Results 201 to 210 of about 9,058 (257)
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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
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IEEE Transactions on Antennas and Propagation
This article introduces a compact dual circularly polarized (DCP) reflectarray antenna (RA) with independent focus and beam directions for satellite communication.
Sheng Gao +3 more
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This article introduces a compact dual circularly polarized (DCP) reflectarray antenna (RA) with independent focus and beam directions for satellite communication.
Sheng Gao +3 more
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Reflectarray Antenna at Terahertz Using Graphene
IEEE Antennas and Wireless Propagation Letters, 2013The use of graphene for fixed-beam reflectarray antennas at Terahertz (THz) is proposed. Graphene's unique electronic band structure leads to a complex surface conductivity at THz frequencies, which allows the propagation of very slow plasmonic modes. This leads to a drastic reduction of the electrical size of the array unit cell and thereby good array
Carrasco-Yepez Francisco-Eduardo +1 more
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IEEE Antennas and Wireless Propagation Letters
A novel low-cost 3-D-printed reflectarray is proposed based on a spatial phase-shifting technique. It consists of a layer of patches and a 3-D-printed underlayer covered by copper tape that acts as a ground plane.
Behrokh Beiranvand +2 more
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A novel low-cost 3-D-printed reflectarray is proposed based on a spatial phase-shifting technique. It consists of a layer of patches and a 3-D-printed underlayer covered by copper tape that acts as a ground plane.
Behrokh Beiranvand +2 more
semanticscholar +1 more source
1-bit Reflectarray Element Based on a Single Switch for Reconfigurable Reflectarrays
2019 Antennas Design and Measurement International Conference (ADMInC), 2019In this paper, we present a new reconfigurable element using p-i-n diode for reconfigurable reflectarray antennas. The element cell is realized using a single substrate, a ground plane and only a single p-i-n diode embedded in the element, hence very low complexity.
Quang Thang Tran, B.D. Nguyen
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IEEE Transactions on Antennas and Propagation, 2020
In this communication, an electronically reconfigurable folded reflectarray antenna (ERFRA), which includes $14 \times 14$ reflecting elements and features a fully planar compact configuration and wide-angle beam-scanning performance, was developed ...
Zhenglong Wang +8 more
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In this communication, an electronically reconfigurable folded reflectarray antenna (ERFRA), which includes $14 \times 14$ reflecting elements and features a fully planar compact configuration and wide-angle beam-scanning performance, was developed ...
Zhenglong Wang +8 more
semanticscholar +1 more source
Reflectarrays: Potentials and Challenges
2007 International Conference on Electromagnetics in Advanced Applications, 2007The paper gives an overview of research activities on reflectarrays. It revisits the original concept of reflectarray and describes how its realization evolved over the last three decades. Fixed-beam and electronically steered varieties of this antenna are considered.
Bialkowski, M.E., Encinar, J.
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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 ...
Saber H. Zainud-Deen +2 more
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Bandwidth study of microstrip reflectarray and a novel phased reflectarray concept
IEEE Antennas and Propagation Society International Symposium. 1995 Digest, 2002A microstrip reflectarray is a flat reflector antenna that can be conformally mounted onto its supporting structure without consuming a significant amount of real estate and without adding significant mass. The article concentrates on the bandwidth study of a form of reflectarray that uses identical patches with different-length transmission delay ...
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Microstrip patches for a reflectarray
IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010), 2003Microstrip patch element geometry is indeed an important factor in the design of a microstrip reflectarray. In essence, each of these perfectly conductive elements creates a minuscule correction to the reflection phase of the scattered field so that a phase coherent main beam is constructed.
K.Y. Sze, L. Shafai
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