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Antenna-Scattering Measurements by Modulation of the Scatterer

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2 Author(s)
Scharfman, H. ; Radiation Lab., Johns Hopkins University, Baltimore, Md. ; King, D.D.

An indoor method for measuring the radar cross section of objects by modulating the position of the object is described. The use of synchronous detection and employment of a substitution technique wherein the scattering from an object under test and a known object are measured and compared simultaneously reduce measurement error to ±2 per cent. The characteristics of the system are discussed, and its advantages and limitations are compared with other systems. Measured curves for the back-scattering cross-section of dipoles for lengths from 0.4¿ to 1.6¿ show good agreement with other published theoretical and experimental curves. Methods for measuring back-scattering and off-angle scattering from irregular objects by extension of this technique are indicated.

Published in:

Proceedings of the IRE  (Volume:42 ,  Issue: 5 )