A Method for Measuring the Transfer Function Inside a Compact Metallic Enclosure Using a Slot Antenna

Radio frequency desensitization issues comprise two components: noise radiation sources and the transfer function from noise sources to the victim antenna. For modern electronic products, noise sources are often located inside a compact metal enclosure, making it difficult to measure the transfer fu...

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Bibliographic Details
Published in:IEEE transactions on electromagnetic compatibility 2024-10, p.1-8
Main Authors: Su, Xiangrui, Huang, Wenchang, Cho, Junghee, Paek, Joonki, Hwang, Chulsoon
Format: Article
Language:English
Subjects:
Antenna measurements
Dipole antennas
Laptop
Magnetic moments
Magnetic noise
Magnetic shielding
Noise
Noise measurement
radio frequency (RF) desensitization
slot antenna
Slot antennas
transfer function measurement
Transfer functions
Voltage measurement
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Summary:Radio frequency desensitization issues comprise two components: noise radiation sources and the transfer function from noise sources to the victim antenna. For modern electronic products, noise sources are often located inside a compact metal enclosure, making it difficult to measure the transfer function using conventional methods. Moreover, opening the metallic enclosure would dramatically change the transfer function, and inserting a near-field probe into the enclosure is challenging and may not even be possible because of the limited space inside. In this article, a novel practical method for measuring the transfer function inside a compact metallic enclosure is proposed and experimentally validated. A slot antenna with a known magnetic dipole moment is created on the metallic enclosure, replacing the real noise source. The proposed method is applied to a practical device (a laptop with an embedded Wi-Fi antenna), and the transfer function measurement is successfully validated, with an error of less than 4 dB.
ISSN:0018-9375
1558-187X
DOI:10.1109/TEMC.2024.3466089