Multi-slit coupling directional coupler based on integrated substrate gap waveguides

Abstract

The invention relates to a multi-slit coupling directional coupler based on integrated substrate gap waveguides. The multi-slit coupling directional couplercomprises two integrated substrate coupling gap waveguides with the same structure, and is characterized in that each integrated substrate coupling gap waveguide comprises a via hole layer dielectric plate and a gap layer dielectric plate, a first metal ground layer is printed on the upper surface of the via hole layer dielectric plate, a first coupling microstrip line and a first circular metal patch are printed on the lower surface, the first coupling microstrip line comprises a first rectangular section and a first linear section, a second coupling microstrip line is printed on the upper surface of the gap layer dielectric plate, a second metal ground layer is printed on the lower surface, the second metal ground layer is provided with a plurality of coupling gaps, the second coupling microstrip line comprises a second rectangular section and a second straight line section, the coupling gaps are located under the second rectangular section, the lower surface of the via hole layer dielectric plate is tightly attached to the upper surface of the gap layer dielectric plate, and the two integrated substrate coupling gap waveguides of the same structure are oppositely arranged after rotating by 180 degrees. According to the invention, wide bandwidth and high isolation can be realized at the same time.

Description

technical field [0001] The invention relates to the field of millimeter wave devices, in particular to a multi-slit coupling directional coupler based on an integrated substrate gap waveguide. Background technique [0002] Directional coupler is an important microwave and millimeter wave device, which can be used for signal isolation, separation and mixing, such as power monitoring, source output power stabilization, signal source isolation, frequency sweep test of transmission and reflection, etc. The forms of couplers mainly include metal waveguide couplers and microstrip couplers. With the development of 5G communication systems, the frequency requirements for microwave and millimeter wave devices are getting higher and higher. However, the traditional metal waveguide coupler structure is not easy to integrate, and the microstrip coupler application has a large loss at high frequencies, which limits its in high frequency applications. [0003] Substrate Integrated Waveg...

AI Technical Summary

Problems solved by technology

[0005] The current types of couplers are mainly branch line coupling and hole (gap) coupling. The coupler realized by branch line coupling has a relatively narrow bandwidth, and the structure is relatively complicated by cascading branch lines.

Images