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gprMax/user_libs/antennas/GSSI.py
Craig Warren 253e3a04f7 Copyright year update.
2020-02-13 17:12:09 +00:00

788 行
44 KiB
Python
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# Copyright (C) 2015-2020, Craig Warren
#
# This module is licensed under the Creative Commons Attribution-ShareAlike 4.0 International License.
# To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/4.0/.
#
# Please use the attribution at http://dx.doi.org/10.1190/1.3548506
import gprMax
from gprMax.exceptions import CmdInputError
def antenna_like_GSSI_1500(x, y, z, resolution=0.001):
"""Inserts a description of an antenna similar to the GSSI 1.5GHz antenna.
Can be used with 1mm (default) or 2mm spatial resolution. The external
dimensions of the antenna are 170x108x45mm. One output point is defined
between the arms of the receiver bowtie. The bowties are aligned with
the y axis so the output is the y component of the electric field.
Args:
x, y, z (float): Coordinates of a location in the model to insert the
antenna. Coordinates are relative to the geometric
centre of the antenna in the x-y plane and the
bottom of the antenna skid in the z direction.
resolution (float): Spatial resolution for the antenna model.
Returns:
scene_objects (list): All model objects that will be part of a scene.
"""
# All model objects that will be returned by function
scene_objects = []
# Antenna geometry properties
casesize = (0.170, 0.108, 0.043)
casethickness = 0.002
shieldthickness = 0.002
foamsurroundthickness = 0.003
pcbthickness = 0.002
skidthickness = 0.004
bowtiebase = 0.022
bowtieheight = 0.014
patchheight = 0.015
x = x - (casesize[0] / 2)
y = y - (casesize[1] / 2)
# Coordinates of source excitation point in antenna
tx = x + 0.114, y + 0.053, z + skidthickness
if resolution == 0.001:
dx = 0.001
dy = 0.001
dz = 0.001
elif resolution == 0.002:
dx = 0.002
dy = 0.002
dz = 0.002
foamsurroundthickness = 0.002
patchheight = 0.016
tx = x + 0.114, y + 0.052, z + skidthickness
else:
raise CmdInputError('This antenna module can only be used with a spatial discretisation of 1mm or 2mm')
# Specify optimisation state of antenna model
optstate = ['WarrenThesis', 'DebyeAbsorber', 'GiannakisPaper']
optstate = optstate[0]
if optstate == 'WarrenThesis':
# Original optimised values from http://hdl.handle.net/1842/4074
excitationfreq = 1.71e9
sourceresistance = 230 # Correction for old (< 123) GprMax3D bug (optimised to 4)
rxres = 925 # Resistance at Rx bowtie
absorber1 = gprMax.Material(er=1.58, se=0.428, mr=1, sm=0, id='absorber1')
absorber2 = gprMax.Material(er=3, se=0, mr=1, sm=0, id='absorber2') # Foam modelled as PCB material
pcb = gprMax.Material(er=3, se=0, mr=1, sm=0, id='pcb')
hdpe = gprMax.Material(er=2.35, se=0, mr=1, sm=0, id='hdpe')
rxres = gprMax.Material(er=3, se=(1 / rxres) * (dy / (dx * dz)), mr=1, sm=0, id='rxres')
scene_objects.extend((absorber1, absorber2, pcb, hdpe, rxres))
elif optstate == 'DebyeAbsorber':
# Same values as WarrenThesis but uses dispersive absorber properties for Eccosorb LS22
excitationfreq = 1.71e9
sourceresistance = 230 # Correction for old (< 123) GprMax3D bug (optimised to 4)
rxres = 925 # Resistance at Rx bowtie
absorber1 = gprMax.Material(er=1, se=0, mr=1, sm=0, id='absorber1')
# Eccosorb LS22 3-pole Debye model (https://bitbucket.org/uoyaeg/aegboxts/wiki/Home)
absorber1_disp = gprMax.AddDebyeDispersion(poles=3, er_delta=[3.7733, 3.14418, 20.2441],
