Advanced research trends in dye-sensitized solar cells
This paper reviews the recent progress in DSSC research towards this goal through the development of new device structures, alternative redox shuttles, solid-state hole conductors, TiO2 photoelectrodes, catalyst materials, and sealing techniques, and proposes a scalable cell fabrication process.
Recent developments in perovskites-based precursor inks for scalable architectures of perovskite solar cell technology.
The progressive enhancements in solar-to-electrical conversion within the past decade have allowed organic-inorganic lead halide perovskite-based solar cell (PSC) technology to become a competitive…
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, H. Jantunen
- Physics, Environmental ScienceIEEE Access
Overall, the results showed that in single scattering, the ellipsoid is a good approximation for raindrops and that for large volumes, a spherical drop approximation and a Mie solution may be sufficient at frequencies of 300 GHz and higher.
3×3 Dipole lens antenna at 300 GHz with different permittivity lenses
In telecommunications (5G/6G) lenses can be used to manipulate the electric field emitted by an antenna with 3×3 dipole array acting as antenna source, Iterative study to the lens eccentricity showed different lenses for different permittivity where a lowpermittivity lens with heavily eccentric shape increased antenna gain.
A SENSING DEMONSTRATION OF A SUB THZ RADIO LINK INCORPORATING A LENS ANTENNA
We demonstrate that the future sixth generation (6G) radio links can be utilized for subTHz frequency imaging using narrow beamwidth, high gain, lens antennas. Two different lenses, a bullet or…
LOW PERMITTIVITY ENVIRONMENTALLY FRIENDLY LENSES FOR KU BAND
Lenses can be used to focus and disperse the electric field emitted by the antenna. Sustainable and environmentally friendly lenses were made from lithium molybdenum oxide (LMO) glass composite. Half…
BaSrTiO 3 ceramic‐polymer composite material lens antennas at 220–330 GHz telecommunication applications
Ceramic (Ba 0.55 Sr 0.45 Ti 1.01 O 3 ) – polypropylene polymer ER182 composites-based materials were applied for sub-THz range antenna lens application in telecommunications. Typical plano-convex…
Lens antenna adjustment for telecommunication and imaging modes in a sub‐THz radio system
- A. Ghavidel, S. Myllymäki, M. Kokkonen, N. Tervo, H. Jantunen
- BusinessEngineering Reports
- 14 November 2021
This article presents a concept of a dual‐mode operated sub‐THz frequency radio system by adjusting the lens‐antenna distance for either telecommunication or imaging modes. The signal transmittance…
A Resonator Enhanced UHF RFID Antenna Cable for Inventory and Warehouse Applications
- M. Kokkonen, S. Myllymaki, J. Putaala, H. Jantunen
- BusinessIEEE Journal of Radio Frequency Identification
Structures to improve the RF properties of leaky coaxial cables (LCX) are proposed. These resonator structures are optimized for UHF RFID frequency of 866 MHz; however, they are applicable also to…
240 GHz meta‐surface band pass filter and lens integration in 6G telecommunication systems
240 GHz operated meta‐surface band pass filter consisting of split‐ring resonator (SRR) matrix was simulated and measured as single and second order modes. The filter was integrated with…