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Same-frequency dual circularly polarized leaky-wave antenna based on artificial surface plasmons

An artificial surface plasmon and dual circular polarization technology, applied in the microwave field, can solve problems such as not being able to directly support surface plasmons, and achieve the effects of improving electromagnetic wave acceptance, easy integration, and convenient operation

Active Publication Date: 2019-05-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, metals exhibit ideal electrical conductor properties in the microwave range, and cannot directly support surface plasmons at the interface between metal and dielectric.

Method used

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  • Same-frequency dual circularly polarized leaky-wave antenna based on artificial surface plasmons
  • Same-frequency dual circularly polarized leaky-wave antenna based on artificial surface plasmons
  • Same-frequency dual circularly polarized leaky-wave antenna based on artificial surface plasmons

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] The leaky wave antenna of the present invention includes a dielectric substrate, a metal strip and a metal floor; the metal strip covers the upper surface of the dielectric substrate, and the metal floor covers the lower surface of the dielectric substrate; the material of the dielectric substrate is F4BK225, the thickness ts=2mm, and the antenna is completely The length is 311.65mm.

[0032] Such as figure 1 As shown, the metal strip includes a coplanar waveguide matching structure 1 at both ends and an artificial surface plasmon structure 2 in the middle; the artificial surface plasmon structure includes two upper and lower sidebands, and each sideband includes several artificial surfaces, etc. From the polariton unit structure, the artificial surface plasmon unit structure is the slotted unit structure. The slotted unit structure forms an angle of 90° betwee...

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Abstract

The invention discloses an artificial surface plasmon based same-frequency double-frequency dual-circularly-polarized leaky-wave antenna. The artificial surface plasmon based same-frequency double-frequency dual-circularly-polarized leaky-wave antenna comprises a medium substrate, a metal strip which covers the upper surface of the medium substrate and a metal floor plate which covers the lower surface of the medium substrate; the metal strip comprises co-surface waveguide matching structures at two ends and an artificial surface Plasmon structure in the middle; the artificial surface Plasmon structure comprises two sidebands respectively at the upside and the downside; each sideband comprises multiple artificial surface plasmon structures distributed according to a modulation period; groove unit structures between the upper and lower sidebands form an angle of 90 degrees; and the upper and lower sidebands are staggered symmetrically. The invention is a double-port leaky-wave antenna; different radiation modes are generated when feeding is carried out at different ports; dual-mode circular polarization can be realized within 8.6-9.0 GHz; mono-mode circular polarization can be realized with in 9.0 GHZ-10.5 GHz; and the artificial surface plasmon based same-frequency double-frequency dual-circularly-polarized leaky-wave antenna is simple to manufacture and convenient to operate, and has very high application foreground.

Description

technical field [0001] The invention relates to microwave technology, in particular to a same-frequency dual circularly polarized leaky-wave antenna based on artificial surface plasmons. Background technique [0002] As an important part of modern communication systems, antennas are mainly used to radiate and receive electromagnetic energy. With the continuous improvement of society's requirements for communication systems, the gain, frequency scanning capability and circular polarization working mode of antennas have attracted much attention. At the same time, with the rapid development of communication technology, simple linearly polarized antennas are difficult to meet the needs of the system, and the construction of antennas with circular polarization patterns is very important. In the leaky wave antenna, the design of circular polarization is also very important. There are many classification methods for microstrip leaky-wave antennas, and the method of classification ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q15/00
CPCH01Q1/38H01Q1/48H01Q1/50H01Q15/00
Inventor 马慧锋王萌栾康魏楠崔铁军
Owner SOUTHEAST UNIV
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