Results 21 to 30 of about 205,865 (354)
Foldable all-textile cavity-backed slot antennas for personal UWB localization [PDF]
, 2020 An all-textile multimoded cavity-backed slot antenna has been designed and fabricated for body-worn impulse radio ultra-wideband (IR-UWB) operation in the 3,744-4,742.4 MHz frequency band, thereby covering Channels 2 and 3 of the IEEE 802.15.4a standard.
Lemey, Sam +4 more
core +1 more source
Impact of Ship Motions on Maritime Radio Links
International Journal of Antennas and Propagation, 2012 The improvement of maritime radio links often requires an increase of emitted power or receiver sensitivity. Another way is to replace the poor antenna gains of traditional surface ship whips by novel antenna structures with directive properties. However,
William Hubert +3 more
doaj +1 more source
Antena Mikrostrip Array 8x2 Elemen untuk Aplikasi Radio Gelombang Mikro
Jurnal Elkomika, 2021 ABSTRAK Peningkatan gain pada antena mikrostrip polarisasi melingkar menggunakan metode array 8x2 element diusulkan dalam penelitian ini. Antena yang diusulkan dirancang untuk bekerja pada rentang frekuensi 10700 – 11700 MHz untuk sistem komunikasi ...
SYAH ALAM +3 more
doaj +1 more source
Nature Communications, 2020 Designing efficient radio frequency antenna for wireless stretchable multifunction electronics remains a challenge. Here, the authors present epidermal radio frequency antenna based on silver nanofibers network for wireless power transfer and information
Yufei Zhang +10 more
doaj +1 more source
ON THE “TREE” VERTICAL ELECTRIC ELF ANTENNA [PDF]
Радиофизика и электроника, 2016 Development of new antennas for reception of radio signals was and remains an actual problem. We model and estimate the efficiency of unusual design of the vertical electric antenna detecting ELF (3…3 000 Hz) radio signals.
E. A. Velichko, A. P. Nickolaenko
doaj +1 more source
Flickering of a radio-signal due to an atmospheric turbulence
Физика волновых процессов и радиотехнические системы, 2023 Background. Turbulent fluctuations of the refractive index in the atmosphere lead to distortions during the passage of the radio signal. This can lead to distortion of the transmitted information due to the resulting fluctuations of the amplitude, phase ...
Dmitriy S. Klyuev +5 more
doaj +1 more source
Radio Direction Finding in Air Traffic Services
Promet (Zagreb), 2005 The paper analyses the Radio Direction Finding principlefor navigation and swveillance system. Radio Direction Findinginvolves locating the bearing of a transmitter called a radiobeacon.
Andrej Novak
doaj +1 more source
A Chip Antenna in LTCC for UWB Radios [PDF]
IEEE Transactions on Antennas and Propagation, 2008 The correspondence presents a chip antenna for ultrawide- band (UWB) radios. The chip antenna is realized with a simple radiating element and small ground plane in low temperature cofired ceramic (LTCC) technology. The chip antenna has size 17 X 8 X 0.8 mm3 and achieves impedance bandwidth from 3.75 to 10.45 GHz and gain from - 2 to 2.3 dBi over this ...
Sun, Mei, Zhang, Yue Ping
openaire +4 more sources
Effect of Parasitic Element on 408 MHz Antenna for Radio Astronomy Application
International Journal of Antennas and Propagation, 2014 Antenna is one of the important subsystem components in a radio telescope system. In this paper, analysis on the effect of parasitic element on 408 MHz antenna in a radio telescope system is presented.
Radial Anwar +5 more
doaj +1 more source
Antenna design for underwater radio communications [PDF]
OCEANS 2016 - Shanghai, 2016 In this paper we assess the influence of the conductivity of the medium on the radiation characteristics and input impedance of a loop antenna designed for underwater communications. The initial study is based on simulation of the antenna characteristics using FEKO electromagnetic (EM) software.
Inacio, S. I. +7 more
openaire +2 more sources