Abstract
For 5G communication, both sub-6G and millimeter wave bands have their own advantages, while low-noise amplifier (LNA) is an essential component of the first stage of 5G receiving system, and its performance plays a crucial role in the overall performance of the receiving system. Therefore, LNAs applicable to ultra-wideband reconfigurable can make full use of both high and low frequency bands, which is one of the research focuses of 5G communication development at this stage. In this paper introduces ultra-wideband low-noise amplifiers and their methods of achieving reconfigurability, explaining the development advantages and limitations of each method separately.
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