Wireless Power Wiki

An impedance inverter changes an output impedance $Z_{out}$ to its inversely proportional value $Z_{in}$, multiplied by a value K²:

$$Z_{in}=\frac{K^2}{Z_{out}}$$

K is a reactance (in ohm), and is called the characteristic impedance of the inverter.

Different options exist to realize an admittance inverter, for example:

For example, when we choose an inductor, K equals $\omega L$ and we get the following circuit. (Note: a negative inductor corresponds to an capacitance, i.e., a capacitor instead of a coil).

Note that this is exactly the magnetic coupling for inductive wireless power transfer, where L is the mutual inductance!

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