide worldwide position, navigation, and timing independent of GPS/GNSS via an encrypted satellite broadcast signal that is strong, secure and can also be received indoors. STL signals present an alternative to augment and authenticate time for applications, such as electrical grids, wireless communications networks, and financial systems, as well as position for private and public infrastructure.
The HC610 and HC610E are active Iridium antennas that operate in receive-only mode and enable Iridium terminals to be installed tens of meters away from the antenna. The antennas feature a precision-tuned helical element that provides an axial ratio and operates without a ground plane. They also feature a low-current, low-noise amplifier (LNA) and pre-filter ....

United States , Tallymatics Inc , Tallysman Wireless , Iridium Satellite Time , Timing Receiver Autonomous Integrity Monitoring , Coordinated Universal Time , ஒன்றுபட்டது மாநிலங்களில் , இரிடியம் செயற்கைக்கோள் நேரம் , நேரம் ரிசீவர் தன்னாட்சி நேர்மை கண்காணிப்பு , ஒருங்கிணைந்த உலகளாவிய நேரம் ,