Performance Analysis of Low noise amplifier using Combline Bandpass Filter for X Band Applications

Lahsaini Mohammed (Materials and Instrumentation Group, LASMAR, Faculty of Science, Moulay Ismail University)
Toulali Islam (Equipe de Recherche en Smart Communications (ERSC), E3S Research Center, Mohammadia School of Engineers (EMI), Mohammed Vth University, Rabat, Morocco)
Zenkouar Lahbib (3Equipe de Recherche en Smart Communications (ERSC), E3S Research Center, Mohammadia School of Engineers (EMI), Mohammed Vth University, Rabat)

Indonesian Journal of Electrical Engineering and Informatics (IJEEI)
Vol 7, No 3: September 2019

This paper describes a procedure for designing broadband low noise amplifier for X-Band applications. The design and implementation is based on HEMT transistors AFP02N2-00 of Alpha Industries®. The matching circuit used for modeling the microwave amplifier is the quarter-wave transformers impedance matching technique associated to combline bandpass filter.  The proposed amplifier is implemented on a substrate of epoxy FR4 with a central frequency of 11GHz and a fractional bandwidth of 0.18% and is designed to be used in radar reception systems. The results show that the proposed LNA is unconditionally stable with a simulated gain of 20dB over the working frequency range of [9.5−12.5] GHz.