A Technique for Determining Radar Target Scintillation (GLINT).

摘要

A technique is described for obtaining near-zone as well as far-zone GLINT data on aerospace targets based on near-field measurements of the target. A modal expansion in terms of plane wave functions is used to represent the fields scattered by the target. A similar representation is made for the tracker antenna of interest based on measurements of its near fields. The antenna and scattering characteristics are combined using equations presented in the report to predict the received signal at virtually any distance from the target between the measurement plane and infinity. The technique is demonstrated on an F-105 model aircraft and a single plane monopulse tracking antenna at x-band. Excellent agreement between measured and predicted error signal is presented for various fly-bys of the monopulse antenna past the target. Also presented is a new characterization technique for near-field probes which simplifies the process of obtaining their plane wave spectrum. (Author)