| 摘要 |
<p>#CMT# #/CMT# The method involves using an aircraft i.e. drone (50) equipped with a broad band directing antenna (51). A level of signal received by a dipole is measured, and phase differences between each dipole of the antenna are measured for each frequency during a rotation of the aircraft around the antenna. A quality score of the received signal is determined by comparing the signal level with a signal level expected for an angle of emission. Values of differences between a measured incident angle and a theoretical incident angle are stored in a calibration table for a value of frequency. #CMT# : #/CMT# An independent claim is also included for a system for calibrating a fixed antenna. #CMT#USE : #/CMT# Method for calibrating a fixed antenna installed on top of pylon, mast or building, or in a mast of a ship. #CMT#ADVANTAGE : #/CMT# The method enables avoiding movement of the antenna for calibrating or recalibrating the antenna and calibrating the fixed antenna for different angles of elevations to improve precision of the determination of elevation angle. The method enables minimizing calibration or recalibration cost of the antenna. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic block diagram of a system for calibrating a fixed antenna. 41 : Processor 45 : Flight sensor 46 : Actuators 50 : Drone 51 : Broad band directing antenna.</p> |
