Results 41 to 50 of about 11,822 (226)

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

Advanced 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, Shriram Ramanathan, Ronald P. Jenkins, Michael J. Carter   +3 more
wiley   +1 more source

Time domain response of corrugated transmission lines

IET Microwaves, Antennas & Propagation
In order to employ periodic corrugated microstrip lines for reducing or suppressing electromagnetic interference in high‐speed or high‐frequency circuits, a precise method is necessary to calculate and measure the characteristic impedance of periodic ...
Chia Ho Wu, Wei Wang, Song Tsuen Peng, Zhenyu Qian, Jianqi Shen, Guoqiang Ye, Donghua Ni, Fang He, Linfang Shen, Bisheng Quan, Yajie Jiao   +10 more
doaj   +1 more source

Highly Vertically Oriented Graphene Microstrip Pads With Ultrahigh Through‐Plane Thermal Conductivity and Ultralow Compressive Modulus for Efficient Heat Dissipation

Advanced Science, EarlyView.
Vertically aligned graphene microstrip pads (GMPs) break the traditional thermomechanical trade‐off in thermal interface materials. It simultaneously achieves an ultrahigh through‐plane thermal conductivity of 565.92 W m−1 K−1 and an ultralow compressive modulus below 115.16 kPa.
Xu Ran, Yaru Wang, Sijia Wu, Hejun Wang, Junhao Shen, Litao Sun, Xing Wu, Hengchang Bi   +7 more
wiley   +1 more source

High power, broadband, coaxial to microstrip bi‐directional coupler in the VHF/UHF band

IET Science, Measurement & Technology
Broadband couplers consist usually of multiple coupled lines that are each a quarter wave‐length long. Herein, in contrast to conventional methods, a short length of a microstrip line is coupled to a coaxial line.
Tohid Naeimi, Arash Ahmadi
doaj   +1 more source

Resonator for microwave magnetoelectric effect [PDF]

ITM Web of Conferences, 2019
The design of a ring resonator made on a microstrip transmission line is presented. A study of ferromagnetic resonance using this design was made. Computer simulation of a microstrip ring resonator was carried out, and amplitude-frequency characteristics
Lobekin Vyacheslav, Tatarenko Alexandr, Belyshev Andrei, Bichurin Mirza   +3 more
doaj   +1 more source

Ultra-Broadband Directional Couplers Using Microstrip with Dielectric Overlay in Millimeter-Wave Band

, 2011
Nowadays, millimeter-wave systems are being a key factor to develop wide band applications. In this paper, a directional coupler in millimeter-wave band using dielectric overlay is presented.
Alonso Montes, José I., Gonzalez Martin, Jorge, Peláez Pérez, Ana María, Alonso Montes, José Ignacio, Almorox González, Pablo   +4 more
core   +1 more source

Metasurface‐Enabled Active‐Like Passive Radar

Advanced Science, EarlyView.
A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li, Jiawen Xu, Hanting Zhao, Xu Zhao, Yanjin Chen, Tie Jun Cui, Vincenzo Galdi, Lianlin Li   +7 more
wiley   +1 more source

X-Ray Imager With a 20 mm Width Microstrip Line for the Extreme Ultraviolet Spectrometer

IEEE Access, 2019
A time-resolved x-ray imager based on the gated microchannel plate (MCP) technology is reported. The single MCP microstrip line with a width of 20 mm is formed to improve the spatial resolving capability.
Houzhi Cai, Pokun Deng, Wenyong Fu, Dong Wang, Yunfei Lei, Junkun Huang, Yong Wang, Jinyuan Liu   +7 more
doaj   +1 more source

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

Advanced 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

Bandwidth Extension of Planar Microstrip-to-Waveguide Transition by Controlling Transmission Modes Through Via-Hole Positioning in Millimeter-Wave Band

IEEE Access, 2019
This paper presents a design technique to achieve a broadband planar microstrip-to-waveguide transition in a millimeter-wave (mmWave) band. In the conventional planar microstrip-to-waveguide transition, via holes are located around the rectangular ...
Nguyen Thanh Tuan, Kunio Sakakibara, Nobuyoshi Kikuma   +2 more
doaj   +1 more source