Abstract
In this paper a low noise amplifier (LNA) working at 2.45 GHz frequency which lies in ISM frequency band is demonstrated. Proposed LNA uses the cascoded topology with constant current source biasing methodology. This biasing technique is used to control the current flowing in the circuit so as to reduce the power consumption and cascoded stage is used to improve the gain of the LNA. Proposed topology of LNA is realized on 180-nm CMOS technology and all simulations are done using cadence virtuoso tool. Since LNA is a first active block of receiver system so we have tried to make the noise figure as low as possible while maintaining other parameters in acceptable range. The simulated results show that the proposed structure is able to provide the very low noise figure of 1.729 dB while maintaining the gain (S21) of 16.34 dB. We are also able to achieve a good input matching (S11) of − 26.82 dB and output matching (S22) of − 21.7 dB at input and output port, respectively. Because of cascoded stage we can achieve good isolation between input and output port (S12) of − 49.04 dB. Our proposed LNA circuit consume very less power of 5.2 mW.
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Kumar, S., Saraiyan, S., Saurabh, A., Dubey, S.K., Prasad, S., Islam, A. (2023). Design of a 2.45 GHz Cascode Low Noise Amplifier with π Matching Technique. In: Szymanski, J.R., Chanda, C.K., Mondal, P.K., Khan, K.A. (eds) Energy Systems, Drives and Automations. ESDA 2021. Lecture Notes in Electrical Engineering, vol 1057. Springer, Singapore. https://doi.org/10.1007/978-981-99-3691-5_18
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