Lightweight porous silica foams with extreme-low dielectric permittivity and loss for future 6G wireless communication technologies

• Published in: Nano research Vol. 14; no. 5; pp. 1450 - 1456
• Main Authors: Pálvölgyi, Petra S., Sebők, Daniel, Szenti, Imre, Bozo, Eva, Ervasti, Henri, Pitkänen, Olli, Hannu, Jari, Jantunen, Heli, Leinonen, Marko E., Myllymäki, Sami, Kukovecz, Akos, Kordas, Krisztian
• Format: Journal Article
• Language: English
• Published: Beijing Tsinghua University Press 01.05.2021; Springer Nature B.V
• Subjects: 6G mobile communication; Atomic/Molecular Structure and Spectra; Biomedicine; Biotechnology; Cellulose; Chemistry and Materials Science; Communications systems; Condensed Matter Physics; Dip coatings; Electronic devices; Foams; Frequency filters; Immersion coating; Lightweight; Materials Science; Metals; Metamaterials; Micropatterning; Nanofibers; Nanotechnology; Permittivity; Research Article; Shadow masks; Silica; Silicon dioxide; Slabs; Sol-gel processes; Substrates; Terahertz frequencies; Thin films; Wireless communication systems; Wireless communications; silica foams; low-permittivity materials; templated sol-gel synthesis; 6G telecommunication; low-loss dielectrics

In the next generation wireless communication systems operating at near terahertz frequencies, dielectric substrates with the lowest possible permittivity and loss factor are becoming essential. In this work, highly porous (98.9% ± 0.1%) and lightweight silica foams (0.025 ± 0.005 g/cm 3 ), that hav...