dipole length

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• dipole — [dī′pōl΄] n. 1. Physics any system having two equal but opposite electric charges or magnetic poles separated by a very small distance 2. Chem. a polar molecule in which the centers of positive and negative charge are separated 3. a radio or… …   English World dictionary

• Dipole antenna — A schematic of a half wave dipole antenna connected to an unbalanced coaxial cable. Better practice is to connect the balanced dipole to the unbalanced line with a balun. A dipole antenna is a radio antenna that can be made of a simple wire, with …   Wikipedia

• dipole antenna — noun an aerial half a wavelength long consisting of two rods connected to a transmission line at the center • Syn: ↑dipole • Hypernyms: ↑antenna, ↑aerial, ↑transmitting aerial * * * dipole antenna, a radio or television antenna having two… …   Useful english dictionary

• dipole antenna — i. An antenna system composed of two, separated, electrically equal elements. ii. Radiators, usually fed in the center, that produce a maximum of radiation in the plane normal to its axis. The length required for efficient radiation is a function …   Aviation dictionary

• Discrete dipole approximation — In discrete dipole approximation larger object is approximated in terms of discrete dipoles The discrete dipole approximation (DDA) is a method for computing scattering of radiation by particles of arbitrary shape and by periodic structures.… …   Wikipedia

• Antenna (radio) — Whip antenna on car …   Wikipedia

• geomagnetic field — Magnetic field associated with the Earth. It is essentially dipolar (i.e., it has two poles, the northern and southern magnetic poles) on the Earth s surface. Away from the surface, the field becomes distorted. Most geomagnetists explain the… …   Universalium

• Magnetic field — This article is about a scientific description of the magnetic influence of an electric current or magnetic material. For the physics of magnetic materials, see magnetism. For information about objects that create magnetic fields, see magnet. For …   Wikipedia

• electricity — /i lek tris i tee, ee lek /, n. 1. See electric charge. 2. See electric current. 3. the science dealing with electric charges and currents. 4. a state or feeling of excitement, anticipation, tension, etc. [1640 50; ELECTRIC + ITY] * * *… …   Universalium

• chemical bonding — ▪ chemistry Introduction       any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world. When atoms approach one another …   Universalium

• 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