Is your equation with the division correct? There is something like dissipation loss, but that is 1-( |S11|^2 + |S21|^2 ). It is the loss in the DUT, calculated from comparing incident power minus reflected power minus transmitted power.
yes you are right......its
1-( |S11|^2 + |S21|^2 )
and graph is for this equation only.....
And if I'm not wrong .....from graph it can be concluded that loss is minimum for 3-4GHz....
what other outcomes??