Results 81 to 90 of about 1,317 (206)

PHASE-ONLY SYNTHESIS OF FLAT APERIODIC REFLECTARRAYS

, 2013
A phase-only power pattern synthesis technique for at (aperiodic) microstrip reflectarrays with elements arranged on a nonregular lattice is presented. The approach mitigates the typical design issues of reflectarray antennas related to the computational
LISENO, ANGELO, G Toso, G. Toso, CAPOZZOLI, AMEDEO, C Curcio, CURCIO, CLAUDIO, A Capozzoli, A Liseno   +7 more
core   +1 more source

Wideband, Beam-Steerable Reflectarrays Based on Minimum-Switch Topology, Polarization-Rotating Unit Cells

IEEE Access, 2019
We describe the results of a wideband, reconfigurable reflectarray concept based on polarization-rotating unit cells (PRUCs) with a minimum-switch topology design. To enhance the simplicity and decrease the cost, the approach focuses exclusively on a one-
Hung Luyen, Zongtang Zhang, John H. Booske, Nader Behdad   +3 more
doaj   +1 more source

Active Reflectors: Possible Solutions Based on Reflectarrays and Fresnel Reflectors

International Journal of Antennas and Propagation, 2009
An overview about some of the recent Spanish developments on active reflectors is presented. In the first part, a novel beamsteering active reflectarray is deeply studied. It is based on implementing in each elementary radiator an IQ modulator structure,
Lorena Cabria, José Ángel García, Julio Gutiérrez-Ríos, Antonio Tazón, Juan Vassal'lo   +4 more
doaj   +1 more source

Modified Minkowski Fractal Unit Cell for Reflectarrays with Low Sensitivity to Mutual Coupling Effects

International Journal of Antennas and Propagation, 2019
A single-layer miniaturized reflectarray element with low sensitivity to mutual coupling effects of surrounding elements is presented in this paper.
Sandra Costanzo, Francesca Venneri, Giuseppe Di Massa   +2 more
doaj   +1 more source

An Accurate and Efficient Design Tool for Large Contoured Beam Reflectarrays [PDF]

, 2012
An accurate and efficient tool for the design of contoured beam reflectarrays is presented. It is based on the Spectral Domain Method of Moments, the Local Periodicity approach, and a minimax optimization algorithm.
Breinbjerg, Olav, Sørensen, Stig B., Kim, Oleksiy S., Zhou, Min, Meincke, Peter, Jørgensen, Erik, Toso, Giovanni   +6 more
core  

VO₂-based ultra-reconfigurable intelligent reflective surface for 5G applications. [PDF]

Sci Rep, 2022
Matos R, Pala N.
europepmc   +1 more source

A Single-Layer Dual-Band Reflectarray Cell for 5G Communication Systems

International Journal of Antennas and Propagation, 2019
A single-layer dual-band reflectarray cell is proposed in this work for future 5G systems. A reflectarray unit cell operating at 28/38 GHz is designed by adopting two pairs of miniaturized fractal patches, offering low losses (
Sandra Costanzo, Francesca Venneri, Antonio Borgia, Giuseppe Di Massa   +3 more
doaj   +1 more source

True-Time-Delay Unit Cell for Ultra-Wideband Single- and Wideband Dual-Polarized Large Reflectarrays

IEEE Access
This paper presents the design and experimental validation of novel ultra-wideband true-time-delay (TTD) reflectarray unit cells for large-scale antenna applications. Two configurations are proposed: a single-polarized unit cell and a dual-polarized unit
Reza Shamsaee Malfajani, Karim Glatre, Jean-Jacques Laurin   +2 more
doaj   +1 more source

Dual-band and dual-polarized reflective Fresnel zone plate design based on Fractal shape. [PDF]

Sci Rep, 2023
Wei L, Ma C, Liu X, Ma H, Wu Y, Fan Z, Huangfu J.   +6 more
europepmc   +1 more source

A Printed Reflectarray with Annular Patches [PDF]

, 2007
Vietti Colome, G.C., M. Orefice, VIETTI, GUILLERMO CARLOS, P. Pirinoli, G.C. Vietti Colome, Pirinoli, Paola, G.L. Dassano, Orefice, Mario, Dassano, Gianluca   +8 more
core   +1 more source