Wideband intermatch power amplifier

Abstract

The invention discloses a wideband intermatch power amplifier. The wideband intermatch power amplifier comprises an input port, Lange couplers, bandpass filtering impedance transforming circuits, stabilizing networks, power chips and an output port, wherein the input port is connected with a first port of the first Lange coupler; a third port and a fourth port of the first Lange coupler are respectively connected with inputs of the first bandpass filtering impedance transforming circuit and the third bandpass filtering impedance transforming circuit; the input terminal of the first bandpass filtering impedance transforming circuit is connected with the input of the first stabilizing network; the output of the first stabilizing network is connected with a first terminal of the first power chip; a second terminal of the first power chip is connected with the input of the third bandpass filtering impedance transforming circuit; the output of the third bandpass filtering impedance transforming circuit is connected with a first port of the second Lange coupler. The wideband intermatch power amplifier can draw both wide band and high gain indicators into consideration, utilizes the Lange couplers for power synthesis, improves the input and output standing waves and facilitates front-and-back-stage multi-tube cascade application.

Description

Technical field [0001] The invention relates to the field of communication, in particular to a broadband internal matching power amplifier. Background technique [0002] Communication, radar and microwave measurement systems all require internal matching power amplifiers. [0003] In the design of internal matching power amplifiers, there are mainly four commonly used ways to increase bandwidth: balanced amplifiers, negative feedback amplifiers, lossy matched amplifiers, and active matched amplifiers. Balanced amplifiers can double the frequency or slightly wider; negative feedback amplifiers introduce feedback resistors, which expand the frequency at the expense of gain and reduce output power; lossy matched amplifiers can also reduce gain; active matched amplifiers can Amplification of 10 times the frequency range is obtained, but its DC power consumption is large, the matching between stages is difficult, and the reliability is low. Summary of the invention [0004] The purpose...

AI Technical Summary

Problems solved by technology

Balanced amplifiers can achieve frequency multiplication or slightly wider; negative feedback amplifiers, due to the introduction of feedback resistors, expand frequency at the expense of gain and reduce output power; lossy matched amplifiers also reduce gain; active matched amplifiers can Obtain 10-octave frequency amplification, but its DC power consumption is large, the matching between stages is difficult, and the reliability is low

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