tau=[1.00723e-11, 1.55686e-10, 3.44129e-10],
material_ids=['absorber1'])
absorber2 = gprMax.Material(er=3, se=0, mr=1, sm=0, id='absorber2') # Foam modelled as PCB material
pcb = gprMax.Material(er=3, se=0, mr=1, sm=0, id='pcb')
hdpe = gprMax.Material(er=2.35, se=0, mr=1, sm=0, id='hdpe')
rxres = gprMax.Material(er=3, se=(1 / rxres) * (dy / (dx * dz)), mr=1, sm=0, id='rxres')
scene_objects.extend((absorber1, absorber1_disp, absorber2, pcb, hdpe, rxres))
elif optstate == 'GiannakisPaper':
# Further optimised values from https://doi.org/10.1109/TGRS.2018.2869027
sourceresistance = 195
absorber1 = gprMax.Material(er=3.96, se=0.31, mr=1, sm=0, id='absorber1')
absorber2 = gprMax.Material(er=1.05, se=1.01, mr=1, sm=0, id='absorber2')
pcb = gprMax.Material(er=1.37, se=0.0002, mr=1, sm=0, id='pcb')
hdpe = gprMax.Material(er=1.99, se=0.013, mr=1, sm=0, id='hdpe')
scene_objects.extend((absorber1, absorber2, pcb, hdpe))
# Antenna geometry
# Plastic case
b1 = gprMax.Box(p1=(x, y, z + skidthickness),
p2=(x + casesize[0], y + casesize[1], z + skidthickness + casesize[2]),
material_id='hdpe')
b2 = gprMax.Box(p1=(x + casethickness, y + casethickness, z + skidthickness),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + skidthickness + casesize[2] - casethickness),
material_id='free_space')
# Metallic enclosure
b3 = gprMax.Box(p1=(x + 0.025, y + casethickness, z + skidthickness),
p2=(x + casesize[0] - 0.025, y + casesize[1] - casethickness,
z + skidthickness + 0.027), material_id='pec')
# Absorber material (absorber1) and foam (absorber2) around edge of absorber
b4 = gprMax.Box(p1=(x + 0.025 + shieldthickness, y + casethickness + shieldthickness,
z + skidthickness), p2=(x + 0.025 + shieldthickness + 0.057,
y + casesize[1] - casethickness - shieldthickness,
z + skidthickness + 0.027 - shieldthickness - 0.001),
material_id='absorber2')
b5 = gprMax.Box(p1=(x + 0.025 + shieldthickness + foamsurroundthickness,
y + casethickness + shieldthickness + foamsurroundthickness,
z + skidthickness),
p2=(x + 0.025 + shieldthickness + 0.057 - foamsurroundthickness,
y + casesize[1] - casethickness - shieldthickness - foamsurroundthickness,
z + skidthickness + 0.027 - shieldthickness),
material_id='absorber1')
b6 = gprMax.Box(p1=(x + 0.086, y + casethickness + shieldthickness, z + skidthickness),
p2=(x + 0.086 + 0.057, y + casesize[1] - casethickness - shieldthickness,
z + skidthickness + 0.027 - shieldthickness - 0.001),
material_id='absorber2')
b7 = gprMax.Box(p1=(x + 0.086 + foamsurroundthickness,
y + casethickness + shieldthickness + foamsurroundthickness,
z + skidthickness),
p2=(x + 0.086 + 0.057 - foamsurroundthickness,
y + casesize[1] - casethickness - shieldthickness - foamsurroundthickness,
z + skidthickness + 0.027 - shieldthickness),
material_id='absorber1')
# PCB
b8 = gprMax.Box(p1=(x + 0.025 + shieldthickness + foamsurroundthickness,
y + casethickness + shieldthickness + foamsurroundthickness,
z + skidthickness),
p2=(x + 0.086 - shieldthickness - foamsurroundthickness,
y + casesize[1] - casethickness - shieldthickness - foamsurroundthickness,
z + skidthickness + pcbthickness), material_id='pcb')
b9 = gprMax.Box(p1=(x + 0.086 + foamsurroundthickness,
y + casethickness + shieldthickness + foamsurroundthickness,
z + skidthickness),
p2=(x + 0.086 + 0.057 - foamsurroundthickness,
y + casesize[1] - casethickness - shieldthickness - foamsurroundthickness,
