- class skrf.calibration.deembedding.IEEEP370_SE_ZC_2xThru(dummy_2xthru, dummy_fix_dut_fix, name=None, z0=50, bandwidth_limit=0, pullback1=0, pullback2=0, side1=True, side2=True, NRP_enable=True, leadin=1, verbose=False, *args, **kwargs)¶
Creates error boxes from 2x-Thru and FIX-DUT-FIX networks.
Based on [I3E370].
A deembedding object is created with 2x-Thru (FIX-FIX) and FIX-DUT-FIX measurements, which are split into left (FIX-1) and right (FIX-2) fixtures with IEEEP370 Zc2xThru method.
Deembedding.deembed()is applied, the s-parameters of FIX-1 and FIX-2 are deembedded from FIX_DUT_FIX network.
This method is applicable only when there is 2xThru and FIX_DUT_FIX networks.
The possible difference of impedance between 2x-Thru and FIX-DUT-FIX is corrected.
>>> import skrf as rf >>> from skrf.calibration import IEEEP370_SE_ZC_2xThru
Create network objects for 2xThru and FIX-DUT-FIX
>>> s2xthru = rf.Network('2xthru.s2p') >>> fdf = rf.Network('f-dut-f.s2p')
Create de-embedding object
>>> dm = IEEEP370_SE_ZC_2xThru(dummy_2xthru = s2xthru, dummy_fix_dut_fix = fdf, bandwidth_limit = 10e9, pullback1 = 0, pullback2 = 0, leadin = 0, name = 'zc2xthru')
Apply deembedding to get the DUT
>>> dut = dm.deembed(fdf)
FIX-1 DUT FIX-2 +----+ +----+ +----+ -|1 2|---|1 2|---|2 1|- +----+ +----+ +----+
There is one difference compared to the original matlab implementation [I3E370]:
FIX-2 is flipped (see diagram above)
https://opensource.ieee.org/elec-char/ieee-370/-/blob/master/TG1/IEEEP370Zc2xThru.m commit 49ddd78cf68ad5a7c0aaa57a73415075b5178aa6
receiver filter in COM defined by eq 93A-20
IEEEP370_SE_ZC_2xThru De-embedding Initializer
enforces symmetric upon the first 10 points and interpolates the DC point.
Perform the de-embedding calculation