antenna EMF
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EMF-Messungen — Sonde für elektrisches Feld FP2000 (Frequenzband 100 kHz–2500 MHz) Die EMF Messungen, die für die Messungen der elektromagnetischen Felder gebraucht werden, werden durch Sonden oder Sensoren durchgeführt. Auch wenn sie mit anderen Eigenschaften… … Deutsch Wikipedia
Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… … Wikipedia
Mediciones EMF — Sonda CEM FP2000 (range 100 kHz – 2500 MHz Las mediciones EMF (Electromagnetic Field) o de campo electromagnetico CEM son medidas realizadas con sondas y sensores. Estas sondas pueden ser consideradas como fueran antenas aunque sean proyectadas… … Wikipedia Español
Mobile phone radiation and health — A man speaking on a mobile telephone The effect of mobile phone radiation on human health is the subject of recent interest and study, as a result of the enormous increase in mobile phone usage throughout the world (as of June 2009 … Wikipedia
Electromagnetic radiation and health — Electromagnetic radiation can be classified into ionizing radiation and non ionizing radiation, based on whether it is capable of ionizing atoms and breaking chemical bonds. Ultraviolet and higher frequencies, such as X rays or gamma rays are… … Wikipedia
ALLISS — Disambiguation * Financial Instruments: The Alliss Grant a US Financial Aid instrument, see [http://www.lsc.cc.mn.us/FinancialAid/allissGrant.cfm] [http://www.mnscu.edu/students/specialprograms/alliss.html] . * People: Peter Alliss (UK golfer and … Wikipedia
Electromagnetic field — The electromagnetic field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field.The electromagnetic field extends indefinitely throughout space and describes the… … Wikipedia
Spark-gap transmitter — A spark gap transmitter is a device for generating radio frequency electromagnetic waves. These devices served as the transmitters for most wireless telegraphy systems for the first three decades of radio (1887 ndash;1916) and the first… … Wikipedia
Optical heterodyne detection — is an important special case of heterodyne detection. In heterodyne detection, a signal of interest at some frequency is non linearly mixed with a reference local oscillator (LO) that is set at a close by frequency. The desired outcome is the… … Wikipedia
Skin effect — Skin depth redirects here. For the depth (layers) of biological/organic skin, see skin. Skin effect is the tendency of an alternating electric current (AC) to distribute itself within a conductor with the current density being largest near the… … Wikipedia
Kirchhoff's circuit laws — are two equalities that deal with the conservation of charge and energy in electrical circuits, and were first described in 1845 by Gustav Kirchhoff.[1] Widely used in electrical engineering, they are also called Kirchhoff s rules or simply… … Wikipedia