z + skidthickness + pcbthickness), material_id='pcb')
scene_objects.extend((b1, b2, b3, b4, b5, b6, b7, b8, b9))
# PCB components
if resolution == 0.001:
# Rx & Tx bowties
a = 0
b = 0
while b < 13:
p1 = gprMax.Plate(p1=(x + 0.045 + a * dx, y + 0.039 + b * dx, z + skidthickness),
p2=(x + 0.065 - a * dx, y + 0.039 + b * dx + dy, z + skidthickness),
material_id='pec')
p2 = gprMax.Plate(p1=(x + 0.045 + a * dx, y + 0.067 - b * dx, z + skidthickness),
p2=(x + 0.065 - a * dx, y + 0.067 - b * dx + dy, z + skidthickness),
material_id='pec')
p3 = gprMax.Plate(p1=(x + 0.104 + a * dx, y + 0.039 + b * dx, z + skidthickness),
p2=(x + 0.124 - a * dx, y + 0.039 + b * dx + dy, z + skidthickness),
material_id='pec')
p4 = gprMax.Plate(p1=(x + 0.104 + a * dx, y + 0.067 - b * dx, z + skidthickness),
p2=(x + 0.124 - a * dx, y + 0.067 - b * dx + dy, z + skidthickness),
material_id='pec')
scene_objects.extend((p1, p2, p3, p4))
b += 1
if a == 2 or a == 4 or a == 7:
p5 = gprMax.Plate(p1=(x + 0.045 + a * dx, y + 0.039 + b * dx, z + skidthickness),
p2=(x + 0.065 - a * dx, y + 0.039 + b * dx + dy, z + skidthickness),
material_id='pec')
p6 = gprMax.Plate(p1=(x + 0.045 + a * dx, y + 0.067 - b * dx, z + skidthickness),
p2=(x + 0.065 - a * dx, y + 0.067 - b * dx + dy, z + skidthickness),
material_id='pec')
p7 = gprMax.Plate(p1=(x + 0.104 + a * dx, y + 0.039 + b * dx, z + skidthickness),
p2=(x + 0.124 - a * dx, y + 0.039 + b * dx + dy, z + skidthickness),
material_id='pec')
p8 = gprMax.Plate(p1=(x + 0.104 + a * dx, y + 0.067 - b * dx, z + skidthickness),
p2=(x + 0.124 - a * dx, y + 0.067 - b * dx + dy, z + skidthickness),
material_id='pec')
b += 1
scene_objects.extend((p5, p6, p7, p8))
a += 1
# Rx extension section (upper y)
p9 = gprMax.Plate(p1=(x + 0.044, y + 0.068, z + skidthickness),
p2=(x + 0.044 + bowtiebase, y + 0.068 + patchheight, z + skidthickness),
material_id='pec')
# Tx extension section (upper y)
p10 = gprMax.Plate(p1=(x + 0.103, y + 0.068, z + skidthickness),
p2=(x + 0.103 + bowtiebase, y + 0.068 + patchheight, z + skidthickness),
material_id='pec')
scene_objects.extend((p9, p10))
# Edges that represent wire between bowtie halves in 1mm model
e1 = gprMax.Edge(p1=(tx[0] - 0.059, tx[1] - dy, tx[2]),
p2=(tx[0] - 0.059, tx[1], tx[2]), material_id='pec')
e2 = gprMax.Edge(p1=(tx[0] - 0.059, tx[1] + dy, tx[2]),
p2=(tx[0] - 0.059, tx[1] + 0.002, tx[2]), material_id='pec')
e3 = gprMax.Edge(p1=(tx[0], tx[1] - dy, tx[2]),
p2=(tx[0], tx[1], tx[2]), material_id='pec')
e4 = gprMax.Edge(p1=(tx[0], tx[1] + dz, tx[2]),
p2=(tx[0], tx[1] + 0.002, tx[2]), material_id='pec')
scene_objects.extend((e1, e2, e3, e4))
elif resolution == 0.002:
# Rx & Tx bowties
for a in range(0, 6):
p1 = gprMax.Plate(p1=(x + 0.044 + a * dx, y + 0.040 + a * dx, z + skidthickness),
p2=(x + 0.066 - a * dx, y + 0.040 + a * dx + dy, z + skidthickness),
material_id='pec')
p2 = gprMax.Plate(p1=(x + 0.044 + a * dx, y + 0.064 - a * dx, z + skidthickness),
p2=(x + 0.066 - a * dx, y + 0.064 - a * dx + dy, z + skidthickness),
material_id='pec')
p3 = gprMax.Plate(p1=(x + 0.103 + a * dx, y + 0.040 + a * dx, z + skidthickness),
p2=(x + 0.125 - a * dx, y + 0.040 + a * dx + dy, z + skidthickness),
material_id='pec')
p4 = gprMax.Plate(p1=(x + 0.103 + a * dx, y + 0.064 - a * dx, z + skidthickness),
p2=(x + 0.125 - a * dx, y + 0.064 - a * dx + dy, z + skidthickness),
material_id='pec')
# Rx extension section (upper y)
p5 = gprMax.Plate(p1=(x + 0.044, y + 0.066, z + skidthickness),
