摘要
为优化电流环型无线短传天线的设计,对天线性能受磁芯的影响进行了分析。采用COMSOL有限元软件实现了对带磁芯电流环型天线的建模仿真。通过对不同算例的仿真结果进行分析,得到了磁芯对天线的影响规律。天线信号随电流源频率和磁芯磁导率的增大而增大,但磁导率对信号的增大作用存在饱和现象,饱和磁导率约为1000;磁芯对发射和接收天线信号的影响是独立的,且影响程度与地层电阻率无关;增大线圈半径、磁芯宽度,减小线圈缠绕宽度,天线信号增大明显,增加磁芯厚度,信号也有增大趋势,但变化幅度很小。依据此影响规律,对线圈与磁芯的缠绕形式以及结构尺寸进行优化设计,选取合适的磁芯材料,能有效提升电流环型无线短传天线的通讯性能。
In order to optimize the design of the current loop wireless short hop antenna,the effect of the magnetic core on antenna performance was analyzed.The COMSOL finite element software is used to model and simulate the current loop antenna with magnetic core.Through the analysis of the simulation results of different examples,the influence of the magnetic core on the antenna is obtained.The results are as follows:The antenna signal increases with the increase of the current frequency and the permeability of the core,but the saturation phenomenon exists in the effect of the permeability on the signal enhancement,and the saturation permeability is about 1000.The influence of the magnetic core on the transmitter and receiver antenna signal is independent,and the influence degree is independent of the formation resistivity.When the antenna radius and the core width are increased and the antenna winding width is decreased,the antenna signal increases obviously,and when the core thickness increases,the signal also tends to increase,but the range of change is very small.According to the results obtained in this paper,through optimizing the winding form and structure size of the coils and magnetic core,and choosing suitable magnetic core material,the communication performance of current loop wireless short hop antenna can be effectively improved.
作者
宋殿光
岳步江
狄帮让
张龙
贺鸣
SONG Dianguang;YUE Bujiang;DI Bangrang;ZHANG Long;HE Ming(College of Geophysics in China University of Petroleum(Beijing),Beijing 102249,China;Aerospace Science&Industry Inertial Technology Co.,Ltd,Beijing 100074,China)
出处
《石油管材与仪器》
2019年第6期49-52,共4页
Petroleum Tubular Goods & Instruments
关键词
近钻头测量
无线短传
电流环型天线
磁芯
COMSOL有限元软件
at-bit measurement
wireless short hop
current loop antenna
magnetic core
COMSOL finite element software
