Results 91 to 100 of about 740,547 (334)

Illustration of the Impedance Behaviour of Extremely Low-Profile Coupled Shorted-Patches Antennas for UHF RFID of People

International Journal of Antennas and Propagation, 2014
The recently introduced coupled shorted-patches technique for the design of extremely low-profile UHF RFID tag antennas is used to illustrate the flexibility of selected feeding methods for tuning the antenna input impedance for the complex values ...
Milan Svanda, Milan Polivka
doaj   +1 more source

Low‐Loss Far‐Infrared Surface Phonon Polaritons in Suspended SrTiO3 Nanomembranes

Advanced Functional Materials, EarlyView.
The low‐loss, highly confined, and thickness‐tunable surface phonon polaritons are demonstrated in the far‐infrared regime within transferable freestanding SrTiO3 membranes, achieving high figures of merit comparable to the previous record values from the vdW materials.
Konnor Koons, Hans A. Bechtel, Javier Taboada‐Gutiérrez, Reza Ghanbari, Yueyin Wang, Stephanie N. Gilbert Corder, Alexey B. Kuzmenko, Ruijuan Xu, Yin Liu   +8 more
wiley   +1 more source

Seasonal Variations of Polarization Diversity Gain in a Vegetated Area considering High Elevation Angles and a Nomadic User

International Journal of Antennas and Propagation, 2015
Seasonal variations of the polarization diversity gain are addressed for a nomadic user in a vegetated area taking high elevation angles and nongeostationary satellites into consideration. Corresponding experimental data were obtained at a frequency of 2.
Milan Kvicera, Pavel Pechac
doaj   +1 more source

Engineering Strategies for 2D Layered Tin Halide Perovskite Field‐Effect Transistors

Advanced Functional Materials, EarlyView.
2D halide perovskites are promising candidates for field‐effect transistor (FET) applications due to their high stability and suppressed ion migration in the presence of bulky organic spacers. This review systematically summarizes the optimization engineering strategies of 2D perovskite FETs and future challenges, which provide guidance for developing ...
Shuanglong Wang, Zhitian Ling, Paul W. M. Blom, Tomasz Marszalek, Wojciech Pisula   +4 more
wiley   +1 more source

Clutter Loss Modelling for Low Elevation Link Scenarios

International Journal of Antennas and Propagation, 2016
An analysis of the accuracy of several deterministic and semideterministic propagation models related to calculating clutter loss for low elevation links is presented.
Pavel Valtr, Jan Zeleny, Pavel Pechac, Martin Grabner   +3 more
doaj   +1 more source

Magnetostrictive tactile sensor of detecting friction and normal force for object recognition

International Journal of Advanced Robotic Systems, 2020
Tactile information is valuable in determining properties of objects that are inaccessible from visual perception. A new type of tangential friction and normal contact force magnetostrictive tactile sensor was developed based on the inverse ...
Bing Zhang, Bowen Wang, Yunkai Li, Shaowei Jin   +3 more
doaj   +1 more source

Ionic Metal Poly(heptazine Imides) and Single‐Atoms Interplay: Engineered Stability and Performance for Photocatalysis, Photoelectrocatalysis and Organic Synthesis

Advanced Functional Materials, EarlyView.
Poly(heptazine) imides (PHIs), a crystalline carbon nitride subclass, intercalate metals to deliver high stability, tunable electronics, and efficient charge separation. These features enable solar‐driven applications such as hydrogen evolution, CO₂ reduction, and organic synthesis.
Gabriel A. A. Diab, Izadora F. Reis, Chong Wang, Diandra Barreto, Oleksandr Savateev, Ivo F. Teixeira, Pablo Jiménez‐Calvo   +6 more
wiley   +1 more source

Compact Uplink Circularly Polarized 2.4GHz Short Backfire Antenna for Geostationary Amateur Radio Satellite Es’Hail-2 (QO-100)

IEEE Open Journal of Antennas and Propagation
This paper describes a compact circularly polarized antenna designed for the 2.4GHz band with a gain of 15dBic designed for communication (uplink) with a geostationary amateur radio satellite Es’Hail-2 (QO-100).
Michal Cerveny, Pavel Hazdra
doaj   +1 more source

Neutralization Line Decoupling Tri-Band Multiple-Input Multiple-Output Antenna Design

IEEE Access, 2020
A pair of tri-band multiple-input-multiple-output (MIMO) antennas with high isolation is investigated in this paper. The proposed antenna consists of two monopole antenna elements with an edge to edge spacing of 4 mm ($0.03~\lambda _{0}$ at 2.3 GHz). The
Ruipeng Liu, Xing An, Hongxing Zheng, Mengjun Wang, Zhenbin Gao, Erping Li   +5 more
doaj   +1 more source

Vanadium Doped Magnetic MoS2 Monolayers of Improved Electrical Conductivity as Spin‐Orbit Torque Layer

Advanced Functional Materials, EarlyView.
Electrically conductive and room temperature magnetic atomically thin (≈0.8 nm) vanadium doped MoS2 (V‐MoS2) is demonstrated for its spintronic applications. Here, the spin transport at the interface of permalloy (Py) and high spin‐orbit coupling V‐MoS2 magnetic monolayers is shown.
Krishna Rani Sahoo, Manoj Talluri, Dipak Maity, Suman Mundlia, Ashique Lal, M. S. Devapriya, Arabinda Haldar, Chandrasekhar Murapaka, Tharangattu N. Narayanan   +8 more
wiley   +1 more source