New Convenient Composite Probes With 0°/180° Hybrid Couplers for Near-Field Scanning Measurements

作     者：Wang, Lei Wang, Rui-Qi Luo, Chengyang Lu, Guoguang 

作者机构：CEPREI Sci & Technol Reliabil Phys & Applicat Elect Compo Guangzhou 510610 Peoples R China Shaanxi Univ Sci & Technol Sch Elect Informat & Artificial Intelligence Xian 710026 Peoples R China 

出 版 物：《IEEE SENSORS JOURNAL》 (IEEE Sensors J.)

年 卷 期：2025年第25卷第11期

页      面：18982-18988页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0804[工学-仪器科学与技术] 0702[理学-物理学] 

主　　题：Composite probe high sensitivity hybrid coupler multiple components wideband probe 

摘      要：In this work, we propose two new convenient composite probes with 0 degrees/180 degrees hybrid couplers for near-field scanning measurements. The proposed probes (denoted as A and B) integrate a U-shaped loop as the driven element and a parallel U-shaped loop as the parasitic element, two different 0 degrees/180 degrees hybrid couplers, two interconnected vias, and a pair of 50- Omega striplines. The design leverages the driven and parasitic U-shaped loops to concurrently detect electric-field (E-field) and magnetic-field (H-field) components and improve detection sensitivity, thereby extending the probes capability to capture a wider spectrum of electromagnetic fields. The integrated 0 degrees/180 degrees hybrid couplers enable precise differentiation and superposition of outputs from the driven loop, effectively isolating the E-field and H-field responses. Crucially, this architecture permits direct connectivity to oscilloscopes, eliminating dependence on vector network analyzers (VNAs) for electromagnetic component sensing. The design, simulation, measurement, and characterization of two Probes A and B are detailed. Measurement results demonstrate these probes enhanced sensitivity and dual-field measurement capability. The ability of directly link to oscilloscopes, bypassing the need for a VNA, makes these probes highly suitable for practical interference source location testing.