Leaky-wave antenna for improving radiation efficiency and design method of leaky-wave antenna

A leaky-wave antenna and radiation efficiency technology, applied in leaky waveguide antennas, antennas, antenna arrays, etc., can solve problems such as complex structural design and difficult implementation, and achieve simple feeding, compact structure, and good practicability

Active Publication Date: 2016-08-31
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0005] The object of the present invention is to provide a leaky-wave antenna with improved radiation efficiency and a design method of the leaky-wave antenna, which can effectively improve radiation efficiency and gain, and solve the problem of complex structural design and difficult implementation of ways to improve radiation efficiency in the prior art. problems, and at the same time expand the application occasions and practical scope of the leaky wave antenna

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  • Leaky-wave antenna for improving radiation efficiency and design method of leaky-wave antenna
  • Leaky-wave antenna for improving radiation efficiency and design method of leaky-wave antenna
  • Leaky-wave antenna for improving radiation efficiency and design method of leaky-wave antenna

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[0037] In order to illustrate the present invention more clearly, the present invention will be further described below with reference to the preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0038] The traditional leaky-wave antenna using the fundamental wave radiation method has a fixed main lobe direction. However, for a slot leaky-wave antenna with a uniform period, when the slot period P is changed within an appropriate range, in addition to the fundamental wave radiation, other spatial harmonics may also generate radiation, and the propagation constants of the radiated harmonics will change significantly with the period. , so the change of the spatial harmonic beam pointing can be achieved by changing t...

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Abstract

The invention discloses a leaky-wave antenna for improving radiation efficiency and a design method of a leaky-wave antenna. The leaky-wave antenna comprises a power divider and an antenna array. First leaky-wave antennas having periodic structures and second leaky-wave antennas having periodic structures are arranged at intervals to form the antenna array. The first leaky-wave antennas are different from the second leaky-wave antennas; and the radiation directions of the first leaky-wave antennas are identical with those of the second leaky-wave antennas. A certain first leaky-wave antenna or second leaky-wave antenna in the antenna array feeds external energy and carries out radiation; and the other end feeds the rest of energy after radiation into adjacent leaky-wave antennas at two sides respectively by the power divider. The first leaky-wave antenna or second leaky-wave antenna feeding the external energy carries out radiation respectively towards the leaky-wave antennas at directions of two sides and feeds the rest of energy after radiation into the adjacent leaky-wave antennas without feeding until the radiation efficiency meets a design requirement or radiation of the leaky-wave antennas at the outermost side of the antenna array have done. Therefore, the radiation efficiency of the leaky-wave antenna is improved.

Description

technical field [0001] The present invention relates to the technical field of electronics and communication. More specifically, it relates to a leaky wave antenna with improved radiation efficiency and a design method of the leaky wave antenna. Background technique [0002] The leaky wave antenna has the advantages of frequency scanning ability, strong directivity, and simple feeding structure. However, the radiation efficiency of general leaky wave antennas is relatively low, because when the energy reaches the end of the antenna, only a part of the energy is leaked and radiated, and the remaining energy needs to be absorbed by the matching load at the end. In order to improve its radiation efficiency, a basic way is to increase the length of the antenna, however, for a typical leakage constant, to achieve 90% radiation efficiency, the antenna needs to be as long as 8-10 wavelengths. And this size is impractical in most microwave wireless systems. [0003] The existing ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/20H01Q21/00
CPCH01Q13/20H01Q21/00H01Q21/0006
Inventor 王均宏耿云杰
Owner BEIJING JIAOTONG UNIV
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