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Quasi-surface plasmon-based leaky-wave antenna

A surface plasmon, leaky wave antenna technology, applied in the directions of leaky waveguide antennas, antennas, electrical components, etc., can solve the problems of complex design methods, and achieve the effects of simple structure, reduced mutual coupling, and easy directional radiation.

Inactive Publication Date: 2016-01-20
SOUTHEAST UNIV
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Problems solved by technology

However, this scheme only uses the quasi-surface plasmon waveguide as the series feed network of the array antenna, which needs to be matched with the microstrip antenna array or the patch antenna array. The gap between them is determined, and it is much higher than the leaky wave antenna in the form of traditional printed circuit boards
Moreover, the radiation characteristics of the antenna are mainly determined by the position of the array elements, which cannot be directly given by theoretical formulas, and the design method is relatively complicated

Method used

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Embodiment Construction

[0031] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0032] The basic idea of ​​the present invention is to realize the conversion of electromagnetic waves between the TEM mode or the quasi-TEM mode and the quasi-surface plasmon mode with a gradual matching structure, and use the quasi-surface plasmon waveguide with a phase velocity modulation structure as the radiation unit , that is, the quasi-surface plasmon waveguide as a radiation unit can produce discontinuous changes in the phase velocity of the quasi-surface plasmon that it transmits, so that the discontinuity of the quasi-surface plasmon waveguide can be used to excite the space radiation.

[0033] In order to facilitate the precise control of the radiation direction and radiation efficiency, the present invention preferably adopts a quasi-surface plasmon waveguide with periodic phase velocity modulation, that is, the phase velocity of the transm...

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Abstract

The invention discloses a quasi-surface plasmon-based leaky-wave antenna, and belongs to the technical field of microwaves. The leaky-wave antenna comprises a feed network and a radiating element, wherein the feed network comprises a gradient matching structure; the gradient matching structure is used for achieving conversion of an electromagnetic wave between a TEM mode or a quasi-TEM mode and a quasi-surface plasmon mode; and the radiating element is a quasi-surface plasmon waveguide capable of enabling the phase velocity of the transmitted quasi-surface plasmon to discontinuously change. Compared with the prior art, the radiating element of the leaky-wave antenna is achieved on the basis of the quasi-surface plasmon waveguide for a phase velocity modulation; the quasi-surface plasmon-based leaky-wave antenna is simple in structure, relatively small in interference to an external circuit and relatively easy to process, and does not need metal ground; and omnidirectional radiation and frequency scanning functions are relatively easy to achieve.

Description

technical field [0001] The invention relates to a leaky-wave antenna, in particular to a leaky-wave antenna based on quasi-surface plasmon polaritons, which belongs to the field of microwave technology. 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, coverage and frequency scanning capabilities of antennas have attracted more and more attention. As a kind of traveling wave antenna, leaky wave antenna can be divided into two categories: fast wave leaky wave antenna and slow wave leaky wave antenna. As a common fast-wave leaky-wave antenna, the waveguide slot antenna is fabricated by etching slots on the metal waveguide, but its design process is relatively complicated. Although a planar array composed of multiple waveguide slot antennas can obtain a relatively ideal radiation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/22H01Q13/08
Inventor 马慧锋孔故生刘艳青崔铁军
Owner SOUTHEAST UNIV
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