Fast Analysis of Electromagnetic Transmission Through Arbitrarily Shaped Airborne Radomes Using Precorrected-FFT Method

Nie, Xiao-Chun; Yuan, Naichang; Li, Le‐Wei; Yeo, T.S.; Gan, Yeow-Beng

doi:10.2528/pier04100601

Cited by 28 publications

(18 citation statements)

References 23 publications

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“…It usually requires O(N 2 ) memory to store the impedance matrix and O(N 2 ) operations to perform the matrix-vector product via an iterative solver, where N is the number of unknowns. The memory requirements and CPU time for solving the matrix equation are dramatically reduced by using some fast algorithms in the MoM such as Precorrected-FFT method (P-FFT) [7,8], Adaptive Integral Method (AIM) [9][10][11][12][13][14] and Multilevel Fast Multipole Algoithm (MLFMA) [15,16].…”

Section: Introductionmentioning

confidence: 99%

Interpolation Scheme Based on Adaptive Integral Method for Solving Electrically Large Radiation Problem by Surface/Surface Configuration

Wang¹,

Gong²,

Jin³

et al. 2010

PIER M

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Abstract-A novel interpolation scheme based on Adaptive Integral Method (AIM) is presented to solve electrically large radiation problem of conducting surface/surface configurations. For a complex structure that involves wires and surfaces, three basis functions must be assigned to surfaces, wires and wire/surface junctions. To simplify this, the thin strips with no thickness instead of wires are proposed, and the wire/surface junctions can be replaced by surface/surface junctions, thus it is only necessary to define a uniform basis function. The Electric Field Integral Equation (EFIE) is solved using the Method of Moments (MoM) to obtain the equivalent surface current on PEC surfaces. To facilitate the analysis of electrically large radiation problem, the interpolation scheme based on AIM is employed to accelerate the matrix-vector multiplications and reduce matrix storage. Numerical results are presented to demonstrate the accuracy and efficiency of the technique.

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Section: Introductionmentioning

confidence: 99%

Interpolation Scheme Based on Adaptive Integral Method for Solving Electrically Large Radiation Problem by Surface/Surface Configuration

Wang¹,

Gong²,

Jin³

et al. 2010

PIER M

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“…Nowadays, various processing techniques have been developed to prepare both the porous and dense Si 3 N 4 ceramics for structural and functional applications [8][9][10][11][12]. The defined frequencies are often used for active or half-active selfdirection missile system, while the broadband (such as 1 ∼ 18 GHz) wave transmission efficient is often used for passive self-direction missile application, which is greatly determined by the radome wall structure [13,14], as shown in Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Optimal Design and Preparation of Broadband Ceramic Radome Material With Graded Porous Structure

Chen¹,

Shen²,

Zhang³

2010

PIER

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Abstract-Silicon nitride (Si 3 N 4 ) ceramic is a promising ultra-high speed (> 5 mach) broadband (1-18 GHz) radome material because of its excellent high-temperature resistance, good mechanical and dielectric properties. Si 3 N 4 ceramics with A-sandwich wall structure are successfully applied to passive self-direction high transmission efficiency broadband radome (1-18 GHz). In the present study, a novel graded porous wall structure for broadband radome is promoted. The feasibility of using this structure is carried out by a computer aided design for the wall structure based on the microwave equivalent network method. By optimizing the layer number (n), structural coefficient (p), thickness (d) and dielectric constant (ε) of each layer, the power transmission efficiency at 1-18 GHz of graded porous Si 3 N 4 ceramic radome is calculated. Si 3 N 4 ceramics with graded porous structure are then prepared according to the design. The prepared sample exhibits a good graded porous structure with the porosity range from ∼ 2% to 63 %. The tested power transmission efficiency at 1-18 GHz for the obtained sample matches well with the calculation results, indicating that the graded porous structure is feasible for the broadband radome application.

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“…For an antenna-radome structure, the precise numerical model can be established by using method of moments (MOM) [3][4][5]. Unfortunately, the MOM analysis costs so large amount of computer memory and CPU time that the conventional personal computer can not accomplish the task, when the electrical size of the radome is very large, though some accelerating methods could be adopted [6][7][8]. Some high frequency techniques are suitable for electrically large radomes [9,10] but not accurate for discontinuous structures on the radome surfaces.…”

Section: Introductionmentioning

confidence: 99%

More Accurate Hybrid Po-Mom Analysis for an Electrically Large Antenna-Radome Structure

Hu¹,

Xu²,

He³

et al. 2009

PIER

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Abstract-More accurate hybrid PO-MOM process combining physical optics (PO) with method of moment (MOM) is employed to analyze an electrically large antenna-radome structure. The mutual interactions among the antenna, the inner and outer surfaces of the radome are considered through a group of associated integral equations. In the analysis, the antenna surface and the sharp tip part on the radome surface are modeled accurately by using MOM while the rest smooth parts on the radome surfaces are approximated by using PO. Numerical results indicate that the hybrid process presented in this paper is much more accurate than the conventional PO-MOM ones.

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Fast Analysis of Electromagnetic Transmission Through Arbitrarily Shaped Airborne Radomes Using Precorrected-FFT Method

Cited by 28 publications

References 23 publications

Interpolation Scheme Based on Adaptive Integral Method for Solving Electrically Large Radiation Problem by Surface/Surface Configuration

Interpolation Scheme Based on Adaptive Integral Method for Solving Electrically Large Radiation Problem by Surface/Surface Configuration

Electromagnetic Optimal Design and Preparation of Broadband Ceramic Radome Material With Graded Porous Structure

More Accurate Hybrid Po-Mom Analysis for an Electrically Large Antenna-Radome Structure

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