Results 101 to 110 of about 750,689 (337)
A compact broadband spiral antenna
, 2008 This paper presents a dual arm equiangular spiral antenna with embedded chip resistors and a compact balun. In order to reduce the size of the spiral antenna, a compact balun is developed which can be integrated into the spiral ...
Elias Lopez-Lara (19975581) +3 more
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Shaping Matter with Acoustic Waves: From Particles to Functional Structures
Advanced Functional Materials, EarlyView.Acoustic‐directed assembly is reviewed as a materials‐oriented strategy for organizing particles, polymers, metals, and biological systems into functional structures. The review distinguishes reversible manipulation from permanent structure formation through medium fixation, particle fixation, and in situ material generation, highlighting routes toward
Avraham Kenigsberg +5 more
wiley +1 more source
, 2014 The first practical equiangular spiral antenna was constructed by J. D. Dyson in 1958. This paper discusses a cavity-backed equiangular antenna system composed of two arms. An equiangular spiral antenna has a wide frequency bandwidth. A cavity transforms
中村 卓人
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Multidimensional Cellular Micro‐Compartments to Model Invasive Lobular Carcinoma Dormancy
Advanced Healthcare Materials, EarlyView.Invasive lobular carcinoma (ILC) is an understudied subtype of breast cancer that is susceptible to late recurrences. In this study, micro‐compartmentalization techniques spanning multiple dimensions, including 2D, pseudo‐3D, and 3D, are integrated to uncover the mechanisms underlying ILC dormancy, revealing the central role of p27Kip1.
Xilal Y. Rima +15 more
wiley +1 more source
Advanced Healthcare Materials, EarlyView.Spontaneous helical alignment of smooth muscle cells is induced within resistance‐vessel‐sized channels patterned within a hydrogel. The extent of the cells’ orientation angle is dependent on the presence and composition of ECM proteins lining the channel wall and cell seeding density.
Victoria D. Vest +5 more
wiley +1 more source
Design and Construction of a 500–800 MHz Square Spiral Dipole Microstrip Antenna Structure
Journal of Electrical Engineering and ComputerAn antenna can be used to detect an object. The dimensions of the antenna also affect the working frequency, the smaller dimensions, the higher the working frequency and the closer the antenna range to radiate waves.
Arif Milando Setiawan
doaj +1 more source
Transient Charging of Mixed Ionic‐Electronic Conductors by Anomalous Diffusion
Advanced Materials, EarlyView.This article explores charge transport in mixed ionic‐electronic conductors (MIECs) through electrochemical impedance spectroscopy and transient current analysis. Focusing on PEDOT:PSS, WO3, and n‐doped PBDF, it uncovers the impact of anomalous diffusion via fractional modeling. The study reveals key correlations that deepen understanding and guide the
Heyi Zhang +9 more
wiley +1 more source
Characteristics of two-way conical logospiral antennas with grid and chiral reflectors
Физика волновых процессов и радиотехнические системы, 2019 This paper presents the results of mathematical modeling of a two-way conical logospiral antenna with a reflector made of spiral-based metamaterial. A comparative analysis of the results of mathematical modeling of this antenna with the classical design ...
V.A. Kapitonov +4 more
doaj +1 more source
Spiral Microstrip Antenna with Resistance
, 1998 A spiral microstrip antenna having resistor elements embedded in each of the spiral arms is provided. The antenna is constructed using a conductive back plane as a base.
Shively, David G.
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Compact Spiral Loaded Printed Monopole Antenna
, 2010 A novel miniaturized printed monopole structure is proposed. The antenna comprises a printed monopole strip which is loaded by a spiral located on the rearside connected by a via.
Bao, Xiulong, Ammann, Max
core +1 more source