面向无线传能的磁耦合通信射频链路解耦设计  

Decoupling Design of Magnetic Coupling Communication RF Link for Wireless Power Transfer System

作　　者：谢孟[1] 向乾尹 魏清新[1] 邓红梅 杜娟 马红波[2] XIE Meng;XIANG Qianyin;WEI Qingxin;DENG Hongmei;DU Juan;MA Hongbo(Beijing Electro-mechanical Engineering Research Institute,Beijing 100074,China;School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]北京机电工程研究所,北京100074 [2]西南交通大学信息科学与技术学院,四川成都611756

出　　处：《无线电工程》2024年第1期216-222,共7页Radio Engineering

基　　金：国家自然科学基金面上项目(61771408);四川省自然科学基金面上项目(2022NSFSC0566)。

摘　　要：针对磁耦合无线能量数据协同传输中传能链路与通信链路的解耦需求,在采用DD型通信线圈与传能线圈实现空域解耦的基础上,开展了滤波网络与线圈的协同设计,提升了通信链路通带阻抗匹配特性和带外抑制能力,并进一步引入带阻滤波网络,增强了与传能线圈的频域解耦。在耦合距离为30 mm时,搭建了与167 kHz无线传能天线共口径的磁耦合通信天线与滤波馈电网络硬件,在中心频率14.8 MHz实现了4 MHz的-3 dB通带带宽,该解耦天线系统相比DD线圈天线对传能信号提高了85 dB的抑制能力。To meet the decoupling requirements of the power transmission link and communication link in the wireless power and data simultaneous transmission system,based on the spatial decoupling of DD communication coil and power transmission coil,the integrated design of filtering feeding network and coil antenna is carried out,which improves the passband impedance matching characteristics and out of band suppression ability of the communication link,and further introduces the bandstop filter network to enhance the frequency domain decoupling with power transmission coil.When the coupling distance is 30 mm,the hardware of magnetic coupling communication filtering feeding antenna with the same aperture as 167 kHz wireless power transmission coil antenna is built,and the-3 dB passband bandwidth of 4 MHz is realized at the center frequency of 14.8 MHz.Compared with DD coil antenna,the decoupling antenna system improves the suppression ability of wireless power transmission signal by 85 dB.

关 键 词：磁耦合 无线数电同传 解耦 DD线圈 

分 类 号：TN713.5[电子电信—电路与系统]