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rectangular_patch.py
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rectangular_patch.py
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#! /usr/bin/python3
import math
from cmath import e
from pint import UnitRegistry
ureg = UnitRegistry()
from print_generator import PrintGenerator
from dxf_generator import DXFGenerator
from gerber_generator import GerberGenerator
class RectangularPatch():
def __init__(self, args):
self.printGen = PrintGenerator(args)
self.dxfGen = DXFGenerator(args)
self.gerberGen = GerberGenerator(args)
self.args = args
def patch_width(self, f, er):
return (3e8 / (2 * f)) * math.sqrt(2/(er+1))
def effective_relative_permittivity(self, f, er, h, W):
return ((er+1)/2) + (((er-1)/2)*(1+(12*(h/W)))**-0.5)
def delta_length(self, h, ereff, W):
return h * 0.412 * ((ereff+0.3)*((W/h)+0.264))/((ereff-0.258)*((W/h)+0.8))
def effective_length(self, f, ereff):
return 3e8 / (2 * f * math.sqrt(ereff))
def A_calculation(self, Z0, er):
return Z0/60 * math.sqrt((er+1)/2) + ((er-1)/(er+1)) * (0.23+0.11/er)
def A_check(self, Z0, er):
A = self.A_calculation(Z0, er)
if self.args.verbose:
print("[*] A =", A)
wsd = (8 * e**(A))/(e**(2*A) - 2)
if self.args.verbose:
print("[*] A Ws/d =", wsd)
if wsd < 2:
if self.args.verbose:
print("[*] A is valid")
return wsd
else:
if self.args.verbose:
print("[*] A is not valid")
return -1
def B_calculation(self, Z0, er):
return (377*math.pi)/(2*Z0*math.sqrt(er))
def B_check(self, Z0, er):
B = self.B_calculation(Z0, er)
if self.args.verbose:
print("[*] B =", B)
wsd = (2/math.pi)*(B - 1 - math.ln(2*B-1) + (er-1)/(2*er) * (math.ln(B-1) + 0.39 - 0.61/(er)))
if self.args.verbose:
print("[*] B Ws/d =", wsd)
if wsd > 2:
if self.args.verbose:
print("[*] B is valid")
return wsd
else:
if self.args.verbose:
print("[*] B is not valid")
return -1
def ws_calculation(self, h, Z0, er):
if self.A_check != -1:
return self.A_check(Z0, er) * h
elif self.B_check != -1:
return self.B_check(Z0, er) * h
else:
if self.args.verbose:
print("No valid Stripline width found")
def y0_calculation(self, W):
if self.args.verbose:
print("[*] y0 =", W/2)
return W/2
def x0_calculation(self, L, W, er, Z0):
Zin_0 = (90 * (er**2))/(er-1) * (L/W)
if self.args.verbose:
print("[*] Zin_0 =", Zin_0)
Zin_x0 = Z0
if self.args.verbose:
print("[*] Zin_x0 =", Zin_x0)
x0 = math.acos(math.sqrt(Zin_x0/Zin_0)) * (L/math.pi)
if self.args.verbose:
print("[*] x0 =", x0)
return x0
def unit_print(self, name, value, unit=None):
if unit != None:
print("[*]", name, "= {:.2f}".format((value*ureg.meter).to(self.args.unit)))
else:
print("[*]", name, "= {:.2f}".format((value*ureg.meter).to_compact()))
def export_png(self, filename, W, L, x0, y0, ws):
if self.args.pngoutput:
filename = self.args.pngoutput
if self.args.type == "microstrip":
self.printGen.print_patch(filename, round((W * ureg.meter).to(ureg.centimeter), 3).magnitude, round((L * ureg.meter).to(ureg.centimeter), 3).magnitude,
round((x0 * ureg.meter).to(ureg.centimeter), 3).magnitude, round((y0 * ureg.meter).to(ureg.centimeter), 3).magnitude,
round((ws * ureg.meter).to(ureg.centimeter), 3).magnitude)
elif self.args.type == "probe":
self.printGen.print_patch(filename, round((W * ureg.meter).to(ureg.centimeter), 3).magnitude, round((L * ureg.meter).to(ureg.centimeter), 3).magnitude,
round((x0 * ureg.meter).to(ureg.centimeter), 3).magnitude, round((y0 * ureg.meter).to(ureg.centimeter), 3).magnitude)
def export_dxf(self, filename, W, L, x0, y0, ws, separate_layers=None):
if self.args.gerberoutput:
filename = self.args.gerberoutput
elif self.args.dxfoutput:
filename = self.args.dxfoutput
if self.args.type == "microstrip":
if self.args.dxfunit:
self.dxfGen.generate_patch_dxf(filename, round((W * ureg.meter).to(self.args.dxfunit), 5).magnitude, round((L * ureg.meter).to(self.args.dxfunit), 5).magnitude,
round((x0 * ureg.meter).to(self.args.dxfunit), 5).magnitude, round((y0 * ureg.meter).to(self.args.dxfunit), 5).magnitude,
round((ws * ureg.meter).to(self.args.dxfunit), 5).magnitude, separate_layers)
