def plot_three_load():
# dummy 2-port network from Frequency and s-parameters
freq = Frequency(1, 10, 1,
'ghz') # Frequency([start, stop, npoints, unit, …])
print(freq)
s = [0 + 1j, 0 - 1j, 0.23 - 0.43j] # random complex numbers
print(s)
# if not passed, will assume z0=50. name is optional but it's a good practice.
ntwk = Network(frequency=freq, z0=50, s=s, name='random values 1-port')
print(ntwk)
plt.figure()
ntwk.plot_s_smith(marker='o', linestyle='dotted')
plt.legend(loc=7)
plt.text(0,
0.85,
"0+1j",
fontsize=12,
bbox=dict(facecolor='red', alpha=0.5))
plt.text(0,
-0.85,
"0-1j",
fontsize=12,
bbox=dict(facecolor='red', alpha=0.5))
plt.text(0.28,
-0.43,
"0.23-0.43j",
fontsize=12,
bbox=dict(facecolor='red', alpha=0.5))
plt.title("S-Parameters")
data_log("plot some predefined loads in the smith char using skrf")
plt.show()
def plot_smith(freq, s11, s11_phase, location):
plt.figure()
f = Frequency(np.min(freq), np.max(freq), len(freq), 'mhz')
n = Network(freq=f,
s=10**(s11 / 20) * np.exp(1j * s11_phase * np.pi / 180),
z0=50)
n.plot_s_smith(draw_labels=True)
plt.savefig(location)
def plot_demo_rf():
ring_slot = Network('ring slot.s2p')
plt.figure()
ring_slot.plot_s_smith()
plt.figure()
ring_slot.plot_s_db()
plt.title("S-Parameters")
data_log("plot demo data")
plt.show()
import matplotlib.pyplot as plt
import skrf as rf
from skrf import Network
plt.rcParams["font.family"] = "Century Gothic"
plt.rcParams["font.size"] = "14"
SP = Network('SP/FR4_1UM.s2p')
plt.figure()
SP.plot_s_db(m=2-1, n=1-1, label='S21', linewidth ='3')
plt.xlabel('F, Гц')
plt.ylabel('S21, дБ')
plt.grid()
plt.figure()
SP.plot_s_db(m=1-1, n=1-1, label='S11', linewidth ='3')
plt.xlabel('F, Гц')
plt.ylabel('S11, дБ')
plt.grid()
plt.figure()
SP.plot_s_smith(0,0, label='S11', linewidth ='3',draw_labels=True)
plt.show()
print("start: " + start)
stop = argv[2]
print("stop: " + stop)
step = argv[3]
print("step: " + step)
try:
device = sark_open()
if not device:
print("device not connected")
else:
print("device connected")
prot, ver = sark_version(device)
print(prot, ver)
sark_buzzer(device, 1000, 800)
y = []
x = []
for freq in range(int(start), int(stop),
int(step)): # setup loop over number of points
rs, xs = sark_measure(device, freq)
x.append(freq)
y.append(z2gamma(rs[0], xs[0]))
ring_slot = Network(frequency=x, s=y, z0=50)
ring_slot.plot_s_smith()
print("done")
finally:
sark_close(device)
exit(1)
plt.figure()
plt.title(Title)
SP.plot_s_db(m=1 - 1, n=1 - 1, label=Legend_1, linewidth='3')
SP.plot_s_db(m=3 - 1, n=3 - 1, label=Legend_2, linewidth='3')
SP.plot_s_db(m=5 - 1, n=5 - 1, label=Legend_3, linewidth='3')
plt.xlabel('F, Гц')
plt.ylabel('S11, дБ')
plt.legend()
plt.grid()
plt.figure()
plt.title(Title)
SP.plot_s_smith(m=1 - 1,
n=1 - 1,
label=Legend_1,
linewidth='3',
draw_labels=True)
SP.plot_s_smith(m=3 - 1,
n=3 - 1,
label=Legend_2,
linewidth='3',
draw_labels=True)
SP.plot_s_smith(m=5 - 1,
n=5 - 1,
label=Legend_3,
linewidth='3',
draw_labels=True)
plt.figure()
plt.title(Title)
import matplotlib.pyplot as plt
import skrf as rf
from skrf import Network
plt.rcParams["font.family"] = "Century Gothic"
plt.rcParams["font.size"] = "14"
SP_ADS = Network('SP/Spiral/Spiral_std_ads.s2p')
SP_CAD = Network('SP/Spiral/Spiral_std_cadence.s2p')
plt.figure()
SP_CAD.plot_s_db(m=1 - 1, n=1 - 1, label='S11 Cadence', linewidth='3')
SP_ADS.plot_s_db(m=1 - 1, n=1 - 1, label='S11 ADS', linewidth='3')
plt.xlabel('F, Гц')
plt.ylabel('S11, дБ')
plt.grid()
plt.figure()
SP_CAD.plot_s_smith(0, 0, label='S11 Cadence', linewidth='3', draw_labels=True)
SP_ADS.plot_s_smith(0, 0, label='S11 ADS', linewidth='3', draw_labels=True)
plt.figure()
SP_CAD.plot_s_db(m=2 - 1, n=1 - 1, label='S21 Cadence', linewidth='3')
SP_ADS.plot_s_db(m=2 - 1, n=1 - 1, label='S21 ADS', linewidth='3')
plt.xlabel('F, Гц')
plt.ylabel('S21, дБ')
plt.grid()
plt.show()
plt.rcParams["font.size"] = "14"
SP_GL102 = Network('SP/Three_via_GL102.s6p')
SP_FR4 = Network('SP/Three_via_FR4.s6p')
plt.figure()
plt.title("GL102")
SP_GL102.plot_s_db(m=6-1, n=5-1, label='S65', linewidth ='3')
SP_GL102.plot_s_db(m=4-1, n=3-1, label='S43', linewidth ='3')
SP_GL102.plot_s_db(m=2-1, n=1-1, label='S21', linewidth ='3')
plt.xlabel('F, Гц')
plt.ylabel('S , дБ')
plt.grid()
plt.figure()
plt.title("GL102")
SP_GL102.plot_s_smith(5-1,5-1, label='S55', linewidth ='3',draw_labels=True)
SP_GL102.plot_s_smith(3-1,3-1, label='S33', linewidth ='3',draw_labels=True)
SP_GL102.plot_s_smith(1-1,1-1, label='S11', linewidth ='3',draw_labels=True)
plt.figure()
plt.title("FR4")
SP_FR4.plot_s_db(m=6-1, n=5-1, label='S65', linewidth ='3')
SP_FR4.plot_s_db(m=4-1, n=3-1, label='S43', linewidth ='3')
SP_FR4.plot_s_db(m=2-1, n=1-1, label='S21', linewidth ='3')
plt.xlabel('F, Гц')
plt.ylabel('S , дБ')
plt.grid()
plt.figure()
plt.title("FR4")
SP_FR4.plot_s_smith(5-1,5-1, label='S55', linewidth ='3',draw_labels=True)
SP_FR4.plot_s_smith(3-1,3-1, label='S33', linewidth ='3',draw_labels=True)
# -*- coding: utf-8 -*-
"""
Created on Fri Dec 7 14:55:26 2018
@author: justRandom
"""
import time
import numpy as np
from skrf import Network
import visa
a = []
for i in range(0, 4):
real = i / 10
imag = i / 100
a.append(complex(real, imag))
#SKRF smith chart plotting
myNet = Network(f=[0, 1, 2, 3], s=a, z0=[50])
myNet.plot_s_smith()
