Lumped 2-Element Z-Y Matching Networks > Rload, Series C/L, Shunt C/L for Desired Z

Description

This schematic synthesizes two different networks that convert a load resistance to an arbitrary impedance at a single frequency. Starting from a resistance, RL, the network generates an impedance via series L - shunt C and series C - shunt L ladder networks.

Note For certain desired impedances, some of the calculated component values will be negative. These negative components must be replaced with positive ones. For example, negative inductors must be replaced by positive capacitors and negative capacitors must be replaced by positive inductors. The correct component values when such replacements are necessary are calculated on the data display,

Only impedances in one region (hashed in the figure shown here) of the Smith chart can be generated with these networks, but the previous schematic will generate impedances outside this region.

Main Schematic Settings

Desired impedance, load resistance, frequency of match

Data Display Outputs

• L and C component values of the two networks
• Generated impedances versus frequency, on a Smith chart
• Reflection coefficient (dB) presented to the external load resistor, versus frequency, for both networks. This is a perfect match at the matching frequency, but not at other frequencies.

Schematic Name

Zdesired2

Data Display Name

Zdesired2.dds