Directionalantenna
Image LPDA large.jpg thumb right Log periodic dipole array A directionalantenna or beam antenna is an antenna ... as directional antennas. See also Amateur radio direction finding Cantenna Cardioid Cassegrain antenna ..
T-antenna
A T antenna is an Antenna radio antenna whereby a vertical or sloping wire is connected to the approximate ... Antenna, R.J.Edwards G4FGQ tech stub ..
Antenna
wiktionarypar antennaAntenna plural antennae biology or antennas radio may refer to Science and engineering Antenna radio , the component designed to send and receive radio waves Antenna biology , the sensing ..
Directional array directional arrays or a single directionalantenna so that other broadcasters may utilize the same ...mergeto Phased array date September 2007 In broadcast engineering , directional array refers to multiple ..
Directional well
Image True vertical depth.jpg thumb 250 px right Depiction of a directional well. br Line a is an imaginary ... is called the measured depth . A http www.glossary.oilfield.slb.com Display.cfm?Term directional ..
Directional symmetry
context Directional symmetry is roughly defined as things going the same direction, and is to be distinguished from directional asymmetry , meaning things going different directions. The following formula ..
Directional arrow
Orphan date November 2006 Directional arrows are a type of traffic sign directing people to points of interest ... Traffic signs Directional arrow ..
Directional selection
, directional selection occurs when natural selection favors a single phenotype and therefore allele frequency continuously shifts in one direction. Under directional selection, the advantageous allele ..
Directional marketing
Orphan date September 2008 Directional Marketing is a type of marketing , a measurable form of direct ... to unsolicited consumers, directional marketing is primarily consumer initiated where consumers ..
Directional solidification Directional solidification is a series of measures applied to control the feeding of castings. As most ... began. Directional solidification can be used as a purification process. Since most impurities ..
Directional Sound
without a receiving set. Directional Sound refers to the notion of using various devices to create ... to accomplish this, and each has its benefits and drawbacks. Ultimately, choosing a directional ..
Directional boring
Unreferenced date September 2007 Image Horizontal Drilling 1.JPG thumb 250px A small directional boring unit in action Directional boring , commonly called horizontal directional drilling or HDD, is a steerable ..
Directional drilling
refimprove date July 2006 Directional drilling or slant drilling is the practice of drilling non vertical oil well well s. It can be broken down into three main groups Oilfield Directional Drilling, Utility ..
Directional statistics Directional statistics is the subdiscipline of statistics that deals with directions unit vector s in R ... s in R sup n sup . More generally, directional statistics deals with observations on compact Riemannian ..
Directional derivative
In mathematics , the directional derivative of a multivariate differentiable function along a given vector ... . The directional derivative is a special case of the Gâteaux derivative . Definition The directional ..
Directional Michigan
Image Directional michigan 50.gif thumb left ESPN ESPN s icon Directional Michigan is a term used in college ... schools that make up the Directional Michigan moniker are Central Michigan University in Mount Pleasant ..
Directional stability Directional stability is the tendency of a moving body to align itself with the direction of motion. With the exception ..., moment of inertia and speed, so the damping is positive, and the directional motion should be dynamically ..
Turnstile antenna
plane. When mounted vertically the antenna is directional to a right angle to its plane and is circularly ...Image SatelliteAntenna 137MHz.jpg thumb right A turnstile antenna for Low Earth Orbit LEO weather satellites ..
Antenna array Antenna array may refer to an Interferometry interferometric array of Radio telescope s used in radio astronomy . a Phased array , also known as a smart antenna , an electronically steerable directional ..
Antenna rotator
An Antenna Rotator is device which is used to change the orientation of a directionalantenna . Most antenna rotators have two parts, the rotator unit and the controller. The controller is normally placed ..
Monopole antenna
in order to control the direction of Radio Frequency RF propagation, they are called directionalantenna ...Unreferenced date December 2006 Image Monopole.jpg thumb right 240px Monopole antenna used for broadcasting ..
Omnidirectional antenna
Image Schwarzbeck RE 1790.jpg right thumb 240px Vertical polarized VHF UHF biconical antenna 170 1100 MHz with omni directional H plane pattern. An omnidirectional antenna is an antenna electronics antenna ..
Loop antenna
Image DIYLoopAntennaUnderConstruction.JPG thumb right 200px A DIY loop antenna under construction to be used for amateur radio A loop antenna radio antenna has a continuous conducting path leading from ..
Beverage antenna
antennas are highly directionalantennadirectional and physically far too large to be practically ...Image Antenna boom comparison.png frame Yagi Uda antenna signal gathering action compared to other end ..
Rhombic antenna directionalantenna electronics antenna invented by Edmond Bruce , mostly commonly used in HF high ...Cleanup date January 2007 Image Antenna boom comparison.png frame Rhombic antenna signal gathering action ..
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