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Anti-interference antenna pattern measurement method based on mixed shielding chamber

A technology of antenna pattern and measurement method, applied in antenna radiation pattern, measuring device, measuring electrical variables, etc., can solve problems such as defects, inability to accurately calculate the correlation coefficient of the antenna to be tested, and incomplete spherical scattering signals

Active Publication Date: 2021-12-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, in a non-ideal darkroom test environment, when the performance of the indoor absorbing material is poor or the absorbing structure is not installed in some corners, and the spherical near-field test still has the problem of spherical reflection path interference, it will cause the antenna radiation pattern The interference caused by the multi-reflection paths in the chamber appears on the measurement results, and damages the characteristic parameters such as the main lobe, side lobe and directivity of the pattern. At this time, the traditional test area field compensation method cannot compensate well. In addition, in a non-ideal reverberation chamber, if the antenna to be tested on the turntable fails to rotate according to the predetermined angle or the chamber is not stirred uniformly, it will cause incomplete or defective spherical scattering signals, and then The correlation coefficient of the antenna under test cannot be accurately calculated from the S parameters obtained by the vector network analyzer. Therefore, the method of reconstructing the correlation coefficient can only obtain the antenna pattern under test containing reflection path interference, but cannot reversely reconstruct it. Construct a complete antenna far-field radiation characteristics

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  • Anti-interference antenna pattern measurement method based on mixed shielding chamber
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  • Anti-interference antenna pattern measurement method based on mixed shielding chamber

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0050] The overall test environment of the embodiment of the present invention is as figure 1 As shown, the mixing shielding chamber is equipped with two mechanical stirrers 101, 102 and a turntable 103, which can be rotated so that the antenna mounted on the turntable can rotate along X, Y and Z directions. Establish a three-dimensional rectangular coordinate system with the antenna itself. When the Z-axis of the antenna is placed vertically on the turntable and the turntable is turned, the antenna can complete the effect of rotating around the Z-axis. Similarly, when the Y-axis and X-axis of the antenna are placed on the turntable perpendicular to the turntable and the turntable is turned, the antenna Rotation effects around the Y and X axes can be achieved. Meanwhile, in the test environment, the load absorber 104, the antenna to be tested 105 and the cal...

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Abstract

The invention discloses an anti-interference antenna pattern measurement method based on a mixed shielding chamber. The method comprises the steps of: selecting two antennas, namely a to-be-measured antenna and a calibration antenna, measuring a radiation pattern of the calibration antenna in a standard darkroom environment, and solving a transmission coefficient of the calibration antenna; placing the to-be-measured antenna on an indoor rotary table in a mixed shielding room environment at first, and controlling the to-be-measured antenna to rotate to obtain a rotation matrix of the to-be-measured antenna; placing the calibration antenna on a rotary table to be rotated, so as to obtain a rotation matrix of the calibration antenna; calculating a correlation coefficient matrix of the to-be-measured antenna and the calibration antenna, and rotating directional diagrams and spherical wave coefficient matrixes of the to-be-measured antenna and the calibration antenna at different turntable positions; and reconstructing a directional diagram of the to-be-measured antenna by using the spherical wave coefficient matrix and the correlation coefficient matrix, and compensating the directional diagram of the to-be-measured antenna by using the calibration antenna transmission coefficient to complete reconstruction and compensation work of the to-be-measured antenna. According to the anti-interference antenna pattern measurement method, the radiation pattern of the to-be-measured antenna in the hybrid test environment is improved.

Description

technical field [0001] The invention belongs to the technical field of microwave measurement, and in particular relates to a method for measuring an anti-jamming antenna pattern based on a hybrid shielding room. Background technique [0002] The hybrid shielded room forms a static, anisotropic and multipath environment by placing loads or absorbers in the room, and can simulate a specific spatial channel model. In wireless communication testing, each newly proposed application model needs to be tested in a directional channel environment. For this, the hybrid shielding room provides the necessary test basis and standardized methods, and the hybrid shielding room is due to its own construction cost. , operability and system flexibility make it have broad application prospect and potential in the wireless communication industry. Related microwave measurement studies have demonstrated the feasibility of hybrid shielded rooms in creating sample space channel environments. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10G01R29/08
CPCG01R29/105G01R29/0892
Inventor 陈晓明郑俊浩刘晓波李福荣
Owner XI AN JIAOTONG UNIV
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