p2=(x + 0.044 + bowtiebase, y + 0.066 + patchheight, z + skidthickness),
material_id='pec')
# Tx extension section (upper y)
p6 = gprMax.Plate(p1=(x + 0.103, y + 0.066, z + skidthickness),
p2=(x + 0.103 + bowtiebase, y + 0.066 + patchheight, z + skidthickness),
material_id='pec')
scene_objects.extend((p1, p2, p3, p4, p5, p6))
# Rx extension section (lower y)
p11 = gprMax.Plate(p1=(x + 0.044, y + 0.024, z + skidthickness),
p2=(x + 0.044 + bowtiebase, y + 0.024 + patchheight, z + skidthickness),
material_id='pec')
# Tx extension section (lower y)
p12 = gprMax.Plate(p1=(x + 0.103, y + 0.024, z + skidthickness),
p2=(x + 0.103 + bowtiebase, y + 0.024 + patchheight, z + skidthickness),
material_id='pec')
scene_objects.extend((p11, p12))
# Skid
b10 = gprMax.Box(p1=(x, y, z), p2=(x + casesize[0], y + casesize[1], z + skidthickness),
material_id='hdpe')
scene_objects.append(b10)
# Geometry views
gv1 = gprMax.GeometryView(p1=(x - dx, y - dy, z - dz), p2=(x + casesize[0] + dx,
y + casesize[1] + dy, z + skidthickness + casesize[2] + dz),
dl=(dx, dy, dz), filename='antenna_like_GSSI_1500',
output_type='n')
gv2 = gprMax.GeometryView(p1=(x, y, z), p2=(x + casesize[0], y + casesize[1], z + 0.010),
dl=(dx, dy, dz), filename='antenna_like_GSSI_1500_pcb',
output_type='f')
# scene_objects.extend((gv1, gv2))
# Excitation
if optstate == 'WarrenThesis' or optstate == 'DebyeAbsorber':
# Gaussian pulse
w1 = gprMax.Waveform(wave_type='gaussian', amp=1, freq=excitationfreq, id='my_gaussian')
vs1 = gprMax.VoltageSource(polarisation='y', p1=(tx[0], tx[1], tx[2]), resistance=sourceresistance, waveform_id='my_gaussian')
scene_objects.extend((w1, vs1))
elif optstate == 'GiannakisPaper':
# Optimised custom pulse
exc1 = gprMax.ExcitationFile(filepath='../user_libs/antennas/GSSI1p5optpulse.txt', kind='linear', fill_value='extrapolate')
vs1 = gprMax.VoltageSource(polarisation='y', p1=(tx[0], tx[1], tx[2]), resistance=sourceresistance, waveform_id='GSSI1p5optpulse')
scene_objects.extend((exc1, vs1))
# Output point - receiver bowtie
if resolution == 0.001:
if optstate == 'WarrenThesis' or optstate == 'DebyeAbsorber':
e1 = gprMax.Edge(p1=(tx[0] - 0.059, tx[1], tx[2]),
p2=(tx[0] - 0.059, tx[1] + dy, tx[2]),
material_id='rxres')
scene_objects.append(e1)
r1 = gprMax.Rx(p1=(tx[0] - 0.059, tx[1], tx[2]), id='rxbowtie',
outputs='Ey')
scene_objects.append(r1)
elif resolution == 0.002:
if optstate == 'WarrenThesis' or optstate == 'DebyeAbsorber':
e1 = gprMax.Edge(p1=(tx[0] - 0.060, tx[1], tx[2]),
p2=(tx[0] - 0.060, tx[1] + dy, tx[2]),
material_id='rxres')
scene_objects.append(e1)
r1 = gprMax.Rx(p1=(tx[0] - 0.060, tx[1], tx[2]), id='rxbowtie',
outputs='Ey')
scene_objects.append(r1)
return scene_objects
def antenna_like_GSSI_400(x, y, z, resolution=0.001):
"""Inserts a description of an antenna similar to the GSSI 400MHz antenna.
Can be used with 0.5mm, 1mm (default) or 2mm spatial resolution.
The external dimensions of the antenna are 300x300x178mm.
One output point is defined between the arms of the receiver bowtie.
The bowties are aligned with the y axis so the output is the y component
of the electric field.
Args:
x, y, z (float): Coordinates of a location in the model to insert the antenna. Coordinates are relative to the geometric centre of the antenna in the x-y plane and the bottom of the antenna skid in the z direction.
resolution (float): Spatial resolution for the antenna model.
