Full-modal-waveguide-structure-based substrate-integrated waveguide directional coupler

Abstract

The invention, which belongs to the technical field of integrated waveguide, puts forward a full-modal-waveguide-structure-based substrate-integrated waveguide directional coupler. The substrate-integrated waveguide directional coupler comprises a first layer dielectric substrate, a second layer dielectric substrate, and a port. An upper metal layer is arranged on the upper surface of the first layer dielectric substrate; and a coupling metal layer is arranged on the lower surface of the first layer dielectric substrate. The upper metal layer includes an upper metal layer feeding structure and a waveguide upper surface; and coupling holes are formed in the coupling metal layer. The upper surface of the second layer dielectric substrate is in contact with the coupling metal layer arranged at the lower surface of the first layer dielectric substrate. A lower metal layer is arranged on the lower surface of the second layer dielectric substrate and includes a lower metal layer feeding structure and a waveguide lower surface. Metallic via hole arrays are arranged at the two long sides of the upper metal layer and the lower metal layer. The structure of the directional coupler becomes compact, so that the horizontal dimension of the directional coupler is reduced substantially; and the practical performances of the directional coupler are improved.

Description

technical field [0001] The invention relates to a substrate integrated waveguide directional coupler based on a full-mode waveguide structure, belonging to the technical field of integrated waveguides. Background technique [0002] Dielectric integrated waveguide (Substrate Integrated Waveguide, SIW) is a waveguide structure that achieves transmission characteristics similar to metal rectangular waveguide on a dielectric substrate. The research hotspot is also widely used in the design of microwave passive devices. With the help of printed circuit technology, low-cost mass production of high-performance microwave passive devices based on dielectric integrated waveguides becomes possible. [0003] The waveguide directional coupler is a very common device in microwave and millimeter wave systems. It is used together with the power divider for power synthesis or power distribution applications. In microwave measurement, a part of the energy can be obtained by using the directi...

AI Technical Summary

Problems solved by technology

Most of the integrated waveguide directional couplers in the prior art adopt the narrow-wall coupling method, which has a large lateral size, which is not conducive to the miniaturization design of the device

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