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A method for determining the near-field phase center of antennas with complex structures

A complex structure, phase center technology, applied to the antenna radiation pattern and other directions, can solve the problems of complex antenna structure, difficult to determine, unable to meet the calculation requirements, etc.

Active Publication Date: 2016-09-14
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Description
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  • Application Information

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Problems solved by technology

However, in the transition region between the near and far fields of the antenna, when determining the analytical expression of the radiation field, it is necessary to evaluate the influence of the high-order term of the propagation distance, and some antenna structures are complex, and the analytical expression of the radiation field itself is difficult to determine, which cannot meet the requirements of the traditional phase center. In the evaluation method, the calculation requirements for the analytical expression of the radiation field of the antenna need to be obtained

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  • A method for determining the near-field phase center of antennas with complex structures
  • A method for determining the near-field phase center of antennas with complex structures
  • A method for determining the near-field phase center of antennas with complex structures

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Embodiment Construction

[0039] In order to better understand the present invention, the solution of the present invention will be further described below with reference to the accompanying drawings through specific embodiments. The protection scope of the present invention should include the entire contents of the claims, but is not limited thereto.

[0040] like figure 1 This is the main block diagram of the basic principle of the near-field phase center of the antenna with complex structure. Antenna 1 with complex structure has extrapolation boundary 2 surrounding the complex structure antenna, source point 3 located on the extrapolation boundary surrounding the antenna, phase center calculation reference plane 4, observation point 5 located on the phase center calculation reference plane, antenna port Calculate the reference plane distance 6 from the surface center to the phase center, the curvature radius 7 corresponding to the isophase surface, and the antenna phase center 8.

[0041] figure ...

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Abstract

The invention discloses a method for determining a near-field phase center of an antenna with a complex structure. The method comprises the following steps: 1) performing electromagnetic emulation modeling on the antenna with the complex structure; 2) determining the electromagnetic characteristic of the antenna with the complex structure; 3) determining a field value on a extrapolated boundary surface which encircles the antenna; 4) determining an auxiliary function of a reference observation surface of the phase center; 5) determining the curvature radius of an equiphase surface; 6) determining the near-field phase center of the antenna with the complex structure.

Description

technical field [0001] The invention relates to a method for evaluating the near-field phase center of an antenna, in particular to a method for determining the near-field phase center of an antenna with a complex structure. Background technique [0002] Due to the requirements of the on-board payload, the cross-section of the blackbody calibration source is limited, and the directivity of the calibration antenna is extremely required. The focal radius of the main lobe beam falling on the calibration source is 1 / 2 (when the periodic calibration method is used The diameter of the blackbody calibration source is about 300mm-500mm), and the distance between the calibration antenna and the blackbody calibration source is basically in the range of 200mm-700mm. The phase center will change significantly with the distance along the main lobe of the antenna and the observation angle. When measuring the emissivity of the blackbody calibration source based on the spatial method, it is...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/10
Inventor 年丰程春悦何巍翟宏杨于杰
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT