`CPW`#

class pyedb.libraries.rf_libraries.base_functions.CPW(edb_cell: pyedb.Edb | None = None, length: str | float = 0.001, width: str | float = 0.0003, gap: str | float = 0.0001, layer: str = 'TOP', ground_net: str = 'GND', ground_width: float = 0.0001, ground_layer: str = 'GND', net: str = 'SIG', substrate: pyedb.libraries.common.Substrate = Substrate(0.0001, 4.4, 0.02, 'SUB', (0.001, 0.001)))#

Coplanar waveguide with side ground planes.

Parameters:

lengthfloat, default 1 mm: Physical length of the line.
widthfloat, default 0.3 mm: Width of the centre conductor.
gapfloat, default 0.1 mm: Gap between centre conductor and ground planes.
layerstr, default “TOP”: Layer on which the CPW is drawn.
ground_netstr, default “GND”: Net name for the ground planes.
ground_widthfloat, default 0.1 mm: Width of the side ground strips.
ground_layerstr, default “GND”: Layer for the underlying ground plane.
netstr, default “SIG”: Net name for the centre conductor.
substrateSubstrate, default 100 µm FR4: Substrate definition.

Examples

>>> cpw = CPW(length=5e-3, width=0.4e-3, gap=0.2e-3)
>>> edb = Edb("cpw.aedb")
>>> cpw._pedb = edb
>>> cpw.create()
>>> f"{cpw.analytical_z0:.1f} Ω"
'46.5 Ω'

Overview#

Methods

create

Draw the centre strip, side grounds and bottom ground plane.

Properties

analytical_z0

Characteristic impedance obtained with the conformal-mapping

Attributes

`length`
`width`
`gap`
`layer`
`ground_net`
`ground_width`
`ground_layer`
`net`
`substrate`

Import detail#

from pyedb.libraries.rf_libraries.base_functions import CPW

Property detail#

property CPW.analytical_z0: float#

Characteristic impedance obtained with the conformal-mapping formula for CPW.

Returns:

float: Z0 in Ohm.

Attribute detail#

CPW.length#

CPW.width#

CPW.gap#

CPW.layer = 'TOP'#

CPW.ground_net = 'GND'#

CPW.ground_width = 0.0001#

CPW.ground_layer = 'GND'#

CPW.net = 'SIG'#

CPW.substrate#

Method detail#

CPW.create() → bool#