Statements (51)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
physical phenomenon
|
| gptkbp:appliesTo |
electromagnetic waves
acoustic waves |
| gptkbp:clearanceRecommended |
60% of first Fresnel zone
|
| gptkbp:dependsOn |
wavelength
distance between transmitter and receiver zone number |
| gptkbp:describes |
regions of constructive and destructive interference
|
| gptkbp:field |
gptkb:optics
radio propagation wave physics |
| gptkbp:firstDescribed |
gptkb:Augustin-Jean_Fresnel
19th century |
| gptkbp:form |
gptkb:Huygens-Fresnel_principle
radius = sqrt(nλd1d2/(d1+d2)) |
| gptkbp:hasUnit |
meters (for radius)
|
| gptkbp:higherZones |
alternate between constructive and destructive interference
|
| https://www.w3.org/2000/01/rdf-schema#label |
Fresnel zones
|
| gptkbp:importantFor |
obstacle clearance
signal strength line-of-sight communication |
| gptkbp:namedAfter |
gptkb:Augustin-Jean_Fresnel
|
| gptkbp:number |
order (first, second, etc.)
|
| gptkbp:obstructionEffect |
signal attenuation
|
| gptkbp:relatedTo |
gptkb:Fresnel_diffraction
gptkb:Fresnel_integrals diffraction interference |
| gptkbp:shape |
ellipsoidal
|
| gptkbp:usedIn |
cellular networks
fiber optics geophysics radar systems radio astronomy remote sensing telecommunications wireless communication satellite communication optical systems ultrasound imaging wireless networking microwave transmission antenna theory point-to-point radio links Wi-Fi design seismic wave analysis terrestrial microwave links |
| gptkbp:visualizes |
concentric ellipsoids between transmitter and receiver
|
| gptkbp:zone |
region of strongest constructive interference
|
| gptkbp:bfsParent |
gptkb:Fresnel_diffraction
|
| gptkbp:bfsLayer |
7
|