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Design of a Low Noise Amplifier Using the Quarter Wave Transformers Matching Technique in the Frequency Band [9-13] GHz

Islam Toulali(1*), Mohammed Lahsaini(2), Lahbib Zenkouar(3)

(1) Electronic and Communication Laboratory, Mohammadia School of Engineers, EMI, Mohammed V University, Morocco
(2) Electronic and Communication Laboratory, Mohammadia School of Engineers, EMI, Mohammed V University, Morocco
(3) Electronic and Communication Laboratory, Mohammadia School of Engineers, EMI, Mohammed V University, Morocco
(*) Corresponding author



Low noise amplifier (LNA) constitutes one of the essential component in wireless communication systems. It is used especially for designing different types of communication receivers. The main function of LNA is to provide sufficient gain to overcome noise of other blocks. Amplifier design requires a matching circuit of impedance to have a low noise, achieve maximum power transfer and have minimum reflection. This paper presents a low noise amplifier that operates over the frequency range [9-13] GHz and adopts quarter-wave transformers impedance matching technique. Simulation and synthesis are made by using CAD software (ADS: Advanced Design System) addressed to simulations of RF circuits and which is developed by Agilent®. The proposed LNA is designed in HEMT process. As a result, the amplifier is unconditionally stable and achieves a 20 dB gain and a good impedance matching over the working frequency range of [9-13] GHz.
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Low Noise Amplifier (LNA); Matching Network; Microstrip; Quarter Wave Transformer; Transmission Lines

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