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[IEEE 2018 International Semiconductor Conference (CAS) - Sinaia (2018.10.10-2018.10.12)] 2018 International Semiconductor Conference (CAS) - Metal-Insulator Transition in Monolayer M<inf>o</inf>S<inf>2</inf> for Tunable and Reconfigurable Devices
摘要： In this paper, we show the electromagnetic design of a small patch antenna based on a molybdenum disulphide (MoS2) monolayer, with an area of only 22mm2, that exhibits high radiation efficiency and large tunability in microwaves at 10GHz thanks to a metal-insulator transition (MIT) induced by electrostatic gating. Furthermore, the MIT in MoS2 is used to reconfigure a tunable carbon nanotube-based filter, conferring it different functionalities: low-pass, high-pass and band-pass around 2GHz, while its carbon nanotube varactors allow tuning the cutoff frequency or central frequency.
关键词： tunable filters,carbon nanotubes,Microstrip antennas,molybdenum compounds
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) - Reykjavik, Iceland (2018.8.8-2018.8.10)] 2018 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) - Design of Frequency Tunable LTCC Coaxial SIW Filters with Constant Passband Shape
摘要： This paper deals with the design of substrate integrated coaxial ?lters in multi-layer low temperature co-?red ceramic (LTCC) technology with centre frequency tunability, while keeping constant passband characteristics along the whole tuning range. A structure consisting on switchable embedded capacitances is employed. Moreover, inner and outer layers are used for implementing frequency-dependent coupling structures, enabling to match the required input/output and inter-resonator coupling levels at the different ?lter states. Thus, a tunable ?lter with four equidistant centre frequencies in the C-band is designed with nearly constant bandwidth (BW) at the different states. Experimental results show the validity of the proposed approach for implementing frequency tunable coaxial substrate integrated waveguide (SIW) ?lters with low losses, high selectivity and compact size.
关键词： LTCC,constant passband,coaxial resonators,tunable filters,SIW
更新于2025-09-23 15:21:21
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Electrically tunable multicolored filter using birefringent plasmonic resonators and liquid crystals
摘要： Dynamic tuning of color filters finds numerous applications including displays or image sensors. Plasmonic resonators are sub–wavelength nanostructures which can tailor the phase, polarization and amplitude of the optical field but they are limited in color vibrancy when used as filters. In this work, birefringence–induced colors of plasmonic resonators and a fast switching thin liquid crystal cell are combined in a multicolored electrically tunable filter. With this mechanism, the color gamut of the plasmonic surface and the liquid crystal cell is mutually enhanced in order to generate all primary additive and subtractive colors with high saturation as well as different tones of white. A single filter is able to cover more than 70% of the color gamut of standard RGB filters by applying a voltage ranging between 2V and 6.5V. This spectral selectivity is added in transmission without any loss in the image resolution. The presented approach is foreseen to be implemented in a variety of devices including miniature sensors or smart-phone cameras to enhance the color information, ultra–flat multispectral imagers, wearable or head–worn displays as well as high resolution display panels.
关键词： liquid crystals,color display,nanoimprint lithography,multispectral imaging,Plasmonic colors,tunable filters
更新于2025-09-12 10:27:22