International Journal of Engineering and Technology

This project presents a low noise and high gain cascoded LNA amplifier for direct conversion RF front end receiver architecture, which operates at 5.8 GHz unlicensed band. The LNA used Transistor FHX76LP superHEMT low noise FET. This LNA was designed and used inductive feedback and T- matching network consisting of lump reactive at the input and output of the LNA circuit. A single cascoded LNA design was built to meet the standard of IEEE 802.16. The cascoded LNA produced low noise figure of 0.83 dB with high gain of 26.26 dB. The S-parameter for the input reflection S11, output reflection S22, and return loss S12 are of -11.05 dB, -10.5 dB and -30.92 dB respectively. The bandwidth measured is 1.56 GHz, while the input sensitivity is -82.6 dBm which is compliant WiMAX standards. The single stage LNA amplifier simulated using Ansoft Designer SV.