Definition of Variables
Definition of Variables#
Symbol |
Unit |
Definition |
|---|---|---|
\(\beta\) |
1 / meter |
Wavenumber of wave in conductor \(= 2\pi/\lambda\) |
\(\epsilon\) |
farads / meter |
Permittivity per meter of the dielectric in cable |
\(\epsilon_0\) |
farads / meter |
Permittivity of free space (constant) |
\(\epsilon_{\text{eff}}\) |
farads / meter |
Effective relative permittivity per meter of cable |
\(\epsilon_r\) |
none |
Relative permittivity of the dielectric in cable |
\(\kappa\) |
none |
Velocity factor of current in conductor \( = \nu_p\ /\ c\) |
\(\lambda\) |
meter |
Wavelength of radio waves in conductor |
\(\lambda_0\) |
meter |
Wavelength of radio waves in free space |
\(\mu\) |
henries / meter |
Effective magnetic permeability per meter of cable |
\(\mu_0\) |
henries / meter |
Permeability of free space (constant) |
\(\mu_r\) |
none |
Relative permeability of dielectric in cable |
\(\nu\) |
none |
Index of refraction of dielectric material |
\(\phi\) |
radians or degrees |
Phase shift of current between the ends of the conductor |
\(\omega\) |
radians / second |
Angular frequency of alternating current \( = 2 \pi f\) |
\(c\) |
meters / second |
Speed of light in vacuum |
\(C\) |
farads / meter |
Shunt capacitance per unit length of the conductor |
\(f\) |
hertz |
Frequency of radio waves |
\(F\) |
none |
Fraction of space filled with dielectric, fill factor of a transmission line |
\(G\) |
none |
Electrical length of conductor |
\(G_0\) |
none |
Electrical length of electromagnetic wave in free space |
\(l\) |
meter |
Length of the conductor |
\(L\) |
henries / meter |
Inductance per unit length of the conductor |
\(T\) |
second |
Period of radio waves |
\(t\) |
second |
Time |
\(\nu_p\) |
meters / second |
Phase velocity of current in conductor |
\(x\) |
meter |
Distance along conductor |