Khodeir Mahmoud Mohammed, Yan Zhaowen, Zhao Fuyu
School of Electronic and Information Engineering, Beihang University, Beiijng 100191, China.
Sensors (Basel). 2024 Jul 2;24(13):4295. doi: 10.3390/s24134295.
A sensitive, miniaturized, ultrawideband probe is proposed for near-field measurements. The proposed probe is based on a new V-shaped tip design and a slope structure resulting in better field distribution and impedance matching with a span bandwidth from 10 kHz up to 52 GHz, which is compatible with ultrawideband applications. The proposed E-probe fabrication process utilizes a four-layer printed circuit board (PCB) using Rogers RO4003 (tm) and RO4450 high-performance dielectrics, with εr = 3.55 and 3.3, respectively. The probe length is 40 mm with a minimum width of 4 mm, which is suitable for narrow, complex, and integrated PCBs. The passive E-probe sensitivity is -106.29 dBm and -87.48 dBm at 2 GHz and 40 GHz, respectively. It has a very small spatial resolution of 0.5 mm at 20, 25, 30, and 35 GHz. The probe is small and cheap and can diagnose electromagnetic interference (EMI) in electronic systems such as telemetry, UAVs, and avionics.
提出了一种用于近场测量的灵敏、小型化超宽带探头。所提出的探头基于一种新型V形尖端设计和一种斜坡结构，可实现更好的场分布和阻抗匹配，其跨度带宽从10 kHz到52 GHz，与超宽带应用兼容。所提出的E型探头制造工艺采用四层印刷电路板（PCB），使用罗杰斯RO4003（tm）和RO4450高性能电介质，相对介电常数分别为3.55和3.3。探头长度为40 mm，最小宽度为4 mm，适用于狭窄、复杂和集成的印刷电路板。无源E型探头在2 GHz和40 GHz时的灵敏度分别为-106.29 dBm和-87.48 dBm。在20、25、30和35 GHz时，它具有非常小的0.5 mm空间分辨率。该探头体积小、成本低，可诊断遥测、无人机和航空电子等电子系统中的电磁干扰（EMI）。
