A source-stirring method for electrically tuned electromagnetic wave orbital angular momentum mode to reduce measurement uncertainty in reverberation chambers
A technology for measuring uncertainty and orbital angular momentum. It is used in the measurement of electrical variables, measuring devices, and electromagnetic field characteristics. It can solve problems such as limited application scope, time-consuming stirring methods, and inability to obtain original data, so as to reduce measurement uncertainty. , shorten the test time, the effect of simple mode switching
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[0023] The present invention will be further described in detail below in conjunction with the embodiments.
[0024] The electrically adjustable vortex electromagnetic super surface used in the present invention is such as figure 1 As shown in (1), the electromagnetic metasurface is composed of 9×9 metasurface units arranged closely and periodically, and each metasurface unit is loaded with two varactor diodes, such as figure 1 As shown in (2), the size of the electromagnetic supersurface 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 electromagnetic wave orbital angular momentum 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 agitators (one horizontal and one vertica...
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