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Fix impedance renormalization + add unit tests

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Jan Käberich 2025-02-09 12:59:11 +01:00
parent 523946447a
commit 50bde261af
9 changed files with 114 additions and 2 deletions
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42
Software/PC_Application/LibreVNA-Test/impedancerenormalizationtests.cpp Normal file
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#include "impedancerenormalizationtests.h"
ImpedanceRenormalizationTests::ImpedanceRenormalizationTests()
{
renorm = new ImpedanceRenormalization();
// set it up to normalize to 75 Ohm
nlohmann::json j;
j["impedance"] = 75;
renorm->fromJSON(j);
}
ImpedanceRenormalizationTests::~ImpedanceRenormalizationTests()
{
delete renorm;
}
void ImpedanceRenormalizationTests::OnePortTests()
{
// Create dummy measurements
DeviceDriver::VNAMeasurement measShort;
measShort.pointNum = 0;
measShort.Z0 = 50.0;
measShort.measurements["S11"] = -1.0;
auto measLoad = measShort;
measLoad.measurements["S11"] = 0.0;
auto measOpen = measShort;
measOpen.measurements["S11"] = 1.0;
// perform renormalization
renorm->transformDatapoint(measShort);
renorm->transformDatapoint(measLoad);
renorm->transformDatapoint(measOpen);
QVERIFY(measShort.measurements["S11"] == -1.0);
// a Ohm load renormalized to 75 Ohm impedance has a reflection coefficient of -0.2
QVERIFY(measLoad.measurements["S11"] == -0.2);
QVERIFY(measOpen.measurements["S11"] == 1.0);
}