# 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.
#
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with this program. If not, see
# https://www.gnu.org/licenses/gpl-3.0.html.
#
# The software distribution should follow IQM trademark policy for open-source software
# (meetiqm.com/iqm-open-source-trademark-policy). IQM welcomes contributions to the code.
# Please see our contribution agreements for individuals (meetiqm.com/iqm-individual-contributor-license-agreement)
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from kqcircuits.elements.element import Element
from kqcircuits.pya_resolver import pya
from kqcircuits.util.geometry_helper import round_dpath_width
from kqcircuits.util.parameters import Param, pdt
[docs]
class WaveguideCoplanarStraight(Element):
"""The PCell declaration of a straight segment of a coplanar waveguide.
.. MARKERS_FOR_PNG 15,8 15,0
"""
l = Param(pdt.TypeDouble, "Length", 30)
add_metal = Param(pdt.TypeBoolean, "Add trace in base metal addition too", False)
ground_grid_in_trace = Param(pdt.TypeBoolean, "Add ground grid also to the waveguide", False)
[docs]
@staticmethod
def build_geometry(element, trans, l):
# Refpoint in the first end
# Left gap
pts = [
pya.DPoint(0, element.a / 2 + 0),
pya.DPoint(l, element.a / 2 + 0),
pya.DPoint(l, element.a / 2 + element.b),
pya.DPoint(0, element.a / 2 + element.b),
]
shape_1 = pya.DPolygon(pts)
element.cell.shapes(element.get_layer("base_metal_gap_wo_grid")).insert(trans * shape_1)
# Right gap
pts = [
pya.DPoint(0, -element.a / 2 + 0),
pya.DPoint(l, -element.a / 2 + 0),
pya.DPoint(l, -element.a / 2 - element.b),
pya.DPoint(0, -element.a / 2 - element.b),
]
shape_2 = pya.DPolygon(pts)
element.cell.shapes(element.get_layer("base_metal_gap_wo_grid")).insert(trans * shape_2)
# Protection layer
if element.ground_grid_in_trace:
element.add_protection(trans * shape_1.sized(1))
element.add_protection(trans * shape_2.sized(1))
else:
w = element.a / 2 + element.b + element.margin
pts = [pya.DPoint(0, -w), pya.DPoint(l, -w), pya.DPoint(l, w), pya.DPoint(0, w)]
element.add_protection(trans * pya.DPolygon(pts))
# Waveguide length
pts = [
pya.DPoint(0, 0),
pya.DPoint(l, 0),
]
shape = round_dpath_width(pya.DPath(pts, element.a), element.layout.dbu)
element.cell.shapes(element.get_layer("waveguide_path")).insert(trans * shape)
if element.add_metal:
element.cell.shapes(element.get_layer("base_metal_addition")).insert(trans * shape)
[docs]
def build(self):
WaveguideCoplanarStraight.build_geometry(self, pya.DTrans(), self.l)