Application Of Metasurface Holographic Antenna In Radio Reverberation Chamber

As a new type of EMC measurement site,radio reverberation chamber has been widely used.In this paper,holographic antenna is used to replace transmitting antenna and agitator in reverberation chamber.Feasibility study is carried out to reduce the lowest available frequency of reverberation chamber,increase test space and improve agitation performance.The main research work is as follows:1.The holographic antenna excited by the horn antenna is applied to the reverberation chamber.The simulation results show that the field uniformity of the reverberation chamber meets the requirements of IEC6000-4-21.A holographic antenna with a center frequency of 1.3 GHz and a holographic antenna with a center frequency of 2 GHz are designed.The reverberation performance of the integrated holographic antenna is discussed.The simulation results show that it is feasible to widen the frequency range,but the stirring ability is reduced.2.The designed holographic antenna excited by composite monopole antenna is applied to reverberation chamber,and the simulation models of reverberation chamber of various holographic antennas are established.The field uniformity,scattering cross-section area and quality factors are simulated and calculated.Compared with the mechanical stirred reverberation chamber model and the source stirred reverberation chamber model of the same size,it is proved that under the standard of IEC 6000-4-21,there is a larger model.Testing space and better mixing effect.The effects of the design area of the holographic antenna and the multi-beam holographic antenna on the field uniformity,stirring capacity and energy storage capacity of the reverberation chamber are also studied.3.The mechanism of using holographic antenna in reverberation chamber to realize stirring function is studied.The simulation results show that the holographic antenna has two stirring effects.Specifically speaking,on the one hand,it can achieve the effect of source stirring by changing the radiation of holographic antenna,on the other hand,it can achieve the effect of mechanical stirring by changing the relative boundary conditions of reverberation chamber.