Spherical multi-probe antenna test data processing method

A processing method and technology for testing data, applied in directions such as antenna radiation patterns, and can solve problems such as poor practicability

Inactive Publication Date: 2016-03-30
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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Problems solved by technology

[0003] In order to overcome the shortcomings of poor practicability of existing methods,...

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  • Spherical multi-probe antenna test data processing method
  • Spherical multi-probe antenna test data processing method
  • Spherical multi-probe antenna test data processing method

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Embodiment Construction

[0020] The specific steps of the spherical multi-probe antenna test data processing method of the present invention are as follows:

[0021] Choose a pyramidal horn antenna with a diameter of 52.07cm, and the test frequency f=2.4GHz. The specific steps are as follows:

[0022] 1) Use the electromagnetic simulation software HFSS to model and simulate the pyramidal horn antenna, and use a probe with known characteristics to treat it as θ polarization and When polarized, at a distance of r from the antenna to be tested 0 The near-field data of the antenna is obtained by measuring on the space spherical surface of =10λ and Where λ is the working wavelength of the antenna under test, r 0 =10λ=1.25m, θ is the pitch angle of the probe relative to the antenna to be tested, is the azimuth angle of the probe relative to the antenna under test.

[0023] 2) Substitute the near-field data obtained in 1) into the integral term and , and use the fast Fourier transform FFT to c...

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Abstract

The invention discloses a spherical multi-probe antenna test data processing method in order to solve the technical problem that the existing method is of poor practicability. According to the technical scheme, a field established in a space by a to-be-tested antenna is expanded into the sum of spherical wave functions, a weighted function in the expansion contains the information of a far-field directional pattern, the weighted function can be worked out according to near-field sampling data and the far-field directional pattern is thus worked out, multi-probe spherical near-field scanning is adopted in near-field sampling, the to-be-tested antenna azimuthally rotates around the antenna center, probes carry out sampling at a distance of a few wavelengths from the antenna aperture, and therefore, the far-field coverage angle provided by spherical near-field measurement is within the range of +/-180 degrees for azimuth angle and +/-90 degrees for pitch angle, and all radiation information of the to-be-tested antenna can be obtained. Thus, the method is applicable to measurement of all types of beam antennas. The number of times of program looping is reduced, the speed of program running is improved, and the time for antenna test data processing is shortened.

Description

technical field [0001] The invention relates to a method for processing antenna test data, in particular to a method for processing spherical multi-probe antenna test data. Background technique [0002] The document "Application Publication No. CN104391183A Chinese Invention Patent" discloses a fast calculation method for the far-field field characteristics of near-field measurement antennas. This algorithm expands the field established by the antenna to be measured in space into the sum of plane wave functions. In the expansion The weighting function contains the information of the far-field pattern, and the weighting function is calculated according to the near-field sampling data, thereby calculating the far-field pattern. However, when using a planar near-field measurement antenna, the antenna to be tested does not move, and the test probe collects the amplitude and phase values ​​of the electric field at a distance less than half a wavelength on the horizontal or vertic...

Claims

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Application Information

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IPC IPC(8): G01R29/10
CPCG01R29/10
Inventor 李南京郭丽芳李元新胡楚锋李瑛陈卫军
Owner NORTHWESTERN POLYTECHNICAL UNIV
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