Results 191 to 200 of about 9,058 (257)
Some of the next articles are maybe not open access.
A Reconfigurable Reflectarray Antenna With an 8 μm-Thick Layer of Liquid Crystal
IEEE Transactions on Antennas and Propagation, 2022This 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.
Wei-Quan Zhang, Yue Li, Zhijun Zhang
semanticscholar +1 more source
Advanced Optical Materials
Optically transparent electromagnetic devices play a key role in modern society. Traditional transparent electromagnetic devices face the problems of high return loss, low optical transparency, and dependence on the properties of transparent conductive ...
Chen-Xi Fan +5 more
semanticscholar +1 more source
Optically transparent electromagnetic devices play a key role in modern society. Traditional transparent electromagnetic devices face the problems of high return loss, low optical transparency, and dependence on the properties of transparent conductive ...
Chen-Xi Fan +5 more
semanticscholar +1 more source
A Wideband Circularly Polarized Folded Reflectarray Antenna With Linearly Polarized Feed
IEEE Antennas and Wireless Propagation Letters, 2022The design and implementation of a wideband circularly polarized folded reflectarray antenna (CPFRA) with a linearly polarized (LP) feed antenna is presented in this letter.
Pan-Pan Zhang +4 more
semanticscholar +1 more source
Genetic optimization of microstrip reflectarrays
IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2005Printed 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 +4 more
openaire +2 more sources
3-D-Printed All-Metal Conformal Circularly Polarized Reflectarray Antenna at X-Band
IEEE Transactions on Antennas and PropagationThis article presents a proposal for a 3-D-printed all-metal conformal circularly polarized (CP) reflectarray antenna operating in the X-band. The reflectarray element is constructed with a quasi-I-shaped arm with a pillar at the center as support.
Yifan Wang +3 more
semanticscholar +1 more source
A 10 240-Element Reconfigurable Reflectarray With Fast Steerable Monopulse Patterns
IEEE Transactions on Antennas and Propagation, 2021A large-scale 1-bit reconfigurable reflectarray with the feature of fast steerable monopulse patterns has been designed and tested at ${X}$ -band. The reflectarray element integrates one PIN diode to reconfigure the reflective phase between 0° and 180°.
Xiao-Tian Pan +3 more
semanticscholar +1 more source
Broadband Reflectarray Using Circular Cosine Curve Elements
IEEE Antennas and Wireless Propagation Letters, 2023An automated design methodology of large-aperture broadband reflectarray is proposed by exploiting the unique properties of circular cosine curve elements with the slope of frequency-phase (F-P) response that can be changed by adjusting two degrees of ...
Dong-Ping Su +5 more
semanticscholar +1 more source
A Highly Efficient 1-bit Reflectarray Antenna Using Electromagnet-Controlled Elements
IEEE Transactions on Antennas and PropagationA novel mechanically reconfigurable reflectarray element actuated by an electromagnet working in C-band is proposed. The 1-bit phase shift of reflecting wave is achieved by bending a half-wavelength dipole with magnetostatic force.
Ao Hu +3 more
semanticscholar +1 more source
2005 18th International Conference on Applied Electromagnetics and Communications, 2005
A study about switched beam reflectarrays has been carried out as a task on the Spanish project ARCO, to know the possibilities of this kind of antenna. The study has demonstrated that is possible to have a control of the radiation pattern by using switches on the reflector surface, and were studied different configurations in order to simplify ...
H. Palacios, J.E. Page, J. Vassal'lo
openaire +1 more source
A study about switched beam reflectarrays has been carried out as a task on the Spanish project ARCO, to know the possibilities of this kind of antenna. The study has demonstrated that is possible to have a control of the radiation pattern by using switches on the reflector surface, and were studied different configurations in order to simplify ...
H. Palacios, J.E. Page, J. Vassal'lo
openaire +1 more source
A Dual-Circularly Polarized Magneto-Electric Dipole Reflectarray With Independent Beam Control
IEEE Antennas and Wireless Propagation LettersA wideband dual-circularly polarized (dual-CP) magneto-electric dipole reflectarray with independent beam control is reported. A dual-CP phase shifting unit cell is proposed to provide independent phase manipulation on the two CP waves.
Xiao-Feng Xuan +5 more
semanticscholar +1 more source