Ultra wide band dual polarization antenna

A dual-polarized antenna and ultra-wideband technology, applied to antenna unit combinations with different polarization directions, radiating element structures, etc., can solve the problem of excessively high profile of ultra-wideband dual-polarized antennas, and achieve good standing wave characteristics, Effect of low cross polarization and reduced profile height

Active Publication Date: 2018-08-14
SHANGHAI JIAO TONG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the profile of the existing ultra-wideband dual-polarized antenna with a stable radiation pattern is too high, the present invention provides a miniaturized low-profile ultra-wideband dual-polarized antenna

Method used

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specific Embodiment 1

[0053] A miniaturized low-profile dual-polarized ultra-wideband dual-polarized antenna. The overall antenna is composed of two orthogonally placed miniaturized Vivaldi antenna units. The two miniaturized Vivaldi antenna units have basically the same structure and are opened on both sides At the same time, the part near the radiation end is curled at 90°, and the curl length is 60mm; the part near the feed end is folded at 90°, and the folding length is different. The folding length of antenna unit 2 is 30mm. The folded length of unit 1 is 35mm, and the length difference is equal to the height difference when the antennas are placed orthogonally, that is, the distance between the bottom of the two antenna units is 5mm. This height difference has a great influence on the isolation of the two ports in the low frequency band. The radiation ports of the two antenna units are flush, which ensures the consistency of the radiation characteristics of the two ports. The overall height o...

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Abstract

The invention provides a small-sized low-profile ultra wide band dual polarization antenna applied to the technical fields of communication, such as high-resolution radar detection, electronic countermeasures and ultra wide band wireless communication and the like. The overall antenna is combined by two similar Vivaldi-type antenna units in an orthorhombic manner so as to realize dual polarization; the Vivaldi-type antenna units are folded and curved through a meandering technology, so that the overall dimension and profile height are greatly reduced; by virtue of improved design of the feed microstrip line, high standing wave characteristic is achieved in the whole frequency band; and by virtue of optimization of the combined parameters of the antenna units, the two ports of the antenna has high isolation degree in the whole frequency band, so that the final antenna provided by the invention can realize a stable directional diagram and relatively low crossed polarization within quitewide frequency band, and is small in structure, low in profile and can better adapt various application fields.

Description

technical field [0001] The invention relates to the field of microwave and antenna technology, specifically a 3-dimensional ultra-wideband antenna, an ultra-wideband dual-polarized antenna combined by folding and bending technology, which has an orthogonal polarization characteristic of ±45°, and has a good Polarization purity and port isolation. The microstrip line is used to feed the slot line, and the design of the feed microstrip line is improved, so that the antenna can achieve good matching in a wide frequency band. Background technique [0002] Traditional wireless electronic devices, such as radar detection and wireless communication devices, have a single polarization and relatively narrow signal bandwidth. With the continuous development of wireless communication technology, people put forward higher and higher requirements for the working performance of the radio system, such as detection resolution, information transmission speed and channel capacity. Dual-pola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q21/24
CPCH01Q1/36H01Q21/24
Inventor 耿军平刘珏林梁仙灵王堃金荣洪朱卫仁贺冲
Owner SHANGHAI JIAO TONG UNIV
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