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[[File:TransmissionLineDefinitions.svg|thumb|310px|A [[transmission line]] is drawn as two black wires. At a distance ''x'' into the line, there is current [[phasor]] ''I(x)'' traveling through each wire, and there is a [[voltage difference]] phasor ''V(x)'' between the wires (bottom voltage minus top voltage). If <math>Y_0</math> is the '''characteristic admittance''' of the line, then <math>I(x) / V(x) = Y_0</math> for a wave moving rightward, or <math>I(x)/V(x) = -Y_0</math> for a wave moving leftward.]] | |||
'''Characteristic admittance''' is the mathematical inverse of the [[characteristic impedance]]. | |||
The general expression for the characteristic admittance of a transmission line is: | |||
:<math>Y_0=\sqrt{\frac{G+j\omega C}{R+j\omega L}}</math> | |||
where | |||
:<math>R</math> is the [[Electrical resistance|resistance]] per unit length, | |||
:<math>L</math> is the [[inductance]] per unit length, | |||
:<math>G</math> is the [[Electrical conductance|conductance]] of the dielectric per unit length, | |||
:<math>C</math> is the [[capacitance]] per unit length, | |||
:<math>j</math> is the [[imaginary unit]], and | |||
:<math>\omega</math> is the [[angular frequency]]. | |||
The current and voltage [[Phasor (electronics)|phasor]]s on the line are related by the characteristic admittance as: | |||
:<math>\frac{I^+}{V^+} = Y_0 = -\frac{I^-}{V^-}</math> | |||
where the superscripts <math>+</math> and <math>-</math> represent forward- and backward-traveling waves, respectively. | |||
==See also== | |||
* [[Characteristic impedance]] | |||
==References== | |||
*{{cite book | |||
| last = Guile | |||
| first = A. E. | |||
| title = Electrical Power Systems | |||
| year = 1977 | |||
| isbn = 0-08-021729-X }} | |||
*{{cite book | |||
| last = Pozar | |||
| first = D. M. | |||
| title = Microwave Engineering | |||
| edition = 3rd edition | |||
|date=February 2004 | |||
| isbn = 0-471-44878-8 }} | |||
*{{cite book | |||
| last = Ulaby | |||
| first = F. T. | |||
| title = Fundamentals Of Applied Electromagnetics | |||
| edition = media edition | |||
| year = 2004 | |||
| publisher = Prentice Hall | |||
| isbn = 0-13-185089-X }} | |||
{{DEFAULTSORT:Characteristic Admittance}} | |||
[[Category:Electricity]] | |||
[[Category:Physical quantities]] | |||
[[Category:Distributed element circuits]] | |||
Revision as of 15:16, 16 April 2013
Characteristic admittance is the mathematical inverse of the characteristic impedance. The general expression for the characteristic admittance of a transmission line is:
where
- is the resistance per unit length,
- is the inductance per unit length,
- is the conductance of the dielectric per unit length,
- is the capacitance per unit length,
- is the imaginary unit, and
- is the angular frequency.
The current and voltage phasors on the line are related by the characteristic admittance as:
where the superscripts and represent forward- and backward-traveling waves, respectively.
See also
References
- 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.
My blog: http://www.primaboinca.com/view_profile.php?userid=5889534 - 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.
My blog: http://www.primaboinca.com/view_profile.php?userid=5889534 - 20 year-old Real Estate Agent Rusty from Saint-Paul, has hobbies and interests which includes monopoly, property developers in singapore and poker. Will soon undertake a contiki trip that may include going to the Lower Valley of the Omo.
My blog: http://www.primaboinca.com/view_profile.php?userid=5889534