Suppression of Undesired Reflection Using a Spatial Filtering on Bistatic Radar Cross Section Measurements within a Near Zone

Hiroyoshi YAMAZAKI  Kohji KOSHIJI  

IEICE TRANSACTIONS on Communications   Vol.E91-B   No.6   pp.2077-2080
Publication Date: 2008/06/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.6.2077
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Sensing
radar cross section,  spatial filtering,  bistatic,  near-field measurement,  

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Spatial filtering is a useful method to suppress undesired reflection from unwanted scatters in Radar Cross Section (RCS) measurements. Actually, it is difficult to prepare an ideal field which satisfies the far-field criterion for RCS measurements of large targets. We applied the filtering method to a bistatic RCS measurement in a near field and investigated the validity of that method by varying the scanning angular span. Electromagnetic simulations show that predicted RCS profiles from near-field data with unwanted scatters closely matched far-field reference data of the test target. In conclusion, the results show that the method is effective for bistatic RCS measurements in practical field enviroments.