Results 31 to 40 of about 389,631 (317)
Patterns of the radiation properties for Peano antennas
Scientific Reports, 2023 AbstractThis paper studies metallic microstrip antennas with air as a substrate in the UHF band, patterned after space-filling, self-avoiding, and self-similar (FASS) Peano curves. Our novel study is based on context-free grammar and genetic programming as computing tools to unravel the role of geometry on both; the Voltage Standing Wave Ratio (VSWR ...
René Pérez-Moroyoqui +2 more
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Физика волновых процессов и радиотехнические системыBackground. Antenna arrays are widely used in a variety of modern radio engineering systems for wireless communication and radar. The phenomenon of mutual coupling of antenna elements, which is manifested in practical implementation, may cause noticeable
Anatoly M. Bobreshov +4 more
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Calculation of radiation patterns
Electronics Letters, 1969 The letter proves that two distinct methods of calculating the radiation pattern of a spherical-aperture distribution are mathematically equivalent, i.e. by a spherical-harmonic expansion or by Silver's far-field formula. The merits of each method and their extension to arbitrary-shaped apertures are briefly discussed.
J.R. James, L.W. Longdon
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Resonance Cones in the Field Pattern of a Short Radio Frequency Probe in a Warm Anisotropic Plasma [PDF]
, 1970 An experimental investigation of the angular field pattern of a small radio frequency probe in a plasma in a magnetic field is described. The field is observed to become very large along a resonance cone whose axis is parallel to the static magnetic ...
Fisher, R. K., Fisher, Raymond Kurt
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Optical Nanoantennas with Tunable Radiation Patterns [PDF]
Nano Letters, 2013 We address new optical nanoantenna systems with tunable highly directional radiation patterns. The antenna comprises a regular linear array of metal nanoparticles in the proximity of an interface with high dielectric contrast. We show that the radiation pattern of the system can be controlled by changing parameters of the excitation, such as the ...
Munarriz, J. +3 more
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Microstrip Patch Antenna for GNSS Applications
Applied SciencesThis research paper presents the results of an analysis conducted on a microstrip patch antenna designed to operate within the 1.559–1.591 GHz frequency band, which encompasses three major satellite constellations: GPS, Galileo and BeiDou.
Hatice-Andreea Topal +1 more
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Физика волновых процессов и радиотехнические системы, 2019 The apertures amplitude-phase distribution of a linear antenna array, ensuring the formation of frequency-independent direction-finding characteristics in a wide frequency band, is considered.
N.I. Bobkov +2 more
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Optical Scattering of Liquid Gallium Nanoparticles Coupled to Thin Metal Films
Nanomaterials, 2020 We investigate experimentally and numerically the scattering properties of liquid gallium nanoparticles coupled to a thin gold or silver film. The gallium nanoparticles are excited either directly by using inclined white light or indirectly by surface ...
Fu Deng +4 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
Nonreciprocal Radiation Pattern Metasurface Transformer
, 2019 This paper presents the concept of nonreciprocal radiation pattern metasurface transformer. The metasurface is placed on top of a source antenna, transforms the radiation pattern of the source antenna, introducing different radiation patterns for ...
Taravati, Sajjad +7 more
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