def test_input_reflection_coefficient(self):
"""
Test the input reflection coefficient value of the line.
"""
Gamma_in = rf.zl_2_Gamma0(self.z0, self.zin)
expected_Gamma_in = (self.zin - self.z0) / (self.zin + self.z0)
assert_equal(Gamma_in, expected_Gamma_in)
def test_shunt_admittance(self):
Ys = [1, 1 + 1j, rf.INF]
for Y in Ys:
assert_array_almost_equal(
rf.Circuit.ShuntAdmittance(self.freq, Y, 'imp').s,
self.media.shunt(
self.media.load(rf.zl_2_Gamma0(self.media.z0, 1 / Y))).s)
# Y=INF is a a 2-ports short, aka a ground
assert_array_almost_equal(
rf.Circuit.ShuntAdmittance(self.freq, rf.INF, 'imp').s,
rf.Circuit.Ground(self.freq, 'ground').s)
def test_propagation_constant_from_reflection_coefficient(self):
"""
Test the propagation constant value deduced from reflection coef
"""
Gamma_in = rf.zl_2_Gamma0(self.z0, self.zin)
Gamma_l = -1 # short
gamma = rf.reflection_coefficient_2_propagation_constant(
Gamma_in, Gamma_l, self.d)
expected_gamma = 0.02971 + 1.272j
assert_almost_equal(real(gamma), real(expected_gamma), decimal=4)
assert_almost_equal(imag(gamma), imag(expected_gamma), decimal=4)