Returns:
scene_objects (list): All model objects that will be part of a scene.
"""
# All model objects that will be returned by function
scene_objects = []
# Antenna geometry properties
casesize = (0.3, 0.3, 0.178) # original
casethickness = 0.002
shieldthickness = 0.002
foamsurroundthickness = 0.003
pcbthickness = 0.002
bowtiebase = 0.06
bowtieheight = 0.06 # original 0.056
patchheight = 0.06 # original 0.056
metalboxheight = 0.089
metalmiddleplateheight = 0.11
smooth_dec = 'yes' # choose to use dielectric smoothing or not
src_type = 'voltage_source' # # source type. "voltage_source" or "transmission_line"
excitationfreq = 0.39239891e9 # GHz
sourceresistance = 111.59927 # Ohms
receiverresistance = sourceresistance # Ohms
absorberEr = 1.1
absorbersig = 0.062034689
pcber = 2.35
hdper = 2.35
skidthickness = 0.01
x = x - (casesize[0] / 2)
y = y - (casesize[1] / 2)
# Coordinates of source excitation point in antenna
tx = x + 0.01 + 0.005 + 0.056, y + casethickness + 0.005 + 0.143, z + skidthickness
if resolution == 0.0005:
dx = 0.0005
dy = 0.0005
dz = 0.0005
tx = x + 0.01 + 0.005 + 0.056, y + casethickness + 0.005 + 0.1435, z + skidthickness
elif resolution == 0.001:
dx = 0.001
dy = 0.001
dz = 0.001
elif resolution == 0.002:
dx = 0.002
dy = 0.002
dz = 0.002
foamsurroundthickness = 0.002
metalboxheight = 0.088
tx = x + 0.01 + 0.004 + 0.056, y + casethickness + 0.005 + 0.143 - 0.002, z + skidthickness
else:
raise CmdInputError('This antenna module can only be used with a spatial discretisation of 0.5mm, 1mm, 2mm')
# Material definitions
absorber = gprMax.Material(er=absorberEr, se=absorbersig, mr=1, sm=0, id='absorber')
pcb = gprMax.Material(er=pcber, se=0, mr=1, sm=0, id='pcb')
hdpe = gprMax.Material(er=hdper, se=0, mr=1, sm=0, id='hdpe')
scene_objects.extend((absorber, pcb, hdpe))
# Antenna geometry
if smooth_dec == 'yes':
# Plastic case
b1 = gprMax.Box(p1=(x, y, z + skidthickness - 0.002),
p2=(x + casesize[0], y + casesize[1], z + casesize[2]),
material_id='hdpe')
b2 = gprMax.Box(p1=(x + casethickness, y + casethickness, z + skidthickness - 0.002),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + casesize[2] - casethickness), material_id='free_space')
# Metallic enclosure
b3 = gprMax.Box(p1=(x + casethickness, y + casethickness, z + skidthickness +
(metalmiddleplateheight - metalboxheight)),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + skidthickness + (metalmiddleplateheight - metalboxheight) +
metalboxheight), material_id='pec')
# Absorber, and foam (modelled as PCB material) around edge of absorber
b4 = gprMax.Box(p1=(x + casethickness, y + casethickness, z + skidthickness),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + skidthickness + (metalmiddleplateheight - metalboxheight)),
material_id='absorber')
b5 = gprMax.Box(p1=(x + casethickness + shieldthickness, y + casethickness +
shieldthickness, z + skidthickness + (metalmiddleplateheight - metalboxheight)),
p2=(x + casesize[0] - casethickness - shieldthickness,
y + casesize[1] - casethickness - shieldthickness,
z + skidthickness - shieldthickness + metalmiddleplateheight),
material_id='absorber')
scene_objects.extend((b1, b2, b3, b4, b5))
# PCB
if resolution == 0.0005:
b6 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.018, y + casethickness +
0.005 + 0.0235, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.034 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb')
b7 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.178, y + casethickness +
0.005 + 0.0235, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.194 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb')
scene_objects.extend((b6, b7))
elif resolution == 0.001:
b6 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.018, y + casethickness + 0.005 + 0.023,
z + skidthickness), p2=(x + 0.01 + 0.005 + 0.034 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb')
b7 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.178, y + casethickness + 0.005 + 0.023,
z + skidthickness), p2=(x + 0.01 + 0.005 + 0.194 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb')
scene_objects.extend((b6, b7))
elif resolution == 0.002:
b6 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.017, y + casethickness + 0.005 + 0.021,
z + skidthickness), p2=(x + 0.01 + 0.005 + 0.033 + bowtiebase,
y + casethickness + 0.006 + 0.202 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb')
b7 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.179, y + casethickness + 0.005 + 0.021,
