Theory of Simulated-Skin-Effect Filters a Thin Film Approach to EMI

Schlicke, Heinz M.

doi:10.1109/temc.1964.4307329

Cited by 7 publications

(2 citation statements)

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“…5a, b in transmission mode, terahertz waves undergo significant attenuation when passing through HMN composite films, which proves that HMN composite films have strong shielding performance for terahertz waves. Because of the signal-to-noise ratio, porosity of the material, and the special functional relationship between the SE and frequency, the EMI SE part fluctuates in the whole THz range [18,53,54]. However, within the range of 0.1-4 THz, the averaging THz EMI SE is 114.6 dB (Fig.…”

Section: Electromagnetic Properties Andmentioning

confidence: 99%

Hollow Metal–Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion

Mai,

Chen,

Wang

et al. 2024

Nano-Micro Lett.

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With the continuous advancement of communication technology, the escalating demand for electromagnetic shielding interference (EMI) materials with multifunctional and wideband EMI performance has become urgent. Controlling the electrical and magnetic components and designing the EMI material structure have attracted extensive interest, but remain a huge challenge. Herein, we reported the alternating electromagnetic structure composite films composed of hollow metal–organic frameworks/layered MXene/nanocellulose (HMN) by alternating vacuum-assisted filtration process. The HMN composite films exhibit excellent EMI shielding effectiveness performance in the GHz frequency (66.8 dB at Ka-band) and THz frequency (114.6 dB at 0.1–4.0 THz). Besides, the HMN composite films also exhibit a high reflection loss of 39.7 dB at 0.7 THz with an effective absorption bandwidth up to 2.1 THz. Moreover, HMN composite films show remarkable photothermal conversion performance, which can reach 104.6 °C under 2.0 Sun and 235.4 °C under 0.8 W cm−2, respectively. The unique micro- and macro-structural design structures will absorb more incident electromagnetic waves via interfacial polarization/multiple scattering and produce more heat energy via the local surface plasmon resonance effect. These features make the HMN composite film a promising candidate for advanced EMI devices for future 6G communication and the protection of electronic equipment in cold environments.

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Section: Electromagnetic Properties Andmentioning

confidence: 99%

Hollow Metal–Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion

Mai,

Chen,

Wang

et al. 2024

Nano-Micro Lett.

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“…159 One of the earliest papers that laid down the theory of miniature EMI filters was first proposed in 1964 by Schlicke where he suggested that thin film-based ceramic low-pass filters were preferred to mitigate EMI problems over their counterparts as these filters were easy to fabricate and showed better response at high frequencies. 160 Since then much effort has been put into developing EMI filters that can combat the adversities posed by EMI noises. [161][162][163][164][165][166] In 2006, Nan et al developed an EMI filter that consisted of a large high permeability loop (to suppress CM noise) and two smaller low permeability loops (to suppress DM noises) arranged transversely along the diameter of the larger loop.…”

Section: Emi Filtersmentioning

confidence: 99%

Electromagnetic Interference (EMI): Measurement and Reduction Techniques

Mathur

Raman

2020

Journal of Elec Materi

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Electromagnetic interference (EMI) is one of the biggest challenges faced during the production of any electronic device. The effect on the performance of the instrument due to these inevitable interferences must be carefully measured to understand and quantify the electromagnetic compatibility (EMC) of the instrument under test. If the EMI profile of the system does not meet the accepted standards, then it becomes necessary to take measures to reduce the influence of these unwanted interferences so that the equipment can be used in the real world. Unfortunately, research and studies on EMI and EMC have not received their due attention from the scientific community. Moreover, the literature available for this area of research is scattered where different sources provide information on one or more (but not all) aspects of EMI/EMC while ignoring the others. With the objective of encompassing this extremely significant area of research in its entirety, this review presents both EMI measurement techniques and EMI reduction techniques in detail. EMI measurement techniques are presented under two sections that deal with emission testing and immunity testing, respectively. Herein, EMI reduction techniques are presented under four sections, where electromagnetic shielding has been given special attention under which various methods used by the scientific community to measure the shielding effectiveness of a material or microwave absorber and its application in EMI reduction are illustrated. This is followed by EMI filters, circuit topology modification and spread spectrum. This review can help students and young scientists in this area to get an idea of the ways to conduct EMI tests as well as the ways that can be employed to reduce the EMI of the system, depending on the application.

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Microwave Filters to Combat RF Interference

Young

1968

IEEE Trans. Electromagn. Compat.

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Theory of Simulated-Skin-Effect Filters a Thin Film Approach to EMI

Cited by 7 publications

References 0 publications

Hollow Metal–Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion

Hollow Metal–Organic Framework/MXene/Nanocellulose Composite Films for Giga/Terahertz Electromagnetic Shielding and Photothermal Conversion

Electromagnetic Interference (EMI): Measurement and Reduction Techniques

Microwave Filters to Combat RF Interference

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