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Broadband siw slot antenna based on 77ghz balanced symmetrical feed

A slot array antenna, symmetrical technology, applied in the field of slot antenna and millimeter wave vehicle radar, can solve the problem that the working band of the millimeter wave vehicle radar antenna cannot be applied, and achieves overcoming the asymmetry of power distribution, improving radiation performance, and reducing reflection. The effect of coefficients

Active Publication Date: 2021-09-03
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this antenna is only suitable for X-band communication systems, and cannot be used in the working band of millimeter-wave vehicle radar antennas.

Method used

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  • Broadband siw slot antenna based on 77ghz balanced symmetrical feed
  • Broadband siw slot antenna based on 77ghz balanced symmetrical feed
  • Broadband siw slot antenna based on 77ghz balanced symmetrical feed

Examples

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment and the technical scheme of the present invention is described in further detail:

[0028] see figure 1 with figure 2 , the antenna in this example includes: an area array A and a feeding structure 2 . The area array A is composed of four rows of SIW slot line arrays 1 cascaded, and adjacent line arrays share a row of metal vias 15 . The feed structure 2 is mirror-symmetrically distributed about the central axis OO', is perpendicular to the central axis OO', and connects to both sides of the surface array A.

[0029] see image 3 , each row of SIW slot line array 1 includes a dielectric substrate 12 , an upper metal patch 13 , a lower metal patch 14 , a plurality of metal through holes 15 and radiation slits 16 , and the upper metal patch 13 is attached to the upper surface of the dielectric substrate 12 , the lower metal patch 14 is attached to the lower surface of the dielectric substrate 12, ...

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Abstract

The invention proposes a broadband SIW slot antenna based on 77GHz balanced symmetrical feeding, which mainly solves the problem that the existing millimeter wave vehicle radar antenna cannot meet the high gain, low sidelobe and beam stability in the 79-81GHz frequency band. It includes: a surface array A and a feed structure (2) connected to it, the surface array is composed of multiple rows of SIW slotted linear arrays (1), each row of linear arrays includes a dielectric substrate (12) and is located on and below the substrate The upper metal patch (13, 14) on the surface, the dielectric substrate runs through a plurality of metal through holes (15) connected to the upper and lower patches, and a plurality of radiation slits (16) are etched on the upper metal patch; The electrical structure is mirror-symmetrical about the central axis OO' and is perpendicular to the central axis. It consists of cascaded SIW-T type power splitters, waveguide turning structures and alternating phase power splitters. The invention has wide frequency band, high gain, low sidelobe and stable beam, and can be used in the field of millimeter wave vehicle radar antenna.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a slot antenna which can be used for millimeter wave vehicle radar. Background technique [0002] The application of millimeter-wave radar is developing rapidly, especially in the fields of automotive radar, security inspection and security protection. Millimeter wave automotive radar contains two frequency bands of 24GHz and 77GHz, of which the 77GHz frequency band is specifically divided into 76-77GHz and 77-81GHz. Because the 77GHz millimeter wave automotive radar antenna has the advantages of small size and high resolution, it has become a current research hotspot [0003] At present, the millimeter-wave radar antenna technology in the 76-77GHz frequency band is relatively mature, and it can achieve good results by using microstrip arrays and waveguide slot antennas. However, for millimeter-wave radar antennas in the 77-81GHz frequency band, the widening of the working fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/06H01Q1/38H01Q1/50H01Q1/52H01Q9/04H01Q13/10H01Q21/00
CPCH01Q1/38H01Q1/50H01Q1/526H01Q9/0407H01Q13/106H01Q21/00H01Q21/0006H01Q21/065
Inventor 苏涛侯锐丁一凡史敏
Owner XIDIAN UNIV
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