Results 101 to 110 of about 553,920 (293)

SPECTRAL APPROACH TO ESTIMATION OF REFLECTION RESONANCES IN A RECTANGULAR WAVEGUIDE WITH A RECTANGULAR POST

open access: yesRadio Physics and Radio Astronomy, 2014
Revealing the physical phenomena causing various resonant phenomena is a key to successful design of frequency selective structures. Within the frames of the spectral theory of open waveguide resonators, the nature of the total reflection resonance ...
L. P. Mospan
doaj   +1 more source

Nanostructured Optical Superabsorbers from Carbon Nanotube Forest for Heat Management Using Environmental Blackbody Radiation from the Visible to Mid‐Infrared

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Our computational model of the optical absorption from multiwalled carbon nanotubes suggests the optical absorption depends strongly on the in‐plane electrical conductivity, and weakly on the through‐plane conductivity. Such strong absorption enables solar‐to‐thermal conversion for heat scavenging in cold climates and radiative cooling in hot climates,
José V. Anguita   +8 more
wiley   +1 more source

Broadband double-layered coplanar patch antennas with adjustable CPW feeding structure [PDF]

open access: yes, 2004
In this paper, we have presented the double-layered coplanar patch antennas of enhanced impedance bandwidth and adjustable conductor-backed coplanar waveguide feed lines.
Tong, K.F.   +3 more
core  

Recent advances in multifunctional soft robots: A materials–structures–systems co‐design perspective for synergistic integration

open access: yesFlexMat, EarlyView.
Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu   +3 more
wiley   +1 more source

Rectangular dielectric waveguide and its optimal transition to a metal waveguide [PDF]

open access: yes, 2002
The purpose of this work was to study the rectangular dielectric waveguide and its transitions to metal waveguide at millimeter wavelengths. The thesis reviews different dielectric waveguiding structures, their analysis methods and their transitions to ...
Dudorov, Sergey, Sergey Dudorov
core  

Antena Slot Waveguide Segi Empat Segala Arah pada Frekuensi 2.4 GHz

open access: yesJurnal Elektronika dan Telekomunikasi, 2016
Antena diharapkan memiliki desain dengan konstruksi yang lebih mudah, murah dan efisien. Antena slot waveguide adalah antena gelombang mikro. Antena ini berupa suatu waveguide yang mempunyai slot–slot membentuk array dan terletak pada dinding waveguide ...
Sri Hardiati   +3 more
doaj   +1 more source

Topological Metamaterial for Magnetic Resonance Imaging

open access: yesInterdisciplinary Materials, EarlyView.
This work introduces a wireless, passive topological circuit metamaterial for Magnetic resonance imaging (MRI) that supports dual topological boundary states, enabling superior local radiofrequency field confinement. Planar‐to‐three‐dimensional stacking enhances image signal‐to‐noise ratio across imaging sequences, offering a robust and clinically ...
Siyong Zheng   +16 more
wiley   +1 more source

Broadband Mode Converter With Customizable Modal Ratio Leveraging Subwavelength Engineering for Advanced Multimode Silicon Photonics

open access: yesLaser &Photonics Reviews, EarlyView.
This work introduces a customizable mode converter for multimode silicon photonics, enabling precise control over the conversion ratio between optical modes. The device operates across a broad wavelength range (1350–1700 nm) with 15 distinct conversion levels.
Raquel Fernández de Cabo   +7 more
wiley   +1 more source

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