Results 61 to 70 of about 202,998 (281)

Wideband and Multiband Antenna Design and Fabrication for Modern Wireless Communications Systems

Journal of ICT Research and Applications, 2014
One of the major challenges due to spectrum scarcity in modern wireless communication is on antenna design that can serve a non-contagious frequency spectrum.
Adit Kurniawan, Salik Mukhlishin
doaj   +1 more source

Influence of the Antennas on the Ultra-Wideband Transmission

EURASIP Journal on Advances in Signal Processing, 2005
Summary: Spectrum is presently one of the most valuable goods worldwide as the demand is permanently increasing and it can be traded only locally. Since the United States Federal Communications Commission (FCC) has opened the spectrum from 3.1 GHz to 10.6 GHz, that is, a bandwidth of 7.5 GHz, for unlicensed use with up to -41.25 dBm/MHz EIRP, numerous ...
Sörgel, W., Wiesbeck, Werner
openaire   +3 more sources

Inverse Design of Nanoparticulate Materials

Advanced Materials, EarlyView.
Inverse design shifts nanomaterial development from empirical trial‐and‐error to predictive model‐driven strategies. It can rely on knowledge‐based, data‐based, or hybrid process and property functions. This perspective article provides a practical framework for applying inverse design based on instructive examples. It discusses which modeling approach
Nabi Etienne Traoré, Annika Mauch, Michelle Berthold, Lukas Pflug, Wolfgang Peukert, Nicolas Vogel   +5 more
wiley   +1 more source

Life‐Like Ferrous Oxide Microspheres from Kombucha

Advanced Materials Interfaces, EarlyView.
Kombucha bacterial cellulose, sodium alginate, and ferrous nitrate self‐assemble into membrane‐enclosed iron oxide microspheres. These microspheres bud daughter vesicles, sustain 24‐h electrochemical oscillations, and filter theta‐band signals.
Panagiotis Mougkogiannis, Anna Nikolaidou, Andrew Adamatzky   +2 more
wiley   +1 more source

A Millimeter-Wave Wideband Sparse Array of Surface-Wave-Immune Laminated Resonant Elements for High-Resolution Radars

IEEE Journal of Microwaves
We first present a wideband millimeter-wave sparse array of novel wideband laminated resonant antennas (LRAs) tailored for high-resolution radars applications.
Zijian Shao, Zheng Liu, Emir Ali Karahan, Xiaolong Huang, Wenkai Fang, Kaushik Sengupta   +5 more
doaj   +1 more source

Design and Characterization of a Flexible Wideband Antenna Using Polydimethylsiloxane Composite Substrate

International Journal of Antennas and Propagation, 2018
The design and characterization of a simple, flexible wideband antenna using polydimethylsiloxane (PDMS) composite are presented. Conductive fibers are used to construct the metallic parts on a PDMS composite.
S. M. Abbas, S. C. Desai, K. P. Esselle, J. L. Volakis, R. M. Hashmi   +4 more
doaj   +1 more source

Ultra‐White Elastomeric Coatings for Daytime Radiative Cooling

Advanced Materials Technologies, EarlyView.
Passive daytime radiative cooling meets elasticity in a new class of ultra‐white silicone coatings. Combining high solar reflectance with strong sky‐window emission, they hold surfaces below ambient temperature under full sunlight while remaining flexible and stretchable. This combination of cooling performance and mechanical flexibility enables energy‐
Abdulrahman Aljwirah, Xiaojie Liu, Khalid Alhammadi, Orlando G. Rivera Gonzalez, Won‐June Lee, Xiulin Ruan   +5 more
wiley   +1 more source

Wideband and Low-Profile Array of Tightly Coupled Dipole Subarrays [PDF]

Journal of Electromagnetic Engineering and Science
This letter introduces a novel wideband, low profile, tightly coupled dipole subarray for wireless communication systems. The proposed subarray, composed of 3 × 3 unit elements, offers a planar structure with high aperture efficiency. The unit element is
Seongjung Kim, Sangwook Nam
doaj   +1 more source

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

Advanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting, Yuh‐Chyi Chang, Yi‐Chan Hung, Cheng‐Yuan Hsiao, Chao‐Kai Wen, Tsung‐Hsien Lin   +5 more
wiley   +1 more source

Design of a Circularly Polarized Planar Monopole Antenna with a Simplified Radiator Structure for UWB Applications [PDF]

Journal of Electromagnetic Engineering and Science
The demand for wideband circularly polarized (CP) antennas in wireless communication applications has been increasing, given that it offers reliable signals with reduced interference.
Seungyong Park, Longyue Qu, Min-Seok Park, Kyung-Young Jung   +3 more
doaj   +1 more source