A New Differential Magnetic Probe With Out-of-Phase Balun and Differential Loops

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters Pub Date : 2024-10-31 DOI:10.1109/LMAG.2024.3490383

Lei Wang;Chenbing Qu;Rong Zhou;Zhangming Zhu

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Abstract

In this letter, a new differential magnetic field probe with high sensitivity is presented. The differential magnetic probe includes a 180° out-of-phase balun, a pair of differential detection loops, and an output port with a 50 Ω impedance match. Unlike conventional magnetic probes with a single detection loop, a pair of differential detection loops is used to measure double magnetic-field components. Moreover, a 180° out-of-phase balun is utilized to process the differential-mode signals from these differential detection loops, which can make these probes directly connected to the oscilloscope and no longer rely on vector network analyzers. Finally, the differential magnetic probe is designed, simulated, and measured to verify the design effectiveness, and a near-field scanning system is used to characterize the developed probe. Measured results reveal that the designed differential magnetic probe not only can measure more magnetic-field energy, but also directly connect to the oscilloscope due to its own differential mode operation function in the out-of-phase balun. Therefore, the probe is very suitable for actual interference source location testing.

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一种新型非相平衡差动磁探头

本文介绍了一种新型的高灵敏度差分磁场探头。差分磁探头包括一个180°相外平衡器，一对差分检测回路和一个阻抗匹配为50 Ω的输出端口。与传统的单检测回路磁探头不同，差分检测回路用于测量双磁场分量。此外，利用180°离相平衡器处理来自这些差分检测回路的差模信号，使这些探头直接连接到示波器上，不再依赖矢量网络分析仪。最后，对差分磁探头进行了设计、仿真和测量，验证了设计的有效性，并利用近场扫描系统对所开发的探头进行了表征。测量结果表明，所设计的差分磁探头不仅可以测量更多的磁场能量，而且由于其在失相平衡器中的差分模式工作功能，可以直接连接到示波器上。因此，该探头非常适合实际干扰源定位测试。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.