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This paper demonstrates designing and developing of an Ultra-Low NoiseAmplifier which should potentially increase the sensitivity of the existingMagnetic Resonance Imaging (MRI) systems. The Design of the LNA is fabricatedand characterized including matching and input high power protection circuits.The estimate improvement of SNR of the LNA in comparison to room temperatureoperation is taken here. The Cascode amplifier topology is chosen to beinvestigated for high performance Low Noise amplifier design and for thefabrication. The fabricated PCB layout of the Cascode LNA is tested by usingmeasurement instruments Spectrum Analyser and Vector Network analyzer. Themeasurements of fabricated PCB layout of the Cascode LNA at room temperaturehad the following performance, the operation frequency is 32 MHz, the noisefigure is 0.45 dB at source impedance 50 {\Omega}, the gain is 11.6 dB, theoutput return loss is 21.1 dB, and the input return loss 0.12 dB and it isunconditionally stable for up to 6 GHz band. The goal of the research isachieved where the Cascode LNA had improvement of SNR.

Ultra-Low Noise Amplifier Design for Magnetic Resonance Imaging systems