Microwave isolator based on substrate-integrated waveguide-loaded ferrite

Abstract

The invention discloses a microwave isolator based on a substrate-integrated waveguide loaded with ferrite, which comprises a dielectric substrate, a soft ferrite column and a permanent magnet ferrite. The upper surface and the lower surface of the dielectric substrate are respectively provided with conductive The metal layer is provided with two rows of conductive vias on the dielectric substrate. The two rows of conductive vias and the conductive metal layers on the upper and lower surfaces form a substrate integrated waveguide. The dielectric substrate is also provided with A row of non-conductive through holes parallel to the conductive via holes, the soft ferrite column is located in the non-conductive via hole, and the permanent magnetic ferrite is located above the soft ferrite column. The microwave isolator of the present invention has the characteristics of small size, light weight, easy plane integration, etc., and also has the advantages of good heat dissipation, low cost, and easy realization.

Description

technical field [0001] The invention relates to a microwave isolator, in particular to a ferrite microwave isolator, more specifically to a microwave isolator loaded with ferrite based on a substrate integrated waveguide. Background technique [0002] In high-performance communication systems, high-isolation and small-volume isolators play a very important role. In order to ensure front-reverse isolation during signal transmission to protect the front-end circuit, especially between two-stage high-power devices, a high-performance isolator is one of the essential devices. In recent years, with the development of communication, radar and other technologies, microwave technology has also been widely used. The mainstream technology in these fields is planar microwave circuits. Require. The isolator in the microwave section often uses a ferrite isolator loaded with a metal waveguide. Although it can withstand high microwave power, the isolator with this structure is often comp...

AI Technical Summary

Problems solved by technology

The isolator in the microwave section often uses a ferrite isolator loaded with a metal waveguide. Although it can withstand high microwave power, the isolator with this structure is often complex in structure, expensive in cost, and difficult to integrate with planar circuits. Practical application requirements for integrated, high-performance isolators

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