Results 261 to 270 of about 179,089 (312)

Measurements at Radio Frequencies

Transactions of the American Institute of Electrical Engineers, 1940
IT IS interesting to recall that this art is less thana century old1 and that the early experimenters actually worked in the frequency range now called “hyper frequencies.”
Harry R. Meahl, P. C. Michel, M. W. Scheldorf, T. M. Dickinson   +3 more
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Radio Link Frequency Assignment

Constraints, 1999
The problem of radio frequency assignment is to provide communication channels from limited spectral resources whilst keeping to a minimum the interference suffered by those whishing to communicate in a given radio communication network. This problem is a combinatorial (NP-hard) optimization problem.
Cabon, Bertrand, de Givry, Simon, Lobjois, Lionel, Schiex, Thomas, Warners, Joost P.   +4 more
openaire   +2 more sources

Photonic radio frequency phase-shift amplification by radio frequency interferometry

Optics Letters, 2015
We present a new technique for radio frequency (RF) phase-shift amplification based on RF interferometry and demonstrate it in an optical system. A striking feature of this amplifier is that the input phase noise is not amplified together with the input phase signal, so the phase sensitivity improves with higher phase amplification.
Moshe Ben, Ayun, Arye, Schwarzbaum, Seva, Rosenberg, Monika, Pinchas, Shmuel, Sternklar   +4 more
openaire   +2 more sources

Sensitive radio-frequency relay

Journal of the A.I.E.E., 1924
The present paper has been prepared with a view of describing the theoretical properties, mechanical construction, and possible application of a new electron relay, invented and developed by Samuel Ruben, a physicist of New York. This relay has been developed to control currents as great as 5 amperes by means of extremely small operating currents of ...
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Radio Frequency Identification

2011
In this chapter, we will start by briefly summarizing the history of radio frequency identification systems. After that, we will introduce the components of such systems and classify them based on programmability, data capacity, frequency, and reading distance, as well as power supplement and reply transfer methods.
Róbert Schulcz, Gábor Varga
openaire   +1 more source

Radio Frequency Ablation

Journal of Diagnostic Medical Sonography, 2003
Radio frequency (RF) ablation is the latest and most promising treatment for nonsurgical cancer patients. This article will explain the history of how RF ablation was developed, moving us through the quest for larger ablations. It will take the reader step by step through the actual procedure; explain the different RF systems available; describe the ...
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RADIO‐FREQUENCY CARDIAC PACING

Annals of the New York Academy of Sciences, 1969
G, Grassi, L, Cammilli, C, Buttini, R, Pozzi   +3 more
openaire   +2 more sources

Endoscopic radio frequency electrosurgery

Gastrointestinal Endoscopy, 1990
R D, Tucker, C E, Sievert, J A, Vennes, S E, Silvis   +3 more
openaire   +2 more sources

Radio Frequency Communications

2001
RF communications is the only true wireless technology to connect high-speed communications to and throughout the home and to provide a network that is both portable and mobile. Several standards are in existence or are being created to accommodate the tremendous technology growth curve to provide higher data rates and more universal home networks ...
openaire   +1 more source