Evaluating Near-Field Range Multi-Path

Author: Gregory F. Masters

Near-field range design includes the placement of RF absorber in the test area. Absorber placement depends highly on the antennas being tested. A common approach is to design an expensive low-reflection chamber around the near-field scanner. The chamber and the additional floor space can sometimes cost more than the near-field scanning system itself. Another approach seeks to identify multi-path reflection to minimize cost by optimally placing absorber to meet specific antenna test requirements. The result is a lower cost range using less floor space. This paper describes a technique of evaluating near-field range multipath.

 

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