Results 21 to 30 of about 41,794 (261)
Dual-band and high-efficiency metasurface-based circular-to-linear polarization converter.
PLoS ONE, 2023 In this paper, to achieve circular-to-linear polarization conversion, a novel polarization converter based on an anisotropic metasurface is proposed.
Baoqin Lin +5 more
doaj +1 more source
Circular Polarization in Scintillating Sources [PDF]
Symposium - International Astronomical Union, 2001 We discuss the detection of variable circular polarization (CP) in several scintillating radio sources: PKS 1519-273, PKS 0405-385 and Sgr A*. In all cases the CP is variable, with the fractional variability in the CP greatly exceeding that in total intensity.
Macquart, J +4 more
openaire +2 more sources
Circular Polarization Laser Output Through Magnetic Switch
IEEE Access, 2019 In order to obtain an integrated structure achieving controllable circular polarization and laser output at 1310 nm, the gain and loss microcavities, magnetic microcavity, and metal layers are used to form a compound structure system, and the 4 × ...
Xiaoxue Li, Rongkun Ma, Yuntuan Fang
doaj +1 more source
THE CIRCULAR POLARIZATION OF SAGITTARIUS A* AT SUBMILLIMETER WAVELENGTHS [PDF]
The Astrophysical Journal, 2012 We report the first detections of circularly polarized emission at submillimeter wavelengths from the compact radio source and supermassive black hole candidate Sgr A* at a level of 1.2\pm0.3% at 1.3 mm wavelength (230 GHz) and 1.6\pm0.3% at 860 microns (345 GHz) with the same handedness as observed at lower frequencies (1.4-15 GHz).
Muñoz, D. J. +3 more
openaire +5 more sources
Fusion of polarimetric channel information of PALSAR data for land cover classification
Geomatics, Natural Hazards & Risk, 2014 Fully polarimetric radars are capable of preserving detailed information about the targets because of the amplitude and phase information they contain which helps in distinguishing different scattering mechanisms.
Gunjan Mittal +2 more
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A Wideband Quad-Polarization Reconfigurable Metasurface Antenna
IEEE Access, 2018 A low-profile wideband metasurface antenna with quad-polarization reconfiguration ability is presented in this paper. The proposed metasurface antenna is composed of a square patch, a metasurface formed by a lattice of 4 × 4 periodic metal plates,
Jun Hu, Guo Qing Luo, Zhang-Cheng Hao
doaj +1 more source
A Microstrip Antenna Achieves Dual Polarization Conversion by Rotating Metasurface
IEEE AccessTo expand the channel capacity of a traditional single-polarization reconfigurable antenna, a design method for a dual-polarization reconfigurable microstrip antenna loaded with a passive metasurface was proposed.
Bo Wu +6 more
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Enhanced THz Circular-Polarization Detection in Miniaturized Chips with Chiral Antennas
PhotonicsRecent advancements in terahertz (THz) wave technology have highlighted the criticality of circular-polarization detection, fostering the development of more compact, efficient on-chip THz circular-polarization detectors.
Fangzhe Li +10 more
doaj +1 more source
Tunable square waveguide polarizer with irises and posts
Технічна інженерія, 2020 Polarization signal processing is widely used in modern information and telecommunication systems for various purposes. Signal polarization processing is carried out in polarization-adaptive antenna systems.
А.V. Bulashenko +3 more
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First M87 Event Horizon Telescope Results. IX. Detection of Near-horizon Circular Polarization
The Astrophysical Journal Letters, 2023 Event Horizon Telescope (EHT) observations have revealed a bright ring of emission around the supermassive black hole at the center of the M87 galaxy. EHT images in linear polarization have further identified a coherent spiral pattern around the black ...
The Event Horizon Telescope Collaboration +283 more
doaj +1 more source