Mini Choke Ring Antenna Receives GNSS Calibration

By Mike Ball / 29 Sep 2021

HX-CGX611A mini choke GNSS antennaHarxon Corporation has confirmed that its HX-CGX611A mini choke antenna has undergone GNSS antenna calibration by leading calibration facility Geo++. Featuring a miniaturized choke ring structure, the HX-CGX611A is ideal for UAV (unmanned aerial vehicle) base stations and other applications that require robust positioning accuracy.

The Geo++ calibration method determines the absolute antenna phase center offsets in the horizontal and vertical position, as well as the absolute elevation and azimuth dependent phase center (PCV) and group delay variations (GDV) for multiple GNSS antenna frequencies. The resulting PCV and GDV are completely independent of the reference antenna used in the calibration procedure. Both results allow for complete correction of the antenna’s receiving characteristics.

As a result of the calibration, the HX-CGX611A choke ring GNSS antenna now exhibits a highly favorable phase center reliability. All frequencies of the GPS, GLONASS, Galileo and BeiDou constellations have been calibrated and data is now more precise. The maximum phase center variability of all frequencies is within 0.88mm, meeting the requirements of sub-millimeter level positioning accuracy. The typical value of PCV from zenith to 5° elevation is less than 1.5mm, and the largest value is 2mm. The RMS typical value is less than 0.05mm, with a largest value of 0.08mm.

Posted by Mike Ball Mike Ball is our resident technical editor here at Unmanned Systems Technology. Combining his passion for teaching, advanced engineering and all things unmanned, Mike keeps a watchful eye over everything related to the unmanned technical sector. With over 10 years’ experience in the unmanned field and a degree in engineering, Mike’s been heading up our technical team here for the last 8 years. Connect & Contact