![]() This means you will probably need to get “high-frequency” or “RF” inductors, assuming the frequency of operating will be between 100MHz-6GHz. GPS antennas and WiFi antennas on PCBs) are matched with capacitors between 1-10pF and inductors between 1-10nH. ![]() This is normally the point at the centre of the chart. In many case, it is desired so that the impedance is matched to \( (50 + j0)\Omega \) (the impedance is purely real). They normally perform a frequency sweep and plot a line on the graph rather than a single point. Smith charts can be generated by most network analysers. Impedance Smith charts are good for matching the impedance with series components, while admittance Smith charts are good for matching the impedance with parallel (shunt) components. Smith charts show information such as the real and imaginary parts of both impedance and admittance and the reflection co-efficient (S11). ![]() Smith charts are used to display RF-relevant information about a particular circuit, device, or antenna trace.
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