A multi-stage 3db bridge circuit for high power synthesis

Abstract

The invention discloses a multilevel 3dB bridge circuit for high-power synthesis and relates to the technical field of a waveguide mode coupled apparatus. The input end of an input coupling circuit is connected with an input end matching network circuit sequentially through a first level input coupling microstrip line, a first level input 3dB bridge, a second level input 3dB bridge and a second level input coupling microstrip line; the input end of the input coupling circuit serves as the input end of the multilevel 3dB bridge circuit, the output end of the input end matching network circuit is connected with the grid of a field effect transistor, the drain electrode of the field effect transistor is connected with a first level output coupling microstrip line sequentially through an output end matching network circuit, a second level output coupling microstrip line, a second level output 3dB bridge and a first level output 3dB bridge; and the first level output coupling microstrip line is connected to serve as the output end of the multilevel 3dB bridge circuit. The multilevel 3dB bridge circuit for high-power synthesis stably operates and can be used for manufacturing a high-power microwave module.

Description

technical field [0001] The invention relates to the technical field of waveguide coupling devices, in particular to a 3dB bridge coupling device. Background technique [0002] Microwave power chips can be made based on conductor materials, and microwave power chips are called devices after being packaged. Devices and circuits are combined to make modules. A single device can realize a certain microwave power output, and multiple devices can realize the synthesis of multi-channel microwave power. To realize microwave power synthesis, microwave power synthesis circuits need to be fabricated. At present, microwave power synthesis circuits mainly include: 1) push-pull amplifier circuit; 2) Wilson power divider circuit; 3) single-stage 3dB bridge circuit. For hundreds of watts of power synthesis, the push-pull amplifier circuit and the Wilson power divider circuit work unstable, prone to self-excitation, and easily cause chip burnout. The 3dB bridge circuit has good stability ...

AI Technical Summary

Problems solved by technology

However, at present, the 3dB bridge circuit is mostly used for two-way power synthesis, and the output power can only reach 100W, and the combined power is small.

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