Artificial surface plasmon-based low-loss transmission line

Abstract

The invention provides an artificial surface plasmon-based low-loss transmission line, which comprises a dielectric substrate and a metal structure, wherein the metal structure is arranged on the dielectric substrate and comprises a coplanar waveguide, a coupling structure and an artificial surface plasmon transmission line; the artificial surface plasmon transmission line is sequentially connected with the coupling structure and the coplanar waveguide from the middle part to two ends; the coupling structure comprises an open curved metal structure and a periodic metal structure; the open curved metal structure extends outside from the coplanar waveguide; the groove depth of the periodic metal structure gradually changes; the artificial surface plasmon transmission line comprises periodically arranged metal units; grooves vertical to the length directions of periodically arranged artificial surface plasmons are formed in the metal units; the grooves are located at the same sides of the periodically arranged artificial surface plasmons; and the grooves are the same in depth and width. Compared with a microstrip line with the same size in a relatively wide band, the artificial surface plasmon-based low-loss transmission line has the advantage that the artificial surface plasmon transmission line has lower transmission loss.

Description

Technical field [0001] The invention is a low-loss transmission line combined with artificial surface plasmons, and belongs to the field of new artificial electromagnetic materials. Background technique [0002] New type of artificial electromagnetic materials (Metamaterials) refer to artificial composite materials with special conduction or radiation characteristics when electromagnetic waves propagate in them. It can also be said to be an electromagnetic material that can be artificially designed to meet specific equivalent permittivity and permeability requirements. . The new artificial electromagnetic material is based on the equivalent medium theory, that is, the equivalent dielectric constant and magnetic permeability can be changed by changing the size of the unit structure of the new artificial electromagnetic material. After more than ten years of development, new artificial electromagnetic materials have been developed by leaps and bounds, and are widely used in stealt...

AI Technical Summary

Problems solved by technology

[0004] The loss of the microwave transmission line is an important issue in the electronic transmission system, because the loss may lead to problems such as signal distortion

For traditional microstrip lines, it is difficult to control the loss by adjusting the structural parameters

Therefore, people choose low-loss materials and introduce additional air layer substrates to reduce losses, but these methods increase structural complexity and manufacturing costs

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