Abstract:

The problem of inspection and measurement of DBF antenna performance is studied.Mechanical scanning is hard to be implemented after DBF antenna has been installed on vehicle.The beam of DBF antenna can be scanned electronically towards different azimuth angles,based on which a new mearsurement method of obtaining DBF antenna pattern indirectly is proposed.The relative measurement errors in beam width, sidelobe level,and beam directivity are analyzed afterwards.Simulations are carried out both in normal condition and abnormal condition.The results are the same as those measured by conventional spinning measurement method.The relative measurement errors in beam width, sidelobe level,and beam directivity are small.The simulation results show the effectiveness of this method.

Key words: DBF antenna, antenna measurement, beam scanning, antenna pattern, error analysis