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Stub matching can compensate only immaginary parts of an impedance...so to match the real part you use a lambda/4 transformer and if you need to match even the immaginary part you can use a stub...
a l-long stub has impedance equal to: Z(l) = Zo*[Zc+j Zo tan (bl)]/[Zo+j Zc tan (bl)] where Zc is the impedance of the termination (a open or a short) and Zo is the characteristic impedance of the line...
So a stub based on an open circuit has impedance: Z(l) = -j* Zo cotg (bl).
Alternatively a stub with a short has impedance Z(l) = j Zo tan (bl)
As you can see it is EXCLUSIVELY immaginary , i.e. , it is a pure admittance.
Chosing properly l one can tune the immaginary part to the needed value.
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