A grounded coplanar waveguide-rectangular waveguide filter transition structure

Abstract

A grounded coplanar waveguide-rectangular waveguide filter transition structure, comprising: a substrate (1), the upper and lower surfaces of which are coated with metal layers; a grounded coplanar waveguide transmission line (2), printed on the upper surface of the substrate with a metal layer (1‑1) on, used to input electromagnetic waves; broadband filter transition structure (3), etched on the metal layer (1‑2) on the lower surface of the substrate, connected to the rectangular waveguide (5), including feeding stubs (3‑1), shorting stubs (3-3), coupling stub (3-2) and resonant cavity, used for broadband transmission of electromagnetic waves and out-of-band suppression performance; the first metallized via hole (4), through the substrate (1), connects the grounded coplanar waveguide The output end of the transmission line (2) is connected with the feeding stub (3-1). On the one hand, the transition structure can be grounded by setting the broadband filtering transition structure (3) at the bottom of the substrate (1) to avoid large radiation loss; It increases the operating bandwidth of electromagnetic wave transmission and has good out-of-band suppression filtering performance.

Description

technical field [0001] The present disclosure relates to the technical field of millimeter wave terahertz research, and in particular, to a grounded coplanar waveguide-rectangular waveguide filtering transition structure. Background technique [0002] With the development of terahertz technology in the field of wireless communication, monolithic integrated circuits, hybrid integrated circuits and integrated micro-systems have broad application prospects in communication, radar and other fields. Grounded Coplanar Waveguide (GCPW for short) is a planar circuit transmission line with small dispersion and low loss. It is very easy to realize series and parallel connection with passive and active devices, which can significantly improve circuit density and transmission efficiency; rectangular waveguides (RectangularWaveguide, abbreviated RWG) has the characteristics of simple structure, stable mechanical properties, low loss, etc., and has become the most commonly used packaging ...

AI Technical Summary

Problems solved by technology

Although the transition mode of gap coupling can provide a simple micro-assembly process, the insertion loss of the structure is large due to the radiation loss caused by its resonant mode.

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