Abstract
Non-ideal ground structures in flexible printed circuit board, such as the meshed ground or discrete ground nets, can cause severe RFI to the nearby antennas. Those RF radiators can be modeled as a set of equivalent dipole moment(s) when they are electrically small. Then, the dipole moment-based reciprocity theorem can be applied to estimate the noise coupling level. In this article, a practical methodology using the dipole moment-based reciprocity is proposed to identify multiple radiation sources of a real cellphone product. Multiple equivalent dipole moments are constructed with one-to-one correspondence to the physical structures. The reciprocity calculations can eventually provide the noise contributions of each noise source.
Recommended Citation
S. Xia et al., "RFI Estimation for Multiple Noise Sources Due to Modulation at a Digital Mic using Diople Moment based Reciprocity," 2020 IEEE International Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMCSI 2020, Institute of Electrical and Electronics Engineers, Jul 2020.
The definitive version is available at https://doi.org/10.1109/EMCSI38923.2020.9743517
Department(s)
Electrical and Computer Engineering
Keywords and Phrases
dipole moment; near-field scan; radio-frequency interference; reciprocity
International Standard Book Number (ISBN)
978-172817430-3
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Institute of Electrical and Electronics Engineers, All rights reserved.
Publication Date
01 Jul 2020
Comments
National Science Foundation, Grant IIP-1440110