Flexible Low Noise Amplifier for IoT Applications in Biomedical Devices

This study focuses on the critical role of Low Noise Amplifiers (LNAs) in achieving low noise and high gain in wireless systems and IoT-based sensing applications. The emphasis on straightforward design is particularly relevant for wearable IoT contexts. The research centers on the creation of a single-stage LNA with notable gain, stability, and noise figure (NF) attributes. The evaluation of this LNA's performance and utility includes an in-depth analysis of its gain, noise figure, and stability characteristics. The design employs a Low Noise Gallium Arsenide FET transistor, optimizing its potential through the application of lumped components for input and output side matching. The outcomes of the study reveal impressive features of the suggested LNA design, notably a forward gain of 16.5 dB and a noise figure of 0.6 dB at a frequency of 2.4 GHz. This renders the LNA suitable for integration with sensors operating in the lower frequency ranges, aligning well with the LS frequency band. A key aspect of the design is its suitability for wearable IoT and disposable biomedical applications, achieved by minimizing component count without compromising performance. In summary, the research underscores the importance of LNAs in enhancing signal quality and presents a well-optimized single-stage LNA design. The outcomes position this LNA as a robust solution for wearable IoT scenarios, underscoring its gain, noise figure, and stability advantages while aligning with the frequency requirements of sensors.