Results 11 to 20 of about 80,326 (308)

Highly efficient polarization converter with wide angular stability [PDF]

open access: yesScientific Reports
This paper presents a multi-band polarization converter using spoof surface plasmon polaritons (SSPP), addressing the growing demand for efficient polarization control in modern communication systems, radar, and sensing technologies.
Changiz Ghobadi   +2 more
doaj   +4 more sources

Single/Dual/Triple Broadband Metasurface Based Polarisation Converter with High Angular Stability for Terahertz Applications [PDF]

open access: yesMicromachines, 2022
This paper presents design and characterisation of a new compact metasurface based linear polarisation converter for terahertz applications. The metasurface unit cell with periodicity of 0.292λ0 consists of an asymmetrically oriented planar double ...
Shyam Sundar Pati, Swaroop Sahoo
doaj   +2 more sources

Miniaturised wideband metasurface polarisation converter with high angular stability [PDF]

open access: yesScientific Reports
This paper presents a single-layer miniaturised wideband transmissive linear-to-circular (LTC) polarisation converter. The unit cell employs symmetrically arranged meandered metallic strips with engineered gaps that govern its resonance behavior.
Cho Hilary Scott Nkimbeng   +6 more
doaj   +2 more sources

Study on Angular Free Vibration Stability and Parameters Influence of Dry Gas Seal Based on the Characteristic Equation

open access: yesShock and Vibration, 2022
Based on Laplace transform and Hurwitz stability criterion, the system characteristic equation and algebraic stability criterion of the two degree-of-freedom angular free vibration of dry gas seal are derived. The effects of rotational inertia, stiffness
Liming Teng   +4 more
doaj   +2 more sources

A Miniaturized FSS Using the Parallel LC Resonant with Angular Stability. [PDF]

open access: yesSensors (Basel)
This paper proposes a highly symmetrical miniaturized, frequency-selective surface (FSS) based on LC parallel resonance to optimize high-frequency passband characteristics, enhancing transmission efficiency under large-angle conditions. Through meandered design optimization, the device size is further reduced.
Sun C   +5 more
europepmc   +4 more sources

Trunk angular velocity: A convenient, valid and responsive substitute for force plate-based measures of dynamic postural stability.

open access: yesPLoS ONE
ObjectiveDeficits in dynamic postural stability are associated with increased risk of lower limb injuries. Objective dynamic postural stability assessments typically require force plates, which are not commonly available in the clinic.
Lammert A Vos   +4 more
doaj   +2 more sources

Location of generating units most affecting the angular stability of the power system based on the analysis of instantaneous power waveforms [PDF]

open access: yesArchives of Control Sciences, 2020
In the paper, the results of investigations on the location of generating units most affecting the angular stability of a large power system (PS) are presented.
Piotr, Pruski, Stefan, Paszek
doaj   +1 more source

Multi-criteria optimization of the parameters of PSS3B system stabilizers operating in an extended power system with the use of a genetic algorithm [PDF]

open access: yesArchives of Control Sciences, 2022
In the paper, the application of multi-criteria optimization of the parameters of PSS3B system stabilizers to damping electromechanical swings in an extended power system (PS) is presented. The calculations of the power system stabilizer (PSS) parameters
Adrian Nocoń   +2 more
doaj   +1 more source

Dual-Band Wide-Angle Reflective Circular Polarization Converter with Orthogonal Polarization Modes

open access: yesSensors, 2022
Herein a dual-band wide-angle reflective circular polarization converter, based on a metasurface was developed. The unit cell is composed of a split square ring and a nested square patch.
Bianmei Zhang   +5 more
doaj   +1 more source

Angular and Polarization Stability of Broadband Reconfigurable Intelligent Surfaces of Binary Type

open access: yesIEEE Access, 2022
Recently, reconfigurable intelligent surfaces (RISs) gained notable consideration due to their ability to provide efficient and cost-effective wireless communication networks.
Javad Shabanpour, Constantin R. Simovski
doaj   +1 more source

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