High Gain Cascaded Low Noise Amplifier using T-Matching Network

• Main Authors: Othman , A. R, Hamidon , A. H, Abdul Wasli. , C, Ting , J. T. H, Mustaffa , M. F, Ibrahim , A.B
• Format: Article
• Language: English
• Published: JTEC 2010
• Subjects: Q Science (General)
• Online Access: http://eprints.utem.edu.my/id/eprint/6795/1/JTEC2010-1.pdf; http://eprints.utem.edu.my/id/eprint/6795/; http://jtec.utem.edu.my

This project presents a design of high gain cascaded low noise amplifier (LNA), which operates at 5.8 GHz frequency for WiMAX application. The LNA designed used T-matching network consisting of lump reactive elements and microstrip at the input and the output matching load uses quarter wavelength techniques. A cascaded LNA is developed in this project contribute a high gain of 36.8 dB with overall noise figure of 1.3 dB. The overall measured bandwidth measures is 1.240 GHz with S parameters S11, S12 and S22 measured are -11.4dB, -39.1dB and -12.3dB respectively. The input sensitivity of the LNA is -80dBm which compliant with the IEEE 802.16 WiMAX application. The LNA used FET transistor FHX 76 LP from Eudina Inc.