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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10347218 | PMC |
| http://dx.doi.org/10.3390/s23136170 | DOI Listing |
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