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Electromagnetic safety analysis method for near field of plane phased control array antenna

An array antenna and safety analysis technology, applied in the direction of the antenna radiation pattern, can solve the electromagnetic safety problems of equipment and other problems, and achieve the effects of good adaptability, high accuracy and high efficiency

Active Publication Date: 2013-02-13
CHINA SHIP DEV & DESIGN CENT
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AI Technical Summary

Problems solved by technology

[0002] On the system platform where the phased array radar antenna is installed, the near-field electromagnetic environment radiated by the phased array antenna (usually measured by electric field strength Description) will bring potential electromagnetic safety problems to personnel and equipment on the platform

Method used

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  • Electromagnetic safety analysis method for near field of plane phased control array antenna
  • Electromagnetic safety analysis method for near field of plane phased control array antenna
  • Electromagnetic safety analysis method for near field of plane phased control array antenna

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Embodiment Construction

[0053] figure 1 It is a flowchart of an embodiment of the present invention, which includes the following steps:

[0054] 1) Solve the radiation field of the active element in the array

[0055] The radiation of an element antenna is only affected by several element antennas located near it, so a small array can be used to solve the radiation field of the active element antenna in the array.

[0056] Take a small array with a range of ±2λ centered on a certain array element (the length and width of the small array are both 4λ, and the spacing of the array elements is usually about λ / 2, so the small array is approximately 9×9 array). The radiation field in the array can be equivalent to the radiation field of the element antenna in the infinite array, and the radiation lobe of the small array is equivalent to the radiation lobe of the element in the infinite array, which can be equivalent to the active element antenna in the actual array. Lobes.

[0057] For a 9×9 array of small ante...

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Abstract

The invention provides an electromagnetic safety analysis method for a near field of a plane phased control array antenna on a system platform, which analyses electromagnetic safety of personnel and equipment close to the plane phased control array antenna on the system platform by calculating the near field electromagnetic environment of phase control array antenna radiation. The near field of the plane phased control array antenna is obtained by overlaying a radiation field of each active (motivation) array element in a array; enabling a near field area of the plane array antenna to be a far field area relative to the array elements; obtaining the near field of the array antenna after overlaying and rectifying the radiation far fields and solving the radiation far field of each array element in the array; and diagnosing the electromagnetic safety of the personnel and the equipment which are located at the near field of the phase control array antenna on the system platform by comparing near field electric field data with an electric field limit value specified by a electromagnetic safety standard. Each step of the method is based on strict principles, and the strictness of the principles ensures accuracy of calculation results, so that the electromagnetic safety of the personnel and the equipment located in the antenna near field area can be accurately analyzed.

Description

Technical field [0001] The invention belongs to the technical field of antennas and electromagnetic compatibility, and particularly relates to a near-field electromagnetic safety analysis method of a planar array antenna on a system platform (such as a ship, etc.). Background technique [0002] On the system platform where the phased array radar antenna is installed, the near-field electromagnetic environment radiated by the phased array antenna (usually using electric field strength Description) will bring potential electromagnetic safety problems to personnel and equipment on the platform. Some electromagnetic safety standards stipulate the safety limit of the electromagnetic safety electric field strength of personnel and different types of equipment, and it can be regarded as safe if it is less than the limit. The near-field electric field intensity radiated by a phased array antenna can be obtained through experimental tests, and can also be obtained by establishing a calcu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/10
Inventor 王春吴楠宋东安陈亮谢大刚
Owner CHINA SHIP DEV & DESIGN CENT
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