Impedance Transformer Design

The role of impedance transformer is crucial in RF microwave input/output impedance matching and antenna feed network design. Impedance transformer are primarily used as bridging network between two  component with different input impedances. Quarter-wave impedance transformer or λ/4 impedance transformer is very popular  in electrical engineering .

The relationship between the characteristic impedance, Zo,  Zin and load impedance, ZL is:  Z0=sqrt(Zin*ZL).

Below is one simulated design in ADS (Advanced design system) that transfer 100 ohm impedance to 50 ohm impedance .

design

Simulated S-Parameter data

result

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