Results 11 to 20 of about 1,103,532 (303)

Optimization of superconducting antenna arrays using RBF neural network [PDF]

International Journal for Simulation and Multidisciplinary Design Optimization, 2010
In this work, RBF neural network is used to optimize the radiation pattern of non-uniform linear arrays of High superconducting rectangular microstrip antennas, on uniaxial anisotropic substrate.
Barkat O., Benghalia A.
doaj   +1 more source

Multiband Reconfigurable Antennas for 5G Wireless and CubeSat Applications: A Review

IEEE Access, 2022
The rapid development of wireless technology has sparked interest in multi-band reconfigurable antennas as devices and satellites are innovating toward miniaturization.
Kebonyethebe Ramahatla, Modisa Mosalaosi, Abid Yahya, Bokamoso Basutli   +3 more
doaj   +1 more source

First-principles method for high-$Q$ photonic crystal cavity mode calculations [PDF]

, 2012
We present a first-principles method to compute radiation properties of ultra-high quality factor photonic crystal cavities. Our Frequency-domain Approach for Radiation (FAR) can compute the far-field radiation pattern and quality factor of cavity modes $
Akahane, Bog, C. Martijn de Sterke, Chak, Chaumet, Christopher G. Poulton, Englund, Englund, Farjadpour, Galli, J.E. Sipe, Johnson, Kokou B. Dossou, Kuramochi, Lee, Lindsay C. Botten, Mandelshtam, McCutcheon, Nozaki, Portalupi, Ross C. McPhedran, Sahand Mahmoodian, Sauvan, Sipe, Song, Tomljenovic Hanic, Tomljenovic-Hanic, Tran, Yoshie, Zhang   +29 more
core   +1 more source

Characterization of Acoustic Sources by Optical Feedback Interferometry

Proceedings, 2017
Sound can be described as the propagation of pressure variations in compressible media that involves compression and expansion and induces a change in the density of the medium.
Fernando Urgiles, Julien Perchoux, Thierry Bosch   +2 more
doaj   +1 more source

A Compact Wideband Active Two-Dipole HF Phased Array

Applied Sciences, 2021
The design and construction of an upgraded HF quarter-wavelength two-dipole active array with 90° difference feed was implemented in the course of a research project to perform a directional (azimuthal) investigation of interference at HF.
Antonios Constantinides, Haris Haralambous   +1 more
doaj   +1 more source

The High Energy Radiation Pattern from BFKLex [PDF]

, 2016
We discuss a recent study on high-energy jet production in the multi-Regge limit done with the use of the Monte Carlo event generator BFKLex which includes collinear improvements in the form of double-log contributions.
Chachamis, G., Vera, A. Sabio
core   +1 more source

Analytical Approach to Parameter Determination in Kaiser Function for Power-weighted Antenna Array Design

Journal of ICT Research and Applications, 2023
Window methods that are frequently used in the design of finite impulse response filters are also applicable to antenna array designs. This paper explores the application of a Kaiser function in a power-weighted antenna array design, focusing on the ...
Hartuti Mistialustina, Chairunnisa Chairunnisa, Achmad Munir   +2 more
doaj   +1 more source

Double-heterostructure cavities: from theory to design [PDF]

, 2012
We derive a frequency-domain-based approach for radiation (FAR) from double-heterostructure cavity (DHC) modes. We use this to compute the quality factors and radiation patterns of DHC modes. The semi-analytic nature of our method enables us to provide a
C. Martijn de Sterke, Christopher G. Poulton, H. A. van der Vorst, J. D. Joannopoulos, J. E. Sipe, Kokou B. Dossou, Lindsay C. Botten, R. Hines, Ross C. McPhedran, Sahand Mahmoodian   +9 more
core   +1 more source

Adjusting Radiation Pattern of Small Antennas [PDF]

2020 International Workshop on Antenna Technology (iWAT), 2020
The antenna clusters have been used to control the impedance properties of the antenna, but they have potential also in radiation pattern reconfigurability. We demonstrate the benefits of multi-feed antennas using a mobile antenna as an example.
Luomaniemi, Rasmus, Viikari, Ville, Lehtovuori, Anu   +3 more
openaire   +3 more sources

Modeling the radiation pattern of LEDs

Optics Express, 2008
Light-emitting diodes (LEDs) come in many varieties and with a wide range of radiation patterns. We propose a general, simple but accurate analytic representation for the radiation pattern of the light emitted from an LED. To accurately render both the angular intensity distribution and the irradiance spatial pattern, a simple phenomenological model ...
Ivan, Moreno, Ching-Cherng, Sun
openaire   +2 more sources