School of Electronic and Information Engineering, Beihang University, Beijing 100191, China.
Beijing Engineering Research Center of High-Reliability IC with Power Industrial Grade, Beijing Smart-Chip Microelectronics Technology Co., Ltd., Beijing 102299, China.
Sensors (Basel). 2023 Jul 5;23(13):6170. doi: 10.3390/s23136170.
This article presents a miniature ultrawideband active magnetic probe which is composed of a passive structure and an active amplification circuit structure. The active circuit mainly contains two chips, specifically an amplification chip (HMC797APM5E) and a power management chip (HMC980LP4E). The maximum size of the probe is no more than 64 × 41.5 mm. Compared with the passive probe with the same-sized loop, the sensitivity of the proposed probe is enhanced by 25 dB through the active circuit design. The working frequency bandwidth of the proposed probe can cover 9 kHz to 18 GHz. Additionally, the flatness is about ±4 dB in terms of |S| in the stable working bandwidth. It is efficient for high-frequency near-field scanning.
本文提出了一种微型超宽带主动磁探头，由无源结构和有源放大电路结构组成。有源电路主要包含两个芯片，分别是一个放大芯片（HMC797APM5E）和一个电源管理芯片（HMC980LP4E）。探头的最大尺寸不超过 64×41.5mm。与具有相同尺寸环路的无源探头相比，通过有源电路设计，该探头的灵敏度提高了 25dB。所提出的探头的工作频率带宽可以覆盖 9kHz 至 18GHz。此外，在稳定工作带宽内，|S|的平坦度约为±4dB。它非常适用于高频近场扫描。
