Results 11 to 20 of about 1,317 (206)
Polarization Diversity and Adaptive Beamsteering for 5G Reflectarrays: A Review [PDF]
IEEE Access, 2018 The growing demands of advanced future communication technologies require investigating the possible enhancement in the current features of a reflectarray antenna.
Muhammad Hashim Dahri +5 more
doaj +4 more sources
Bandwidth Performances of Reconfigurable Reflectarrays: State of Art and Future Challenges [PDF]
Radioengineering, 2018 Reconfigurable antennas allow to meet the increasing demands of modern RF communication systems for reconfiguration capabilities, such as beam-steering, multi-band operation, polarization flexibility or frequency agility.
S. Costanzo +4 more
doaj +2 more sources
A simple and fast technique to analyze accurately reconfigurable reflectarrays [PDF]
, 2012 International audienceA simple and fast technique is proposed and validated to analyze reconfigurable reflectarrays. This technique takes into account mutual coupling effects between active cells within the array.
Martinaud, Jean-Paul +4 more
core +9 more sources
IEEE Open Journal of Antennas and Propagation, 2023 The feed for reflectarrays and transmitarrays is crucial for determining the overall antenna aperture efficiency, gain, and power handling. In the past, several methods, such as altering the horn shape to achieve higher modes, have been employed to ...
Eric B. Whiting +6 more
doaj +1 more source
A Low Profile Planar Dual-Polarized Tightly Coupled Dipole Reflectarray With 5:1 Bandwidth
IEEE Open Journal of Antennas and Propagation, 2022 This work introduces an extremely low profile ( $0.4\lambda _{high}$ ) planar ultra-wideband dual-polarized reflectarray. The unit-cell structure of the array is modular in nature, and without any electrical connection between adjacent unit-cells.
Muhammad Hamza +2 more
doaj +1 more source
Rapid Design of 3D Reflectarray Antennas by Inverse Surrogate Modeling and Regularization
IEEE Access, 2023 Reflectarrays (RAs) exhibit important advantages over conventional antenna arrays, especially in terms of realizing pencil-beam patterns without the employment of the feeding networks.
Slawomir Koziel +3 more
doaj +1 more source
A 1-Bit Coding Metasurface With Polarization Conversion in X-Band
Frontiers in Materials, 2022 Polarization conversion metasurfaces are widely used in optical devices, microwave devices and communication systems, owing to their unique polarization modulation characteristics.
Wen Hua Gao +3 more
doaj +1 more source
Terahertz Beam Steering Using a MEMS-Based Reflectarray Configured by a Genetic Algorithm
IEEE Access, 2022 With the increase in potential uses of terahertz technology, the need for terahertz transceivers with application-oriented adaptive radiation patterns has emerged.
Xuan Liu +10 more
doaj +1 more source
Tunable Reflectarrays and Metasurfaces [PDF]
, 2022 Fifth-generation (5G) wireless communication networks have been rapidly expanding in recent years. However, due to the higher frequency bands used in 5G applications compared with previous generations, it is more difficult for electromagnetic waves to ...
Zhang, Peng
core
A Dual Circularly-Polarized Multilayer Reflective Surface Based on Loaded Ring Slots
IEEE Access, 2021 In this paper, a dual circularly-polarized multilayer reflective surface (MRS) based on loaded ring-slots for reflectarray applications is presented. The MRS comprises a wideband multilayer circular polarizer cascaded with a multilayer reflective screen ...
Lourdes Martinez-Lopez +4 more
doaj +1 more source