Reflection Suppression To Improve Anechoic Chamber Performance
Authors: Greg Hindman, Allen C. Newell
Reflections in anechoic chambers can limit the performance and can often dominate all other error sources. This paper will show the results of a new technique developed by NSI to suppress reflections and improve performance in anechoic chambers. The technique, named Mathematical Absorber Reflection Suppression (MARS), is a post-processing technique that involves analysis of the measured data and a special filtering process to suppress the undesirable scattered signals. The technique is a general technique that can be applied to any spherical range. It has also been applied to extend the useful frequency range of microwave absorber in a spherical near-field system. The paper will show typical improvements in pattern performance, and will show validation of the MARS technique using data measured on an antenna in a conventional anechoic chamber.