NAVISP Element 2 Tallysman project successfully concluded!

To find a presentation summarizing the now completed activity, click here and to find a link to a GPS World article describing the antenna, click here.

 

The Tallysman activity developed under NAVSIP element 2 was successfully completed. A new antenna called the VeroStarTM, which is a patented, industry leading performance rover antenna with sufficient bandwidth to receive all existing and currently planned GNSS signals, including L-band correction signals. The VeroStarTM antenna has excellent sensitivity at low elevation angles, high efficiency, very low axial ratio, and high phase center stability.

 

These features make the VeroStarTM an ideal rover antenna where low elevation angle tracking is required and bring new levels of positional accuracy, and benefits, to users. 

Highlights of the project include:

  • Measurements indicate an antenna whose performance is among the best in the world, but with costs in line with medium priced competition.
    • A typical gain of 4 dBic at zenith over the whole GNSS spectrum
    • Excellent radiation patterns with low gain roll-off for exceptional low elevation GNSS and L-Band tracking
    • High efficiency (≥70%) yielding strong carrier to noise ratio
    • Low axial ratio (3 dB max at horizon) for high multipath rejection
    • Tight Phase Center Variation (± 2mm) for precise positioning 
    • LNA: Advanced Filtering with optimised Noise Figure for high G/T
       
  • The design is simple, lightweight and robust, and production is straight forward, with no complex elements. The antenna element is available to OEM’s or packaged in several robust IP69K housings.
  • While the standard element is small (approx 193 cm3, <85g), a mini version (98 cm3) extends that advantage by a further 50% at a cost of only approximately 1 dB of gain performance.
  • The wide bandwidth and high performance at low elevations means the antenna is well suited to also receive L-Band signals from Geostationary satellites at elevation angles as low as 10 degrees above the horizon, allowing systems to also incorporate GPS correction signals with a single antenna.

The VeroStarTM has ideal design and performance for Real-Time Kinematic (RTK) and Precise Point Positioning (PPP, receiving low elevation L-Band Corrections) applications. It is a significant advance in antenna technology for the GNSS marketplace that will find application in many sectors, including new and evolving areas such as arrayed antennas and smart antennas. As well, its combination of high performance, light weight and low cost allow it to address requirements that to this point have been unmet by other offerings currently available in the marketplace.