| 摘要 |
The present disclosure relates to a slotted waveguide antenna system. The slotted waveguide antenna system includes a waveguide that includes a first surface and a plurality of slots defined in the first surface and a metamaterial structure positioned external to the waveguide. The metamaterial structure is configured to exhibit a negative effective permittivity and a negative effective permeability for an operating frequency range. The metamaterial structure includes a split ring resonator, a substrate and a wire structure. The wire structure includes a first portion, a second portion and a third portion, the second portion coupled between the first portion and the second portion, the first portion oriented parallel to the third portion, the second portion oriented perpendicular to the first portion and the third portion. A dimension of at least one of the first portion and the third portion is related to the operating frequency range. |
| 主权项 |
1. A system comprising:
a slotted waveguide antenna comprising a waveguide configured to enclose a waveguide cavity, the waveguide comprising a first surface and a plurality of slots defined in the first surface, each slot configured to transmit and receive electromagnetic waves with frequencies in an operating frequency range; and a metamaterial structure positioned external to the waveguide, the metamaterial structure configured to exhibit a negative effective permittivity and a negative effective permeability for the operating frequency range, the metamaterial structure comprising:
a split ring resonator comprising an outer split ring and a concentric inner split ring, each split ring comprising a respective conductive portion defining a respective nonconductive gap,a substrate having a first surface and an opposing second surface, the split ring resonator formed on the first surface of the substrate, anda conductive wire structure formed on the opposing second surface of the substrate, the conductive wire structure comprising a first portion, a second portion and a third portion, the second portion coupled between the first portion and the third portion, the first portion oriented parallel to the third portion, the second portion oriented perpendicular to the first portion and the third portion, wherein a dimension of at least one of the first portion and the third portion is related to the operating frequency range, the substrate is positioned between the split ring resonator and the wire structure and the metamaterial structure has a thickness comprising a thickness of the substrate, a thickness of the split ring resonator and a thickness of the conductive wire structure. |
