Terahertz substrate integrated waveguide-microstrip transition structure

Abstract

The invention provides a terahertz substrate integrated waveguide-microstrip transition structure, and aims to provide a radio-frequency signal transmission structure, which is simple in structure and easy to process and can be widely applied to a terahertz planar circuit to realize plane interconnection. The terahertz substrate integrated waveguide-microstrip transition structure provided by the invention is realized through the scheme as follows: metalized through hole arrays (3) are arranged at two sides of the rectangle of a substrate integrated waveguide (1) in the length direction according to a linear array; a multi-layer gradual-change substrate integrated waveguide transition structure (4) connected with a plane microstrip (5) at the same side is arranged on the coplanar board surface of a convex joint body, where the broad side at one side of the rectangle is in butt joint with a radio-frequency output port (6); the substrate integrated waveguide couples terahertz signal energy to the dielectric layer of a single-layer dielectric substrate (2); a section of multi-layer gradual-change substrate integrated waveguide transition structure is interconnected with the plane microstrip, so that broadband terahertz signals are transmitted; due to the multi-layer gradual-change substrate integrated waveguide transition structure, the TE10 mould of the substrate integrated waveguide is converted into the TEM mould of the plane microstrip; and finally, output is carried out through the radio-frequency output port.

Description

technical field [0001] The invention relates to a waveguide structure for realizing broadband terahertz signal transmission, in particular to a terahertz substrate integrated waveguide-microstrip transition structure suitable for effective interconnection between planar circuits in the terahertz frequency band. Background technique [0002] Due to the penetrability of terahertz waves, strong reflectivity to metal materials, and extremely high frequency characteristics, the imaging resolution of terahertz waves has been greatly improved, and the perspective images are clearer. Dangerous items such as guns and firearms can be displayed more realistically. If combined with the material identification technology of terahertz waves, it can even directly distinguish whether the human body is carrying explosives or drugs. In addition to terahertz signal sources, the application of terahertz must also solve the transmission problem of terahertz signals, which also includes the inter...

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Problems solved by technology

Among these structures, some guided wave structures are particularly suitable for effective interconnection of tera

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