Results 41 to 50 of about 583,687 (273)

Microstrip Patch Antennas Fed by Substrate Integrated Waveguide [PDF]

open access: yes, 2013
Dizertační práce je zaměřena na výzkum mikropáskových flíčkových antén a anténních řad napájených vlnovodem integrovaným do substrátu (SIW). Využitím vlnovodu integrovaného do substrátu pro napájení mikropáskové flíčkové antény dochází ke kombinaci ...
Mikulášek, Tomáš
core  

RFID coverage extension using microstrip-patch antenna array [PDF]

open access: yes, 2009
In this paper, a UHF-band 2 x 2 microstrip phased-array antenna is designed and implemented to extend the coverage of an RFID reader system. The phased-array antenna has four microstrip-patch antennas, three Wilkinson power dividers, and a transmission ...
Abbak, Mehmet   +2 more
core   +1 more source

Photonic Time Crystals and Time‐Varying Electromagnetic Metamatter: A New Direction for Ultrafast Tunable Photonic and Microwave Materials and Devices

open access: yesAdvanced Science, EarlyView.
Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel   +3 more
wiley   +1 more source

Microstrip Antenna Design with Circular Patch for Skin Cancer Detection

open access: yesAdvanced Electromagnetics, 2019
Due to the many advantages of microstrip patch antennas, nowadays, microstrip patch antennas are mostly preferred in biomedical areas. This study aims two antenna structures, as both transceiver and receiver, have same dimensions are designed to produce ...
R. Top   +3 more
doaj   +1 more source

Liquid Metals in Radio Frequency Applications: A Review of Physics, Manufacturing, and Emerging Technologies

open access: yesAdvanced Electronic Materials, EarlyView.
This paper reviews the physics of liquid metals in RF devices, including the influence of mechanical strain on resonance as well as fabrication methods and strategies for designing tunable and strain‐tolerant inductors, capacitors, and antennas.
Md Saifur Rahman, William J. Scheideler
wiley   +1 more source

The treatment of geometrically small structures in FDTD by the modification of assigned material parameters [PDF]

open access: yes, 2005
A number of different improvements to the analysis by finite-difference time-domain (FDTD) of small structures, such as wires, strips and slots have been proposed in the literature.
Craddock, IJ   +3 more
core   +2 more sources

Inkjet-Printed Microstrip Patch Antennas Realized on Textile for Wearable Applications

open access: yesIEEE Antennas and Wireless Propagation Letters, 2014
This letter introduces a new technique of inkjet printing antennas on textiles. A screen-printed interface layer was used to reduce the surface roughness of the polyester/cotton material that facilitated the printing of a continuous conducting surface ...
W. Whittow   +7 more
semanticscholar   +1 more source

Liquid Metal Elastomer Based Coplanar Waveguide Transmission Line for Stretchable and Self‐Healing RF Electronics

open access: yesAdvanced Electronic Materials, EarlyView.
This work shows the first proof‐of‐concept for fully self‐healing and stretchable coplanar waveguide (CPW) transmission line using printable electrically conductive liquid metal elastomer. RF performance was evaluated in frequency ranging from 1 to 6 GHz under uniaxial tensile strain up to 100%, after self‐healing, and for 1000 cyclic stretch‐release ...
Ahmed Albeltagi   +6 more
wiley   +1 more source

Microstrip patch antenna directivity optimization via Taguchi method

open access: yesAin Shams Engineering Journal
Microstrip patch antennas have gained popularity due to their compact size, flat design, cost-efficiency, and ability to accommodate various design needs.
Mohd H.S. Alrashdan   +2 more
doaj   +1 more source

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

open access: yes, 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.   +8 more
core   +1 more source

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