# 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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#
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# (meetiqm.com/developers/osstmpolicy). IQM welcomes contributions to the code. Please see our contribution agreements
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from kqcircuits.elements.element import Element
from kqcircuits.pya_resolver import pya
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]
def build(self):
# Refpoint in the first end
# Left gap
pts = [
pya.DPoint(0, self.a / 2 + 0),
pya.DPoint(self.l, self.a / 2 + 0),
pya.DPoint(self.l, self.a / 2 + self.b),
pya.DPoint(0, self.a / 2 + self.b),
]
shape_1 = pya.DPolygon(pts)
self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(shape_1)
# Right gap
pts = [
pya.DPoint(0, -self.a / 2 + 0),
pya.DPoint(self.l, -self.a / 2 + 0),
pya.DPoint(self.l, -self.a / 2 - self.b),
pya.DPoint(0, -self.a / 2 - self.b),
]
shape_2 = pya.DPolygon(pts)
self.cell.shapes(self.get_layer("base_metal_gap_wo_grid")).insert(shape_2)
# Protection layer
if self.ground_grid_in_trace:
self.add_protection(shape_1.sized(1))
self.add_protection(shape_2.sized(1))
else:
w = self.a / 2 + self.b + self.margin
pts = [pya.DPoint(0, -w), pya.DPoint(self.l, -w), pya.DPoint(self.l, w), pya.DPoint(0, w)]
self.add_protection(pya.DPolygon(pts))
# Waveguide length
pts = [
pya.DPoint(0, 0),
pya.DPoint(self.l, 0),
]
shape = pya.DPath(pts, self.a)
self.cell.shapes(self.get_layer("waveguide_path")).insert(shape)
if self.add_metal:
self.cell.shapes(self.get_layer("base_metal_addition")).insert(shape)