Attitude Error From Phase Center Uncertainty in an Interferometric GPS Antenna Array

2006 ◽  
Author(s):  
Al Treder
Keyword(s):  
Antenna Array ◽  
Phase Center ◽  
Attitude Error ◽  
Gps Antenna

Impact of GPS antenna phase center variations on precise orbits of the GOCE satellite

2011 ◽  
Vol 47 (11) ◽  
pp. 1885-1893 ◽  
Author(s):  
H. Bock ◽  
A. Jäggi ◽  
U. Meyer ◽  
R. Dach ◽  
G. Beutler
Keyword(s):  
Phase Center ◽  
Antenna Phase ◽  
Antenna Phase Center ◽  
Phase Center Variations ◽  
Gps Antenna ◽  
Goce Satellite

GPS Antenna Used in Tracking and Identifying Cargo

2013 ◽  
Vol 756-759 ◽  
pp. 655-659 ◽  
Author(s):  
Yong Li ◽  
Chuan Yun Zou
Keyword(s):  
Return Loss ◽  
Axial Ratio ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Axis Ratio ◽  
Phase Center ◽  
Electronic Label ◽  
Power Splitters ◽  
The Stability ◽  
Gps Antenna

In order to track and identify remote cargo with electronic label, the electronic label may carry GPS module. To GPS modules antenna, not only the factors such as impedance bandwidth and axial ratio bandwidth are considered, but also the stability of the phase center is more concerned about, due to it determines the precision and accuracy of location. At the same time it requires that axial ratio is less than 3 db in wide angle range of elevation theta. Realizes circular polarized GPS antenna through the orthogonal 4-fed mode and Wilkinson power splitters, in addition, calibrates and optimizes the average phase center of antenna through the optimization algorithm. The simulation results show that GPS antenna works in the L-band 1.575 GHz,impedance bandwidth in which return loss less than-10 db achieves 91.4 MHz,and coverages: 1.5358 ~ 1.6272 GHz; 3db axis ratio bandwidth achieves 305 MHz in the biggest gain direction of XOZ section;In the center frequency point 1.575 GHz, elevation theta which corresponds 3db axis ratio coverages: -119.2°to 111.5°; The stability of the phase center is less than 3 mm.

A New Approach for Field Calibration of Absolute GPS Antenna Phase Center Variations

Navigation ◽  
1997 ◽  
Vol 44 (2) ◽  
pp. 247-255 ◽  
Author(s):  
GERHARD WÜBBENA ◽  
MARTIN SCHMITZ ◽  
FALKO MENGE ◽  
GÜNTER SEEBER ◽  
CHRISTOF VÖLKSEN
Keyword(s):  
Phase Center ◽  
New Approach ◽  
Field Calibration ◽  
Antenna Phase ◽  
Antenna Phase Center ◽  
Phase Center Variations ◽  
Gps Antenna
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