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| Array Mutual Coupling Compensation Method Based on ASM-MBF |
| Received:September 18, 2019 Revised:November 02, 2019 |
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| DOI：10.7643/issn.1672-9242.2020.04.010 |
| KeyWord:MoM macro basis function infinite array approximation array synthesis mutual coupling compensation |
| Author | Institution |
| WANG Nan |
Kunming First Military Representative Bureau of Nary Equipment Department, Kunming , China |
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| Abstract: |
| The work aims to solve the problem that the MoM has too many unknowns and slow calculation in the analysis of array mutual coupling. A mutual coupling analysis method-ASM-MBF which combines macro-base function and infinite array approximation and can be used in the large array was studied. By constructing the MBF high-order macro-base function, the matrix size generated by MoM was reduced. In order to reduce the difficulty of solving the single excitation current distribution of large arrays, the single excitation current distribution of the infinite array was used for approximate analysis and the solution was made by array scanning method (ASM). The results were compared with that calculated by widely used RWG-MOM. Then, based on the ASM-MBF method, the mutual impedance matrix of the array was obtained. The mutual impedance matrix was used to compensate the traditional array synthesis problem without considering mutual coupling between cells. With the increase of the number of MBF on element, the error of the calculation results of RWG-MOM and ASM-MBF was gradually reduced. When the number of MBFs on the unit was 4, the error of the two methods was only -140 dB. At this time, the number of unknowns by ASM-MBF was only 5% of that by RWG-MOM. In case of different element spacing, the mutual coupling compensation methods used achieved excellent compensation effects. Especially when the spacing was small and the influence of mutual coupling was large, the compensated pattern was very close to the ideal situation. The ASM-MBF method can achieve matrix reduction while considering accuracy. Calculating the mutual impedance matrix by this method can effectively compensate the traditional array synthesis problem without considering mutual coupling between cells. |
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