电磁混响室不同工作状态下有效工作区场强  

Field Strength of Effective Working Area of Electromagnetic Reverberation Chamber under Different Working Conditions

作　　者：薛腾 蒋思奥 王长振 XUE Teng;JIANG Si-ao;WANG Chang-zhen(Institute of Radiation Medicine,Academy of Military Medicine,Beijing 100850,China)

机构地区：[1]军事医学研究院辐射医学研究所,北京100850

出　　处：《科学技术与工程》2023年第15期6361-6367,共7页Science Technology and Engineering

基　　金：军委装备综合研究项目(JK2022B041400)。

摘　　要：电磁混响室(reverberation chamber, RC)在不同工作状态下,找到其电平值与场强的对应参考值,探究有效工作区域中场强均一性,并最终明确有效工作区域中场强较为稳定的区域,为电磁辐射生物效应和防护研究提供参考。分别在900、1 800、2 650 MHz三种频率下,用电磁辐射检测仪对RC有效工作区域内324个场强测试点进行监测,并采用R语言和相关统计学软件进行分析。结果表明:在固定频率900 MHz、电平值为-25 dBm时,有效工作区域中三个高度的场强值和变异系数均无统计学差异;在固定频率1 800 MHz、电平值为-21 dBm时,场强在高度一与高度三、高度二与高度三之间统计学差异显著,变异系数在三个高度之间无统计学差异;在固定频率2 650 MHz、电平值为-19 dBm时,场强在高度一与高度二、高度一与高度三之间统计学差异显著,变异系数在三个高度之间无统计学差异。可见本研究提供了900、1 800、2 650 MHz三个频率下相应电平值对应的场强,为相关实验的开展提供参考;RC内有效工作区域单点场强随时间变化稳定性良好,而不同点的场强存在一定的空间不稳定性;有效工作区域中场强较为稳定的区域为高度一区域。The electromagnetic reverberation chamber(reverberation chamber,RC)finds the corresponding reference value of the level value and the field strength under different working conditions,explores the field strength uniformity in the effective working area,and finally identifies the area where the field strength is relatively stable in the effective working areato provide a reference for the study of electromagnetic radiation biological effects and protection.At the three frequencies of 900 MHz,1800 MHz and 2650 MHz,the electromagnetic radiation detector was used to monitor 324 field strength test points in the effective working area of RC,and the R language and related statistical software were used for analysis.The result shows that when the fixed frequency is 900 MHz and the level value is-25 dBm,there is no statistical difference in the field strength and coefficient of variation of the three heights in the effective working area.When the fixed frequency is 1800 MHz and the level value is-21 dBm,the field strength is statistically significant between heights 1 and 3,height 2 and height 3,and the coefficient of variation has no statistical difference between the three heights.When the fixed frequency is 2650 MHz and the level value is-19 dBm,the field strength is statistically significant between height 1 and height 2,height 1 and height 3,and the coefficient of variation has no statistical difference between the three heights.It can be seen that the field strength corresponding to the corresponding level value at the three frequencies of 900 MHz,1800 MHz and 2650 MHz is provided,which provides a reference for the development of related experiments;the field strength at a single point in the effective working area of the RC has good stability with time,while the field strength at different points has a certain spatial instability.The area where the field strength is relatively stable in the effective working area is the height-one area.

关 键 词：电磁混响室 电磁辐射 场强 场均匀性 手机辐射生物效应 

分 类 号：Q64[生物学—生物物理学]