Results 41 to 50 of about 221,941 (298)

Sharp Response Microstrip LPF using Folded Stepped Impedance Open Stubs [PDF]

, 2013
A novel microstrip lowpass filter with high selectivity and wide stopband is proposed that comprises two lateral folded open stubs and a central mirrored semi-circle ended suppressing cell.
Ahmadi, A., Majidifar, S., Makki, S. V., Rahmani, Z., Sariri, H.   +4 more
core   +1 more source

Enhanced Responsivity, Accuracy, and Stability of Aerosol Jet Printing via Mechanical Switching Valve Assisted Internal Shuttering

Advanced Science, EarlyView.
This work demonstrates ultra‐high ON‐OFF responsivity of AJP by mechanical switching valve assisted shuttering. The jet relaxation and ON‐OFF delay are substantially eliminated from greater than 35 s, maintaining patterning quality independent of the variations of printing parameters, permitting excellent process stability and universality.
Jinhang Wang, Li Meng, Shuhuan Zhang, Pan Chen, Kaiwen Wei, Beibei Zhu, Xiaoyan Zeng   +6 more
wiley   +1 more source

A new impedance matching method for an ultra-wide band and dual circularly polarised feed [PDF]

, 2016
In traditional antenna design, metal components are not placed in the central part of the antenna as they change the characteristics of near field radiation.
Chen, Zhi Jun, Jeffrey, Natasha, Li, Sha, Liu, Dong Hao, Wang, Wei, Yan, Yi Hua, Zhang, Fu Shun   +6 more
core   +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

Analysis of Two Dimensional Graphene-Based Multilayered Structures Using the Extended Method of Lines

IEEE Access, 2018
In this paper, the method of lines is extended to analyze 2-D graphene-based multilayered structures. The graphene plates with tensor conductivity may cover partially or totally the interfaces between two consecutive layers.
Ali Mehrdadian, Hossein Hatefi Ardakani, Keyvan Forooraghi   +2 more
doaj   +1 more source

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

Advanced 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, Tiia Tyystälä, Mikko Nelo, Heli Jantunen, Jari Juuti, Jarkko Tolvanen, Jari Hannu   +6 more
wiley   +1 more source

Broadband GaN Class-E Power Amplifier for Load Modulated Delta Sigma and 5G Transmitter Applications

IEEE Access, 2018
The paper presents a design of a broadband high-efficiency class-E power amplifier (PA) for the advanced efficiency enhancement architectures applications.
Tushar Sharma, Pouya Aflaki, Mohamed Helaoui, Fadhel M. Ghannouchi   +3 more
doaj   +1 more source

Planar microstrip YAGI antenna array [PDF]

, 1993
A directional microstrip antenna includes a driven patch surrounded by an isolated reflector and one or more coplanar directors, all separated from a ground plane on the order of 0.1 wavelength or less to provide end fire beam directivity without ...
Huang, John
core   +1 more source

New opportunities for bioscaffold‐enabled spinal cord injury repair

BMEMat, EarlyView.
Schematic illustration of bioscaffolds for spinal cord injury repair. We summarize the effects of bioscaffold properties on SCI repair, highlight different types of bioscaffolds, various fabrication strategies, and in vivo transformations for the clinical development of SCI‐repairing bioscaffolds.
Xiaoqing Qi, Yicheng Fu, Zhaoliang Su, Li Li, Subrata Chakrabarti, Peng Li, Yilun Wu, Fang Liu, Teng Gao, Zhifeng Dong, Lei Liu, Pei Cao   +11 more
wiley   +1 more source

Ultra-low SLL slotted waveguide antenna array using Chebyshev aperture distribution function for MM-wave tracking radar applications

Ain Shams Engineering Journal
A non-uniform aperture distribution slotted waveguide antenna is presented. The slotted waveguide antenna array is chosen for its ease for aperture distribution control and the flexibility of gain adjustment.
Basma M. Yousef, Allam M. Ameen, Ayman Elboushi   +2 more
doaj   +1 more source