摘要
为了研究PCB(printedcircuitboard)平面电感的电磁辐射问题,基于天线理论把平面电感线圈中的每一圈看作一个环形天线,估算了其远场辐射功率,说明其电磁辐射非常小,可以忽略不计.平面电感的近场耦合问题通过一个无源带通滤波电路加以讨论.逐点测出电路中某一个电感附近的辐射强度,并用MATLAB绘出三维辐射强度图,说明平面电感的近场辐射只发生在电感周围很近的区域,与线路中的导线相比对电路其他部分没有太大影响.
In order to study the electromagnetic radiations of a PCB (printed circuit board) planar inductor, each turn in the spiral windings of the inductor is taken as a loop antenna based on the antenna theory. Its far-field radiation power is estimated and found to be negligible. Its near--field coupling is discussed based on a passive band-pass filter contained PCB planar inductors. The radiation intensity of one of the inductors in the circuit is measured one by one point and the 3-D plot of it is given by MATLAB. The plot shows that the near-field coupling is only occurring in the area where the inductor is located, which hardly affect the rest of the circuit comparing with the track in the same PCB.
出处
《电子器件》
CAS
2007年第1期183-185,共3页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(60372007)
关键词
电磁辐射
PCB平面电感
小环天线
辐射强度
磁耦合
electromagnetic radiation
PCB planar inductor
small loop antenna
electromagnetic radiation
magnetic coupling