Radio Frequency Circuit Design, 2nd Edition

APPENDIX DTwo-Port Parameter Conversion

Conversion between the z, y, h, and g two-port voltage–current parameters is simply rearrangement of two linear equations relating voltages and currents at the two ports. Converting between these and the S parameters requires relating the voltage waves to voltages and currents. This latter relationship always includes the characteristic impedance, Z₀, by which the S parameters are referenced. Typically, this value is 50 . Table D.1 shows this conversion. The program PARCONV is basically a code of many of the conversions in Table D.1.

TABLE D.1 S-Parameter Conversion Chart

The definitions of the various two-port parameters are described below. In each case, it is assumed that the current is flowing into the port terminal:

(D.1)

(D.2)

(D.3)

(D.4)

(D.5)

(D.6)

For conversion to and from S parameters for circuits with more than two ports, ...