摘要
对生物电磁效应相关实验工作的回顾表明,当前实验装置主要为窄频电磁辐射装置和脉冲电磁辐射装置,通用性不足。随着无线系统的发展,电磁环境频谱将横跨数千赫兹到毫米波,且为多频段复合电磁场,其中包含超宽带矢量调制的电磁场,有一些具有脉冲时隙特征,显然生物电磁效应实验需要模拟、复现这样的电磁环境,而传统的电磁辐射实验装置具有显著的局限性。为此提出基于超宽带同轴锥腔体的新实验装置方案,理论和实验测量都表明,新实验装置单一腔体就可以具备直流至40 GHz/67 GHz毫米波的超宽带电磁场生成能力,在相同的馈电功率条件下其激发的电场强度是天线的2倍以上,故而具备了超宽带、高场强两个特征,且可实现多频段复合电磁辐射,能够满足生物电磁效应实验中复杂电磁环境复现的需要。
It is shown by the review of the related experimental work of biological electromagnetic effects that the current experimental devices are mainly narrow-band and pulse electromagnetic radiation devices with insufficient versatility.With the development of wireless systems,the electromagnetic environment spectrum will span from thousands of hertz to millimeter waves and is multi-band composite electromagnetic field,including the ultra-wide band vector-modulated electromagnetic fields.Some of them have pulse slot characteristics.It is obvious such electromagnetic environment as simulation and reproduction for the biological electromagnetic effect needs to be tested.However,the traditional electromagnetic radiation experimental device has remarkable limitation.Therefore,the scheme of new experimental device based on ultra-wideband coaxial cone cavity is proposed.It is shown by both theoretical and experimental measurements that the only the single cavity of the new experimental device possesses the ability to generate ultra-wideband electromagnetic fields from DC to 40 GHz/67 GHz.Under the same feed power condition,the strength of the electric field excited by it is more than twice that of the antenna and thus possesses such two characteristics as ultra-wideband and high field strength and,furthermore,can achieve multi-band composite electromagnetic radiation and can meet the needs of complex electromagnetic environment reproduction in the experiment of biological electromagnetic effect.
作者
周峰
张大元
纪锐
袁修华
孙薪棋
ZHOU Feng;ZHANG Dayuan;JI Rui;YUAN Xiuhua;SUN Xinqi(China Academy of Information and Communication Technology,Beijing 100191,China)
出处
《高压电器》
CAS
CSCD
北大核心
2021年第4期120-124,141,共6页
High Voltage Apparatus
基金
国家重点研发计划资助(2018YFF0212104、2017YFF0204903、2016YFF0200104)
中国信息通信研究院基础研究课题(毫米波电磁传播特性及MIMO的毫米波特性)。
关键词
同轴腔体
超宽带
毫米波
电磁辐射
生物电磁效应
coaxial cavity
ultra-wideband
millimeter wave
electromagnetic radiation
biological electromagnetic effects
