Broadband substrate integrated waveguide circulator

Abstract

The invention discloses a broadband substrate integrated waveguide circulator and belongs to the technical field of microwave devices. The broadband substrate integrated waveguide circulator comprises a rectangular dielectric substrate 5, a back metal floor and a front metal pattern. A metal pattern 1 in a regular triangle shape is positioned in the middle of the front metal pattern, and the metal pattern 1, the dielectric substrate 5 and the back metal floor form a three-port substrate integrated waveguide structure in 120-degree rotational symmetry. The substrate integrated waveguide structure comprises a central round window, and a central junction gyromagnetic ferrite 3 is internally arranged in the round window. Three ports of the substrate integrated waveguide structure are formed by connecting three trapezoidal micro-strip transition lines 2 in quarter central wavelength with three 50-ohm standard micro-strip lines 6 serving as a T-type port and positioned at the edge of the substrate 5. The broadband substrate integrated waveguide circulator has high isolation performance within all X-bands (8.2GHz-12.4GHz), low insertion loss and low port standing waves, and has the advantages of miniaturization, high power, integration and low cost.

Description

technical field [0001] The invention belongs to the technical field of microwave devices, in particular to a broadband substrate integrated waveguide circulator. Background technique [0002] Since microwave ferrite devices stepped onto the stage of history in the 20th century, especially after nearly 30 years of rapid development, the application of microwave ferrite devices has rapidly expanded to the fields of civil communication, industry, agriculture and medicine. In recent years, the rapid development of civilian electronics industry (especially electronic communication) and monolithic integration technology (MMIC), coupled with the more stringent requirements of military devices in terms of size, performance, bandwidth, reliability and environmental survivability, Equipment such as microwave communication requires the development of the whole machine in the direction of integration, and microwave ferrite devices, such as circulators and isolators, must also follow the...

AI Technical Summary

Problems solved by technology

[0005] Circulators with a planar structure include SIW circulators and microstrip circulators. These planar devices are small in size, light in weight, easy to integrate, and low in cost. However, ordinary chips have insufficient bandwidth, and the bandwidth is very narrow, making it difficult to achieve full frequency band.

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