z + skidthickness), p2=(x + 0.01 + 0.005 + 0.195 + bowtiebase,
y + casethickness + 0.006 + 0.202 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb')
scene_objects.extend((b6, b7))
elif smooth_dec == 'no':
# Plastic case
b8 = gprMax.Box(p1=(x, y, z + skidthickness - 0.002),
p2=(x + casesize[0], y + casesize[1], z + casesize[2]),
material_id='hdpe', averaging='n')
b9 = gprMax.Box(p1=(x + casethickness, y + casethickness, z + skidthickness - 0.002),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + casesize[2] - casethickness), material_id='free_space',
averaging='n')
# Metallic enclosure
b10 = gprMax.Box(p1=(x + casethickness, y + casethickness,
z + skidthickness + (metalmiddleplateheight - metalboxheight)),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + skidthickness + (metalmiddleplateheight - metalboxheight) +
metalboxheight), material_id='pec')
# Absorber, and foam (modelled as PCB material) around edge of absorber
b11 = gprMax.Box(p1=(x + casethickness, y + casethickness, z + skidthickness),
p2=(x + casesize[0] - casethickness, y + casesize[1] - casethickness,
z + skidthickness + (metalmiddleplateheight - metalboxheight)),
material_id='absorber', averaging='n')
b12 = gprMax.Box(p1=(x + casethickness + shieldthickness,
y + casethickness + shieldthickness,
z + skidthickness + (metalmiddleplateheight - metalboxheight)),
p2=(x + casesize[0] - casethickness - shieldthickness,
y + casesize[1] - casethickness - shieldthickness,
z + skidthickness - shieldthickness + metalmiddleplateheight),
material_id='absorber', averaging='n')
scene_objects.extend((b8, b9, b10, b11, b12))
# PCB
if resolution == 0.0005:
b13 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.018,
y + casethickness + 0.005 + 0.0235, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.034 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb',
averaging='n')
b14 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.178,
y + casethickness + 0.005 + 0.0235, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.194 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb',
averaging='n')
scene_objects.extend((b13, b14))
elif resolution == 0.001:
b13 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.018,
y + casethickness + 0.005 + 0.023, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.034 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb',
averaging='n')
b14 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.178,
y + casethickness + 0.005 + 0.023, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.194 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb',
averaging='n')
scene_objects.extend((b13, b14))
elif resolution == 0.002:
b13 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.017,
y + casethickness + 0.005 + 0.021, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.033 + bowtiebase,
y + casethickness + 0.006 + 0.202 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb',
averaging='n')
b14 = gprMax.Box(p1=(x + 0.01 + 0.005 + 0.179,
y + casethickness + 0.005 + 0.021, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.195 + bowtiebase,
y + casethickness + 0.006 + 0.202 + patchheight,
z + skidthickness + pcbthickness), material_id='pcb',
averaging='n')
scene_objects.extend((b13, b14))
# PCB components
# My own bowties with triangle commands
if resolution == 0.0005:
# "left" side
# extension plates
p1 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.0235, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.0235 + patchheight,
z + skidthickness), material_id='pec')
p2 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness), material_id='pec')
# triangles
t1 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.0835, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.0835, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.026 + (bowtiebase/2),
y + casethickness + 0.005 + 0.0835 + bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
t2 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.026 + (bowtiebase/2),
y + casethickness + 0.005 + 0.204 - bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
# "right" side
p3 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.0235, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.0235 + patchheight,
z + skidthickness), material_id='pec')
p4 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness), material_id='pec')
# triangles
t3 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.0835, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.0835, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.186 + (bowtiebase/2),
