A two port network has Z-parametersZ11Z12 the load ZL for

A two port network has Z-parameters Z₁₁ Z₁₂ the load Z_L for maximum transfer power to it is given by—
Z₂₁ Z₂₂

1. Z_L = Z₂₂ Z₁₁ – Z₁₂ Z₂₁
  Z₁₁
2. Z_L = Z₁₁
3. Z_L = Z₁₂
4. Z_L = Z₁₁ + Z₁₂ + Z₂₁ + Z₂₂

We know that for maximum transfer of power
Z_th = Z_L
On considering the Z-parameter equation
V₁ = Z₁₁ I₁ + Z₁₂ I₂
V₂ = Z₂₁ I₁ + Z₂₂ I₂

R_th = Z_l =	V₂
	I₂

can be obtained by shorting the input terminal i.e. V₁ = 0
on putting V₁ = 0, calculate V₂/ I₂

Z_l =	V₂	=	Z₂₂ Z₁₁ – Z₂₁ Z₁₂
	I₂		Z₁₁

A two port network has Z-parameters			Z₁₁	Z₁₂		the load Z_L for maximum transfer power to it is given by—
			Z₂₁	Z₂₂