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Method for testing antenna gain by using GTEM cell

A technology for testing antennas and antennas, applied in directions such as electromagnetic field characteristics, can solve the problems of large measurement error, high cost, time-consuming and labor-intensive, etc., and achieve the effect of low equipment cost and simple operation.

Inactive Publication Date: 2010-09-01
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These test environments are either inevitably subject to electromagnetic interference, which makes the measurement error relatively large, or is time-consuming, labor-intensive, costly, and occupies a large area

Method used

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  • Method for testing antenna gain by using GTEM cell
  • Method for testing antenna gain by using GTEM cell
  • Method for testing antenna gain by using GTEM cell

Examples

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specific Embodiment

[0024] see you again figure 1 , figure 2 , image 3 , use the GTEM cell to test the antenna gain. The GTEM cell is pyramid-shaped, and the typical lengths are 7 meters, 4 meters and 3 meters. It is theoretically a rectangular cone coaxial transmission line model.

[0025] In the present invention, the GTEM cell is applied to the measurement of the antenna gain, and the GTEM cell is selected as the test equipment; in the test, the difference between the specific non-metallic turntable and the general turntable is that the antenna can be around the X axis at any position Rotate so that the maximum receiving direction of the antenna can be obtained.

[0026] The biggest advantage of the GTEM cell for antenna gain testing is that the test is very simple, the floor space is small, and the cost is low. Except for size requirements, this method does not have any restrictions on the antenna under test itself, and does not need to configure other standard antennas for comparison. ...

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Abstract

The invention discloses a method for testing an antenna gain by using a GTEM cell. The method comprises the following steps of: placing an antenna to be tested on a special non-metal turntable in the GTEM cell; arranging a radio frequency signal generator on the port of the GTEM cell; connecting the output end of the antenna with a frequency spectrograph through a cable; testing the receiving power of the antenna; monitoring the rotation of the turntable and data of the frequency spectrograph in real time so as to obtain a maximum value of the receiving power of the antenna; and calculating the gain of the antenna by using a formula provided by the invention. The method has the characteristics of simple operation and low cost.

Description

technical field [0001] The invention relates to the application of a GTEM cell, in particular to a method for testing antenna gain with the GTEM cell. Background technique [0002] In the test of antenna and communication transmitting equipment, the test of antenna gain is an important content. Traditional methods require the receiving antenna to be placed in free space or in a dark room, along with a standard reference antenna. These test environments are either inevitably subject to electromagnetic interference, resulting in relatively large measurement errors, or time-consuming, labor-intensive, high-cost, and large-occupied areas. [0003] Therefore, a relatively simple and cheap test equipment is needed, and it is a very suitable choice to use the GTEM cell to test the antenna gain. Compared with anechoic chambers and semi-anechoic chambers, the main advantages of using GTEM cells for antenna testing are that they can better shield external electromagnetic interferenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
Inventor 李书芳
Owner BEIJING UNIV OF POSTS & TELECOMM
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