Home > VeraPhase® Technology
pleased to introduce patented technology which produces the highest
performing GNSS antennas in the World. The VeraPhase® technology
This technology has proven to have a more stable PCV through all elevations and azimuths than any other antenna technology available today. For elevation angles greater than 15 degrees, the PCV varies less than 1mm making this technology ideal for RTK and PPP systems without having to rely upon antenna calibration data (such as RINEX files). Please refer to this document: VeraPhase Antenna for Survey Use
The stability and tightness of the PCV with respect to elevation and
azimuth angles is unrivaled by any other antenna technology. As a
result, the VeraPhase antennas are essentially insensitive to
mis-orientation to North and not being level. This makes the antennas
ideal for measuring movement and in moving situations, such as a rover
in an RTK system.
The basic antenna structure has crossed driven dipoles which are fed
in quadrature and tuned to the L2 frequency and a coupled radiating
element dimensioned to resonate at L1. These components are positioned
in an unusual circular waveguide with the back end tapered and shorted
and with the upper edge formed as a non-uniform saw tooth shape. The
upper part of the waveguide is built of many vertical strap conductors
on a fixed radius and one circumferential strap conductor. This unusual
structure allows the equalization of the magnitude and the achievement
of quadrature phase of the z directed current and phi directed currents.
Please download our White Paper which provides much more technical detail about this exciting new technology: Tallysman Veraphase 6000 – White Paper
Dr. Richard Langley and Ryan White of the University of New Brunswick have compared the performance of the VeraPhase antenna to choke ring antennas. Their study results can be downloaded here.