Research Of A Broadband Electromagnetic Radiation Experimental Device

With the development of economy and the coming of information age,electronic devices and electrical devices are more and more used in various fields of the national economy.They not only create a great material civilization to human being,but also bring people into an environment full of electromagnetic exposure.However,the current research mainly focused on the power frequency and mobile communication frequency band,the research of broadband electromagnetic radiation effects on cell mechanism is rarely seen.With the broadening band with of spectrum analyzer,previous research on DC-3 GHz band has been unable to meet the experimental requirements because of its big radiation device and lower automation performance.This paper presents a DC-6GHz broadband electromagnetic radiation experimental device based on the theoretical research,simulation design and actual processing.As the main device of the electromagnetic radiation experiment,it is required that the electromagnetic radiation cavity has good transmission performance in the wide frequency band,that is,its return loss should be less than-10dB in the wide frequency band.Considering the processing factors,the radiation cavity is modified and optimized so that the simulation and actual processing are combined.Coaxial discontinuity theory and impedance matching are adopted as the theoretical support for the broadband electromagnetic radiation experimental device,the coaxial model and its discontinuity is analyzed by FDTD method.Using CST software as the simulation software to model and optimize the design and the portion of the electromagnetic radiation cavity where coaxial discontinuity exists is compensated.Also we choose a proper radio frequency connector.Finally,we design a broadband electromagnetic radiation experimental device based on the taper coaxial line.The simulated results and measured results have good consistency,return loss can be less than 10 dB within 0 to 6GHz.