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A fast analysis method for mutual coupling characteristics of mimo antennas

A rapid analysis and antenna technology, applied in radio transmission systems, electrical components, transmission systems, etc., can solve the problems of difficult accurate calculation of scattering matrix, complex calculation process, and huge calculation amount, so as to facilitate modular realization and reduce subdivision Quantity, the effect of improving calculation accuracy

Active Publication Date: 2018-03-13
THE PLA INFORMATION ENG UNIV
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Problems solved by technology

[0004] In the present invention, the main methods for analyzing the mutual coupling characteristics of MIMO antennas include the induced electromotive force method, the scattering matrix method and the moment method, and there are the following problems respectively: (1) when calculating the mutual coupling of large-scale complex structure antennas, the induced electromotive force method The calculation process is very complicated, and there are non-negligible calculation errors; (2) As the number of array elements increases, the dimension of the scattering matrix increases, and the scattering matrix will be difficult to calculate accurately; (3) The method of moments is a typical numerical calculation method, it is necessary to divide the antenna array into a sufficient number of grid units, and calculate the mutual influence between any grids, the calculation amount is huge and the calculation process is complicated, and it is difficult to quickly analyze the mutual coupling characteristics of MIMO antennas

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  • A fast analysis method for mutual coupling characteristics of mimo antennas
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  • A fast analysis method for mutual coupling characteristics of mimo antennas

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Embodiment 1

[0045] Example 1: Combining Figure 1-Figure 2 , a mutual coupling characteristic fast analysis method of MIMO antenna array, it is characterized in that: this fast analysis method comprises the following steps:

[0046] Step 1. Based on the field model of the unit antenna, a matrix relational expression representing the scattered field coefficient and the incident field coefficient is established.

[0047] Assuming that the equivalent incident field of element antenna 1 can be expanded according to the cylindrical wave function as:

[0048]

[0049] where E 0 is the initial electric field amplitude, is the incident field coefficient of antenna 1 to be calculated, J n (k0 ρ) represents the Bessel function, G(ρ, φ, z) is the Green’s function in the unbounded space, and (ρ, φ, z) represent the three components in the coordinate system.

[0050] The resulting scattered field according to step 1 is

[0051]

[0052] in, is the scattered field coefficient of antenna...

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Abstract

The invention belongs to the field of antenna electromagnetic analysis, and specifically relates to a method for quickly analyzing mutual coupling characteristics of MIMO antennas. The method includes: expanding the field of a unit antenna according to a vector wave function, and establishing a relational expression representing a scattering field coefficient and an incident field coefficient; using The iterative scattering algorithm determines the relationship between the scattering field coefficients of different unit antennas after iteration; the antenna units in the array are respectively stimulated, and the S parameters between different units are determined according to the iterative law of the scattering field between antennas, that is, mutual coupling Feature parameters. The invention solves the problem that the existing method cannot quickly analyze the mutual coupling characteristics of the MIMO array, and is suitable for the situation where the array antenna units are placed in parallel or have the same radiation direction, and the iterative scattering algorithm is used to analyze the mutual influence between the antennas, and the array antenna can be directly calculated The mutual coupling characteristics between them; the field of the antenna unit and the iterative mutual coupling field are calculated separately, which facilitates the modular realization of the algorithm and improves the calculation accuracy.

Description

technical field [0001] The invention belongs to the field of antenna electromagnetic analysis, in particular to a fast analysis method for MIMO antenna mutual coupling characteristics. Background technique [0002] MIMO technology is a new technology proposed to meet the high-speed and large-capacity business requirements while overcoming the multipath fading of high-speed data in wireless channels, and has been applied to existing 4G mobile communication systems. However, in the design process of the MIMO antenna system, due to the mutual coupling effect between the antennas and the lack of abundant wireless multipath channel scattering conditions, the distribution of channel characteristics is not completely independent; therefore, when calculating the channel capacity, it must be considered The spatial correlation between sub-channels, and the mutual coupling between MIMO array elements has a close relationship with the channel capacity; in addition, the mutual coupling b...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/12H04B7/0413
Inventor 雷雪朱明林刘起坤钟州安娜黄开枝孙昱杨梅樾韩乾丁瑞浩
Owner THE PLA INFORMATION ENG UNIV
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