Results 81 to 90 of about 67,724 (288)

A low‐profile and wide‐beamwidth microstrip patch antenna using parasitic patch elements

Electronics Letters
This paper presents a low‐profile patch antenna with dual‐axis wide‐beam characteristics. The antenna includes a microstrip patch antenna and four parasitic patch elements. The study demonstrates that both the E‐plane and H‐plane beams can be extended by
Maodudul Hasan, Masaya Tamura
doaj   +1 more source

DIPOLE ANTENNAS WITH A SECTOR-SHAPED RADIATION PATTERN [PDF]

Radio Physics and Radio Astronomy
Subject and Purpose. The directivity characteristics of a dipole antenna when it is placed above and parallel to a perfectly conducting screen of rectangular shape are considered, aiming to theoretically study dipole antennas with sector-shaped radiation
M. M. Gorobets, N. P. Yeliseyeva, S. L. Berdnyk, O. M. Horobets   +3 more
doaj   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source

Dual‐Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips‐Bags for Year‐Round Thermal Management

Advanced Functional Materials, EarlyView.
Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch   +4 more
wiley   +1 more source

Design of Optically Transparent Antenna with Directional Radiation Patterns

International Journal of Antennas and Propagation, 2017
An optically transparent antenna with directional radiation pattern is proposed in this paper. This antenna consists of a radiation patch above the transparent glass substrate and a frequency selective surface acting as the ground of microstrip antenna ...
Yuan Yao, Wanzhong Chen, Xiaodong Chen, Junsheng Yu   +3 more
doaj   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

Advanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu, Giovanni Gammaitoni, Michael Häfner, Eduardo Villalobos‐Portillo, Carlo Marini, Matteo Bianchini   +5 more
wiley   +1 more source

A reconfigurable wideband and multiband antenna using dual-patch elements for compact wireless devices [PDF]

, 2011
This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2012 IEEEA reconfigurable wideband and multiband C-Slot patch antenna with dual-patch elements is proposed and studied.
AbuTarboush, H.F., AbuTarboush, H.F., Al-Raweshidy, H.S., Al-Raweshidy, H.S., Budimir, D., Budimir, D., Cheung, S.W., Cheung, S.W., Nasr, K.M., Nasr, K.M., Nilavalan, R., Nilavalan, R., Peter, T., Peter, T.   +13 more
core   +2 more sources

Theory of v.o.r. antenna radiation patterns

Electronics Letters, 1971
The radiation field produced by v.o.r. antennas consisting of Alford loops located above a circular conducting ground plane is investigated theoretically and experimentally. Geometrical theory of diffraction is applied to obtain the theoretical expressions for the far field produced by such an antenna.
openaire   +1 more source

Simple reconfigurable antenna with radiation pattern

Electronics Letters, 2008
A radiation pattern reconfigurable antenna is proposed. By controlling the switch states, the antenna can be worked as a monopole antenna with an omnidirectional radiation pattern or a dipole antenna with reflector, which has directional radiation pattern.
W.S. Kang, J.A. Park, Y.J. Yoon
openaire   +1 more source

Intramolecular Down‐ and Up‐Conversion in Dimeric Tetracene Complexes Centered via Platinum(II) and Palladium(II)

Advanced Functional Materials, EarlyView.
Metal‐tetracene dimeric complexes are synthesized through the pyridyl coordination to either Pt(II) or Pd(II). Photophysical properties are systematically compared as a function of the metal using steady‐state and time‐resolved spectroscopy. The Pt(II) dimer exhibits efficient intramolecular singlet fission and subsequent intramolecular up‐conversion ...
Yifan Bo, Yuxuan Hou, Melchor Matabuena, Rik R. Tykwinski, Dirk M. Guldi   +4 more
wiley   +1 more source