Optimum Spatial Arrangement of Array Elements for Suppression of Grating-Lobes of Radar Cross Section

Lu, Bin; Gong, Shu Xi; Zhang, Shuai; Guan, Ying; Jin, Lu

doi:10.1109/lawp.2010.2044230

Cited by 30 publications

(17 citation statements)

References 7 publications

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“…The terminal current at each dipole can be calculated using (4). The scattering from the mth dipole in the farzone due to the re-radiation of the terminal current I m is given by […”

Section: The Novel Synthesis Methods For Prescribed Rcs Pattern Ofmentioning

confidence: 99%

“…(10) is used to evaluate the fitness function of GA. Since (10) can take the mutual coupling effects into account, the proposed synthesis method is a more accurate iterative technique compared with the one described in our previous work [4]. Here, we only consider the MRCS pattern in the y ¼ p/2 plane, so the fitness function of GA is defined as…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…3, a method was presented in Ref. 4 for synthesizing desired scattering pattern by adjusting the dipole positions. However, this method does not fully consider the mutual coupling effects.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…The terminal current at each dipole can be calculated using (4). The scattering from the mth dipole in the farzone due to the re-radiation of the terminal current I m is given by […”

Section: The Novel Synthesis Methods For Prescribed Rcs Pattern Ofmentioning

confidence: 99%

Section: Synthesis Methodsmentioning

confidence: 99%

See 1 more Smart Citation

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

Self Cite

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show abstract

“…Nevertheless, the shift of phase will be only perpendicular to the direction of propagation if Γ mn is a pure imaginary number when the amplitude is in reduction, and it is called attenuation mode. Dominant mode of Floquet mode can be defined in condition of m = n = 0; otherwise (e.g., m = 0 or n = 0), the radiation beam can be expressed as grating lobe [14]. Counted by mathematical method of separation of variables, Floquet mode are, essentially, solutions of electromagnetic field equation with periodic boundary conditions.…”

Section: Theoretical Analysismentioning

confidence: 99%

Quasi-Optical Frequency Selective Surface for Atmospheric Remote Sensing Application

Xia¹,

Zhang²,

Huang

et al. 2013

PIER M

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Abstract-The design of an efficient quasi-optics Frequency Selective Surface (FSS) filter which is required to provide a −3 dB pass band from 405 GHz to 441 GHz is presented. For atmospheric remote sensing application, this space-borne spatial device consists of a silicon layer and a thin copper layer which is perforated with periodic arrays of resonant dipole slots and circular apertures. FSS unit cell has a dimension much smaller than its operating wavelength. Unique features of this complex dense FSS structure include wide pass band properties with superb performance of frequency response and incident angles independence for TE polarization. Floquet mode analysis and finite element method (FEM) models are used to establish the geometry of the periodic structure and predict its spectral response.

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“…The same author also presented an antenna pattern synthesis to attain broad nulling in [15]. The work in [16] meanwhile manipulated the spatial arrangement of the antenna to suppress the grating lobes in the beam pattern while [12] focused on achieving narrow beam and low side lobe level (SLL) in the radiation pattern.…”

Section: Introductionmentioning

confidence: 99%

A Pareto Elite Selection Genetic Algorithm for Random Antenna Array Beamforming With Low Sidelobe Level

Jayaprakasam¹,

Rahim²,

Leow³

2013

PIER B

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Abstract-Random antenna array (RAA) that uses the conventional beamforming method produces a poor beam pattern with high sidelobe level. This greatly reduces the performance and the efficiency of the antenna. The use of Genetic Algorithm (GA) to find the best positions for the antenna elements in RAA to lower the sidelobes has been widely researched. However, there has been no solution proposed for the reduction of sidelobes when the user has no autonomy over the position of the radiating elements, for instance in cases such as emergency communications. This paper proposes a novel Pareto Elite Selection Genetic Algorithm (PESGA) optimization method to reduce the sidelobes in an RAA that has fixed elements' position. The proposed method uses a single fitness function (peak sidelobe level) for parent selection while an additional function (number of sidelobes above a threshold level) is introduced to select the elitist in every generation via Pareto Front (PF) selection. Results indicate that the proposed PESGA method is best used for scenarios where the array size is small. In such cases, the proposed method provides much reduced sidelobe compared to the conventional RAA beamforming method and up to 200% improvements in terms of mainlobe to peak sidelobe ratio compared to GA weight optimized beamforming method.

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Optimum Spatial Arrangement of Array Elements for Suppression of Grating-Lobes of Radar Cross Section

Cited by 30 publications

References 7 publications

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

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

Quasi-Optical Frequency Selective Surface for Atmospheric Remote Sensing Application

A Pareto Elite Selection Genetic Algorithm for Random Antenna Array Beamforming With Low Sidelobe Level

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