Results 21 to 30 of about 210,822 (303)
CREATION AND APPROBATION OF A LOW-FREQUENCY RADIO ASTRONOMY ANTENNA FOR STUDIES OF OBJECTS OF THE UNIVERSE FROM THE MOON'S FARSIDE [PDF]
Radio Physics and Radio Astronomy, 2021 Purpose: Theoretical and experimental studies of the active antenna – an element of the low-frequency radio telescope antenna array for the future observatory on the farside of the Moon.
I. N. Bubnov +5 more
doaj +1 more source
Energy efficiency of transmit diversity systems under a realistic power consumption model [PDF]
, 2013 We compare the downlink energy efficiency of spatial diversity multiple transmit antenna schemes. We determine the minimum required transmit power for a given outage probability.
Brante, G. +3 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
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
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
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
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
User Interface and RF-Front End Design for Radio Direction Finding-Miniature Unmanned Air Vehicles (RDF-MUAV) [PDF]
, 2020 Radio direction finding perform better at high altitude due to greater line of sight coverage. In this paper, the radio direction finding-miniature unmanned air vehicles (RDF-MUAVs) platform able to localize the beacon by accessing the direction of ...
A. Majid, Huda +3 more
core +1 more source
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
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