Lumped Multi-Element Z-Y Matching Networks > Rload, Series L, Shunt C, Series L/C to Match Series R-C or R-L Device
Description
Given a series R-C equivalent input or output circuit of a device, this schematic computes component values of a network in order to conjugately match the device to an output resistance. (The series R-C network can be converted to a series R-L network if the capacitance is set to a negative value, with formula given on the schematic.) Starting from a resistance, RL, the networks generate the complex conjugate impedance via a series L - shunt C - series L ladder network.
 | Note For certain desired impedances, 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. |
One limitation of this network is that it cannot perform the impedance transformation if Rdev*(1+Q**2)/RL <1 , where Rdev is the device's resistance, and RL is the external load resistance.
Main Schematic Settings
Device equivalent circuit (Series R-C or Series R-L) component values, load resistance, frequency of match, Q of impedance transformation network
Data Display Outputs
- L and C component values of the network
- Reflection coefficient versus frequency (dB and on a Smith chart) looking back into the network from the output resistor, RL, when the other end of the network is terminated in the device's equivalent circuit
Schematic Name
Data Display Name
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