An Eccentricity Correction Method Applied to Automotive Antenna Performance Test
A technology for eccentricity correction and automotive antennas, applied in antenna radiation patterns, measuring devices, electromagnetic field characteristics, etc., can solve problems such as difficult vehicle movement, low reliability, and inaccurate test results, so as to facilitate the testing process and solve antenna performance The effect of directional bias
Active Publication Date: 2021-12-03
中汽研软件测评(天津)有限公司 +1
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Problems solved by technology
However, when conducting antenna tests on vehicles, it is difficult to ensure that the antenna under test is placed at the center of the measurement system due to the non-unique position of the vehicle antenna and the difficulty in moving the vehicle, resulting in inaccurate and unreliable test results in vehicle antenna performance tests. Inferior situation
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[0033] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0034] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0035] like figure 1 The vehicle-mounted antenna test layout is shown. The vehicle is placed on the turntable of the test system to ensure that the center of the vehicle coincides with the center of the measurement system, and then the vehicle-mounted antenna is tested with the measuring antenna on the circular bridge arm to obtain the electric field strength and radiated power at various angles. and other parameters, figure 1 In the test, the vehicle under test is placed on the turntable; the turntable can carry the vehicle for 360° rotation; the measuring antenna is distributed on the circular bridge arm.
[0036] like figure 2 Establish a rectangular coordinate system, the X, Y, a...
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The invention provides an eccentric correction method applied to the performance test of automobile antennas. Firstly, the spatial attenuation is corrected, and the distance between each measuring antenna and the measured antenna is calculated according to the position of the measured antenna, and the distance between each measuring antenna and the measured antenna is calculated according to the electromagnetic wave space attenuation formula and the measured The theoretical attenuation value when the antenna is located in the center of the test system is compared to obtain the spatial attenuation correction value, and then the spatial attenuation correction value is compensated and corrected for the electromagnetic field parameters obtained by each measurement antenna to obtain the measurement result when the antenna under test is located in the measurement center. Secondly, the angle of the measurement antenna is corrected. The measurement angle of the measurement antenna is relative to the measurement center. When the measured antenna deviates from the measurement center, the actual measurement result of the measurement antenna is the electromagnetic wave parameter at the angle of the measured antenna relative to the measurement antenna. Rather than relative to the center of the test system, it is necessary to calculate the angle value relative to each measurement antenna according to the position of the antenna under test as the actual measurement angle of each measurement antenna, and combine the corrected measurement parameters to obtain the antenna performance test in three-dimensional space result.
Description
technical field [0001] The invention belongs to the field of antenna testing, in particular to an eccentricity correction method applied to the performance testing of automobile antennas. Background technique [0002] With the continuous advancement of automobile intelligence and networking, the information interaction of vehicles is becoming more and more frequent. Antennas are an essential interface for wireless information interaction, and their performance requirements directly affect the safety and reliability of intelligent networking functions. With the realization and application of a series of intelligent systems such as satellite navigation system, keyless entry system, 4G communication, 5G communication, automatic driving system, automatic emergency braking and lane keeping assist system, more and more antenna equipment and communication devices are integrated in Intelligent networked vehicles, and because the antennas of each system have different working purpose...
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IPC IPC(8): G01R29/10G01R29/08
CPCG01R29/0871G01R29/10
Inventor 姜国凯孙子杰丁一夫张旭范岩蒋莉柳海明张悦
Owner 中汽研软件测评(天津)有限公司
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