Core Functionality
The LNA amplifier performs the core task of signal amplification at the receiver end of a radar system. After being reflected by a target, the signal transmitted by the radar is significantly attenuated and becomes extremely weak by the time it reaches the receiver.
The LNA amplifier effectively amplifies these weak reflected signals, bringing them to a level that can be recognized by subsequent signal processing circuits, providing the fundamental signal source for the entire radar system to acquire target information.
Noise Suppression
During signal amplification, LNA amplifiers significantly suppress noise interference. Radar operating environments are subject to various electromagnetic noises. Excessive noise in the amplifier circuit itself can mask weak target signals.
Low-noise LNA amplifiers can amplify signals while reducing their own noise, ensuring the signal-to-noise ratio of the useful signal is not excessively degraded, thus ensuring signal recognition.
Enhanced Sensitivity
Improving the radar system's receiver sensitivity is a crucial role for LNA amplifiers. Sensitivity determines the maximum distance and smallest target a radar can detect.
By efficiently amplifying weak signals, LNA amplifiers reduce the system's signal strength requirements, enabling radar to capture signals reflected from targets farther away or smaller, extending the detection range.