1results about How to "Reduce equivalent impedance" patented technology

The application provides a harmonic suppression radio frequency power amplifier, wherein one end of an input matching circuit is connected with a radio frequency input end; the other end of the input matching circuit is connected with a base of a power amplifier tube; a collector of the power amplifier tube is connected with a power supply voltage through a first matching branch; an emitter of the power amplifier tube is connected with a first connecting point on a packaging substrate; the collector of the power amplifier tube is connected with a radio frequency output end through a second matching branch; the second matching branch is connected with the packaging substrate; a first end of a harmonic control circuit is connected with the collector of the power amplifier tube; a second end of the harmonic control circuit is connected with a second connecting point on the packaging substrate; a metal layer farthest from the power amplifier tube in a plurality of metal layers of the packaging substrate is a first metal layer; the first connecting point and the second connecting point are located on a second metal layer in the plurality of metal layers, and the first connecting point is connected with the second connecting point; and the second metal layer is a metal layer closest to the power amplifier tube in the plurality of metal layers.