Читать книгу Handbook of Microwave Component Measurements - Joel P. Dunsmore - Страница 136

Just as the T‐parameters provide for easy concatenation of devices using a and b waves, a similar matrix representation can be used when the terminal characteristics are defined in terms of voltage and current. These are sometimes called transfer parameters (reminiscent of the T‐parameters) or chain parameters as networks can be chained together in a matrix multiplication manner.

The functional definition of ABCD parameters is found in at least two different forms, one of which is

(2.38)

The second form replaces the minus sign with a plus sign with resulting changes in the derived values.

From Eq. 2.38 the values for ABCD parameters can be defined as

(2.39)

The transformations between the ABCD‐matrix and the S‐matrix are

(2.40)

(2.41)

where