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Triple-band antenna with co-feed balun structure

A technology of feeding balun and electric balun, which is applied in the field of tri-band antenna, can solve the problems of affecting the electrical performance index of the antenna, the reduction of the axial ratio characteristic of the antenna, the inconvenience of the antenna structure design and the star layout, etc., so as to improve the resistance to the mechanical environment , Simple structure design, realize the effect of miniaturization design

Active Publication Date: 2018-02-09
SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Therefore, when the vibrator antenna works in a three-frequency circularly polarized radiation mode, three groups of 12 feeder balun structures are required, which will bring great inconvenience to the antenna structure design and star layout, and will result in a gap between the three frequencies. The mutual coupling phenomenon is serious, which reduces the axial ratio of the antenna and affects the electrical performance index of the antenna

Method used

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  • Triple-band antenna with co-feed balun structure
  • Triple-band antenna with co-feed balun structure
  • Triple-band antenna with co-feed balun structure

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] combine figure 1 , Figure 2a to Figure 2c As shown, a tri-band antenna with a co-feed balun structure includes L, UHF, and VHF frequency band radiating elements 9 , L, UHF, and VHF frequency band feed baluns, a feed connecting piece 2 and an antenna base 1 .

[0028] The L-band feed balun includes 4 L-band outer conductors 4, of which 2 L-band outer conductors 4 are equipped with L-band inner conductors, which are used as hard coaxial inner and outer conductors to feed the balun structure, and the other two L-band conductors ensure The symmetrical L-band radiation oscillators 5 are on the same height; the structure of the UHF-band feed balun and the VHF-band feed balun is analogous to the structure of the L-band feed balun.

[0029] The fo...

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Abstract

The invention discloses a triple-band antenna with a co-feed balun structure. The triple-band antenna comprises an antenna radiation vibrator, an external conductor, an internal conductor, a feed connecting piece and an antenna base. The triple-band antenna works by adopting a UHF frequency band and a VHF frequency band through the co-feed balun structure; the antenna feed mode is simplified, so that the problem of axial ratio difference caused by feed balun cross coupling of the UHF frequency band and the VHF frequency can be solved; by virtue of downward bending of the tail end and loading,the miniaturization of the antenna is realized; and in addition, the wave beam angle and gain of the antenna are not changed.

Description

technical field [0001] The invention belongs to the technical field of ionospheric detection, in particular to a tri-frequency antenna with a common-feed balun structure. Background technique [0002] In the field of symmetrical dipoles to realize antenna circularly polarized radiation, the traditional feeding method is that a pair of symmetrical vibrators requires 4 feeding balun structures, of which 2 are used as hard coaxial inner and outer conductors to feed the balun structure, and the other two ensure symmetry The vibrator is at the same height, and at the same time, it is guaranteed to maintain a quarter wavelength with the short-circuit ground loop, so as to realize the unbalanced-balanced conversion design. [0003] Therefore, when the vibrator antenna works in a three-frequency circularly polarized radiation mode, three groups of 12 feeder balun structures are required, which will bring great inconvenience to the antenna structure design and star layout, and will r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q5/20H01Q5/50H01Q1/50H01Q1/36
CPCH01Q1/36H01Q1/50H01Q5/20H01Q5/50
Inventor 张宇环刘伟栋陈银平王会华闵康磊韩伟强
Owner SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
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