The average backscattering cross section of clouds of randomized resonant dipoles

Wickliff, R.; Garbacz, R.

doi:10.1109/tap.1974.1140813

Cited by 36 publications

(16 citation statements)

References 1 publication

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“…For chaff cloud, the coupling among chaff elements can be neglected when the distance between chaff elements is more than two lambdas [3]. That is, the chaff cloud is sparse under this situation.…”

Section: The Analysis For Three Typical Orientation Distributions Of mentioning

confidence: 99%

Jamming recognition method based on the full polarisation scattering matrix of chaff clouds

Tang

Sheng

2012

IET Microwaves, Antennas &Amp; Propagation

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This article studies the probability density function (PDF) of the polarisation -radar cross-section (RCS) ratio based on the polarisation rotation transformation, of chaff cloud with all possible rotation angles. The PDF of this ratio is different between chaff cloud and a single dipole, even when the chaff cloud is sparse. The results indicate that the PDF of the chaff cloud polarisation -RCS ratio is different from that of other radar targets such as aircraft and missiles, which provides a key to discriminate chaff jamming among other targets. An analytical formula of the PDF of the polarisation -RCS ratio for chaff cloud with arbitrary orientation distribution is presented and validated by numerical electromagnetic simulation results for sparse and dense chaff clouds, respectively. In addition, three typical orientation distributions are analysed in detail. Based on this formula of the PDF, a pilot study is also carried out to compare the chaff cloud radar signature of this ratio with other targets, which confirms the feasibility of chaff-jamming recognition by computing the posterior probabilities.

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Section: The Analysis For Three Typical Orientation Distributions Of mentioning

confidence: 99%

Jamming recognition method based on the full polarisation scattering matrix of chaff clouds

Tang

Sheng

2012

IET Microwaves, Antennas &Amp; Propagation

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“…Vast dipoles can form chaff clouds used in electronic counter measures. The backscattered field of chaff clouds can be obtained by summing the backscattered field of all dipoles when the average spacing among dipoles is more than two wavelengths, that is, when the chaff cloud is sparse [2]. Then the radar cross sections (RCS) of sparse chaff clouds are the amount of RCSs of all randomly distributed dipoles.…”

Section: Introductionmentioning

confidence: 99%

“…Then the radar cross sections (RCS) of sparse chaff clouds are the amount of RCSs of all randomly distributed dipoles. According to the central limit theorem, the RCS of sparse chaff clouds usually satisfies the exponential distribution [2] [3]. The polarization characteristics are another important aspect of the chaff backscattering; the statistical characteristics of backscattering matrix of sparse chaff clouds were studied in [4] [5].…”

Section: Introductionmentioning

confidence: 99%

The simulation of statistical characteristics of dense chaff clouds

Tang

Sheng

2013

2013 IEEE Global High Tech Congress on Electronics

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The probability density functions (PDF) of the elements in the backscattering matrix of dense chaff clouds with small volume are studied through simulation in this paper. It is found that the phase of the co-polarization elements satisfies bell shaped distribution. And the amplitude of the co-polarization elements satisfies Rice distribution. The cross-polarization elements satisfy the same kind distribution with that of the sparse. Six computing examples of chaff clouds with different sizes, shapes, and densities are given.

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“…Early analysis for the RCS of conducting resonant dipoles used a method of moment (MoM) [3,4]. The MoM is one of the approaches using Maxwell's integral equation and provides a very accurate solution by virtue of considering mutual coupling between scatterers.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Method for Computing the RCS of Wire Scatterers With an Arbitrary Orientation

Seo¹,

Yoo²,

Kwon³

et al. 2010

PIER B

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Abstract-A hybrid method is proposed to compute the radar cross section (RCS) of multiple wire scatterers with an arbitrary orientation. Foldy-Lax equations in vector form are transformed into self-consistent equations for including the multiple scattering effects between scatterers. A thin-wire approximation of a method of moment (MoM) is used for calculating the scattering transition operator of a single wire scatterer. To verify the proposed method, two measurement models are fabricated and measured in a compact range chamber. The measured results agree well with the results of the proposed method.

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The average backscattering cross section of clouds of randomized resonant dipoles

Cited by 36 publications

References 1 publication

Jamming recognition method based on the full polarisation scattering matrix of chaff clouds

Jamming recognition method based on the full polarisation scattering matrix of chaff clouds

The simulation of statistical characteristics of dense chaff clouds

A Hybrid Method for Computing the RCS of Wire Scatterers With an Arbitrary Orientation

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