Results 31 to 40 of about 1,302,382 (255)

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, INDRA SURJATI, LYDIA SARI, JUSTIN TANUWIJAYA   +3 more
doaj   +1 more source

Hybrid Digital and Analog Beamforming Design for Large-Scale Antenna Arrays [PDF]

IEEE Journal on Selected Topics in Signal Processing, 2016
The potential of using of millimeter wave (mmWave) frequency for future wireless cellular communication systems has motivated the study of large-scale antenna arrays for achieving highly directional beamforming.
Foad Sohrabi, Wei Yu
semanticscholar   +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, Mohammad Tariqul Islam, Norbahiah Misran, Geri Gopir, Baharudin Yatim, Mhd Fairos Asillam   +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

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, Andrey N. Volobuev, Sergei V. Krasnov, Kaira A. Adyshirin-Zade, Tatyana A. Antipova, Natalia N. Aleksandrova   +5 more
doaj   +1 more source

A New Spatial Block-Correlation Model for Fluid Antenna Systems [PDF]

IEEE Transactions on Wireless Communications
Powered by position-flexible antennas, the emerging fluid antenna system (FAS) technology is postulated as a key enabler for massive connectivity in 6G networks. The free movement of antenna elements enables the opportunistic minimization of interference,
Pablo Ramírez-Espinosa, D. Morales-Jiménez, K. Wong   +2 more
semanticscholar   +1 more source

Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How It Works, State of Research, and The Road Ahead

IEEE Journal on Selected Areas in Communications, 2020
Reconfigurable intelligent surfaces (RISs) are an emerging transmission technology for application to wireless communications. RISs can be realized in different ways, which include (i) large arrays of inexpensive antennas that are usually spaced half of ...
M. Di Renzo, Alessio Zappone, M. Debbah, M. Alouini, Chau Yuen, J. de Rosny, S. Tretyakov   +6 more
semanticscholar   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Inverse Synthetic Aperture Radar Imaging of Space Objects Using Probing Signal with a Zero Autocorrelation Zone

Signals
To obtain radar images of a group of small space objects or to resolve individual elements of complex space objects in near-Earth orbit, a radar system must have high spatial resolution.
Roman N. Ipanov, Aleksey A. Komarov
doaj   +1 more source

A Broadband Planar Spiral Antenna Design for Electromagnetic Signal Monitoring

IEEE Access, 2020
In order to meet the wide-band full-space radio monitoring task, the design of a circular-polarized planar dual-arm composite spiral antenna is presented in this paper.
Daifu Chen, Hongxin Zhang, Jun Xu
doaj   +1 more source