Circuit and method for improving coupling directionality

Abstract

The invention relates to a high-power amplifier synthesis circuit, in particular to a circuit and a method for improving coupling directionality. The circuit for improving the coupling directionality comprises ports, a load, a power allocation circuit, two high-power amplifiers and a coupling circuit, wherein the ports comprise an input port, an output port and a reflector port; the input port is connected with the power allocation circuit; the power allocation circuit is connected with the two high-power amplifiers; and the high-power amplifiers are connected with the reflector port by the coupling circuit. When the circuit is used, a coupler is arranged at the front end of an output combination bridge to couple two paths of signals, and the two paths of signals are combined by the output combination bridge. By the circuit and the method, the influence of reflected signals on the coupling circuit is reduced, the directionality of the coupling circuit is greatly improved, problems caused by the absence of proper high-power isolators under high-power conditions are solved, and simultaneously, cost is greatly saved because the isolator is cancelled.

Description

technical field [0001] The invention relates to a high power amplifier synthesis circuit, in particular to a circuit and method for improving coupling directivity. Background technique [0002] With the development of the field of RF design, RF applications have entered various fields of our lives, the power of RF modules is getting higher and higher, and the requirements for the directionality of the coupling circuit are also getting higher and higher, which increases the difficulty of the coupling circuit. The directivity of the coupler is a measure of the ability of the coupler to separate the forward and reverse wave components. In applications, it usually requires good directivity. Poor directivity will limit the detection accuracy, and even there is a small mismatch on the straight-through transmission line. , it can also cause changes in the coupling power level. [0003] The traditional signal coupling method is to use a microstrip coupler or a dielectric coupler to...

AI Technical Summary

Problems solved by technology

Due to the limited isolation of the isolator itself, its coupling directivity is not very high

At the same time, with the increase of amplifier power, it is difficult to make a high-power isolator that is compact and can meet the power requirements with the current manufacturing process, so the directivity of the coupler will be very poor, and it is very easy to be affected by the reflected signal at the output port. influenc

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