class NISTMultilineTRLTest2(unittest.TestCase):
""" Test characteristic impedance change and reference plane shift.
Due to the transformations solved error boxes are not equal to the initial
error boxes so CalibrationTestCase can't be used."""
def setUp(self):
global NPTS
self.n_ports = 2
self.wg = WG
wg = self.wg
r = npy.random.uniform(10,100,NPTS)
l = 1e-9*npy.random.uniform(100,200,NPTS)
g = npy.zeros(NPTS)
c = 1e-12*npy.random.uniform(100,200,NPTS)
rlgc = rf.media.DistributedCircuit(frequency=wg.frequency, z0=None, R=r, L=l, G=g, C=c)
self.rlgc = rlgc
self.X = wg.random(n_ports =2, name = 'X')
self.Y = wg.random(n_ports =2, name = 'Y')
self.gamma_f = wg.random(n_ports =1, name='gamma_f')
self.gamma_r = wg.random(n_ports =1, name='gamma_r')
actuals = [
rlgc.thru(),
rlgc.short(nports=2),
rlgc.line(10,'um'),
rlgc.line(100,'um'),
rlgc.line(500,'um'),
]
self.actuals=actuals
measured = [self.measure(k) for k in actuals]
self.measured = measured
self.cal = NISTMultilineTRL(
measured = measured,
Grefls = [-1],
l = [0, 10e-6, 100e-6, 500e-6],
switch_terms = (self.gamma_f, self.gamma_r),
ref_plane=50e-6,
c0=c,
z0_ref=50,
gamma_root_choice = 'real'
)
def terminate(self, ntwk):
'''
terminate a measured network with the switch terms
'''
return terminate(ntwk,self.gamma_f, self.gamma_r)
def measure(self,ntwk):
out = self.terminate(self.X**ntwk**self.Y)
out.name = ntwk.name
return out
def test_gamma(self):
self.assertTrue(max(npy.abs(self.rlgc.gamma-self.cal.gamma)) < 1e-3)
def test_z0(self):
self.assertTrue(max(npy.abs(self.rlgc.z0-self.cal.z0)) < 1e-3)
def test_shift(self):
self.assertTrue(self.cal.apply_cal(self.measured[3]) == self.wg.thru())
def test_shift2(self):
feed = self.rlgc.line(50,'um')
dut = self.wg.random(n_ports=2)
#Thrus convert the port impedances to 50 ohm
dut_feed = self.wg.thru()**feed**dut**feed**self.wg.thru()
dut_meas = self.measure(dut_feed)
self.assertTrue(self.cal.apply_cal(dut_meas) == dut)
class NISTMultilineTRLTest2(unittest.TestCase):
""" Test characteristic impedance change and reference plane shift.
Due to the transformations solved error boxes are not equal to the initial
error boxes so CalibrationTestCase can't be used."""
def setUp(self):
global NPTS
self.n_ports = 2
self.wg = WG
wg = self.wg
r = npy.random.uniform(10, 100, NPTS)
l = 1e-9 * npy.random.uniform(100, 200, NPTS)
g = npy.zeros(NPTS)
c = 1e-12 * npy.random.uniform(100, 200, NPTS)
rlgc = rf.media.DistributedCircuit(frequency=wg.frequency,
z0=None,
R=r,
L=l,
G=g,
C=c)
self.rlgc = rlgc
self.X = wg.random(n_ports=2, name='X')
self.Y = wg.random(n_ports=2, name='Y')
self.gamma_f = wg.random(n_ports=1, name='gamma_f')
self.gamma_r = wg.random(n_ports=1, name='gamma_r')
actuals = [
rlgc.thru(),
rlgc.short(nports=2),
rlgc.line(10, 'um'),
rlgc.line(100, 'um'),
rlgc.line(500, 'um'),
]
self.actuals = actuals
measured = [self.measure(k) for k in actuals]
self.measured = measured
self.cal = NISTMultilineTRL(measured=measured,
Grefls=[-1],
l=[0, 10e-6, 100e-6, 500e-6],
switch_terms=(self.gamma_f, self.gamma_r),
ref_plane=50e-6,
c0=c,
z0_ref=50,
gamma_root_choice='real')
def terminate(self, ntwk):
'''
terminate a measured network with the switch terms
'''
return terminate(ntwk, self.gamma_f, self.gamma_r)
def measure(self, ntwk):
out = self.terminate(self.X**ntwk**self.Y)
out.name = ntwk.name
return out
def test_gamma(self):
self.assertTrue(max(npy.abs(self.rlgc.gamma - self.cal.gamma)) < 1e-3)
def test_z0(self):
self.assertTrue(max(npy.abs(self.rlgc.z0 - self.cal.z0)) < 1e-3)
def test_shift(self):
self.assertTrue(self.cal.apply_cal(self.measured[3]) == self.wg.thru())
def test_shift2(self):
feed = self.rlgc.line(50, 'um')
dut = self.wg.random(n_ports=2)
#Thrus convert the port impedances to 50 ohm
dut_feed = self.wg.thru()**feed**dut**feed**self.wg.thru()
dut_meas = self.measure(dut_feed)
self.assertTrue(self.cal.apply_cal(dut_meas) == dut)
L2 = rf.Network(D_Line_2)
measured = [T, R, L2]
cal = NISTMultilineTRL(
measured = measured,
Grefls=[-1],
l = [0, 7.25e-3],
gamma_root_choice = 'auto',
)
#Ideal DUT characteristic for compare
DUT_IDEAL = rf.Network(D_DUT_Ideal)
dut_raw = rf.Network(D_DUT_Measure)
dut_corrected = cal.apply_cal(dut_raw)
plt.figure()
dut_raw.plot_s_smith(m=1 - 1, n=1 - 1, label ='Measure DUT', linewidth='3')
dut_corrected.plot_s_smith(m=1 - 1, n=1 - 1, label ='Calculated DUT', linewidth='3')
DUT_IDEAL.plot_s_smith(m=1 - 1, n=1 - 1, label ='Ideal DUT', linewidth='3', linestyle='--')
plt.ylabel('S11')
plt.grid()
plt.figure()
dut_raw.plot_s_db(m=1 - 1, n=1 - 1, label ='Measure DUT', linewidth='3')
dut_corrected.plot_s_db(m=1 - 1, n=1 - 1, label ='Calculated DUT', linewidth='3')
DUT_IDEAL.plot_s_db(m=1 - 1, n=1 - 1, label ='Ideal DUT', linewidth='3', linestyle='--')
plt.xlabel('F, Гц')