Nov 17, 2015 14:03
8 yrs ago
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English term
Knee
English to French
Tech/Engineering
Electronics / Elect Eng
Teflon/PTFE
Dans une description de câbles coaxiaux:
FEP dielectric is phase-stable at room-temperature range (as opposed to PTFE which exhibits ***knee*** effect due to molecular phase transition).
On trouve sur Internet d'autres informations sur ce "knee":
- These cables incorporate a revolutionary new dielectric composition that eliminates the infamous non-linear “***knee***” exhibited by Polytetrafluoroethylene (PTFE) based dielectrics
- PTFE, in many ways, is the perfect material for RF and microwave dielectrics. It has a very low loss tangent and the electrical properties are virtually constant across a wide range of temperatures. Unfortunately, this material has one very significant shortcoming. At around +18 degrees C (65 F) the material undergoes a molecular phase transition. When transiting through this band of temperatures the material undergoes a “step function” change in dielectric constant. Along with this change in dielectric constant is an abrupt change in electrical length. This is commonly known as the Teflon™ “***knee***”.
Comment traduit-on cette caractéristique du téflon en français?
FEP dielectric is phase-stable at room-temperature range (as opposed to PTFE which exhibits ***knee*** effect due to molecular phase transition).
On trouve sur Internet d'autres informations sur ce "knee":
- These cables incorporate a revolutionary new dielectric composition that eliminates the infamous non-linear “***knee***” exhibited by Polytetrafluoroethylene (PTFE) based dielectrics
- PTFE, in many ways, is the perfect material for RF and microwave dielectrics. It has a very low loss tangent and the electrical properties are virtually constant across a wide range of temperatures. Unfortunately, this material has one very significant shortcoming. At around +18 degrees C (65 F) the material undergoes a molecular phase transition. When transiting through this band of temperatures the material undergoes a “step function” change in dielectric constant. Along with this change in dielectric constant is an abrupt change in electrical length. This is commonly known as the Teflon™ “***knee***”.
Comment traduit-on cette caractéristique du téflon en français?
Proposed translations
(French)
| 3 +1 | coude (de la courbe) |
Françoise Picaronny
|
| 4 | chute brusque |
FX Fraipont (X)
|
| 4 | creux dans la courbe |
HERBET Abel
|
Proposed translations
+1
2 hrs
Selected
coude (de la courbe)
Suggestion. Voir lien ci-dessous.
4 KudoZ points awarded for this answer.
Comment: "Merci"
3 hrs
chute brusque
"knee" : abrupt drop in the curve
pic : http://www.mpdigest.com/issue/Articles/2014/Mar/Times/fig1.j...
at room temperature, around 18°, the teflon changes phase and the characteristics of the dielectric change
"These cables incorporate a revolutionary new dielectric composition that eliminates the infamous non-linear “knee” exhibited by Polytetrafluoroethylene (PTFE) based dielectrics. A brief summary of the history of cable dielectric materials will further illustrate this dramatic breakthrough in microwave transmission line technology."
http://www.mpdigest.com/issue/Articles/2014/Mar/Times/defaul...
"What About That “Knee?”
PTFE, in many ways, is the perfect material for RF and microwave dielectrics. It has a very low loss tangent and the electrical properties are virtually constant across a wide range of temperatures. Unfortunately, this material has one very significant shortcoming. At around +18 degrees C (65 F) the material undergoes a molecular phase transition. When transiting through this band of temperatures the material undergoes a “step function” change in dielectric constant. Along with this change in dielectric constant is an abrupt change in electrical length. This is commonly known as the TeflonTM “knee”. The dielectric and metal effects on electrical length can be balanced above and below this phase transition band of
temperatures. But the laws of physics are irrefutable. The knee will always be present in PTFE dielectric cable."
Current Innovations In Phase Stable Coaxial Cable Design
https://www.timesmicrowave.com/downloads/tech/phasearticle.p...
pic : http://www.mpdigest.com/issue/Articles/2014/Mar/Times/fig1.j...
at room temperature, around 18°, the teflon changes phase and the characteristics of the dielectric change
"These cables incorporate a revolutionary new dielectric composition that eliminates the infamous non-linear “knee” exhibited by Polytetrafluoroethylene (PTFE) based dielectrics. A brief summary of the history of cable dielectric materials will further illustrate this dramatic breakthrough in microwave transmission line technology."
http://www.mpdigest.com/issue/Articles/2014/Mar/Times/defaul...
"What About That “Knee?”
PTFE, in many ways, is the perfect material for RF and microwave dielectrics. It has a very low loss tangent and the electrical properties are virtually constant across a wide range of temperatures. Unfortunately, this material has one very significant shortcoming. At around +18 degrees C (65 F) the material undergoes a molecular phase transition. When transiting through this band of temperatures the material undergoes a “step function” change in dielectric constant. Along with this change in dielectric constant is an abrupt change in electrical length. This is commonly known as the TeflonTM “knee”. The dielectric and metal effects on electrical length can be balanced above and below this phase transition band of
temperatures. But the laws of physics are irrefutable. The knee will always be present in PTFE dielectric cable."
Current Innovations In Phase Stable Coaxial Cable Design
https://www.timesmicrowave.com/downloads/tech/phasearticle.p...
3 hrs
HERBET Abel
Native in French
Works in field
Graduate engineer
Native in: French (Variant: Standard-France)
Works in: English to French, French to English
Related KudoZ points
:
129
creux dans la courbe
suggéré
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