Two New Composite Probes Featuring Enhanced Sensitivity and Dual-Component Measurement Capabilities
Kai Zhong, Xinyu Lu, Xiyou Sun, Lei Wang · IEEE Sensors Letters · 2025
In this study, two new composite probes featuring enhanced sensitivity and dual-component measurement capabilities are presented and analyzed. Unlike conventional differential loop probes, the proposed designs incorporate multiple loops to significantly promote detection sensitivity. First, a pair of differential loops connected by a via is utilized to enable collaboratively simultaneous measurement of electric- and magnetic-field components. Moreover, in order to further enhance sensitivity, a pair of additional modified U-shaped loops are integrated as series and parallel units on the outer side of the structure in the design of Probes A and B, respectively. It is worth noting that two ends of these additional modified U-shaped loops are directly connected to these differential loops adjacent to them to optimize detection sensitivity. The primary distinction between Probes A and B lies in the configuration of the additional modified U-shaped loops: Probe A employs a series arrangement, whereas Probe B utilizes a parallel arrangement. Furthermore, in order to minimize the probes' profile, the additional modified U-shaped loops and grounded planes are strategically positioned on the outermost layers of the probes. Finally, these composite probes (Probes A and B) are simulated, fabricated, and experimentally validated to demonstrate their high-sensitivity and multicomponent measurement capabilities. Compared to previously conventional designs, the experimental results demonstrate that these proposed probes achieve significantly enhanced sensitivity in measuring both electric and magnetic field components.