Mixing stirring device of mechanical stirring and source stirring of electromagnetic reverberation chamber and method

Abstract

The invention provides a mixing stirring device of mechanical stirring and source stirring of an electromagnetic reverberation chamber. The mixing stirring device comprises the electromagnetic reverberation chamber and further comprises a mechanical stirring assembly and a source stirring assembly, wherein the mechanical stirring assembly and the source stirring assembly are arranged on the side wall of the electromagnetic reverberation chamber. The mechanical stirring assembly comprises a first motor and a mechanical stirrer connected with the first motor; the source stirring assembly comprises a second motor, a rotary shaft connected with the second motor and a transmitting antenna disposed on the rotary shaft. By means of combination of a mechanical stirring device, a source stirring device and a method, change of electromagnetic field distribution in the reverberation chamber depends on more variable changes which include changes of the length, the width and the height of an equivalent reverberation chamber and changes of the position of an excitation current source or/and orthogonal coordinate components of current density, and therefore more choices are provided for further improving field uniformity of a testing area in the reverberation chamber so that performance of the reverberation chamber is more likely to be improved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility testing, and relates to a mixing and stirring device and method for mechanical stirring and source stirring in an electromagnetic reverberation chamber. Background technique [0002] The existing electromagnetic reverberation chambers mainly include mechanical stirring reverberation chambers, source stirring reverberation chambers and other types. The stirring methods of various types of reverberation chambers are different, but the purpose is the same. They all change the electromagnetic field distribution in the reverberation chamber to achieve Statistical homogeneity of the electromagnetic field in the test area of ​​the reverberation chamber; [0003] The mechanical stirring reverberation chamber is equipped with a mechanical stirrer and a transmitting antenna. The transmitting antenna is fixed during operation, and the state of the stirrer changes many times, which is eq...

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Problems solved by technology

[0005] The above stirring methods each rely on a "single" variable change to change the electromagnetic field distribution in the reverberation chamber, so the statistical uniformity effect of the field that can be achieved is limited;

[0006] The literature "Analysis of Improving Field Uniformity in Reverberation Chamber Using Multi-antenna Source Stirring" studies the improvement of field uniformity in the test area of ​​the reverberation chamber brought about by the mixing and stirring method based on simulation, but its method of randomly setting multiple transmitting antennas is not suitable for Engineering realization; the document "Theoretical Analysis and Experimental Research of Electromagnetic Compatibility Reverberation Chamber" has proved through experiments that the mixing and stirring method can significantly improve the field uniformity of the test area in the reverberation chamber at low frequencies, but the mobile transmitting antenna used in it The method to multiple locations is also not suitable for engineering realization; therefore, exploring engineering feasible mixing methods has important application value

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