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Array pattern rapid calculation method based on coupling compensation matrix and NuFFT

A technology of array orientation and compensation matrix, applied in the field of fast calculation of non-periodic array pattern, can solve the problem that coupling effect between array elements cannot be considered, and achieve the effect of improving design efficiency, saving time and improving efficiency

Pending Publication Date: 2022-05-10
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a kind of fast calculation method of non-periodic array pattern considering coupling effect based on coupling compensation matrix and non-uniform fast Fourier transform (NuFFT), can consider array coupling effect Compared with the traditional field superposition method, it can improve the efficiency of the array pattern; in addition, compared with the simple FFT method to calculate the array factor, it avoids the traditional FFT or NuFFT, etc. The method cannot consider the defect of the coupling effect between array elements, and combines the advantages of both; in scenarios that require dense array pattern calculation, such as the field of array synthesis, it can save a lot of time and improve design efficiency while ensuring accuracy

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  • Array pattern rapid calculation method based on coupling compensation matrix and NuFFT
  • Array pattern rapid calculation method based on coupling compensation matrix and NuFFT
  • Array pattern rapid calculation method based on coupling compensation matrix and NuFFT

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Embodiment 1

[0062] One-dimensional linear array, the array is a dipole periodic array composed of N=6 elements, and the antenna element spacing is 0.5λ (λ is the wavelength corresponding to the working frequency), such as figure 2 shown. The array excitation adopts equal-amplitude and in-phase excitation; the array element AEP and the isolated element pattern are calculated by full-wave simulation software respectively. The calculation result of the traditional array pattern and the calculation result of the array pattern of this method are obtained.

[0063] In the embodiment of the present invention, the calculation result of the array pattern by the proposed method is compared with the result of multiplying the array factor by the element factor and the full-wave simulation software to illustrate the excellent effect of the method in terms of calculation accuracy and efficiency. Such as image 3 The array patterns shown correspond to the simulation results of the full-wave simulatio...

Embodiment 2

[0065] Two-dimensional planar array, the array is composed of 8×8 microstrip antennas arranged in a sparse manner, such as Figure 4 shown. The array excitation adopts equal-amplitude and same-phase excitation. The AEP of the array unit and the direction diagram of the isolated unit are calculated by the full-wave simulation software respectively. The calculation result of the traditional array pattern and the calculation result of the array pattern of this method are obtained. From such as Figure 5 From the results shown, this method is more accurate than the array electric field pattern obtained by multiplying the array factor and element factor, and is more consistent with the full-wave simulation results. Although the error of the result will expand in some angles, it still has certain advantages compared with the traditional result.

[0066] The method proposed by the present invention is a fast calculation of an array pattern based on NuFFT technology through a coup...

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Abstract

The invention relates to the technical field of array antennas, in particular to an array directional diagram rapid calculation method based on a coupling compensation matrix and NuFFT, and the method comprises the steps: sequentially obtaining an active unit directional diagram of each unit of an array in full-wave simulation software; and respectively calculating the array pattern of the traditional field superposition method and the array pattern of the active unit pattern. The excitation of the array directional diagram of the traditional field superposition method is adjusted, so that the mean square error of the array directional diagram obtained by adopting the field superposition method and the array directional diagram considering the coupling effect in the whole space is minimum, a corresponding compensation excitation compensation coefficient is obtained, and the original excitation is compensated when an ideal array factor is calculated by adopting NuFFT. According to the method, the array coupling effect is considered when the NuFFT technology is applied to calculate the non-periodic array directional diagram. In addition, due to the application of the NuFFT technology, the calculation efficiency can be remarkably improved, and finally accurate and efficient calculation of the array radiation pattern is achieved.

Description

technical field [0001] The invention relates to the technical field of array antennas, in particular to a fast calculation method for an aperiodic array pattern considering a coupling effect based on a coupling compensation matrix and a non-uniform fast Fourier transform. Background technique [0002] Phased array antennas play a very important role in wireless communications, military applications, medical and health care, electromagnetic imaging, and deep space exploration. However, the simulation calculation of arrays is still limited by computing resources, which leads to problems such as a long research cycle. Currently, the pattern calculation method for arrays is based on the pattern product theorem. In this method, by assuming that all array elements have the same pattern, the array pattern is decomposed into the product of the array factor and the element element factor to obtain the actual pattern of the array. In the calculation of the array factor, since the ex...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/14
CPCG06F17/142
Inventor 廖成彭樊程友峰李镇江
Owner SOUTHWEST JIAOTONG UNIV