else:
self.dxfGen.generate_patch_dxf(filename, round((W * ureg.meter), 5).magnitude, round((L * ureg.meter), 5).magnitude,
round((x0 * ureg.meter), 5).magnitude, round((y0 * ureg.meter), 5).magnitude,
round((ws * ureg.meter), 5).magnitude, separate_layers)
elif self.args.type == "probe":
if self.args.dxfunit:
self.dxfGen.generate_patch_dxf(filename, round((W * ureg.meter).to(self.args.dxfunit), 5).magnitude, round((L * ureg.meter).to(self.args.dxfunit), 5).magnitude,
round((x0 * ureg.meter).to(self.args.dxfunit), 5).magnitude, round((y0 * ureg.meter).to(self.args.dxfunit), 5).magnitude, None, separate_layers)
else:
self.dxfGen.generate_patch_dxf(filename, round((W * ureg.meter), 5).magnitude, round((L * ureg.meter), 5).magnitude,
round((x0 * ureg.meter), 5).magnitude, round((y0 * ureg.meter), 5).magnitude, None, separate_layers)
def export_patch_to_png(self):
if self.args.type == 'microstrip':
self.export_png(self.args.pngoutput, self.args.width, self.args.length, self.args.x0, self.args.y0, self.args.strip_width if self.args.type == "microstrip" else None)
elif self.args.type == 'probe':
self.export_png(self.args.pngoutput, self.args.width, self.args.length, self.args.x0, self.args.y0, self.args.strip_width if self.args.type == "microstrip" else None)
def export_patch_to_dxf(self):
if self.args.type == 'microstrip':
self.export_dxf(self.args.dxfoutput, self.args.width, self.args.length, self.args.x0, self.args.y0, self.args.strip_width if self.args.type == "microstrip" else None)
elif self.args.type == 'probe':
self.export_dxf(self.args.dxfoutput, self.args.width, self.args.length, self.args.x0, self.args.y0, self.args.strip_width if self.args.type == "microstrip" else None)
def export_patch_to_gerber(self):
if self.args.type == 'microstrip':
self.export_dxf(self.args.gerberoutput, self.args.width, self.args.length, self.args.x0, self.args.y0, self.args.strip_width if self.args.type == "microstrip" else None, True)
self.gerberGen.generate_gerber(self.args.gerberoutput)
elif self.args.type == 'probe':
self.export_dxf(self.args.gerberoutput, self.args.width, self.args.length, self.args.x0, self.args.y0, self.args.strip_width if self.args.type == "microstrip" else None, True)
self.gerberGen.generate_gerber(self.args.gerberoutput)
def microstrip_patch_calculator(self, Z0=50):
Z0 = Z0 #50 ohms by default
W = self.patch_width(self.args.frequency, self.args.relative_permittivity)
if not (self.args.variable_return):
self.unit_print("W", W, self.args.unit)
ereff = self.effective_relative_permittivity(self.args.frequency, self.args.relative_permittivity, self.args.height, W)
if self.args.verbose:
print("[*] Ereff = {:.2f}".format(ereff))
dL = self.delta_length(self.args.height, ereff, W)
if self.args.verbose:
self.unit_print("dL", dL, self.args.unit)
Leff = self.effective_length(self.args.frequency, ereff)
if self.args.verbose:
self.unit_print("Leff", Leff, self.args.unit)
L = Leff - 2*dL
if not (self.args.variable_return):
self.unit_print("L", L, self.args.unit)
x0 = self.x0_calculation(L, W, self.args.relative_permittivity, Z0)
if not (self.args.variable_return):
self.unit_print("x0", x0, self.args.unit)
y0 = self.y0_calculation(W)
if not (self.args.variable_return):
self.unit_print("y0", y0, self.args.unit)
if self.args.type == "microstrip":
ws = self.ws_calculation(self.args.height, Z0, self.args.relative_permittivity)
if not (self.args.variable_return):
self.unit_print("Ws", ws, self.args.unit)
if self.args.pngoutput:
self.export_png(self.args.pngoutput, W, L, x0, y0, ws if self.args.type == "microstrip" else None)
if self.args.dxfoutput:
self.export_dxf(self.args.dxfoutput, W, L, x0, y0, ws if self.args.type == "microstrip" else None)
if self.args.gerberoutput:
self.export_dxf(self.args.gerberoutput, W, L, x0, y0, ws if self.args.type == "microstrip" else None, True)
self.gerberGen.generate_gerber(self.args.gerberoutput)
if self.args.variable_return:
if self.args.type == "microstrip":
return W, L, x0, y0, ws
elif self.args.type == "probe":
return W, L, x0, y0