Results 161 to 170 of about 5,646 (202)
Some of the next articles are maybe not open access.
Aperiodic conformal reflectarrays
2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011We introduce a new class of reflectarrays, namely, the aperiodic conformal reflectarrays, aimed at exploiting, as much as possible, the available degrees of freedom of the radiating structure, such as positions, orientations and characteristics of the radiating elements and the shape of the reflecting surface.
CAPOZZOLI, AMEDEO +4 more
openaire +2 more sources
2005 18th International Conference on Applied Electromagnetics and Communications, 2005
A study about switched beam reflectarrays has been carried out as a task on the Spanish project ARCO, to know the possibilities of this kind of antenna. The study has demonstrated that is possible to have a control of the radiation pattern by using switches on the reflector surface, and were studied different configurations in order to simplify ...
H. Palacios, J.E. Page, J. Vassal'lo
openaire +1 more source
A study about switched beam reflectarrays has been carried out as a task on the Spanish project ARCO, to know the possibilities of this kind of antenna. The study has demonstrated that is possible to have a control of the radiation pattern by using switches on the reflector surface, and were studied different configurations in order to simplify ...
H. Palacios, J.E. Page, J. Vassal'lo
openaire +1 more source
2006 IEEE Antennas and Propagation Society International Symposium, 2006
A simple sub-millimeter infrared reflectarray (SMIR) has been successfully fabricated and tested at 10.6 mum. The SMIR is comprised of three independent arrays or "stripes" of a single size element on a coated optical flat. Actual reflectarray elements consist of variable size patches which exhibit higher operating bandwidths than reflectarrays ...
J.C. Ginn, B.A. Lail, G.D. Boreman
openaire +1 more source
A simple sub-millimeter infrared reflectarray (SMIR) has been successfully fabricated and tested at 10.6 mum. The SMIR is comprised of three independent arrays or "stripes" of a single size element on a coated optical flat. Actual reflectarray elements consist of variable size patches which exhibit higher operating bandwidths than reflectarrays ...
J.C. Ginn, B.A. Lail, G.D. Boreman
openaire +1 more source
A Reconfigurable Origami Reflectarray
2020 14th European Conference on Antennas and Propagation (EuCAP), 2020This paper presents a novel Miura-Ori origami reflectarray unit-cell. This origami inspired unit-cell allows efficient folding\unfolding, high packing efficiency, easy deployment and frequency reconfigurable behavior. The unitcell is composed of 4 parallelogram patches that can achieve 560° phase shift.
Abdul-Sattar Kaddour +2 more
openaire +1 more source
Frequency Tunable Graphene Metamaterial Reflectarray
Wireless Personal Communications, 2017In this paper, the radiation characteristics of frequency tunable graphene based metamaterial reflectarray have been investigated. The unit-cell consists of graphene two gaps split-ring-resonator (SRR) printed on a thick SiO2 substrate. The metamaterial parameters of the unit-cell have been calculated at different graphene chemical potentials and ...
S. H. Zainud-Deen +2 more
openaire +1 more source
Wideband conformal reflectarrays: Preliminary analysis
2014 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2014In this paper, some preliminary results on conformal reflectarray antennas are presented. In particular, the effects introduced by the curvature on the phase of the re-radiated field variation vs. the reflectarray unit cell geometrical parameters have been considered.
Bui, V. H. +3 more
openaire +1 more source
IEEE Transactions on Antennas and Propagation, 1963
A class of antennas that utilizes arrays of elementary antennas as reflecting surfaces has been investigated. An antenna of this type is here called a Reflectarray. It has been found that the Reflectarray combines much of the simplicity of the reflector-type antenna with the performance versatility of the array type. The reflecting surfaces employed in
D. Berry, R. Malech, W. Kennedy
openaire +1 more source
A class of antennas that utilizes arrays of elementary antennas as reflecting surfaces has been investigated. An antenna of this type is here called a Reflectarray. It has been found that the Reflectarray combines much of the simplicity of the reflector-type antenna with the performance versatility of the array type. The reflecting surfaces employed in
D. Berry, R. Malech, W. Kennedy
openaire +1 more source
Planar infrared binary phase reflectarray
Optics Letters, 2008A reflective, binary phase reflectarray is demonstrated in the infrared, at a wavelength of 10.6 microm. The unique aspect of this work, at this frequency band, is that the specific desired phase shift is achieved using an array of subwavelength metallic patches on top of a ground-plane-backed dielectric stand-off layer.
Ginn, James +3 more
openaire +3 more sources
Dualband Stacked Metasurface Reflectarray
2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, 2020A reflectarray antenna operating at two distinct frequencies is reported. The antenna consists of two metasurfaces (subwavelength patterned metallic claddings) above a ground plane, separated by dielectric substrates. The metasurfaces are homogenized and the reflectarray is designed using a system of coupled volume-surface integral equations.
Jordan Budhu +2 more
openaire +1 more source
2017 International Conference on Electromagnetics in Advanced Applications (ICEAA), 2017
The process of reflectarray antenna design can be usually carried out into two separate steps: element design and aperture phase distribution design. In the step of element design, reflectarray elements need to be devised based on the requirements of phase range, element bandwidth, polarization and so on.
Shi-Wei Qu, Geng-Bo Wu
openaire +1 more source
The process of reflectarray antenna design can be usually carried out into two separate steps: element design and aperture phase distribution design. In the step of element design, reflectarray elements need to be devised based on the requirements of phase range, element bandwidth, polarization and so on.
Shi-Wei Qu, Geng-Bo Wu
openaire +1 more source