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DCON26_SLIDES_Track11_CharacterizationandSuppressionofRFICausedbyLPCAMM2StructuralResonanceinCompactLaptops_82_132.pdf

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1、Welcome to ConferenceFebruary 2426,2026Santa Clara Convention CenterExpoFebruary 2526,2026 1Characterization and Suppression of RFI Caused by LPCAMM2 Structural Resonance in Compact LaptopsMinsu Lee,(SK hynix)Minsue Lee(SK hynix),Jeongho Ju(SK hynix),Seongho Ahn(SK hynix),Kihoon Kim(SK hynix),Wonhyu

2、n Son(SK hynix),Taeil Bae(SK hynix),Inchul Jeong(SK hynix),Hyungsoo Kim(SK hynix)2ImageSPEAKERSMinsu LeePrincipal Engineer,SK |Minsu Lee received the B.E.degree in Electronic Engineering in 2007 from the Kyungpook National University,Republic of Korea.He is a principal engineer in SK hynix Inc.His r

3、esearch interests include electromagnetic compatibility(EMC),system-level signal integrity,power integrity for DRAMs.3 Introduction EMI/RFI Characterization Root Cause Analysis of LPCAMM2 Radiation Experimental Validation of Cavity Resonance in LPCAMM2 Design Techniques to Eliminate Cavity Resonance

4、 in LPCAMM2 ConclusionOutline4Introduction5The rise of AI Laptops and the RFI Coexistence ChallengeEMC CLASSIFICATION6EMCElectromagnetic Compatibility:Ability of a system to function in its EM environment without causing or suffering interference.EMI VS.EMSEMI(Emission):Noise generated by the device

5、.EMS(Susceptibility):Ability to resist external noise.RFIRadio Frequency Interference:Specifically EMI that couples into RF antennas,causing receiver desensitizationMobile Evolution and Antenna Proximity7 Rapid growth of applications such as AI Agents,on-device AI along with the evolution of 5G,clou

6、d,edge computing infrastructure.increases integration density of semiconductor devices in mobile platforms.Compact platforms such as laptops and smartphones require close proximity between processing ICs and RF antennas.This proximity increases the risk of electromagnetic noise coupling into RF ante

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1. **问题背景**:LPCAMM2作为新型笔记本内存,因“浮动”结构间隙引发腔体共振,导致3.5–5.2GHz(含5G N77/78频段)射频干扰(RFI),可能使接收灵敏度 degrade 约3dB。 2. **核心发现**:近场扫描与仿真证实,PMIC区域的梯形结构形成λ/4腔体(15.3mm),共振频率4.9GHz,是RFI主因;数据率升高(如7467Mbps)加剧风险。 3. **验证与抑制**:实验通过EMI吸收材料(0.5mm厚)使近场噪声降低13–16dB,5G噪声减少8dB;设计优化方案包括减小间隙高度、移除间隙或模块边缘接地,可消除共振。 4. **结论**:需内存、插座及系统厂商协作,通过结构设计抑制共振,确保LPCAMM2与5G/Wi-Fi 6E/7共存。
内存如何干扰5G? 笔记本为何辐射超标? 如何解决射频干扰?
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