Results 131 to 140 of about 750,689 (337)
Pattern calculations on a loaded spiral antenna.
, 1963 The purpose of this thesis is to calculate and p lot the radiation patterns o f a ferrotron-loaded spiral antenna made of semicircles. In particular, this work is confined to a balanced spiral free to radiate in all directions.
Briceno, Jose
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Miniature Soft Robot With Magnetically Reprogrammable Surgical Functions
Advanced Materials, EarlyView.Miniature soft robots have great prospects to revolutionize minimally invasive treatments. Here we present a miniature soft robot, which can be reprogrammed to perform five surgical functionalities with six‐degrees‐of‐freedom motions. This soft robot can prospectively make minimally invasive surgery considerably safer and painless, and enable ...
Chelsea Shan Xian Ng +4 more
wiley +1 more source
Advanced Materials, EarlyView.Associating a red‐NIR phosphorescent octahedral hexanuclear molybdenum cluster compound with hexaethyleneoxide chains bearing mesogenic units on both ends leads to an emissive hybrid liquid crystal showing mesomorphism on a very unusual temperature range down to −25°C.
Killiann Heinz +11 more
wiley +1 more source
AI–Guided 4D Printing of Carnivorous Plants–Inspired Microneedles for Accelerated Wound Healing
Advanced Materials, EarlyView.This work presents an artificial intelligence (AI)‐guided 4D‐printed microneedle platform inspired by carnivorous plants for wound healing. A thermo‐responsive shape memory polymer enables body temperature–triggered self‐coiling for autonomous wound closure.
Hyun Lee +21 more
wiley +1 more source
Design of Spiral Helix Antenna for Broadband Applications
, 2013 The Aim of the paper is to design and develop a tapered spiral helix antenna covering the frequency range 1-18GHz. Tappered spiral helix antenna is a compact state-of-the-art circularly polarized antenna, which works over multi-octave frequency bandwidth(
Kumar, Dhupam Arun; ANDHRA UNIVERSTIY
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Why Is the Mechanism Underlying the Chiral‐Induced Selectivity Effect Still Challenging?
Advanced Materials, EarlyView.The chiral‐induced spin selectivity (CISS) effect is observed in many experimental configurations and for different materials. However, there are theoretical challenges in attempting to explain those results. A qualitative framework for explaining all the results is presented.
Ron Naaman, Yossi Paltiel
wiley +1 more source
Spiral antenna design with MATLAB
, 2023 Este documento presenta un análisis cuantitativo de las antenas de espiral a partir de diseños y simulaciones realizadas en la suite informática MATLAB. En primer lugar, se presenta una revisión profunda de bibliografía científica previa utilizada como base conceptual para la realización de este trabajo.
openaire +1 more source
Design of spiral antenna using a Vivaldi-shaped balun
, 2019 This paper proposes a design of a spiral antenna using a Vivaldi-shaped balun for broadband matching characteristic with high tolerance to fabrication error and low geometrical complexity.
Byun, Gangil +3 more
core +1 more source
Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix
Advanced Materials, EarlyView.3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández +15 more
wiley +1 more source
Analysis and Design of Broadband Slot Spiral Antennas
, 2007 在本論文中，我們設計一寬頻螺旋型天線，利用理論分析、HFSS 模擬及實驗設計驗證其寬頻特性。我們利用寬頻微帶線和槽帶轉接器設計外部饋入輸入網路並利用寬頻電阻性阻抗轉換器和反射空腔，以改善螺旋型天線的輻射特性。實驗證明此天線可達到 2.2 到 4 GHz 的阻抗頻寬及輻射頻寬，可符合寬頻系統之需求。In this thesis, broadband and multiband Archimedean slot spiral antennas are analyzed and designed. A new
Wu, Wen-Zhou, 吳文洲
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