Miniaturized substrate integrated waveguide based on metamaterial

Abstract

The invention relates to a miniaturized substrate integrated waveguide based on a metamaterial and aims at achieving integrated waveguide miniaturization under the condition that the working band width is ensured. The miniaturized substrate integrated waveguide comprises two 50omega microstrip lines and two microstrip line and substrate integrated waveguide conversion structures. each 50omega microstrip line is of a metal strip structure. Each microstrip line and substrate integrated waveguide conversion structure is a gradually wide metal strip. Wide-end mirror images of the microstrip line and substrate integrated waveguide conversion structures are fixed at the middle positions of the left and right sides of a dielectric slab. One end of each of two omega microstrip lines is respectively connected with the narrow ends of the microstrip line and substrate integrated waveguide conversion structures to form an integral structure. The upper portion and the lower portion of the dielectric slab are correspondingly provided with 2N metal through holes. Interdigital capacitor slots are etched between the through holes at the upper portion and the lower portion of the dielectric slab. The miniaturized substrate integrated waveguide serves as an integrated waveguide device.

Description

technical field [0001] The invention relates to a substrate integrated waveguide based on a supernormal medium. Background technique [0002] In recent years, Wu Ke and other scholars proposed a new type of low-profile substrate-integrated waveguide (SIW). The substrate-integrated waveguide is a new type of microwave transmission line, which is realized by reasonably laying two rows of metal vias on both sides of the printed circuit board (PCB). Utilizing this technology can not only reduce the size, weight and cost of traditional waveguides, but also greatly improve the feasibility and reliability of processing, so it is beneficial to produce integrated waveguide devices, especially when combined with supernormal media, it can design Better waveguide devices. [0003] Supernormal media are artificially designed special structures with abnormal electromagnetic properties. Due to their abnormal electromagnetic properties, they have received extensive attention in the microw...

AI Technical Summary

Problems solved by technology

[0004] Yuan Dang Dong et al. proposed to etch a complementary resonant ring (CSRR) on the upper surface of the substrate integrated waveguide to design a miniaturized narrowband filter, and finally obtained a narrowband frequency band below the cutoff frequency. However, since the CSRR is a resonant structure, the narrowband The bandwidth is very narrow, the relative bandwidth is only about 6%, which limits its use in the design of broadband devices

Then on this basis, they proposed a substrate-integrated waveguide based on a transmission line structure, but there is still a shortcoming that the bandwidth is too narrow, and the relative bandwidth is only 6.5%.

Images