A method for accurately predicting near-field electromagnetic compatibility of array antennas

An array antenna, near-field electromagnetic technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems affecting electromagnetic compatibility, electromagnetic interference, etc.

Active Publication Date: 2018-12-07
CHINA SHIP DEV & DESIGN CENT
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Problems solved by technology

When multiple array antennas are installed on a ship, due to the relatively short distance, there will be near-field electromagnetic coup...

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  • A method for accurately predicting near-field electromagnetic compatibility of array antennas
  • A method for accurately predicting near-field electromagnetic compatibility of array antennas
  • A method for accurately predicting near-field electromagnetic compatibility of array antennas

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Embodiment Construction

[0082] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0083] refer to Figure 1 ~ Figure 2 As shown, the method is used to calculate the isolation between two planar array antennas on a typical ship structure.

[0084] figure 1 are two planar array antennas distributed on the ship structure, such as figure 2 As shown, the element antennas of the two array antennas are all printed vibrator antennas, the number of elements N and N' are both 3000, the working frequency is 4GHz, the element spacing is half a wavelength, and the element antennas are arranged in a rectangle.

[0085] In the embodiment of the present invention, the variation of the isolation between the antennas of the two arrays with the azimuth angle of the transmitting array is calculated by the aforementioned method and compared with the actual measurement. image 3 The variation of the isolation between the two array antennas w...

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Abstract

A method for accurately predicting near-field electromagnetic compatibility of array antennas comprises the following steps: (1) according to mutual impedance matrix, solving array element coupling and superposition between two planar array antennas; (2) calculating the port excitation voltage of the transmitting array antenna according to the transmitting power of the transmitting array antenna,and calculating the port excitation voltage of the interfered array antenna according to the response current of the port of the interfered array antenna and the internal resistance of the interferedarray antenna; (3) according to the surface current and port current of the antenna array, calculating the impedance of the two antennas array, and finally predicting the isolation between the two antennas array. The method accurately predicts coupling and interference between array antennas, and is especially suitable for accurate prediction of electromagnetic compatibility between planar array antennas on ships. Compared with the conventional uniform diffraction theory, the theory of the invention remarkably improves prediction accuracy of final isolation result.

Description

technical field [0001] The invention belongs to the technical field of ship electromagnetic compatibility, and in particular relates to an accurate prediction method for near-field electromagnetic compatibility of array antennas, which solves the problem of accurate prediction of isolation between array antennas on a large platform. Background technique [0002] Array antennas (planar array antennas) are more and more widely used in engineering. Various array antennas can be installed on system platforms such as ships. When multiple array antennas are installed on a ship, due to the relatively short distance, there will be near-field electromagnetic coupling between different antennas, and the result of coupling may cause electromagnetic interference, which affects electromagnetic compatibility. On the ship platform, in order to achieve the optimal layout, it is necessary to accurately predict the electromagnetic compatibility between the antennas facing each other. Conte...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 徐青方重华陈亮刘其凤王春陶理
Owner CHINA SHIP DEV & DESIGN CENT
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