skrf.media.rectangularWaveguide.RectangularWaveguide

class skrf.media.rectangularWaveguide.RectangularWaveguide(frequency=None, z0_port=None, z0_override=None, z0=None, a=1, b=None, mode_type='te', m=1, n=0, ep_r=1, mu_r=1, rho=None, roughness=None, *args, **kwargs)

A single mode of a homogeneously filled rectangular waveguide.

Parameters:

• frequency (Frequency object) – frequency band of this transmission line medium

• 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.

• a (number, optional) – width of waveguide, in meters. Default is 1.

• b (number or None, optional) – height of waveguide, in meters. If None defaults to a/2. Default is None

• mode_type (['te','tm']) – mode type, transverse electric (te) or transverse magnetic (tm) to-z. where z is direction of propagation

• m (int) – mode index in ‘a’-direction

• n (int) – mode index in ‘b’-direction

• ep_r (number, array-like,) – filling material’s relative permittivity

• mu_r (number, array-like) – filling material’s relative permeability

• rho (number, array-like, string) – resistivity (ohm-m) of the conductor walls. If array-like must be same length as frequency. if str, it must be a key in skrf.data.materials.

• roughness (number, or array-like) – surface roughness of the conductor walls in units of RMS deviation from surface

• *args (arguments, keyword arguments) – passed to Media’s constructor (__init__()

• **kwargs (arguments, keyword arguments) – passed to Media’s constructor (__init__()

Examples

Most common usage is standard aspect ratio (2:1) dominant mode, TE10 mode of wr10 waveguide can be constructed by

>>> freq = rf.Frequency(75,110,101,'ghz')
>>> rf.RectangularWaveguide(freq,a= 100*mil)

Attributes

Z0	Characteristic Impedance
alpha	Real (attenuation) component of gamma.
alpha_c	Loss due to finite conductivity and roughness of sidewalls.
beta	Imaginary (propagating) component of gamma.
ep	The permittivity of the filling material.
f_cutoff	cutoff frequency for this mode.
f_norm	Frequency vector normalized to cutoff.
gamma	The propagation constant (aka Longitudinal wave number).
k0	Characteristic wave number.
kc	Cut-off wave number.
kx	Eigenvalue in the 'a' direction.
ky	Eigenvalue in the b direction.
lambda_cutoff	Cutoff wavelength.
lambda_guide	Guide wavelength.
mu	The permeability of the filling material.
npoints	Number of points of the frequency axis.
rho	Conductivity of sidewalls in ohm*m.
v_g	Complex group velocity (in m/s).
v_p	Complex phase velocity (in m/s).
z0	Return Characteristic Impedance z0_characteristic.
z0_characteristic	The characteristic impedance, \(z_0\).
z0_override	Port Impedance.
z0_port	Port Impedance.

Methods

__init__
attenuator	Ideal matched attenuator of a given length.
capacitor	Capacitor.
capacitor_q	Capacitor with Q factor.
copy	Copy of this Media object.
delay_load	Delayed load.
delay_open	Delayed open transmission line.
delay_short	Delayed Short.
electrical_length	Calculate the complex electrical length for a given distance.
extract_distance	Determines physical distance from a transmission or reflection Network.
from_z0	Initialize from specified impedance at a given frequency, assuming the fundamental TE10 mode.
get_array_of
impedance_mismatch	Two-port network for an impedance mismatch.
inductor	Inductor.
inductor_q	Inductor with Q factor.
isolator	Two-port isolator.
line	Transmission line of a given length and impedance.
load	Load of given reflection coefficient.
lossless_mismatch	Lossless, symmetric mismatch defined by its return loss.
match	Perfect matched load (\(\Gamma_0 = 0\)).
mode	Create another mode in this medium.
open	Open (\(\Gamma_0 = 1\)).
plot
random	Complex random network.
resistor	Resistor.
short	Short (\(\Gamma_0 = -1\))
shunt	Shunts a Network.
shunt_capacitor	Shunted capacitor.
shunt_delay_load	Shunted delayed load.
shunt_delay_open	Shunted delayed open.
shunt_delay_short	Shunted delayed short.
shunt_inductor	Shunted inductor.
shunt_resistor	Shunted resistor.
splitter	Ideal, lossless n-way splitter.
tee	Ideal, lossless tee.
theta_2_d	Convert electrical length to physical distance.
thru	Matched transmission line of length 0.
to_meters	Translate various units of distance into meters.
white_gaussian_polar	Complex zero-mean gaussian white-noise network.
write_csv	write this media's frequency, gamma, Z0, and z0 to a csv file.