Results 81 to 90 of about 2,996 (222)
Design, manufacture and measurement of a low-cost reflectarray for global earth coverage [PDF]
, 2016 In this work a low-cost reflectarray with isoflux pattern for global Earth coverage is designed, manufactured and measured at 30GHz. The isoflux template is mathematically derived for a generic satellite and then particularized for a geostationary orbit.
Arrebola Baena, Manuel +5 more
core +2 more sources
Reducing the Sidelobe Level of Reflectarray Antennas Using Phase Perturbation Method
Iranian Journal of Electrical and Electronic Engineering, 2020 Phase Perturbation Method (PPM) is introduced as a new phase-only synthesis method to design reflectarray antennas so as their sidelobe level is reduced.
M. Khalaj-Amirhosseini, M. Nadi-Abiz
doaj
A high gain and high radiation efficiency optical transparent Fabry–Perot cavity antenna
Electronics Letters, Volume 60, Issue 8, April 2024.A novel high gain, high efficiency optically transparent Fabry–Perot Cavity antenna operating in millimetre‐wave is proposed. The antenna employs dual layers of transparent reflective surfaces and a transparent electromagnetic band gap ground to enhance the work band and obtain a high gain radiation.
Kang An, Peng Sun, Aixin Chen
wiley +1 more source
All‐dielectric circularly polarised loop antenna made of high‐permittivity ceramic/water
IET Microwaves, Antennas &Propagation, Volume 18, Issue 4, Page 203-210, April 2024.A class of all‐dielectric CP loop antenna made of high‐permittivity ceramic/water is proposed to take full advantages of dielectric characteristics. 3‐D printing technology is here utilised to form the all‐in‐one structure of the proposed antenna. This work provides a methodology for the implementation of all‐dielectric CP antennas with all‐in‐one ...
Fei Fan +6 more
wiley +1 more source
Broadband electronically tunable reflectionbased phase shifter for active-steering microwave reflectarray systems in Ku-band [PDF]
, 2016 This document provides the design of an electronically reconfigurable microwave phase shifter for reflectarray systems. The phase shifter is based on a hybrid coupler with reflective circuits in three ports.
Fernández González, José Manuel +4 more
core +2 more sources
CUDA-Based Particle Swarm Optimization in Reflectarray Antenna Synthesis
Advanced Electromagnetics, 2020 We show how reflectarray antenna synthesis can take profit from parallel computing on Graphics Processing Units (GPUs). The presented approach uses an implementation of Particle Swarm Optimization in CUDA language and accelerates the computation of the ...
A. Capozzoli, C. Curcio, A. Liseno
doaj +1 more source
The contribution of Julien Perruisseau-Carrier to reconfigurable reflectarray antennas [PDF]
, 2015 An invited talk on the Contribution of Julien Perruisseau-Carrier to Reconfigurable Reflectarray ...
Encinar Garcinuño, Jose Antonio +2 more
core
Offset-fed microstrip reflectarray antenna
Electronics Letters, 1994 A microstrip reflectarray fed with a feed horn offset at a given angle is demonstrated for the first time. The phase considerations for an offset feed horn are applied to a 12 element array of rectangular microstrip patch antennas, operating in X-band, allowing accurate predictions of the redirected radiation based on the offset angle of the feed horn.
R.D. Javor, X.-D. Wu, K. Chang
openaire +1 more source
The Intelligent Design of Silicon Photonic Devices
Advanced Optical Materials, Volume 12, Issue 7, March 5, 2024.This review provides an overview of inverse design methods for silicon photonic devices. These methods have enabled the discovery of novel and highly efficient structures, including heuristic optimization, gradient optimizations, and deep learning‐based approaches.
Zean Li +13 more
wiley +1 more source
Cellular reflectarray antenna and method of making same [PDF]
, 2010 A method of manufacturing a cellular reflectarray antenna arranged in an m by n matrix of radiating elements for communication with a satellite includes steps of determining a delay .phi.m,n for each of said m by n matrix of elements of said cellular ...
Romanofsky, Robert R
core +2 more sources