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

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 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 capability, strong directivity, and simple feeding structure. However, the radiation efficiency of the general leaky wave antenna 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, one basic way is to increase the antenna length, however, for a typical leakage constant, to achieve 90% radiation efficiency, the antenna needs to be as long as 8-10 wavelengths. Such dimensions are impractical in most microwave wireless systems. [0003] The existing ways...

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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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