5.4 GHz Integrated Linear Small-Signal Amplifier

Overview

Designed and simulated a 5.4 GHz GaAs HEMT small-signal amplifier with 50 Ω matching, high gain, low noise, and ensured stability.

RF amplifier designed in Keysight ADS using a 2×100 µm GaAs HEMT. Includes input/output matching, biasing, and stabilization, targeting WiFi-band operation with narrowband tuning and low power consumption.

What I learned

• • S-parameter based input and output matching at 5.4 GHz
• • Narrowband RF tuning and bandwidth–Q trade-offs
• • GaAs HEMT biasing for low power and linear operation
• • Noise figure optimization via source matching
• • RF stability analysis under mismatched conditions