# This code is part of KQCircuits
# Copyright (C) 2021 IQM Finland Oy
#
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
# version.
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# (meetiqm.com/iqm-open-source-trademark-policy). IQM welcomes contributions to the code.
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from kqcircuits.pya_resolver import pya
DPoint = pya.DPoint
[docs]
class Port:
"""Base data structure for simulation ports.
Depending on your simulation type, these produce excitations, set potentials, or act as ideal RLC lumped elements.
"""
def __init__(
self,
number: int,
resistance: float = 50,
reactance: float = 0,
inductance: float = 0,
capacitance: float = 0,
face: int = 0,
junction: bool = False,
renormalization: float = 50,
):
"""
Args:
number: Port number.
resistance: Real part of impedance. Given in Ohms (:math:`\\Omega`).
reactance: Imaginary part of impedance. Given in Ohms (:math:`\\Omega`).
inductance: Inductance of the element. Given in Henrys (:math:`\\text{H}`).
capacitance: Capacitance of the element. Given in Farads (:math:`\\text{F}`).
face: Integer-valued face index for the port.
junction: Whether this port models a SQUID/Junction. Used in EPR calculations.
renormalization: Port renormalization in Ohms or None to not re-normalize the port.
"""
self.number = number
self.resistance = resistance
self.reactance = reactance
self.inductance = inductance
self.capacitance = capacitance
self.face = face
self.junction = junction
self.renormalization = renormalization
self.type = type(self).__name__
[docs]
def as_dict(self):
"""Returns attributes as a dictionary."""
return vars(self)
[docs]
class InternalPort(Port):
"""Data structure for ports inside the simulation area."""
def __init__(
self,
number: int,
signal_location: DPoint,
ground_location: DPoint = None,
resistance: float = 50,
reactance: float = 0,
inductance: float = 0,
capacitance: float = 0,
face: int = 0,
junction: bool = False,
etch_width: float = None,
floating: bool = False,
):
"""
Args:
number: Port number.
signal_location: Edge location for signal source.
ground_location: Edge location to connect signal to. Usually ground.
resistance: Real part of impedance. Given in Ohms (:math:`\\Omega`).
reactance: Imaginary part of impedance. Given in Ohms (:math:`\\Omega`).
inductance: Inductance of the element. Given in Henrys (:math:`\\text{H}`).
capacitance: Capacitance of the element. Given in Farads (:math:`\\text{F}`).
face: Integer-valued face index for the port.
junction: Whether this port models a SQUID/Junction. Used in EPR calculations.
etch_width: Width of a trace between signal_location and ground_location, on which the metal is etched away.
Useful when adding a lumped port on a waveguide.
floating: activate floating port -> does not force "ground side" to ground.
"""
super().__init__(number, resistance, reactance, inductance, capacitance, face, junction)
self.signal_location = signal_location
if ground_location is not None:
self.ground_location = ground_location
if etch_width is not None:
self.etch_width = etch_width
self.floating = floating
[docs]
def get_etch_polygon(self):
"""Returns polygon under which the metal should be etched away"""
try:
d = self.signal_location - self.ground_location
v = (0.5 * self.etch_width / d.length()) * pya.DVector(-d.y, d.x)
return pya.DPolygon(
[self.signal_location - v, self.signal_location + v, self.ground_location + v, self.ground_location - v]
)
except AttributeError:
return pya.DPolygon()
[docs]
class EdgePort(Port):
"""Data structure for ports at the edge of the simulation area."""
def __init__(
self,
number: int,
signal_location: DPoint,
resistance: float = 50,
reactance: float = 0,
inductance: float = 0,
capacitance: float = 0,
deembed_len: float = None,
face: int = 0,
junction: bool = False,
size=None,
deembed_cross_section: str = None,
):
"""
Args:
number: Port number.
signal_location: Edge location for signal source.
resistance: Real part of impedance. Given in Ohms (:math:`\\Omega`).
reactance: Imaginary part of impedance. Given in Ohms (:math:`\\Omega`).
inductance: Inductance of the element. Given in Henrys (:math:`\\text{H}`).
capacitance: Capacitance of the element. Given in Farads (:math:`\\text{F}`).
deembed_len: Port de-embedding length. Given in simulation units, usually microns (:math:`\\text{um}`).
face: Integer-valued face index for the port.
junction: Whether this port models a SQUID/Junction. Used in EPR calculations.
size: Width and height of the port to override Simulation.port_size. Optionally, the size can be set as a
list specifying the extensions from the center of the port to left, right, down and up, respectively.
deembed_cross_section: name of the port described by a cross-section
"""
super().__init__(number, resistance, reactance, inductance, capacitance, face, junction)
self.signal_location = signal_location
self.deembed_len = deembed_len
self.size = size
self.deembed_cross_section = deembed_cross_section