A New Method for Determining the Scattering of Linear Polarized Element Arrays

Lu, Bin; Gong, Shuxi; Zhang, Shuai; Ling, and Jin

doi:10.2528/pierm09031804

Cited by 19 publications

(9 citation statements)

References 12 publications

(10 reference statements)

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“…According to the RCS definition [2], the antenna RCS is the product of

σ_{normale}

and

σ_{normala}

that denote the scattering element factor and scattering array factor, respectively. The path length between radar signal and element m is

r_{m}

away.…”

Section: Structure and Scattering Array Factor Coupling Modelmentioning

confidence: 99%

See 1 more Smart Citation

Electromechanical coupling based influence of structural error on radiation and scattering performance of array antennas

Wang

et al. 2017

Electron. lett.

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A new structure and scattering array factor coupling model, for estimating the effect of element position error of active phased-array antenna on its radar cross section (RCS) is established, based on the relationship between structural position error and phase difference. The model greatly reduces the computational complexity of the RCS for the evaluation of array antenna performance. Based on the model, the influence of the element position error on the gain and RCS is analysed with the results showing that a reasonable reduction in element position accuracy may effectively decrease the RCS. Thus, the developed model can be applied in engineering to balance the radiation and scattering properties. With the necessary radiation and scattering performance guaranteed, the antenna processing and installation tolerances can be properly relaxed to effectively reduce the calibration difficulty and cost.

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“…According to the RCS definition [2], the antenna RCS is the product of

σ_{normale}

and

σ_{normala}

that denote the scattering element factor and scattering array factor, respectively. The path length between radar signal and element m is

r_{m}

away.…”

Section: Structure and Scattering Array Factor Coupling Modelmentioning

confidence: 99%

“…Assume that the position errors in the x , y , and z directions satisfy the normal distribution with mean of 0 and standard derivation of

λ / 10

. Considering the scattering element factor

σ_{normale}

of half‐wavelength dipole [2], the scattering pattern function can be obtained.…”

Section: Verification Of Coupling Modelmentioning

confidence: 99%

Electromechanical coupling based influence of structural error on radiation and scattering performance of array antennas

Wang

et al. 2017

Electron. lett.

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“…The polarization state of a beam of light is traditionally described by a vector I = (I, Q, U, V ) T composed of four Stokes parameters (T means transpose) [14][15][16][17][18][19][20][21][22][23]. The first Stokes parameter, I, is the intensity, while the other three parameters describe the polarization state of the beam.…”

Section: Theory and Definitionsmentioning

confidence: 99%

Depolarization and Polarization of Light Scattering by Dustlike Tropospheric Aerosols

Sun

Wang

Shen

et al. 2010

Journal of Electromagnetic Waves and Applications

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Measurement of the polarization and depolarization characteristics of light scattering by aerosols is a powerful remote sensing technique for retrieving the microphysics of aerosol particles. In this paper, we model dust-like aerosols using mixtures polydisperse, randomly oriented spheroids with varying aspect ratios from 0.6 µm to 2.0 µm at the wavelength of 0.443 µm and 0.865 µm. The Stokes scattering matrix elements averaged over wide shape distributions of spheroids are compared with those computed for polydisperse randomly oriented single scattering spheroids. The shape-averaged phase function for a mixture of spheroids is smooth, featureless, and nearly flat at side-scattering angles and closely resembles those typically measured for natural sand and dust particles. The linear and circular depolarization ratios were computed using the rigorous T -matrix method. We also show that there is no simple relationships between the depolarization ratio and aspect ratio, and an single spheroidal shape particles cannot be used to model natural dust aerosols.

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“…Then, based on the expression in Ref. 3, a method was presented in Ref. 4 for synthesizing desired scattering pattern by adjusting the dipole positions.…”

Section: Introductionmentioning

confidence: 99%

“…However, this method might not be used to automatically control the radar cross section (RCS) levels of the main lobe and the sidelobes. To overcome this problem, in a way the similar to the radiation pattern multiplication method [2], Lu et al [3] indicated that the RCS of an array can also be expressed as the product of an array factor and an element factor. Then, based on the expression in Ref.…”

Section: Introductionmentioning

confidence: 99%

Optimized element positions for prescribed radar cross section pattern of linear dipole arrays

Zhang

Gong

Guan

et al. 2011

Int J RF and Microwave Comp Aid Eng

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Approximate closed-form expression is derived for the scattering from dipole arrays based on the equivalent circuit theory. Then, a method is proposed for synthesis of dipole arrays to produce desired scattering pattern using genetic algorithm (GA). In the synthesis method, the element positions in an array are considered as the optimization parameter and the derived expression is used to evaluate the fitness function of GA. To assess the validity and efficiency of the proposed method, several linear dipole arrays are designed to obtain scattering pattern with low sidelobe level (SLL). A good agreement between the patterns calculated using the expression and simulated by FEKO validates the accuracy of the presented expression. In addition, the numerical results show that the maximum SLL of the scattering pattern is considerably reduced by optimization. V C 2011 Wiley Periodicals, Inc. Int J RF and Microwave CAE 21:622-628, 2011.

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A New Method for Determining the Scattering of Linear Polarized Element Arrays

Cited by 19 publications

References 12 publications

Electromechanical coupling based influence of structural error on radiation and scattering performance of array antennas

Electromechanical coupling based influence of structural error on radiation and scattering performance of array antennas

Depolarization and Polarization of Light Scattering by Dustlike Tropospheric Aerosols

Optimized element positions for prescribed radar cross section pattern of linear dipole arrays

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