Bistatic Microwave Measurements Of Simulated Natural Structures

Andrew J Blanchard

doi:10.1117/12.945831

14 July 1988 Bistatic Microwave Measurements Of Simulated Natural Structures

Andrew J Blanchard

Proceedings Volume 0927, Wave Propagation and Scattering in Varied Media; (1988) https://doi.org/10.1117/12.945831
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

Abstract

The paper presents the results of a series of measurements acquired with a novel bi-static polarimetric radar cross section facility. The system operates from 2 to 18 Ghz with full phase amplitude measurement capability. In addition the facility is supported in a capability to construct distributed target model that resemble natural structures such as rough surfaces, vegetation and other volumetric targets. This paper describes measurements from a vegetation like structure, a dense vertically structured media and measurements of simple geometric components. The measurements from the vegetation like media were used to evaluate the effect of the backscatter as a function of leaf angle distribution and leaf shape three leaf types circular, elliptic and needle shape. Because of the artificial nature of the canopy the same distributions and densities could be implemented for all three leaf types. In addition the so called ground truth of the target is well known for comparison to the analytical models. The vertically structured dense media was constructed to test the scattering behavior for media with densities over 10% to 22 %. The cylindrical structure was chosen to investigate the polarization and phase behavior of the like polarized linear scattering coefficients as a function of density. The measurements of simple scattering structures consisted of bistatic measurements for circular and elliptic disks with two permittivities (conductive and er = 28). Measurements were acquired over the 4 to 12 Ghz band for incident angle of 0 and 45 degrees. Both monostatic and bistatic angles in the forward scatter direction were measured.

Citation Download Citation

Andrew J Blanchard "Bistatic Microwave Measurements Of Simulated Natural Structures", Proc. SPIE 0927, Wave Propagation and Scattering in Varied Media, (14 July 1988); https://doi.org/10.1117/12.945831

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