Palace Straight Dielectric Waveguide - Wave Ports¶

This notebook sets up a straight dielectric waveguide and runs a Palace driven simulation using waveport boundary conditions.

Build straight waveguide geometry¶

from ubcpdk import PDK, cells

PDK.activate()

c = cells.straight(length=10.0)

cc = c.copy()
cc.draw_ports()
cc

Configure Palace driven simulation¶

from gsim.palace import DrivenSim

sim = DrivenSim()
sim.set_output_dir("./palace-sim-straight-waveport")
sim.set_geometry(c)

sim.set_stack(
    substrate_thickness=2.0,
    add_oxide_dielectric=False,
    add_passivation_dielectric=False,
)

sim.set_numerical(
    solver_type="MUMPS",
    max_iterations=1,
    tolerance=1e-8,
)

for i, port in enumerate(c.ports):
    sim.add_wave_port(
        str(port.name),
        layer="core",
        z_margin=1.5,
        lateral_margin=1.5,
        max_size=False,
        mode=1,
        excited=(i == 0),
    )

sim.set_driven(fmin=190e12, fmax=200e12, num_points=21)

print(sim.validate_config())

Generate mesh¶

sim.set_airbox(
    margin_x=0.0,
    margin_y=2.0,
    z_above=0.5,
    z_below=0.5,
)

sim.mesh(
    preset="fine",
    refined_mesh_size=0.04,
    max_mesh_size=0.2,
    fmax=200e12,
)

sim.plot_mesh(
    style="solid",
    transparent_groups=["air__None"],
    interactive=True,
)

Run simulation¶

results = sim.run()

Plot S-parameters¶

results.plot_interactive()

results.plot_interactive(phase=True)