The effect of drop shape, sensing volume and raindrop size statistics to the scattered field on 300 GHz

M Kokkonen, H Juttula, A Mäkynen, S Myllymäki… - IEEE …, 2021 - ieeexplore.ieee.org
Scattering and attenuation properties of rain using various drop models are calculated using
Mie theory, the T-matrix method and numerical technique respectively. Ellipsoidal and …

An ultralow-loss and lightweight cellulose-coated silica foam for planar fresnel zone plate lens applications in future 6G devices

M Kokkonen, PS Pálvölgyi, R Sliz… - IEEE Antennas and …, 2022 - ieeexplore.ieee.org
Several passive components of fifth-generation (5G) and future sixth-generation (6G)
telecommunication devices require substrate materials of very low dielectric permittivity and …

Lens structures from novel materials for fixed and steerable beams antenna systems at sub-THz range

M Kokkonen - 2024 - oulurepo.oulu.fi
In this thesis, the feasibility of four different composite materials as a lens to be integrated
into an antenna at frequencies 110–170 GHz or 220–330 GHz was investigated. The …