skrf.media.coaxial.Coaxial
- class skrf.media.coaxial.Coaxial(frequency=None, z0_port=None, z0_override=None, z0=None, Dint=0.00081, Dout=0.005, epsilon_r=1, tan_delta=0, sigma=1e+99, *args, **kwargs)[source]
A coaxial transmission line defined in terms of its inner/outer diameters and permittivity.
- Parameters:
frequency (
Frequency
object) – Frequency band.z0_port (number, array-like, or None) – z0_port is the port impedance for networks generated by the media. If z0_port is not None, the networks generated by the media are renormalized (or in other words embedded) from the characteristic impedance z0 of the media to z0_port. Else if z0_port is None, the networks port impedances will be the raw characteristic impedance z0 of the media. (Default is None)
z0_override (number, array-like, or None) – z0_override override the characteristic impedance for the media. If z0_override is not None, the networks generated by the media have their characteristic impedance z0 overrided by z0_override. (Default is None)
z0 (number, array-like, or None) – deprecated parameter, alias to z0_override if z0_override is None. Emmit a deprecation warning.
Dint (number, or array-like) – inner conductor diameter, in m
Dout (number, or array-like) – outer conductor diameter, in m
epsilon_r (number, or array-like, optional) – relative permittivity of the dielectric medium. Default is 1.
tan_delta (number, or array-like, optional) – loss tangent of the dielectric medium. Default is 0.
sigma (number, or array-like, optional.) – conductors electrical conductivity, in S/m. Default is infinity (non lossy metal).
TODO : different conductivity in case of different conductor kind
Note
Dint, Dout, epsilon_r, tan_delta, sigma can all be vectors as long as they are the same length
References
Attributes
Distributed capacitance C, in F/m |
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Distributed conductance G, in S/m |
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Distributed inductance L, in H/m |
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Distributed resistance R, in Ohm/m. |
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Surface resistivity in Ohm/area. |
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Distributed Admittance, \(Y^{'}\). |
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Distributed Impedance, \(Z^{'}\). |
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Characteristic Impedance |
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Inner radius of the coaxial line |
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Real (attenuation) component of gamma. |
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Outer radius of the coaxial line |
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Imaginary (propagating) component of gamma. |
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Propagation Constant, \(\gamma\). |
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Number of points of the frequency axis. |
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Complex group velocity (in m/s). |
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Complex phase velocity (in m/s). |
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Return Characteristic Impedance z0_characteristic. |
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Characteristic Impedance, \(z_0\) |
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Port Impedance. |
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Port Impedance. |
Methods
Ideal matched attenuator of a given length. |
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Capacitor. |
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Capacitor with Q factor. |
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Copy of this Media object. |
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Delayed load. |
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Delayed open transmission line. |
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Delayed Short. |
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Calculate the complex electrical length for a given distance. |
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Determines physical distance from a transmission or reflection Network. |
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Init from characteristic impedance and outer diameter. |
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Init from electrical properties of the line: attenuation and velocity factor. |
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Create a DistributedCircuit from numerical values stored in a csv file. |
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Initializes a DistributedCircuit from an existing |
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Two-port network for an impedance mismatch. |
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Inductor. |
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Inductor with Q factor. |
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Two-port isolator. |
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Transmission line of a given length and impedance. |
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Load of given reflection coefficient. |
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Lossless, symmetric mismatch defined by its return loss. |
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Perfect matched load (\(\Gamma_0 = 0\)). |
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Create another mode in this medium. |
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Open (\(\Gamma_0 = 1\)). |
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Complex random network. |
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Resistor. |
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Short (\(\Gamma_0 = -1\)) |
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Shunts a |
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Shunted capacitor. |
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Shunted delayed load. |
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Shunted delayed open. |
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Shunted delayed short. |
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Shunted inductor. |
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Shunted resistor. |
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Ideal, lossless n-way splitter. |
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Ideal, lossless tee. |
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Convert electrical length to physical distance. |
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Matched transmission line of length 0. |
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Translate various units of distance into meters. |
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Complex zero-mean gaussian white-noise network. |
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write this media's frequency, gamma, Z0, and z0 to a csv file. |