Source stirring method of electrical modulation electromagnetic wave orbit angular momentum mode for reducing reverberation room measurement uncertainty

A technology for measuring uncertainty and orbital angular momentum, which is applied in the direction of measuring electrical variables, measuring devices, and electromagnetic field characteristics, can solve the problems of limited application range, time-consuming stirring method, and inability to obtain original data, etc., to reduce measurement uncertainty , Shorten the test time, and the effect of simple mode switching

Active Publication Date: 2019-08-02
上海莱天通信技术有限公司
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Problems solved by technology

[0005] The mechanical rotation of the stirrer and turntable takes time, and the stirring method involving mechanical rotation is very time-consuming due to the large amount of measurement data in the reverberation chamber
Frequency stirring can only post-process the data, but cannot obtain more effective raw data, so the scope of application is very limited
Antenna stirring...

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  • Source stirring method of electrical modulation electromagnetic wave orbit angular momentum mode for reducing reverberation room measurement uncertainty
  • Source stirring method of electrical modulation electromagnetic wave orbit angular momentum mode for reducing reverberation room measurement uncertainty
  • Source stirring method of electrical modulation electromagnetic wave orbit angular momentum mode for reducing reverberation room measurement uncertainty

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the examples.

[0024] The electrically adjustable vortex electromagnetic metasurface adopted in the present invention is as figure 1 As shown in (1), the electromagnetic metasurface is composed of 9×9 metasurface units closely arranged periodically, and each metasurface unit is loaded with two varactor diodes, such as figure 1 As shown in (2), the size of the electromagnetic metasurface is 30cm×30cm×1.2cm. By adjusting the bias value (0-30V DC) of the varactor diode through an external circuit, the phase characteristics of the electromagnetic wave can be adjusted, and then the mode of the orbital angular momentum of the electromagnetic wave can be controlled.

[0025] The overall test environment of the embodiment of the present invention is as figure 2 As shown, the size of the reverberation chamber is 1.50m × 1.44m × 0.92m, in which two mechanical stirrers (one horizontal and one v...

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Abstract

The invention discloses a source stirring method of an electrical modulation electromagnetic wave orbit angular momentum mode for reducing reverberation room measurement uncertainty. An electrically modulated vortex electromagnetic metasurface is deployed in a reverberation room, thus, a brand new degree of freedom is introduced; for the electromagnetic wave orbit angular momentum, various independent electromagnetic wave orbit angular momentum modes can be controlled and switched through an electrical modulation mode, independent sample number is increased effectively, the source stirring method can be used simultaneously with other stirring methods under a limited space condition, measurement uncertainty is reduced further, when the source stirring method is used simultaneously with theother stirring methods, and under a condition where total sample number is fixed, overall test time can be controlled through control of the number of work modes of the electromagnetic metasurface. The method provided by the invention can effectively reduce measurement uncertainty of the reverberation room, and has the characteristics of occupying small space, using simple modulation modes, needing short test time, being convenient to make, and being low-cost.

Description

technical field [0001] The invention belongs to the technical field of microwave reverberation chambers, and relates to a source stirring method for an electrically-regulated electromagnetic wave orbital angular momentum mode that reduces the measurement uncertainty of a reverberation chamber. Background technique [0002] The microwave reverberation chamber is a large metal cavity, which generates a spatially uniform, isotropic, and randomly polarized electromagnetic field in the working area of ​​the cavity through different stirring methods. As an emerging electromagnetic testing environment, the reverberation chamber has the characteristics of low construction cost, high testing efficiency, and good reproducibility. It has been widely used in electromagnetic compatibility testing and air interface testing. [0003] The uniform characteristics of the electromagnetic field in the reverberation chamber are presented in a statistical sense. The more effective the stirring me...

Claims

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Application Information

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IPC IPC(8): G01R29/08
CPCG01R29/0821
Inventor 陈晓明薛威施宏宇王鲁一
Owner 上海莱天通信技术有限公司
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