https://data.zendantennes.omgeving.vlaanderen.be/ns/zendantenne#winst |
|
http://www.w3.org/2000/01/rdf-schema#range
|
http://www.w3.org/2000/01/rdf-schema#Literal
|
|
http://www.w3.org/2000/01/rdf-schema#label
|
Antenna gain |
| Antenne winst
|
|
http://www.w3.org/2000/01/rdf-schema#seeAlso
|
http://dbpedia.org/page/Antenna_gain
|
|
http://www.w3.org/2000/01/rdf-schema#isDefinedBy
|
https://data.zendantennes.omgeving.vlaanderen.be/ns/zendantenne
|
|
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
|
http://www.w3.org/2002/07/owl#DatatypeProperty
|
|
http://www.w3.org/2000/01/rdf-schema#comment
|
In electromagnetics, an antenna's power gain or simply gain is a key performance number which combines the antenna's directivity and electrical efficiency. As a transmitting antenna, the gain describes how well the antenna converts input power into radio waves headed in a specified direction. As a receiving antenna, the gain describes how well the antenna converts radio waves arriving from a specified direction into electrical power. When no direction is specified, "gain" is understood to refer to the peak value of the gain. A plot of the gain as a function of direction is called the radiation pattern. Antenna gain is usually defined as the ratio of the power produced by the antenna from a far-field source on the antenna's beam axis to the power produced by a hypothetical lossless isotropic antenna, which is equally sensitive to signals from all directions. Usually this ratio is expressed in decibels, and these units are referred to as "decibels-isotropic" (dBi). An alternative definition compares the antenna to the power received by a lossless half-wave dipole antenna, in which case the units are written as dBd. Since a lossless dipole antenna has a gain of 2.15 dBi, the relation between these units is: gain in dBd = gain in dBi − 2.15. For a given frequency, the antenna's effective area is proportional to the power gain. An antenna's effective length is proportional to the square root of the antenna's gain for a particular frequency and radiation resistance. Due to reciprocity, the gain of any antenna when receiving is equal to its gain when transmitting. Directive gain or directivity is a different measure which does not take an antenna's electrical efficiency into account. This term is sometimes more relevant in the case of a receiving antenna where one is concerned mainly with the ability of an antenna to receive signals from one direction while rejecting interfering signals coming from a different direction.
|
https://data.zendantennes.omgeving.vlaanderen.be/ns/zendantenne#Conformiteitsattest |
|
http://www.w3.org/2000/01/rdf-schema#label
|
Conformiteitsattest
|
|
http://www.w3.org/2000/01/rdf-schema#isDefinedBy
|
https://data.zendantennes.omgeving.vlaanderen.be/ns/zendantenne
|
|
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
|
http://www.w3.org/2002/07/owl#Class
|
|
http://purl.org/vocab/vann/usageNote
|
TO DO
|
|
http://www.w3.org/2000/01/rdf-schema#comment
|
Vooraleer een antenne-eigenaar zendantennes in gebruik mag nemen, moet hij een conformiteitsattest krijgen van de Vlaamse overheid. Om dat aan te vragen moet de antenne-eigenaar een technisch dossier opmaken. Dat bevat de technische eigenschappen van de antennes zoals zendvermogen en de kenmerken van de omgeving zoals de hoogte van de gebouwen in de buurt van de antennes. Daarmee toont de antenne-eigenaar aan dat de antennes de norm respecteren. De Vlaamse overheid controleert vervolgens het technisch dossier. Als het dossier in orde is, bezorgt de Vlaamse overheid het conformiteitsattest aan de antenne-eigenaar en tegelijk ook aan de gemeente waar de antenne gelegen is.
|
|
http://www.w3.org/2000/01/rdf-schema#subClassOf
|
https://data.omgeving.vlaanderen.be/ns/dossier#Besluit
|