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

Description

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

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.

Impedances in one region of the Smith chart cannot be generated with these networks, but the next schematic will generate impedances in this forbidden region, which is shown on the schematic.

Main Schematic Settings

Desired impedance, load resistance, frequency of match, Q of impedance transformation network

Data Display Outputs

• L and C component values of the network
• Generated impedance versus frequency, on a Smith chart
• Reflection coefficient versus frequency (dB) looking back into the network from the output resistor, RL, when the other end of the network is terminated in the complex conjugate of the desired impedance

Schematic Name

Zdesired1M

Data Display Name

Zdesired1M.dds