Results 171 to 180 of about 9,058 (257)
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IEEE Transactions on Antennas and Propagation, 2021
A circularly polarized (CP) reflectarray with 2-D electronically steerable beam is reported. The reconfigurable CP reflectarray element is realized using a circular-patch-based structure with p-i-n diodes incorporated.
Fan Wu +5 more
semanticscholar +1 more source
A circularly polarized (CP) reflectarray with 2-D electronically steerable beam is reported. The reconfigurable CP reflectarray element is realized using a circular-patch-based structure with p-i-n diodes incorporated.
Fan Wu +5 more
semanticscholar +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
Single-Layer, Multimode OAM Reflectarray Antennas
IEEE Antennas and Wireless Propagation Letters, 2023In this letter, an innovative reflectarray (RA) antenna able to radiate in the same direction multiple orbital angular momentum (OAM) modes, is presented: depending on the direction of arrival of the impinging field, the RA radiates a broadside beam ...
M. Beccaria, G. Dassano, P. Pirinoli
semanticscholar +1 more source
Ultrabroadband and Multipolarized Electrically Reconfigurable Reflectarray Antennas
IEEE Transactions on Antennas and PropagationIn this article a general strategy for designing ultrabroadband and multipolarized electrically reconfigurable reflectarray antennas (RRAs) is proposed.
Jie Tian +5 more
semanticscholar +1 more source
A Single-Layered Broadband Reflectarray Employing 0.15-Wavelength Elements
IEEE Antennas and Wireless Propagation Letters, 2023A single-layered broadband reflectarray antenna employing 0.15-wavelength elements is proposed and investigated in this letter. The unit cell is constituted by a ring patch inserted with an interior concave arm and arranged in a grid size of 4.5 mm × 4.5
Meijin Guo +3 more
semanticscholar +1 more source
A 2-bit Dual-Channel Reconfigurable Reflectarray With Beam-Scanning Capability
IEEE Transactions on Antennas and PropagationFifth-generation (5G) communication systems require reconfigurable reflectarrays with multibit phase control and dual polarization regulation to facilitate flexible beam scanning and polarization matching between the transmitter and receiver.
Kun Duan +7 more
semanticscholar +1 more source
Single Motor-Controlled Mechanically Reconfigurable Reflectarray
IEEE Transactions on Antennas and Propagation, 2023In this article, a mechanically reconfigurable 1-D reflectarray actuated by a single motor is proposed. The elements are designed as metal tubes that are lifted by the ejectors.
Zhong-Yao Cao +3 more
semanticscholar +1 more source
Design of a 2-bit Dual-Polarized Reconfigurable Reflectarray With High Aperture Efficiency
IEEE Transactions on Antennas and PropagationIn this article, a dual-polarized 2-bit electronically reconfigurable reflectarray (RRA) is proposed for 5G beam scanning applications. By introducing two parallel transmission lines and a T-junction, only two p-i-n diodes are used to generate 2-bit ...
You-Jia Yin +6 more
semanticscholar +1 more source
IEEE Transactions on Antennas and Propagation
This article presents a low-scattering and dual-polarized reconfigurable reflectarray antenna (RRA). The whole reflectarray comprises an active coding metasurface cascaded with an absorptive metasurface above. Upon integration with p-i-n diodes, the unit
Kun Duan +5 more
semanticscholar +1 more source
This article presents a low-scattering and dual-polarized reconfigurable reflectarray antenna (RRA). The whole reflectarray comprises an active coding metasurface cascaded with an absorptive metasurface above. Upon integration with p-i-n diodes, the unit
Kun Duan +5 more
semanticscholar +1 more source
IEEE Transactions on Antennas and Propagation, 2023
This work presents the optimization of a dual circular-polarized (CP) shaped-beam reflectarray with improved performance. To that end, the design methodology leverages surrogate models based on support vector regression (SVR) of the electromagnetic ...
D. R. Prado +4 more
semanticscholar +1 more source
This work presents the optimization of a dual circular-polarized (CP) shaped-beam reflectarray with improved performance. To that end, the design methodology leverages surrogate models based on support vector regression (SVR) of the electromagnetic ...
D. R. Prado +4 more
semanticscholar +1 more source