کنفرانس مهندسی برق ایران

صفحه اصلی / سی امین کنفرانس بین المللی مهندسی برق

A Design Technique For Linear Desensitized LNAs

نویسندگان :

Masoumeh Sabzi¹ Mahmoud Kamarei² Yann Mahe³ Tchanguiz Razban-Haghighi⁴

1- دانشگاه تهران 2- دانشگاه تهران 3- University of Nantes 4- University of Nantes

کلمات کلیدی :

Parallel amplifiers, Low noise amplifier (LNA), Noise figure ‎‎(NF), Sensitivity, Output Power‎

چکیده :

A new analytical design procedure utilizing adding a parallel ‎amplifier for low noise amplifiers (LNA) is presented. In this ‎method, the linearity and noise figure (NF) of the LNA is ‎investigated in order to improve the LNA performance. Using the ‎noise Correlation matrix (CA), the noise parameters of the ‎parallel network is calculated. It is proven that using this method, ‎the input impedance is less sensitive to noise matching. To ‎evaluate the proposed approach, two different LNAs using single ‎and two parallel paths are designed and the Electromagnetic ‎momentum (EM) simulation results are compared. EM ‎simulation result for the designed 9-12 GHz LNA with the 0.1-µm ‎pseudomorphic GaAs pHEMT model is reported to support ‎proposed theories. The results represent that using the parallel ‎method the linearity, input and output impedance matching, NF ‎and gain can improve with a 30% increase in power consumption.

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بیشتر

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