1. Solid State Amplifier At microwave frequencies, the scattering parameters are used In the design of microwave amplifiers. Design Goals: 1.Maximum power gain 2.Minimum noise figure. 3.Stable gain (no oscillation) 4.Input and output VSWR as close to unity as possible 5.Adequate gain and uniformity of gain over a specified frequency band 6.Phase response that is a linear function of frequency 7.Insensitivity to nominal variations in the scattering parameters.

2. Amplifier Power Gain MN1 Amplifier 1 Gp1 MN2 Amplifier 2 Gp2 MN3 50 Ohms A two-stage amplifier with matching networks MM MsMs MLML MLML MsMs V+V+ Z in ZsZs Z

4. For lossless matching networks the impedance mismatch is the same on the input side as on the output side

6. Derivation of Expression of Gain S ij M ij MsMs Z in V1V1 V1V1 Z out + - V2V2 V2V2 + - ZLZL ZsZs  in ss LL  out A basic amplifier circuit