Source code for kqcircuits.elements.capacitive_x_coupler

# This code is part of KQCircuits
# Copyright (C) 2023 IQM Finland Oy
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from math import sqrt
from kqcircuits.util.parameters import Param, pdt, add_parameters_from, pya
from kqcircuits.elements.element import Element

from kqcircuits.elements.waveguide_composite import WaveguideComposite
from kqcircuits.elements.waveguide_composite import Node
from kqcircuits.elements.finger_capacitor_square import FingerCapacitorSquare
from kqcircuits.elements.waveguide_coplanar_splitter import WaveguideCoplanarSplitter
from kqcircuits.elements.finger_capacitor_taper import FingerCapacitorTaper
from kqcircuits.util.refpoints import RefpointToEdgePort


[docs]@add_parameters_from(FingerCapacitorSquare, finger_gap_end=3) @add_parameters_from(FingerCapacitorTaper, finger_width=10, finger_number=2, finger_gap=3) class CapacitiveXCoupler(Element): """ Capacitive coupler for testing FEM computations. """ x_coupler_length = Param(pdt.TypeDouble, "Length of Capacitive X Coupler", 500) x_coupler_height = Param(pdt.TypeDouble, "Height of Capacitive X Coupler", 500) x_coupler_variant = Param(pdt.TypeString, "Coupler variant, either (+) or (x)", "+", choices=["+", "x"]) remove_capacitors = Param(pdt.TypeBoolean, "Remove capacitors from the X Coupler", False)
[docs] def build(self): length = self.x_coupler_length height = self.x_coupler_height if length > height: center = height input_length = (length - center) / 2.0 else: center = length input_length = (height - center) / 2.0 p0 = (0, 0) if self.x_coupler_variant == "x": if height > length: p11 = (-center / 2.0, -input_length - length / 2.0) p12 = (-length / 2.0, -center / 2.0) p13 = (-length / 4.0, -center / 4.0) else: p11 = (-input_length - center / 2.0, -height / 2.0) p12 = (-center / 2.0, -height / 2.0) p13 = (-center / 4.0, -height / 4.0) p21 = (-p11[0], p11[1]) p22 = (-p12[0], p12[1]) p23 = (-p13[0], p13[1]) p31 = (-p11[0], -p11[1]) p32 = (-p12[0], -p12[1]) p33 = (-p13[0], -p13[1]) p41 = (p11[0], -p11[1]) p42 = (p12[0], -p12[1]) p43 = (p13[0], -p13[1]) p02 = ((self.a / 2 + self.b) / sqrt(2), (-self.a / 2 - self.b) / sqrt(2)) p04 = ((-self.a / 2 - self.b) / sqrt(2), (self.a / 2 + self.b) / sqrt(2)) elif self.x_coupler_variant == "+": p11 = (0.0, -height / 2.0) p12 = (0.0, -height / 3.0) p13 = (0.0, -height / 4.0) p21 = (length / 2.0, 0.0) p22 = (length / 3.0, 0.0) p23 = (length / 4.0, 0.0) p31 = (0.0, -p11[1]) p32 = (0.0, -p12[1]) p33 = (0.0, -p13[1]) p41 = (-p21[0], 0.0) p42 = (-p22[0], 0.0) p43 = (-p23[0], 0.0) p02 = (self.a / 2 + self.b, 0.0) p04 = (-self.a / 2 - self.b, 0.0) self.refpoints["p11"] = pya.DPoint(*p11) self.refpoints["p21"] = pya.DPoint(*p21) self.refpoints["p31"] = pya.DPoint(*p31) self.refpoints["p41"] = pya.DPoint(*p41) def _add_capacitor_node(p): return Node( p, FingerCapacitorSquare, finger_number=self.finger_number, finger_width=self.finger_width, finger_gap_end=self.finger_gap_end, finger_gap=self.finger_gap, a2=self.a, b2=self.b, a=self.a, b=self.b, ground_padding=self.b, ) splitter_port_length = self.a / 2 + self.b nodes1 = [ Node(p11), Node(p12), _add_capacitor_node(p13), Node( p0, WaveguideCoplanarSplitter, angles=[0, 180, 90, 270], lengths=4 * [splitter_port_length], a=self.a, b=self.b, ), _add_capacitor_node(p33), Node(p32), Node(p31), ] nodes2 = [Node(p41), Node(p42), _add_capacitor_node(p43), Node(p04)] nodes3 = [Node(p21), Node(p22), _add_capacitor_node(p23), Node(p02)] if self.remove_capacitors: nodes1.pop(4) nodes1.pop(2) nodes2.pop(2) nodes3.pop(2) if self.x_coupler_variant == "x" and length == height: nodes1.pop(1) nodes1.pop(-1) nodes2.pop(1) nodes3.pop(1) self.insert_cell(WaveguideComposite, nodes=nodes1) self.insert_cell(WaveguideComposite, nodes=nodes2) self.insert_cell(WaveguideComposite, nodes=nodes3)
[docs] @classmethod def get_sim_ports(cls, simulation): # pylint: disable=unused-argument return [ RefpointToEdgePort("p11"), RefpointToEdgePort("p21"), RefpointToEdgePort("p31"), RefpointToEdgePort("p41"), ]