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

Description

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

Note For certain desired admittances, one of the calculated inductor values will be negative. This negative inductor must be replaced with a capacitor. The correct capacitor value when such a replacement is necessary is calculated on the data display.

Only admittances in one region (hashed in the figure shown here) of the Smith chart can be generated with this network.

Main Schematic Settings

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

Data Display Outputs

• L and C component values of the network
• Generated admittance 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 admittance

Schematic Name

Ydesired2M

Data Display Name

Ydesired2M.dds