Results 251 to 260 of about 109,932 (312)

VO₂-Graphene Terahertz Multifunctional Metasurface with Switchable Broadband Waveplates and Absorber. [PDF]

Nanomaterials (Basel)
Su H, Huang T, Liu G, Chen W, Zi J, Zhang C, Feng S, Zhang M, Li L, Liang H, Wang S.   +10 more
europepmc   +1 more source

The Design and Data Analysis of an Underwater Seismic Wave System. [PDF]

Sensors (Basel)
Xiao D, Zhu Q, Zhang J, Xie T, Ji Q.
europepmc   +1 more source

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Effect of Geophysical Disturbances on Ionospheric Radio Wave Propagation and Emergency Communication

IETE Journal of Research, 1977
Some results of a study of the effect of geophysical disturbance due to solar flares, thunderstorms and meteor showers on the ionospheric radio wave propagation characteristics in the entire frequency range of radio communication ranging from VLF to HF, are presented. The results reveal that a fadeout in one band may be accompanied by an enhancement or
A. K. Sen, S. K. Trehan, B. Saha, J. S. Sehra   +3 more
exaly   +2 more sources

Development of method to extend radio wave communication range under the sea

2014 IEEE International Conference on Systems, Man, and Cybernetics (SMC), 2014
Etsuro Shimizu
exaly   +2 more sources

Propagation Characteristics of Polarized Radio Waves in Cellular Communications

2007 IEEE 66th Vehicular Technology Conference, 2007
Narrowband and wideband measurements of the radio channel using different combinations of transmit and receive polarization have been performed. The measurements cover a range of scenarios including urban, suburban and open terrain, as well as both outdoor and indoor terminals.
Henrik Asplund, Jan-Erik Berg, Fredrik Harrysson, Jonas Medbo, Mathias Riback   +4 more
openaire   +1 more source

Radio Wave Propagation for Emerging Wireless Personal Communication Systems

IEEE Antennas and Propagation Magazine, 1994
The present survey paper summarizes radio-propagation measurements and models for emerging wireless personal-communication systems. Both indoor and microcell-propagation environments are considered, and the problem of RF penetration into buildings is identified as an important area of research for emerging wireless-communication systems. >
T.S. Rappaport, S. Sandhu
openaire   +1 more source

Characterization of radio wave propagation in tunnels for microcellular communications

2000 IEEE-APS Conference on Antennas and Propagation for Wireless Communications (Cat. No.00EX380), 2002
This work presents model-based characterization of wideband radio wave propagation in straight rectangular tunnel. The propagation characteristics are presented in time and frequency domains for both vertical and horizontal polarizations. Narrowband and wideband received power results are presented. The frequency of occurrence of fast fading depends on
H.M. El-Sallabi, J. Tervonen
openaire   +1 more source

Research on Test and Simulation of Radio Wave Communication in Indoor Corridor

2020 International Conference on Virtual Reality and Intelligent Systems (ICVRIS), 2020
In order to overcome the influence of complex and changeable spatial structure on wireless transmission signals in indoor environment, and to enhance consumers' experience of using radio wave communication indoors, this paper proposes a novel method to construct the test and simulation system of radio wave communication in indoor corridor.
Qin Zhongguang, Niu Zhenyi, Wang Bin, Yan Yongjin   +3 more
openaire   +1 more source

Radio wave propagation for mobile communication in high frequency

IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313), 2003
The Sun's electromagnetic radiation is a continuum that spans radio wavelengths through the infrared, visible, ultraviolet, x-ray, and beyond. Ultraviolet radiation, through a process termed photo ionization, interacts with upper atmospheric constituents to form an ionized layer called the ionosphere.
C.A. Tenorio de Carvalho, H. Tertuliano Filho   +1 more
openaire   +1 more source

Radio-Wave and Alternative Communications in the Arctic

ARCTIC, 1962
Discusses communication circuits in this region: major recent North American Arctic networks; relative performance of six circuit types, problems, and possible future networks. Submarine cable and tropospheric scatter are the most effective methods of communication for the Arctic. A submarine cable linking North America and Europe via Thule, Greenland,
openaire   +1 more source