Results 181 to 190 of about 14,076 (241)

Full-space trifunctional metasurface with independent control of amplitude and phase for circularly polarized waves. [PDF]

Nanophotonics
Li XM, Zhao Y, Lu RP, Sun XF, Yang Z, He HD, Liu YH, Du GH.   +7 more
europepmc   +1 more source

CORE-VTRCC Cruise Report: Geophysical Acquisition and Seafloor Sampling along the Vitória-Trindade Ridge. [PDF]

Sci Data
Tagliaro G, Gama MAC, Britzke AN, Louro VHA, Bauli P, Patines GC, Bonifatto GD, Vieira ACB, Silva BBS, Boni GC, Pantoja LK, Sergipe PP, Silva RS, Dos Santos SA, Caram TN, Pereira TLF, Jovane L.   +16 more
europepmc   +1 more source

Preconditioning of sediment failure by astronomically paced weak-layer deposition. [PDF]

Nat Commun
Wang X, Maselli V, Flessati L, Wang H, Sun Z, Wang Q, Chen J, Li Q, Alberti S, Kienast M, Xie S, Sun Q.   +11 more
europepmc   +1 more source

Formation of breccia pipes associated with a hydrogen-rich hydrothermal system on the east Caroline plate in the West Pacific. [PDF]

Sci Adv
Xiao Y, Wang K, Wang Y, Yuan S, Zhang H, Zhang T, Li C, Ren A, Xie G, Kamenetsky VS, Xie H, Tong F, Wei S, Sun W.   +13 more
europepmc   +1 more source

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Multibeam and multipolarization antenna

2006 First European Conference on Antennas and Propagation, 2006
The design of a novel reconfigurable antenna for MIMO systems is presented. Simulation and experimental results shows its capabilities in a multibeam reconfiguration in a 4? steradians environment. It can allow an enhancement in wireless communication employing multipath channel combining with a radiation pattern diversity.
Sarrazin, Julien, Mahé, Yann, Avrillon, Stéphane, Toutain, Serge   +3 more
openaire   +2 more sources

A spherical multibeam antenna

IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450), 2004
One of the most difficult problems in scanning antenna technology is the realization of wide angle scanning. The proposed architecture seems to overcome the difficulties of realizing complex antennas, and offers high efficiency with wide-angle scanning capabiliy and with (almost) indentical beams regardless of scanning angle.
Herscovici, Naftali, Šipuš, Zvonimir
openaire   +2 more sources

Multibeam Antenna in Millimeter Waves

32nd European Microwave Conference, 2002, 2002
This paper deals with a multibeam antenna in 60 GHz band. This structure is based on a Butler Matrix which fed a four printed antenna array. Two different solutions are presented to avoid the crossing point of the microstrip line : a microstrip-thick slot-microstrip transition or two hybrids 90°.
Lafond, Olivier, Himdi, Mohamed
openaire   +2 more sources

Multibeam coupling in photorefractive SBN:Ce

Optics Letters, 1988
Theoretical and experimental results are presented for simultaneous multibeam coupling in photorefractive SBN:Ce. Within a single crystal, multiple signals are amplified through a coupling process that employs a single pump. The coupling gain of each signal results from coupling both between the pump and the signal and between different signals.
J, Ma, L, Liu, S, Wu, Z, Wang, L, Xu, B, Shu   +5 more
openaire   +2 more sources

Scheduling in Multibeam Satellites with Interfering Zones

IEEE Transactions on Communications, 1983
In this paper we study the traffic scheduling problem in an SS/TDMA system with interfering beams. We investigate a twostep approach, the first step being the assignment of orthogonal polarization to reduce the interference, and the second step being the scheduling of traffic, taking into account the "resultant" interference. The first step we show can
GOPAL IS, BONUCCELLI, MAURIZIO ANGELO, WONG CK   +2 more
openaire   +2 more sources