Results 21 to 30 of about 159 (128)
Recent Progress in Active Mechanical Metamaterials and Construction Principles
Advanced Science, Volume 9, Issue 1, January 5, 2022., 2022 Active mechanical metamaterials (AMMs) are newly emerged metamaterials in recent decades. Due to the elaborately designed internal micro‐structures and stimuli‐responsive characteristics, AMMs have both the advantages of unusual mechanical properties of mechanical metamaterials and the smart actuation functions of active materials.
Jixiang Qi +10 more
wiley +1 more source
VHF/UHF Wideband Slim Monopole Antenna with Distributed Matching Structures
International Journal of Antennas and Propagation, Volume 2022, Issue 1, 2022., 2022 This paper presents a wideband monopole antenna with distributed matching structures operating on VHF/UHF bands. The antenna consists of a slim rectangular metal strip with a T‐type slot etched on the upper half, two rectangular slots on the lower half, and two rectangular plates soldered with the bottom end of the main strip.
Dongjie Qin, Baohua Sun, Chien-Jen Wang
wiley +1 more source
Nanophotonics, Volume 11, Issue 3, Page 559-570, January 2022., 2022 Abstract Surface‐enhanced Raman spectroscopy (SERS) has been widely investigated and employed as a powerful optical analytical technique providing fingerprint vibrational information of molecules with high sensitivity and resolution. In addition to metallic nanostructure, dielectric micro‐/nano‐structures with extraordinary optical manipulation ...
Yanlin Mi +5 more
wiley +1 more source
3D Propulsions of Rod‐Shaped Micropropellers
Advanced Intelligent Systems, Volume 3, Issue 11, November 2021., 2021 An asymmetric structural design is proposed to construct rod‐shaped micropropellers that can realize surface‐free 3D propulsions. These 3D micropropellers have an in‐plane rotating “spinning” mode to gain high speed and an out‐of‐plane biconical rotating “precession” mode to pass through narrow channels with a smaller rotation radius, which makes them ...
Yuan Zhang +6 more
wiley +1 more source
Advanced Materials Interfaces, Volume 8, Issue 6, March 23, 2021., 2021 Ultrathin films at the air water interface are manipulated in a controlled way to represent the semicrystalline morphology of a temperature‐memory polymer at distinct points of the programming/switching cycle. The degradability under enzymatic catalysis depends on the deformation temperature, which is also reflected in the viscoelastic properties ...
Rainhard Machatschek +2 more
wiley +1 more source
Equivalent Test Method for Strong Electromagnetic Field Radiation Effect of EED
International Journal of Antennas and Propagation, Volume 2021, Issue 1, 2021., 2021 The present study proposed the equivalent test method for the strong electromagnetic field radiation of electric explosive devices (EEDs) of the weapon equipment to satisfy the military requirements of the electromagnetic radiation safety test, as well as the evaluation of the electric ignition, the electric initiation ammunition, or missiles.
Biao Wang +5 more
wiley +1 more source
Compact top-loaded ultra-wideband biconical antenna for indoor base-station applications [PDF]
, 2010 A biconical antenna employing the top-loaded technique is proposed for ultra-band (UWB) operation. The antenna is composed of a small cone mounted on a top-loaded disc and a conical ground plane, with both cones electrically connected together using four
W. J. Lu +7 more
core +1 more source
Interlaboratory comparison of radiated emission measurements using a spherical dipole radiator [PDF]
, 2019 An interlaboratory radiated emission comparison has been performed, comparing electric field strength measurements in the frequency range 30-1000MHz at a 10m open area test site. A spherical dipole radiator is employed as a reference emitter.
Won, SH, Chung, YC, Kim, HT, Kang, TW
core +1 more source
Multiband Compact Printed Dipole Antennas Using NRI-TL Metamaterial Loading [PDF]
, 2012 A compact, fully-printed negative-refractive-index transmission-line (NRI-TL) metamaterial-loaded dipole antenna is proposed, which exhibits multiband resonant characteristics that are not harmonically related.
Antoniades, Marco A. +1 more
core +1 more source
Biconical dipole antenna with circular polarisation [PDF]
, 2013 Tato diplomová práce se zabývá teoretickými poznatky a návrhem bikónické antény pracující v kmitočtovém rozsahu 4 až 8 GHz. V rámci práce jsou také popsány způsoby impedančního přizpůsobení a vybrané typy polarizátorů elektromagnetických vln a ...
Urbaník, Jaroslav
core +4 more sources