II-2HOII-2. Network Parameters (1) Network Parameters h-parameters v h 1 = 11 i h 2 21 h i1 12 h v2 22 (4) z-parameters v1 = z11i1 + z12i2 v2 = z21i1 + z22i2 or in matrix form v z 1 = 11 v z 2 21 ABCD-parameters (1) v1 A = i C 1 B v2 i D 2 (5) z12 i 1 i z22 2 Microwave limitation (2) (1) impossible short/open circuit for broadband microwave frequency (2) Active 2-port might oscillate under short/open circuit at MW frequency y-parameters i y 1 = 11 i y 2 21 y12 v1 y22 v2 (3) -> Scattering Parameters ICE651 MMIC Design II-2-1 II-2. Network Parameters (2) Impedance and Admittance Network Parameters Z 11 = Z 12 = Z 21 = v1 i1 v1 i2 v2 i1 i2 = 0 = Z A (Z B + Z C ) = = ZA [ Z C ( Z A + Z B )] ZA + ……