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The method of measuring the omnidirectional radiation total power of antenna with gtem cell

An omnidirectional radiation and antenna test technology, applied in the direction of electromagnetic field characteristics, can solve the problems of complex operation and large test error, and achieve the effect of simple operation and small test error

Inactive Publication Date: 2011-12-14
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

[0006] The operation is more complicated and the test error is large

Method used

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  • The method of measuring the omnidirectional radiation total power of antenna with gtem cell
  • The method of measuring the omnidirectional radiation total power of antenna with gtem cell
  • The method of measuring the omnidirectional radiation total power of antenna with gtem cell

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specific Embodiment

[0054] see you again figure 1 , figure 2 , image 3 , use the GTEM cell to test the omnidirectional radiation total power of the antenna. The GTEM cell is in the shape of a pyramid, and the typical length is 7 meters, 4 meters, and 3 meters. It is theoretically a rectangular cone coaxial transmission line model.

[0055] In the present invention, the GTEM cell is applied to the test of the total power of antenna radiation, and a cheap GTEM cell is selected as the test equipment; two simple and practical inversion methods, the linear method and the TOP method, are selected in the test; the GTEM is inserted into the antenna In the case of a large impedance change after the cell, a real-time test of the reflected power with a circulator was used in the test to compensate the output power of the GTEM cell in real time, which greatly improved the accuracy of the test.

[0056] The linear method and the TOP method are described in detail as follows:

[0057] 1. Linear method

...

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Abstract

The invention discloses a method for testing the omnidirectional radiation total power of an antenna with a GTEM cell. First, the antenna of the device to be tested is placed on a three-dimensional non-metallic turntable in the GTEM cell, and the axes of the local coordinates of the antenna of the device to be tested are determined in relation to the GTEM cell. Coordinate the corresponding relationship of each axis, and return the reflected power of the antenna through the circulator, use the reflected power of the antenna to compensate the output power of the GTEM cell port, and then use the linear method or TOP method to calculate the total radiation power of the antenna of the device under test in free space. The operation is simple and the accuracy of the test is improved.

Description

technical field [0001] The invention relates to the application of a GTEM cell, in particular to a method for testing the omnidirectional radiation total power (TRP) of an antenna with the GTEM cell. Background technique [0002] In the test of antenna and communication transmitting equipment, the total power test of omnidirectional radiation in free space is an important content. For this kind of test, the traditional method needs to place the receiving antenna in a free space or a dark room, and then take various azimuths on a spherical surface surrounding the antenna for testing. This method is time-consuming, laborious, costly, and occupies a large area. [0003] In recent years, with the frequent holding of large-scale social activities such as large-scale sports games, the demand for on-site and rapid testing of the total radiated power of various wireless devices is becoming more and more urgent. Most of these tests are temporary and on-site, which requires the test ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08
Inventor 李书芳李吉洪卫军刘红杰尹斯星姜雪松易敏邓力
Owner BEIJING UNIV OF POSTS & TELECOMM
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