Results 31 to 40 of about 289,146 (351)
A Multioctave 8 GHz
IEEE Journal of Microwaves, 2023 Accurate measurement of angular positions on the sky requires a well-defined system of reference, something that in practice is realized by the International Celestial Reference Frame (ICRF) with observations of distant (typical redshift $\sim$1) Active ...
Jacob W. Kooi +17 more
doaj +1 more source
Dual Circularly Polarized Reflectarray With Independent Control of Polarizations [PDF]
IEEE Transactions on Antennas and Propagation, 2015 A reflectarray with independent dual-circular polarizations is proposed for the first time. The reflector panel operates in X-band and contains 97 unit-cells. It is made with a lego-type configuration allowing change manually the phase aperture distribution and demonstrating experimentally the independence of both polarizations in the same frequency ...
Mener, Simon +4 more
openaire +2 more sources
Fully Planar Dual-Polarized Broadband Antenna for 3G, 4G and Sub 6-GHz 5G Base Stations
IEEE Access, 2020 A fully planar dual polarized radiating element with internal embedded coupled dipoles is presented in this paper. The inclusion of these elements allows achieving three different goals: firstly, an extension of the bandwidth towards lower frequencies ...
Sergio Martin-Anton +1 more
doaj +1 more source
Dual-polarized UWB antenna array
2009 IEEE International Conference on Ultra-Wideband, 2009 The paper describes a dual-polarized antenna array for Impulse Radio Ultra Wideband (IR-UWB) applications. Firstly a brief description of the single radiator is given. Next the prototype is presented and measured data is compared with the simulated one. The linear array consisting of four components achieves a very narrow mean 3 dB beam width, which is
Adamiuk, G. +3 more
openaire +3 more sources
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
doaj +1 more source
A universal optical all-fiber omnipolarizer [PDF]
, 2012 Wherever the polarization properties of a light beam are of concern, polarizers and polarizing beamsplitters (PBS) are indispensable devices in linear-, nonlinear-and quantum-optical schemes.
A., Picozzi +9 more
core +1 more source
Polarization switchable two-color plasmonic nano-pixels for creating optical surfaces encoded with dual information states [PDF]
, 2016 We demonstrate tunable, polarization-dependent, dual-color plasmonic filters based upon arrays of asymmetric cross-shaped nano-apertures. Acting as individual color emitting nano-pixels, each aperture can selectively transmit one of 2 colors, switched by
Clark, Alasdair W. +3 more
core +1 more source
Analysis of Seeing-Induced Polarization Cross-Talk and Modulation Scheme Performance
, 2012 We analyze the generation of polarization cross-talk in Stokes polarimeters by atmospheric seeing, and its effects on the noise statistics of spectropolarimetric measurements for both single-beam and dual-beam instruments.
Casini, Roberto +2 more
core +1 more source
Experimental study of depolarization and antenna correlation in tunnels in the 1.3 GHz band [PDF]
, 2019 Measurements have been carried out in a low-traffic road tunnel to investigate the influence of the polarization of the transmitting and receiving antennas on the channel characteristics. A real-time channel sounder working in a frequency band around 1.3
Challita, Frederic +5 more
core +3 more sources
Mechanisms of IgE‐mediated food allergy and the role of allergen‐specific B cells
FEBS Letters, EarlyView.Food allergy arises when allergen‐specific B cells preferentially produce immunoglobulin E (IgE) antibodies against harmless foods. This article explains the mechanisms driving IgE‐mediated reactions, highlights the central role of these B cells, and discusses how natural tolerance (NT) and oral immunotherapy (OIT) can reshape allergic immune responses.
Juan‐Felipe López +2 more
wiley +1 more source