A medium line with parameters A, B, C, D is extended by

A medium line with parameters A, B, C, D is extended by connecting a short line of impedance Z in series. The over all ABCD par ameters of the series combination will be

1. A, AZ, C + D/Z, D
2. A, AZ + B, C, CZ + D
3. A + BZ, B, C + DZ, D
4. AZ, B, C/Z, D

	A		B		=		A₁		B₁
	C		D		=		C₁		D₁

For a short line, A = 1, B = Z, C = 0, D = 1
∴ Resultant parameters are given by

	A_T		B_T		=		A		B
	C_T		D_T		=		C		D

	1		Z		=		A		AZ + B
	0		1		=		C		CZ + D