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fix: unexpected ripple of s21 in thru

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TT 2019-09-27 08:31:19 +09:00
parent 47f48d83e4
commit 0b885f2640
1 changed files with 3 additions and 7 deletions
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10
main.c
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@ -1063,13 +1063,9 @@ eterm_calc_et(void)
{ {
int i; int i;
for (i = 0; i < sweep_points; i++) { for (i = 0; i < sweep_points; i++) {
// Et = 1/(S21mt - Ex)(1 - Es) // Et = 1/(S21mt - Ex)
float esr = 1 - cal_data[ETERM_ES][i][0]; float etr = cal_data[CAL_THRU][i][0] - cal_data[CAL_ISOLN][i][0];
float esi = -cal_data[ETERM_ES][i][1]; float eti = cal_data[CAL_THRU][i][1] - cal_data[CAL_ISOLN][i][1];
float s21mr = cal_data[CAL_THRU][i][0] - cal_data[CAL_ISOLN][i][0];
float s21mi = cal_data[CAL_THRU][i][1] - cal_data[CAL_ISOLN][i][1];
float etr = esr * s21mr - esi * s21mi;
float eti = esr * s21mi + esi * s21mr;
float sq = etr*etr + eti*eti; float sq = etr*etr + eti*eti;
float invr = etr / sq; float invr = etr / sq;
float invi = -eti / sq; float invi = -eti / sq;