y + casethickness + 0.005 + 0.0835 + bowtieheight,
z + skidthickness), thickness=0, material_ID='pec')
t4 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.186 + (bowtiebase/2),
y + casethickness + 0.005 + 0.204 - bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
# Edges that represent wire between bowtie halves in 1mm model
e1 = gprMax.Edge(p1=(tx[0] + 0.16, tx[1] - dy, tx[2]),
p2=(tx[0] + 0.16, tx[1], tx[2]), material_id='pec')
e2 = gprMax.Edge(p1=(tx[0] + 0.16, tx[1] + dy, tx[2]),
p2=(tx[0] + 0.16, tx[1] + 2*dy, tx[2]), material_id='pec')
e3 = gprMax.Edge(p1=(tx[0], tx[1] - dy, tx[2]),
p2=(tx[0], tx[1], tx[2]), material_id='pec')
e4 = gprMax.Edge(p1=(tx[0], tx[1] + dy, tx[2]),
p2=(tx[0], tx[1] + 2*dy, tx[2]), material_id='pec')
scene_objects.extend((p1, p2, t1, t2, p3, p4, t3, t4, e1, e2, e3, e4))
elif resolution == 0.001:
# "left" side
# extension plates
p1 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.023, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.023 + patchheight,
z + skidthickness), material_id='pec')
p2 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness), material_id='pec')
# triangles
t1 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.083, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.083, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.026 + (bowtiebase/2),
y + casethickness + 0.005 + 0.083 + bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
t2 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.026,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.026 + bowtiebase,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.026 + (bowtiebase/2),
y + casethickness + 0.005 + 0.204 - bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
# "right" side
p3 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.023, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.023 + patchheight,
z + skidthickness), material_id='pec')
p4 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.204 + patchheight,
z + skidthickness), material_id='pec')
# triangles
t3 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.083, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.083, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.186 + (bowtiebase/2),
y + casethickness + 0.005 + 0.083 + bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
t4 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.186,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.186 + bowtiebase,
y + casethickness + 0.005 + 0.204, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.186 + (bowtiebase/2),
y + casethickness + 0.005 + 0.204 - bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
# Edges that represent wire between bowtie halves in 1mm model
e1 = gprMax.Edge(p1=(tx[0] + 0.16, tx[1] - dy, tx[2]),
p2=(tx[0] + 0.16, tx[1], tx[2]), material_id='pec')
e2 = gprMax.Edge(p1=(tx[0] + 0.16, tx[1] + dy, tx[2]),
p2=(tx[0] + 0.16, tx[1] + 2*dy, tx[2]), material_id='pec')
e3 = gprMax.Edge(p1=(tx[0], tx[1] - dy, tx[2]),
p2=(tx[0], tx[1], tx[2]), material_id='pec')
e4 = gprMax.Edge(p1=(tx[0], tx[1] + dy, tx[2]),
p2=(tx[0], tx[1] + 2*dy, tx[2]), material_id='pec')
scene_objects.extend((p1, p2, t1, t2, p3, p4, t3, t4, e1, e2, e3, e4))
elif resolution == 0.002:
# "left" side
# extension plates
p1 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.025,
y + casethickness + 0.005 + 0.021, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.025 + bowtiebase,
y + casethickness + 0.005 + 0.021 + patchheight,
z + skidthickness), material_id='pec')
p2 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.025,
y + casethickness + 0.005 + 0.203, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.025 + bowtiebase,
y + casethickness + 0.005 + 0.203 + patchheight,
z + skidthickness), material_id='pec')
# triangles
t1 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.025,
y + casethickness + 0.005 + 0.081, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.025 + bowtiebase,
y + casethickness + 0.005 + 0.081, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.025 + (bowtiebase/2),
y + casethickness + 0.005 + 0.081 + bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
t2 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.025,
y + casethickness + 0.005 + 0.203, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.025 + bowtiebase,
y + casethickness + 0.005 + 0.203, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.025 + (bowtiebase/2),
