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홈 홈 > 연구문헌 > 영문 논문지 > IEIE Transactions on Smart Processing & Computing (IEIE SPC)

IEIE Transactions on Smart Processing & Computing (IEIE SPC)

Current Result Document : 10 / 10

한글제목(Korean Title) Radio Frequency Interference Analysis of Camera Modules and Antennas in Smartphones
영문제목(English Title) Radio Frequency Interference Analysis of Camera Modules and Antennas in Smartphones
저자(Author) Youngbong Han   SeungHyuk Lee   SoYoung Kim  
원문수록처(Citation) VOL 08 NO. 04 PP. 0298 ~ 0305 (2019. 08)
한글내용
(Korean Abstract)
영문내용
(English Abstract)
As the size of mobile devices decreases and the number of cameras in the system increases, high-speed data transmission from the camera module causes neighboring Wi-Fi antenna performance degradation. In this paper, we analyze the radio frequency interference (RFI) between the flexible printed circuit board (FPCB) of a camera module and the neighboring antenna using active scattering parameters (S-parameters) extracted using a 3D full-wave electromagnetic simulator. Return loss for the active S-parameter of an antenna (S11) can be used to estimate the performance degradation coming from RFI noise sources. Design guidelines are suggested on how to design and place high-speed signal lines near a Wi-Fi antenna to reduce performance degradation. Also, a differential signaling method reduces RFI, compared to single-ended signaling. We suggest that designers replace meander line transmission line structures (used for skew compensation) with a trombone structure. The active S-parameter results are also confirmed by evaluating the radiated electric field (E-field) and coupled voltage levels on the antenna.
키워드(Keyword) Radio frequency interference (RFI)   Antenna   Electromagnetic interference (EMI)   Electromagnetic compatibility (EMC)   Smartphone  
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