from the Smith Chart I may get the value of R (it is 471 Ohm, as told before).from the Smith Chart I may get the value of L: I should take the Imaginary Part of Zin at low frequencies (in which the device is almost purely inductive) and divide by 2*pi*f.Now my question is: which is the equivalent RLC circuit of this device according to this analysis? So, at f0 the devices resonates and offers a purely real impedance. You may see these results also in the following graphs (the first one contains real and imaginary parts of the impedance, while the second one its absolute value). It is equal to about 471 Ohm (absolute value). It seems it arrives at the open point but it is not: if you see the following graph you see that the impedance is, obviously, purely real, but not infinite. Then, the device offers an inductive impedance, until, at about f0 = 470 MHz, we arrive at the real axis (right). I have measured its impedance at different frequencies (from 10 MHz to 600 MHz) and I have seen it on the normalized (on 50 Ohm) Impedance Smith Chart:Īt Low frequencies we are at the short circuit point (left). I have done some impedance measurements on an unknown 1 port device.
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