Results 31 to 40 of about 5,311 (260)
Compact mode-matched excitation structures for radar distance measurements in overmoded circular waveguides [PDF]
Advances in Radio Science, 2008 This contribution deals with guided radar level measurements of liquid materials in large metal tubes, so-called stilling wells, bypass or still pipes.
G. Armbrecht +5 more
doaj
Antenna Design for Directivity-Enhanced Raman Spectroscopy
International Journal of Optics, 2012 Antenna performance can be described by two fundamental parameters: directivity and radiation efficiency. Here, we demonstrate nanoantenna designs in terms of improved directivity.
Aftab Ahmed +3 more
doaj +1 more source
IEEE Access, 2019 A new mode transducer for converting the TE10 rectangular waveguide mode to the TM01 circular waveguide mode is presented. The novel topology is based on two T-type junctions with in-phase excitation at their input rectangular ports.
Jose R. Montejo-Garai +2 more
doaj +1 more source
Propagation of electromagnetic pulses and calculation of dynamic invariants in a waveguide with a convex shell [PDF]
Компьютерная оптика, 2018 In this paper, we consider a method for solving a system of Maxwell's equations in the case of time-dependent boundary conditions at the end of a waveguide with superconducting walls.
Sergey Kharitonov +3 more
doaj +1 more source
Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications
Advanced Functional Materials, EarlyView.Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi +3 more
wiley +1 more source
A Novel CP Horn Antenna with Switchable Polarization by Single Port Feeding
International Journal of Antennas and Propagation, 2015 A novel CP horn antenna with switchable polarization by single port feeding is presented. The antenna is composed of a coaxial-waveguide converter and a balance-cavity, a horn, a square-to-circular waveguide transition, and a stepped-septum polarizer ...
Yangzhen Huang +4 more
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A High-Power Radar Rotary Joint
Frontiers in Physics, 2022 Due to the power capacity limitation of the rotary joint, mechanical scanning radars are limited to use high-power microwave sources to improve their performance furthermore. To solve this problem, an over-mode circular waveguide rotary joint with radial
Zhiqiang Zhang, Kaibin Xue, Zibin Weng
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Light‐Actuated Fiber‐Climbing Inchworm Robot Toward Endoluminal Navigation
Advanced Functional Materials, EarlyView.A kirigami‐inspired soft inchworm robot harnesses optical energy from a customized side‐emitting optical fiber, guaranteeing its propulsion along the fiber body. The wavelength‐selective responsiveness of dye‐functionalized liquid crystal elastomers and the application of temporal illumination patterns enable sequential control of robot components. The
Antonio Lobosco +6 more
wiley +1 more source
Twin Crystal Moiré Metasurfaces for Crossing Flat‐Band Transport
Advanced Functional Materials, EarlyView.This study introduces twin crystal moiré metasurfaces, breaking in‐plane symmetry to enable reconfigurable acoustic wave manipulation. By adjusting the twin angle and interlayer twist angle, various combinations of hyperbolic, flat bands, and elliptic states can be synthesized in the system.
Shida Fan +9 more
wiley +1 more source
Microwave Complex Permittivity of Yttria-Stabilized Zirconia
IEEE Open Journal of Instrumentation and Measurement, 2023 The complex permittivity of 8-mol yttria-stabilized zirconia (8-YSZ) in powder and sintered (i.e., solid) forms were measured from 32 to 40 GHz using a circular waveguide probe.
Anna Case, Aaron Barvincak, Reza Zoughi
doaj +1 more source