Results 91 to 100 of about 85,692 (393)

Dual-band dielectric resonant antenna [PDF]

IEEE Antennas and Propagation Society Symposium, 2004., 2004
Dielectric resonant (DR) antennas with an inserted slit or well are proposed and verified by HFSS simulation. It is found that broadband and dual-band operation can be achieved by perturbation of the air gap.
Yung, Tsung-Shan, Chang, Tze-Hsuan, Wu, Wen-Zhou, Kiang, Jean-Fu   +3 more
openaire   +2 more sources

Two‐Dimensional Materials as a Multiproperty Sensing Platform

Advanced Functional Materials, EarlyView.
Various sensing modalities enabled and/or enhanced by two‐dimensional (2D) materials are reviewed. The domains considered for sensing include: 1) optoelectronics, 2) quantum defects, 3) scanning probe microscopy, 4) nanomechanics, and 5) bio‐ and chemosensing.
Dipankar Jana, Shubhrasish Mukherjee, Dmitrii Litvinov, Magdalena Grzeszczyk, Sergey Grebenchuk, Makars Šiškins, Virgil Gavriliuc, Yihang Ouyang, Changyi Chen, Yuxuan Ye, Meng Yiming, Maciej Koperski   +11 more
wiley   +1 more source

A fundamental limit on the performance of geometrically-tuned planar resonators [PDF]

, 2011
Geometric frequency tuning in planar electromagnetic resonators is common in many applications. It comes, however, at a penalty in the resonance quality, Q0. The literature traces the causes of such penalty often in terms of the shortcomings in the added
Beach, MA, Morris, KA, Naji, A, Warr, PA
core   +2 more sources

Thermoplasmonic Nanorings for Passive Solar‐Responsive Smart Windows in Energy‐Efficient Building Applications

Advanced Functional Materials, EarlyView.
This work presents scalable silver nanorings with tunable thermoplasmonic properties for smart window applications. By responding to sunlight and environmental changes, the nanorings modulate near‐infrared light and reduce heat transmission. Their unique geometry enables dynamic optical control, offering a promising route toward energy‐efficient ...
Xavier Baami González, Duncan S. Sutherland   +1 more
wiley   +1 more source

Electromagnetic analysis and performance comparison of fully 3D-printed antennas [PDF]

, 2019
In this work, the possibility of directly prototyping antennas by exploiting additive manufacturing 3D-printing technology is investigated. In particular, the availability of printable filaments with interesting conductive properties allows for printing ...
Casula, A., Catarinucci, L., Chietera, F., Colella, R., Gatto, G., Michel, A., Montisci, G., Nepa, P., Rogier, Hendrik   +8 more
core   +1 more source

Dualband Split Dielectric Resonator Antenna [PDF]

IEEE Transactions on Antennas and Propagation, 2007
A dualband dielectric resonator antenna (DRA) is designed by splitting a rectilinear dielectric resonator (DR) and carving notches off the DR. It is observed that notches engraved at different positions affect different modes. Removal of dielectric material from where the electric field is strong incurs a significant increase in resonant frequency. The
Chang, Tze-Hsuan, Kiang, Jean-Fu
openaire   +1 more source

Maya Blue‐Inspired Hybrid Coating for Robust and Superhydrophilic Solar Evaporators Using Commercial Black Acrylic Paint

Advanced Functional Materials, EarlyView.
This study demonstrates a Maya blue‐inspired hybrid solar evaporator using commercial black acrylic paint, achieving 98% solar‐thermal conversion efficiency and 2.39 kg m−2 h−1 water evaporation rate through a durable, hydrophilic organic–inorganic structure that enables scalable, cost‐effective desalination and wastewater purification.
Dao Thi Dung, Do Van Lam, Young Kim, Wonzee Jung, Kanghoon Yim, Seung‐Mo Lee   +5 more
wiley   +1 more source

Circular Optical Nanoantennas: An Analytical Theory

, 2012
An entirely analytical theory is provided for describing the resonance properties of optical nanoantennas made of a stack of homogeneous discs, i.e. circular patch nanoantennas.
A. Taflove, B. E. Sernelius, C. A. Balanis, Carsten Rockstuhl, Falk Lederer, J. D. Jackson, Jing Qi, Robert Filter, S. Maier   +8 more
core   +1 more source

Dielectric resonator antennas

International Journal of Antennas and Propagation, 2016
An up-to-date literature overview on relevant approaches for controlling circuital characteristics and radiation properties of dielectric resonator antennas (DRAs) is presented. The main advantages of DRAs are discussed in detail, while reviewing the most effective techniques for antenna feeding as well as for size reduction.
Keyrouz, S., Caratelli, D.
openaire   +1 more source

Electroactive Liquid Crystal Elastomers as Soft Actuators

Advanced Functional Materials, EarlyView.
Electroactive liquid crystal elastomers (eLCEs) can be actuated via electromechanical, electrochemical, or electrothermal effects. a) Electromechanical effects include Maxwell stress, electrostriction, and the electroclinic effect. b) Electrochemical effects arise from electrode redox reactions.
Yakui Deng, Min‐Hui Li
wiley   +1 more source