Results 31 to 40 of about 533,787 (299)

Design of Microfluidic Reflectarray Elements for Multi-Reconfiguration Using Liquid Metal

IEEE Open Journal of Antennas and Propagation, 2022
Using an alloy of non-toxic liquid metal (Galinstan) is proposed to implement multi-reconfiguration in reflectarray elements. Reflectarray antennas are an interesting technology for dynamically controlling, simultaneously or individually, different ...
Eduardo Carrasco, Juan Gomez-Cruz, Mario Serrano-Berrueco, Carlos E. Saavedra, Carlos Escobedo   +4 more
doaj   +1 more source

Reflectarray Antennas printed on convex surfaces [PDF]

2015 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2015
The characteristics of Reflectarray Antennas printed on convex curved surfaces are discussed in this paper. In particular, results will be presented on the radiation performances of Reflectarrays designed to fit cylinders with different radii of curvature, and with different types of radiating elements.
Bui Van H.a., PIRINOLI, Paola, BECCARIA, MICHELE, OREFICE, Mario, Yang, F.   +4 more
openaire   +1 more source

Modified Phoenix cell for microstrip reflectarray antennas [PDF]

2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2012
This paper presents a modification on the structure of a recently proposed microstrip reflectarray cell, called Phoenix [4]. Phoenix cell was developed to operate in the X-band frequency range for a linearly polarized microstrip reflectarray antenna.
Ibrahim, Sarah, Hammad, Hany
openaire   +2 more sources

Radiation Analysis and Characteristics of Conformal Reflectarray Antennas

International Journal of Antennas and Propagation, 2012
This paper investigates the feasibility of designing reflectarray antennas on conformal surfaces. A generalized analysis approach is presented that can be applied to compute the radiation performance of conformal reflectarray antennas.
Payam Nayeri, Fan Yang, Atef Z. Elsherbeni   +2 more
doaj   +1 more source

A Reflectarray Antenna Using Hexagonal Lattice With Enhanced Beam Steering Capability

IEEE Access, 2019
This paper presents a novel reflectarray antenna with enhanced beam steering capability. The reflectarray antenna is based on the hexagonal distribution of the unit cells on the antenna surface.
Orcun Kiris, Kagan Topalli, Mehmet Unlu
doaj   +1 more source

Analysis and Experimental Demonstration of Reflectarray Antennas in Quasi-Regular Lattices

IEEE Open Journal of Antennas and Propagation, 2023
This paper presents investigations on reflectarray antennas using non-periodic element distributions. The study involves the analysis and design of two reflectarrays based on quasi-periodic lattices with rectangular and pentagonal profiles, whose ...
Borja Imaz-Lueje, Juan Corcoles, Marcos R. Pino, Manuel Arrebola   +3 more
doaj   +1 more source

Design and Analysis of Square and Torus ring Shaped Material - Unit cells for X-Band Reflectarray [PDF]

EPJ Web of Conferences
A Reflectarray antenna is considered a hybrid antenna fed with microstrip, and elements of the antenna are designed to comprise features of both reflector and phased array antennas.
Chitra S., Aishwarya L. K., Hema R., Sundararajan M.   +3 more
doaj   +1 more source

Improved thresholding and quantization techniques for image compression [PDF]

, 2017
In recent decades, digital images have become increasingly important. With many modern applications use image graphics extensively, it tends to burden both the storage and transmission process.
Dr. Muhammad Masruri, Dr. Muhammad Masruri, Dr. Riki Rahman, Dr. Riki Rahman, Dr. Siti Marpuah, Dr. Siti Marpuah, Husen Ismail,, Dr. Faisal, Kirin, Dr. Arwansyah, Wan Ainaa Mardhiah, Wan Ainaa Mardhiah   +5 more
core   +1 more source

Folded reflectarray antenna

Electronics Letters, 1998
A novel folded reflectarray antenna is presented. This antenna combines a twist and focusing reflector concept in a single printed structure. Together with a printed grid, a low profile and high gain antenna results. A test antenna in the 20 GHz range was designed, fabricated and tested.
D. Pilz, W. Menzel
openaire   +1 more source

Recent Developments of Reflectarray Antennas in Dual-Reflector Configurations

International Journal of Antennas and Propagation, 2012
Recent work on dual-reflector antennas involving reflectarrays is reviewed in this paper. Both dual-reflector antenna with a reflectarray subreflector and dual-reflectarrays antennas with flat or parabolic main reflectarray are considered.
Carolina Tienda, Manuel Arrebola, José A. Encinar   +2 more
doaj   +1 more source