Low noise amplifier and ultra-wideband receiver

A low noise amplifier, at least comprising a first amplifying unit, the first amplifying unit includes a first common-source amplifier transistor, a second common-source amplifier transistor, a first negative feedback unit, a second negative feedback unit and an inter-stage matching unit, the inter-stage matching unit includes a sixth inductor, a first transmission line inductor and a fourth capacitor, one terminal of the sixth inductor is in connection with a drain of the first common-source amplifier transistor, and another terminal of the sixth inductor is in connection with a terminal of the fourth capacitor to form a feedback node, the first transmission line inductor is in suspended connection with the feedback node, and another terminal of the fourth capacitor is in connection with a gate of the second common-source amplifier transistor, the first negative feedback unit is in cross-connection between a gate of the first common-source amplifier transistor and the feedback node, and the second negative feedback unit is in cross-connection between a drain of the second common-source amplifier transistor and a feedback node, a gate of the first common-source amplifier transistor is an input terminal of the first amplifying unit, and a drain of the second common-source amplifier transistor is an output terminal of the first amplifying unit.