Coaxial crossed vibrator array communication antenna and design method thereof

Abstract

The invention relates to a coaxial crossed vibrator array communication antenna which comprises a base, a metal inner core, a medium inner core, a metal housing, a metal vibrator, an N-type socket and a medium sleeve tube. According to the antenna, half-wave vibrators with choke sleeves are fed with a periodical annular gap in an outer conductor of a coaxial line, and the choke sleeves not only are vibrator arms but also have an inhibition effect on current on the outer wall of the coaxial line; a medium is loaded between the inner and outer conductors of the coaxial line to guarantee that array elements are same in current, a standing wave curve is relatively small, and directional diagram characteristics are suitable for communication systems; the choke sleeve vibrator structure repeatedly appears in the axial direction to form an array, thereby increasing antenna gain; each pair of half-wave vibrators appear on the metal choke sleeves in a crossed manner, and the included angle between every pair of upper and lower adjacent vibrators is 90 degrees, so that all-direction performance of the antenna is ensured. The coaxial crossed vibrator array antenna has the characteristics of high gain, good all-direction performance and the like, and is suitable for various communication systems with all-direction radiation requirements, such as ADS_B communication systems, AIS communication systems and vehicle-mounted platforms.

Description

technical field [0001] The invention relates to a coaxial crossed dipole array communication antenna. The array antenna has a narrow beam in the vertical plane and an omnidirectional radiation performance in the horizontal plane. In a communication system that requires omnidirectional radiation. Background technique [0002] In the communication fields such as mobile communication base stations and vehicle-mounted stations, in order to realize the omni-directional coverage of signals, omnidirectional antennas should be used. In order to achieve a certain coverage, the antenna is required to have a higher gain. There are usually two ways to realize omnidirectional high-gain antennas: parallel feed and series feed. The feed network of the parallel feed mode is complex and difficult to realize in engineering, so the series feed mode is widely used. [0003] In 1989, Judasz. T. J et al. proposed a series-fed high-gain omnidirectional antenna in the article "Improved Theoretic...

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Problems solved by technology

[0006] The purpose of the present invention is to design a coaxial series-fed dipole antenna array with high gain, good omnidirectionality and simple structure for the problems of low gain and poor omnidirectionality of the azimuth plane of the series-fed antenna.

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