Results 71 to 80 of about 2,325 (294)

Fixed-frequency beam-steerable leaky-wave antennas [PDF]

, 1998
grantor: University of TorontoA detailed description of the fundamentals of operation of two fixed-frequency beam-steerable leaky-wave antennas developed during the course of this research is presented.
Noujeim, Karam M.
core  

Rigorous evaluation of losses in uniform leaky-wave antennas [PDF]

, 2020
General formulas are proposed for thoroughly evaluating the radiation efficiency of traveling-wave antennas operating in any radiating regime. Indeed, existing theoretical models only work in the scanned-beam region, where the radiating mode is ...
Fuscaldo W
core   +1 more source

Reconfigurable THz Fixed-Frequency Beamscanning Through a Liquid-Crystal-Loaded Leaky Waveguide Operating in Its Fundamental TE Mode

IEEE Access, 2023
A rectangular metallic leaky waveguide loaded with liquid crystals (LC) and operating in its fundamental TE mode at 1 THz is proposed to mitigate the well-known trade-off between directivity and tunable angular range of dynamic beamscanning antennas. The
Walter Fuscaldo, Elahehsadat Torabi, Dimitrios C. Zografopoulos, Danilo Erricolo, Romeo Beccherelli   +4 more
doaj   +1 more source

Mesoporous Silica Nanoparticles in Biomedicine: Advances and Prospects

Advanced Materials, EarlyView.
Mesoporous silica nanoparticles offer unique properties like high surface area, tunable pores, and functionalization. They excel in drug delivery, tissue engineering, and stimuli‐responsive therapies, enabling targeted and controlled treatments. With roles in cancer therapy and diagnostics, their clinical translation requires addressing challenges in ...
Miguel Manzano, María Vallet‐Regí
wiley   +1 more source

Rectilinear leaky-wave antennas with broad beam patterns using hybrid printed-circuit waveguides [PDF]

, 2011
A theoretical study on the design of broadbeam leaky-wave antennas (LWAs) of uniform type and rectilinear geometry is presented. A new broadbeam LWA structure based on the hybrid printed-circuit waveguide is proposed, which allows for the necessary ...
Weily, AR, A. R. Weily, Guo, YJ, Y. J. Guo, J. L. Gomez-Tornero, Gómez-Tornero, JL   +5 more
core   +1 more source

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

Gain Optimization Methods for SIW Leaky-Wave Antennas with Transverse Slots [PDF]

, 2022
S.173-176Substrate integrated waveguides (SIW) with transverse slots on the top plane can be used as effective leaky-wave antennas with end-fire radiation capabilities.
Vaupel, Thomas
core   +1 more source

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

Advanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang, Byeongseok Ryu, Sujeong Ahn, Junhyub Kim, Myeonghun Jang, Jeong Ho Cho, Won‐Gun Koh, Hyungsuk Lee   +7 more
wiley   +1 more source

Energetic Offset in Organic Solar Cells‐ Importance, Confusion and Outlook

Advanced Materials, EarlyView.
Energetic offsets in organic solar cells (OSCs) remain a subject of debate due to measurement‐ and lab‐dependent discrepancies. This Perspective clarifies the physical origins of these variations and identifies temperature‐dependent electro‐optical methods as a reliable approach to obtain consistent offset values.
Nakul Jain, Xian'e Li, Mats Fahlman, Olle Inganäs, Koen Vandewal, Feng Gao   +5 more
wiley   +1 more source

Full‐angle beam scanning leaky‐wave antenna array based on spoof surface plasmon polaritons

IET Microwaves, Antennas & Propagation
A design scheme of high‐gain and full‐angle frequency beam scanning leaky wave antenna (LWA) and array is proposed based on spoof surface plasmon polaritons (SSPPs) slow‐wave transmission line (TL) for radar field applications.
Jun Wang, Yuqi Yao, Xianglin Kong, Ruofeng Xu, Lei Zhao   +4 more
doaj   +1 more source