Backscattering for circular polarisation

Long, Maurice W.

doi:10.1049/el:19660288

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…A recent analysis considered a crystal wave guide whose conductivity varied with depth according to a simple algebraic relation [Schwering et al, 1968]; this analysis led to a total attenuation rate of 0.256 db/km at 1 kHz, which is consistent with early calculations of Wait for an exponentially varying conductivity. New measurement techniques were reported [Tsao and de Bettencourt, 1967] mann, 1968a, b;Fung, 1967bFung, , c, 1968aFung, , 1969HagIors, 1967;Valenzuela, 1967Valenzuela, , 1968aLong, 1966]. Although multiple scatter is a strong contributor to depolarized backscatter [Valenzuela, 1967], single-scatter models for backscatter from rough dielectric surfaces also can account for some depolarization /Beckmann, 1968b; Fung, 1967c].…”

Section: Diffraction Of Radio Waves By Terrain Obstacles Has Been Trementioning

confidence: 99%

Commission 2: Progress in Radio and Non‐Ionized Media

Hogg¹,

Atlas²,

Bean³

et al. 1969

Radio Science

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The past three years evidence vigorous activity in the areas of interest to Commission 2, especially those concerned with planetary atmospheres, rough surfaces, effects of turbulence, and the general applicability of millimeter waves for scientific study and for communications. If any particular study were to be designated outstanding, it might be the investigation of clear‐air structure by microwave radar, but meaningful advances have been made in all of the areas discussed.

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Section: Diffraction Of Radio Waves By Terrain Obstacles Has Been Trementioning

confidence: 99%

Commission 2: Progress in Radio and Non‐Ionized Media

Hogg¹,

Atlas²,

Bean³

et al. 1969

Radio Science

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“…As performance demands on radar become more severe, it is increasingly important that the complete scattering of the target be investigated and utilized. The polarization scattering matrix as defined by Sinclair [1] and expanded by Kennaugh [2] and Long [3] is a useful device for representing the scattering properties of a radar target. This scattering matrix is defined as FE (1) where ER represents the electric field on reception and ET represents the incident transmitted electric field at the target; range dependence has been suppressed.…”

Section: Introductionmentioning

confidence: 99%

Statistical Characteristics ics of the Polarization Power Ratio for Radar Return with Circular Polarization

Ecker

Cofer

1969

IEEE Trans. Aerosp. Electron. Syst.

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In this paper, the radar return from a clutter target illuminated by a circularly polarized wave is investigated statistically. The ratio of the envelope of the left circular component to that of the right circular component of the return signal is formed, and the probability density functions and cumulative distributions of this ratio are found fcr linear, square, and logarithmic law detectors. Plots of all densities and distributions are given for several statistically modeled clutter-type targets with typical depolarizing and back-scattering characteristics. The probability density functions for the ratio signal from a logarithmic detector are compared for the cases of circularly and linearly polarized waves incident on the same clutter-type target. Linear polarization produces the worst case of spreading of the probability density function from its median value. Plots are given which indicate that changes in the amount of depolarization by the clutter cause more significant changes in the median value of the polarizationratiofor linear than for circular polarization.

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