Results 241 to 250 of about 248,313 (294)
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Radio Frequency (RF) Discharge Lamps
2020This chapter guides the reader through a brief historical view of discharge lamps, especially RF discharge lamps, from their first accounts in the late nineteenth century until novel developments. Some principles of novel lamp technologies are explained, and their advantages pointed out in several special applications apart from the well-known general ...
Stephan Holtrup +2 more
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Radio frequency (RF) metamaterials
physica status solidi (b), 2007AbstractBy studying metamaterials at low frequency, where wavelengths are much larger than the unit cell, the requirements of homogenization and the effective medium approximation can be easily met. The Swiss Roll medium is well‐suited to the RF frequency range, and here we review its behaviour, both as a one‐dimensional system where endoscope ...
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Radio Frequency (RF) Blackout During Hypersonic Reentry
AIAA/CIRA 13th International Space Planes and Hypersonics Systems and Technologies Conference, 2005Air ionization and heat shield ablation generate a plasma sheath around reentering hypersonic vehicles. This ionized plasma layer reflects and attenuates propagating electromagnetic waves to a point where total RF blackout can and does occur. RF blackout is of special concern for hypersonic vehicles because con tinuous contact with ground stations and ...
David Mather +3 more
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Development of incombustible radio frequency (RF) absorber
Proceedings of International Symposium on Electromagnetic Compatibility, 2002The paper reports on an incombustible inorganic substance-type RF absorber which the author has succeeded in developing as a material to take the place of conventional flammable organic-type RF absorber material. The material of this new RF absorber is composed of super-light cement mortar as a base, to which carbon fibers and also carbon graphite (if ...
Y. Shinozaki, K. Shimada
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Hybrid Optical/Radio Frequency (RF) Communications
2014The use of hybrid free-space optical (FSO)/radio frequency (RF) links can provide robust, high-throughput communication networks for both commercial and military applications. The free-space optical communication (FSOC) links can be operated at data rates much greater than that of RF links.
L. C. Andrews +4 more
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Radio Frequency (RF) Biomolecules
2005Abstract : This report details the results of the MIT RF Biology Program. The RF Biology Program represents an effort to imbue electronic functionality to biomolecules and a means for synthesizing electronically active biomolecules.
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Coaxial Radio Frequency (RF) Diathermy in Anterior Segment Surgery
Ophthalmic Surgery, Lasers and Imaging Retina, 1985ABSTRACT Modern ophthalmic microsurgery, particularly cataract extraction, trabeculectomy, and other forms of glaucoma filtration surgery, has been characterized by ever increasing precision. The use of radio frequency (RF) currents for cautery of blood vessels in anterior segment microsurgery has several advantages over other methods widely ...
J A, Savage, R J, Simmons
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Complex radio frequency (RF) communications with virtual pulses
Computers & Electrical Engineering, 2008A novel complex pulse forming technique has been developed using ultra wideband (UWB) frequency concepts where multiple carriers are modulated by the pulse width of the primary signal source. Specialized modulation of the pulse train provides an effective communication medium with inherent advantages of an UWB system.
Joshua Y. Maina +3 more
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Design of Radio Frequency (RF) MEMS Switches: Modeling
Microelectromechanical Systems, 2003Mechanical modeling of RF MEMS switches is important for performance optimization and device reliability. 1-D, 2-D, and 3-D linear analytical models have been proposed to analyze the electrostatic pull-in of a fixed-fixed beam at small deflection. However, most RF MEMS switch structures work at large deflection range.
Yong Zhu, Horacio D. Espinosa
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Radio Frequency (RF) Radiation Exposure and Health
2017Through the history of wireless communication I show the explosive growth in time of mobile telephony and explain how this affects the perception of fear of the general public for electromagnetic radiation. Then, after explaining the physics of electromagnetic radiation, I discuss the interaction with the human body.
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