Results 51 to 60 of about 430,812 (281)
Advanced Engineering Materials, EarlyView.Enhancing ultrasound transmission through an aberration layer exhibiting mismatched impedance with the surrounding medium possesses great implications in imaging and treatment. In this study, we show that a space‐coiling acoustic metamaterial with judiciously tailored structural profile can help improve impedance matching.
Maral Ghanami +4 more
wiley +1 more source
Wideband patch antenna through introducing co‐plane terminal
IET Microwaves, Antennas & PropagationWideband operation is a crucial topic in patch structure research. Various wideband methods have been developed for patch antennas. However, some of the key benefits of patch antennas, such as semi‐space radiation and easy fabrication, are degraded.
Boyu Sima +7 more
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Experimental study of spiral antennas with various additional deceleration options
Физика волновых процессов и радиотехнические системыBackground. The work is aimed at the development and research of flat spiral antennas with additional slowdown. The use of slowdown structures allows to change the operating frequency range of antennas and the electrodynamic characteristics of antennas ...
Dmitrij P. Tabakov, Mikhail A. Malakhov
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Antenna design for a massive multiple input environmental sensor network
Digital Communications and Networks, 2016 This article describes the design and simulation of a pair of antennas on a small PCB with minimal coupling for a massive multiple input sensor network. The two antennas are planar inverted-F antennas (PIFA) that are fed with microstrip feed lines.
J. Craig Prather +4 more
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Advanced Engineering Materials, EarlyView.This article investigates the dependence of the properties on the manufacturing orientation in the form of the inclination angle to the build plate of LPBF‐fabricated NiTi rods with a diameter of 150–220 µm. Metallographic, chemical, thermal, and mechanical characterization show behavior under identical manufacturing conditions that ranges from ...
Sandra Herzig +2 more
wiley +1 more source
Characteristic-Mode-Based Design of Planar In-Band Full-Duplex Antennas
IEEE Open Journal of Antennas and Propagation, 2020 In-band full-duplex radios demand simultaneous transmit and receive (STAR) antennas with high isolation, compact and ultra-low profiles, and simple feed networks. Current state-of-the-art designs rarely meet all of these requirements at the same time. In
Qianyi Li, Ting-Yen Shih
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Advanced Engineering Materials, EarlyView.CT‐based finite element simulations combined with in situ X‐ray computed tomography are used to analyze insert pull‐out in nickel‐coated polymer foams. Despite variations in material parameters, deformation consistently concentrates within a narrow annular region around the insert.
Yannik Bautz +4 more
wiley +1 more source
Design of a novel dual: band planar inverted F - antenna for mobile radio applications
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsThe design of a novel compact dual band PIFA (Planar Inverted F-Antenna) as an embedded antenna is reported in this paper for mobile radio applications.
N. Chattoraj +4 more
doaj +1 more source
Square planar monopole antenna [PDF]
IEE National Conference on Antennas and Propagation, 1999 A broadband square monopole antenna is investigated, showing a constant radiation pattern over the impedance bandwidth. A simple formula for the frequency corresponding to the lower edge of the impedance bandwidth, which has an accuracy of ±8.5% over the frequency range 1 GHz to 6 GHz, is proposed. The effect of the feedgap distance is examined.
openaire +2 more sources