Details

Autor(en) / Beteiligte

• Singh, Jasdeep
• Bahel, Shalini

Titel

Dielectric ceramics-based tunable and frequency-selective electromagnetic interference shields for next-generation applications

Ist Teil von

• Journal of materials science. Materials in electronics, 2021-06, Vol.32 (12), p.16052-16068

Ort / Verlag

New York: Springer US

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Developing electromagnetic interference (EMI)-shielding materials is urgently required to alleviate the harmful impacts of electromagnetic pollution generated by present-day electronics and telecommunication industries. In this work, we propose novel (Sr x Mg 1− x )(Ti 0.95 Sn 0.05 )O 3 (0.025 ≤  x  ≤ 0.10) ceramics prepared via solid-state mixed oxide route to mitigate exceedingly growing electromagnetic pollution. The structural properties of the prepared samples were investigated by X-ray diffraction, Rietveld refinement, Raman spectroscopy, and scanning electron microscopy. The dielectric and shielding properties were determined using a vector network analyzer. Results showed that the synthesized dielectrics displayed distinctive frequency-selective EMI shielding effectiveness (SE) peaks, owing to the employment of Fabry–Pérot cavity resonance. Interestingly, the SE peak positions could be tuned by varying the thickness of the shield and the amount of Sr doping. Composition with x  = 0.025 showed an excellent EMI SE of up to 32.5 dB with a sample thickness of 2.7 mm, at 23.1 GHz frequency in the K (18–26.5 GHz) band. Similarly, composition with x  = 0.10 displayed EMI SE of up to 31.85 dB with a sample thickness of 1.8 mm, at 29.47 GHz frequency in the Ka (26.5–40 GHz) band. These results provide a simple, feasible, and robust approach for designing low-cost, frequency-selective, and tunable EMI shields, especially for next-generation devices and applications.