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Radio Characteristics of Antennas
2021The tasks solved by antennas in radio systems are listed. The structure of electromagnetic fields excited by the antenna in the near and far zones is considered. The definitions of the internal and external parameters of transmitting and receiving antennas are given.
Vadim Serafimovich Kalashnikov +7 more
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IRE Transactions on Vehicular Communications, 1961
The trend toward personalizing vehicular radio sets has been accompanied by major engineering problems. Of these, one of the most challenging is that of designing an efficient antenna to occupy a small space. Due to these size limitations, personal radio antennas will be referred to as small antennas.
N. H. Shepherd, W. G. Chaney
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The trend toward personalizing vehicular radio sets has been accompanied by major engineering problems. Of these, one of the most challenging is that of designing an efficient antenna to occupy a small space. Due to these size limitations, personal radio antennas will be referred to as small antennas.
N. H. Shepherd, W. G. Chaney
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Journal of Lightwave Technology, 2019
Massive multiple input multiple output (mMIMO) enabled beamforming is a promising technology in the next generation of mobile communication. It allows multiple antennas transmit the same data to a user to improve the signal strength and quality. However,
Jiawei Zhang +4 more
semanticscholar +1 more source
Massive multiple input multiple output (mMIMO) enabled beamforming is a promising technology in the next generation of mobile communication. It allows multiple antennas transmit the same data to a user to improve the signal strength and quality. However,
Jiawei Zhang +4 more
semanticscholar +1 more source
Monostatic Antenna In-Band Full Duplex Radio: Performance Limits and Characterization
IEEE Transactions on Vehicular Technology, 2019This paper presents an in-band full duplex (IBFD) architecture, comprised of a monostatic antenna and software defined radio (SDR) implementing digital self-interference cancellation (DSIC).
Mikail Yilan +4 more
semanticscholar +1 more source
SAID Fiber-Antenna Radio Head at 50 GHz
European Microwave ConferencePlanar transmitting antennas with a direct photodiode (PD) connection for 50 GHz fiber-fed signal radiation are presented. The short asymmetrical inductive dipole (SAID) antenna enables independent adjustment of either the real and imaginary part of the ...
Sara Vega +7 more
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Introduction to radio and radio antennas
IEEE Spectrum, 1971Electromagnetic wave propagation is a simple and beautiful phenomenon, but its rigorous mathematical derivation from Maxwell's equations is formidable. This article makes many of the concepts visible and plausible using only mathematics available to college freshmen and taught today in most high schools.
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On antennas for Cognitive Radios
2011 XXXth URSI General Assembly and Scientific Symposium, 2011Cognitive Radios (CR) are a concept of radios endowed with an intelligence that allows them to perceive changes in their environment and adapt their parameters to maintain a quality of Service (QoS). While the parameters concerned by the adaptation enclose theoretically all of those of a radio (modulation, coding, …etc.), it is certainly the change of ...
F. Ghanem, M. H. Rijal, P. S. Hall
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Multiband Reconfigurable Filtering Monopole Antenna for Cognitive Radio Applications
IEEE Antennas and Wireless Propagation Letters, 2018A compact frequency-agile multiband filtenna is presented in this letter. The proposed reconfigurable filtering antenna performs independent switching between four operating bands viz.
Saffrine Kingsly +6 more
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Distributed Antennas for Indoor Radio Communications
IEEE Transactions on Communications, 1987The idea of implementing an indoor radio communications system serving an entire building from a single central antenna appears to be an attractive proposition. However, based on various indoor propagation measurements of the signal attenuation and the multipath delay spread, such a centralized approach appears to be limited to small buildings and to ...
Adel A. M. Saleh +2 more
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2009 Applied Electromagnetics Conference (AEMC), 2009
Radio Astronomy has made very significant contributions to human knowledge by discovering such exotic phenomena as quasars, pulsars, active galactic nuclei, superluminal motion and cosmic microwave background. These have been possible by the ever increasing sensitivity and angular resolution of the radio telescopes over the last six decades.
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Radio Astronomy has made very significant contributions to human knowledge by discovering such exotic phenomena as quasars, pulsars, active galactic nuclei, superluminal motion and cosmic microwave background. These have been possible by the ever increasing sensitivity and angular resolution of the radio telescopes over the last six decades.
openaire +1 more source