Results 191 to 200 of about 10,722 (267)

Support Vector Regression-Enabled Optimization Strategy of Dual Circularly-Polarized Shaped-Beam Reflectarray With Improved Cross- Polarization Performance

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, Parinaz Naseri, J. A. López-Fernández, S. Hum, M. Arrebola   +4 more
semanticscholar   +1 more source

A Circularly Polarized 1 Bit Electronically Reconfigurable Reflectarray Based on Electromagnetic Element Rotation

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, Rong Lu, Jingxue Wang, Z. Jiang, W. Hong, K. Luk   +5 more
semanticscholar   +1 more source

Design of a 2-bit Dual-Polarized Reconfigurable Reflectarray With High Aperture Efficiency

IEEE Transactions on Antennas and Propagation
In 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 ...
Youjia Yin, Changjiang Deng, Xiaowei Cao, Yinan Hao, Yuefeng Hou, Hongjing Xu, K. Sarabandi   +6 more
semanticscholar   +1 more source

Single Motor-Controlled Mechanically Reconfigurable Reflectarray

IEEE Transactions on Antennas and Propagation, 2023
In 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.
Zhongyao Cao, Yue Li, Zhijun Zhang, M. Iskander   +3 more
semanticscholar   +1 more source

Low-Scattering and Dual-Polarized Reconfigurable Reflectarray Antenna Based on Absorptive and Active Coding Metasurfaces

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, Ke Chen, Yilin Zheng, T. Jiang, Junming Zhao, Yijun Feng   +5 more
semanticscholar   +1 more source

Genetic optimization of microstrip reflectarrays

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2005
Printed reflectarrays try to combine the advantages of both reflectors and printed arrays (see e.g. [l]) and consist in arrays of printed patches, illuminated by a primary feed horn, that re-radiate the illuminating power back into the space. Since the elements have different positions, the field that propagates from the feed to the patches covers ...
ZICH, RICCARDO, MUSSETTA, MARCO, TOVAGLIERI M, PIRINOLI P, OREFICE M.   +4 more
openaire   +2 more sources

Wideband, Beam-Steerable Reflectarray Antennas Exploiting Electronically Reconfigurable Polarization-Rotating Phase Shifters

IEEE Transactions on Antennas and Propagation, 2022
We present a wideband reflectarray antenna with electronic beam-steering capability. The beam-steerable reflectarray uses an electronically reconfigurable polarization-rotating unit cell (PRUC) that acts as a wideband 1 bit phase shifter.
H. Luyen, Zongtang Zhang, J. Booske, N. Behdad   +3 more
semanticscholar   +1 more source

A 265-GHz CMOS Reflectarray With 98×98 Elements for 1°-Wide Beam Forming and High-Angular-Resolution Radar Imaging

IEEE Journal of Solid-State Circuits
The high-angular-resolution imaging capability of future automotive and security sensing systems is in favor of compact, fully integrated, and reconfigurable antenna arrays.
Xibi Chen, Nathan M. Monroe, G. Dogiamis, Robert Stingel, Preston Myers, Ruonan Han   +5 more
semanticscholar   +1 more source

A Reconfigurable Reflectarray Antenna With an 8 μm-Thick Layer of Liquid Crystal

IEEE Transactions on Antennas and Propagation, 2022
This article demonstrates an electronically scanned reflectarray antenna based on liquid crystal (LC). The LC-based reflectarray element was designed as a periodically loading of parallel H-shaped polygons on two metal layers.
Weiquan Zhang, Yue Li, Zhijun Zhang
semanticscholar   +1 more source

Printed millimeter-wave reflectarrays

Annales Des Télécommunications, 2001
Des structures periodiques et quasi-periodiques, imprimees sur un substrat dielectrique peuvent etre employees pour commander les proprietes de reflexion et de transmission des ondes incidentes en fonction de la structure geometrique. Ceci peut etre realise pratiquement independamment pour les deux polarisations.
Dietmar Pilz, Wolfgang Menzel
openaire   +1 more source