Results 81 to 90 of about 3,668 (227)
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
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
Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS [PDF]
, 2012 Some of the most recent developments in reconfigurable reflectarrays using surface-mounted RF-MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper.
Arrebola Baena, Manuel +3 more
core +3 more sources
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
Millimeter Wave Beam Steering Reflectarray Antenna Based on Mechanical Rotation of Array
IEEE Access, 2019 This work provides design and analysis of a beam steering reflectarray antenna, designed at 26 GHz, based on the mechanical rotation of the array. Unit cells based on circular ring elements are designed, and scattering parameter measurements have been ...
Muhammad Inam Abbasi +5 more
doaj +1 more source
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
Three‐dimensional metal‐only phoenix cell and its application for reflectarrays
IET Microwaves, Antennas &Propagation, Volume 18, Issue 4, Page 211-219, April 2024.A 3D metal‐only waveguide‐based phoenix cell for reflectarray, offering two operation modes for reflection phase manipulation is presented. A metal‐only reflectarray antenna at 20 GHz is designed and fabricated using selective laser melting 3D printing technology, showing good agreement between simulations and measurements.
Zhihang An +4 more
wiley +1 more source
IEEE Open Journal of Antennas and PropagationThis work presents a reflectarray-based base station antenna to integrate both backhaul (BH) and fronthaul (FH). The reflectarray operates at 28 GHz in dual linear polarization, using one polarization for the BH and another for the FH. The BH is a pencil
Alvaro F. Vaquero +3 more
doaj +1 more source
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