Results 61 to 70 of about 3,668 (227)
Multifed Printed Reflectarray With Three Simultaneous Shaped Beams for LMDS Central Station Antenna [PDF]
, 2008 A two-layer reflectarray is proposed as a central station antenna for a local multipoint distribution system (LMDS) in the 24.5-26.5 GHz band. The antenna produces three independent beams in an alternate linear polarization that are shaped both in ...
Arrebola, Manuel +2 more
core +3 more sources
Single‐Layer Reflectarray Providing Broadband Linear‐to‐Circular Polarization Conversion
Microwave and Optical Technology Letters, Volume 67, Issue 2, February 2025.ABSTRACT This paper introduces a single‐layer reflectarray (RA) design capable of converting incoming linearly polarized waves into outgoing circularly polarized ones while focusing the beam. The design employs nonresonant unit cells, extending the classical concept of meander‐line polarizers.
Samara Gharbieh +4 more
wiley +1 more source
1‐Bit reconfigurable reflectarray antenna with T‐shaped parasitic structure
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.An electronically 1‐bit reconfigurable reflectarray antenna (RRA) with wide‐angle beam‐scanning and high efficiency performance is presented. A 180‐degree phase difference can be generated by controlling the state of the PIN dipole in the configurable element comprising a double split ring (DSR) patch and two T‐shaped parasitic structures.
Sen Li +6 more
wiley +1 more source
Multi-Beam Circular Polarized Reflectarray on Parabolic Reflector by Variable Rotation Technique
Applied Sciences, 2019 Multi-beams antennas are currently being used for direct broadcast satellite, personal communication satellite, military communication satellite, and high-speed internet applications.
Álvaro Somolinos +3 more
doaj +1 more source
Enhanced Efficiency and Reduced Side Lobe Level Convex Conformal Reflectarray
Applied Sciences, 2021 In this work, the design of a convex conformal reflectarray (CRA), suitable to be used for high gain on board antenna in mobile communication systems, is presented.
Michele Beccaria +7 more
doaj +1 more source
An Inhomogeneously‐Loaded Diaphragm in a Microwave Rectangular Waveguide
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.This study presents a method to control resonant transmission in a dielectric‐loaded slot within a thick conducting diaphragm embedded in a rectangular waveguide. By introducing a gap with a different dielectric constant, we can manipulate the overlap of Fabry–Perot and Fano resonances, demonstrating potential applications as a bandpass filter with a ...
Abdulaziz H. Haddab, Edward F. Kuester
wiley +1 more source
Fully Controllable Beam‐Steering 1‐THz Transmitarray Using Graphene–Metal Hybrid Metasurface
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.The switchable hybrid graphene–metal transmiting metasurface. The transmitarray composed of the proposed metasurface, for beam steering, controlable by a microprocessing unit. ABSTRACT In this paper, a 1‐THz graphene–metal‐hybrid transmissive metasurface is proposed, which consists of six layers.
P. Hosseini, H. Oraizi
wiley +1 more source
IEEE Access, 2019 A broadband single-layer reflectarray antenna comprising circular ring elements dented with sectorial slits is presented. The sizes of circular rings are fixed and equal for all elements, while the variation of the reflected phase is obtained by varying ...
Huiting Yu, Lu Guo
doaj +1 more source
, 2020 Recently there has been a flurry of research on the use of reconfigurable intelligent surfaces (RIS) in wireless networks to create smart radio environments.
ElMossallamy, Mohamed A. +5 more
core
Wide‐Angle Scanning Array With Sidelobe Reduction Using Single Substrate Layer
IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.Without the need for amplitude weighting, the proposed array can achieve beam scanning from −70° to 70° with a gain fluctuation of less than 0.8 dB while maintaining sidelobe levels below −11 dB. The proposed array has the advantages of simple structure, wide beam coverage, low gain fluctuation, and low sidelobe level.
Shang‐Yang Li +5 more
wiley +1 more source