y + casethickness + 0.005 + 0.203 - bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
# "right" side
p3 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.187,
y + casethickness + 0.005 + 0.021, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.187 + bowtiebase,
y + casethickness + 0.005 + 0.021 + patchheight,
z + skidthickness), material_id='pec')
p4 = gprMax.Plate(p1=(x + 0.01 + 0.005 + 0.187,
y + casethickness + 0.005 + 0.203, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.187 + bowtiebase,
y + casethickness + 0.005 + 0.203 + patchheight,
z + skidthickness), material_id='pec')
# triangles
t3 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.187,
y + casethickness + 0.005 + 0.081, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.187 + bowtiebase,
y + casethickness + 0.005 + 0.081, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.187 + (bowtiebase/2),
y + casethickness + 0.005 + 0.081 + bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
t4 = gprMax.Triangle(p1=(x + 0.01 + 0.005 + 0.187,
y + casethickness + 0.005 + 0.203, z + skidthickness),
p2=(x + 0.01 + 0.005 + 0.187 + bowtiebase,
y + casethickness + 0.005 + 0.203, z + skidthickness),
p3=(x + 0.01 + 0.005 + 0.187 + (bowtiebase/2),
y + casethickness + 0.005 + 0.203 - bowtieheight,
z + skidthickness), thickness=0, material_id='pec')
# Edges that represent wire between bowtie halves in 2mm model
e1 = gprMax.Edge(p1=(tx[0] + 0.162, tx[1] - dy, tx[2]),
p2=(tx[0] + 0.162, tx[1], tx[2]), material_id='pec')
e2 = gprMax.Edge(p1=(tx[0] + 0.162, tx[1] + dy, tx[2]),
p2=(tx[0] + 0.162, tx[1] + 2*dy, tx[2]), material_id='pec')
e3 = gprMax.Edge(p1=(tx[0], tx[1] - dy, tx[2]),
p2=(tx[0], tx[1], tx[2]), material_id='pec')
e4 = gprMax.Edge(p1=(tx[0], tx[1] + dy, tx[2]),
p2=(tx[0], tx[1] + 2*dy, tx[2]), material_id='pec')
scene_objects.extend((p1, p2, t1, t2, p3, p4, t3, t4, e1, e2, e3, e4))
# Metallic plate extension
b15 = gprMax.Box(p1=(x + (casesize[0] / 2), y + casethickness, z + skidthickness),
p2=(x + (casesize[0] / 2) + shieldthickness,
y + casesize[1] - casethickness, z + skidthickness + metalmiddleplateheight),
material_id='pec')
# Skid
if smooth_dec == 'yes':
b16 = gprMax.Box(p1=(x, y, z),
p2=(x + casesize[0], y + casesize[1], z + skidthickness - 0.002),
material_id='hdpe')
elif smooth_dec == 'no':
b16 = gprMax.Box(p1=(x, y, z),
p2=(x + casesize[0], y + casesize[1], z + skidthickness - 0.002),
material_id='hdpe', averaging='n')
scene_objects.extend((b15, b16))
# Source
# Excitation - Gaussian pulse
w1 = gprMax.Waveform(wave_type='gaussian', amp=1, freq=excitationfreq, id='my_gaussian')
scene_objects.append(w1)
if src_type == 'voltage_source':
vs1 = gprMax.VoltageSource(polarisation='y', p1=(tx[0], tx[1], tx[2]),
resistance=sourceresistance, waveform_id='my_gaussian')
scene_objects.append(vs1)
elif src_type == 'transmission_line':
tl1 = gprMax.TransmissionLine(polarisation='y', p1=(tx[0], tx[1], tx[2]),
resistance=sourceresistance, waveform_id='my_gaussian')
scene_objects.append(tl1)
# Receiver
# Zero waveform to use with transmission line at receiver output
w2 = gprMax.Waveform(wave_type='gaussian', amp=0, freq=excitationfreq, id='my_zero_wave')
scene_objects.append(w2)
if resolution == 0.001 or resolution == 0.0005:
if src_type == 'transmission_line':
tl2 = gprMax.TransmissionLine(polarisation='y', p1=(tx[0] + 0.16, tx[1], tx[2]),
resistance=receiverresistance, waveform_id='my_zero_wave')
scene_objects.append(tl2)
elif src_type == 'voltage_source':
r1 = gprMax.Rx(p1=(tx[0] + 0.16, tx[1], tx[2]), id='rxbowtie', outputs='Ey')
scene_objects.append(r1)
elif resolution == 0.002:
if src_type == 'transmission_line':
tl2 = gprMax.TransmissionLine(polarisation='y', p1=(tx[0] + 0.162, tx[1], tx[2]),
resistance=receiverresistance, waveform_id='my_zero_wave')
scene_objects.append(tl2)
elif src_type == 'voltage_source':
r1 = gprMax.Rx(p1=(tx[0] + 0.162, tx[1], tx[2]), id='rxbowtie', outputs='Ey')
scene_objects.append(r1)
# Geometry views
gv1 = gprMax.GeometryView(p1=(x - dx, y - dy, z - dz), p2=(x + casesize[0] + dx,
y + casesize[1] + dy, z + skidthickness + casesize[2] + dz),
dl=(dx, dy, dz), filename='antenna_like_GSSI_400',
output_type='n')
gv2 = gprMax.GeometryView(p1=(x, y, z), p2=(x + casesize[0], y + casesize[1], z + 0.010),
dl=(dx, dy, dz), filename='antenna_like_GSSI_400_pcb',
output_type='f')
# scene_objects.extend((gv1, gv2))
return scene_objects
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