A Two-Dimensional Large-Angle Scanning Planar Phased Array Antenna

An antenna unit, wide-beam antenna technology, applied in directions such as antennas, antenna arrays, and individually powered antenna arrays, and can solve problems such as few reported expansions

Inactive Publication Date: 2018-06-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, most reports only realize one-dimensional wide-angle scanning, and few reports extend to two-dimensional wide-angle scanning

Method used

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  • A Two-Dimensional Large-Angle Scanning Planar Phased Array Antenna
  • A Two-Dimensional Large-Angle Scanning Planar Phased Array Antenna
  • A Two-Dimensional Large-Angle Scanning Planar Phased Array Antenna

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] The working center frequency of the phased array antenna is 5.8GHz, and the structure of the phased array antenna unit is as follows: figure 1 (a) and (b), including a dielectric substrate 2 , a radiation patch 1 , a microstrip feeder 5 , a metal ground plate 3 with the same area as the dielectric board, and a coaxial feed port 4 .

[0024] Such as figure 1 As shown in (a), the radiation patch is a square patch with a groove in the center, the size of which is wo=17.2mm, and ws=5.2mm. The dielectric substrate is made of FR4 material with a dielectric constant of 4.4 and a thickness of 1mm, and its side length w=50mm. The metal floor and the dielectric board are bonded and have the same size. The microstrip feeder 5 is a centrally symmetrical gradual microstrip feeder, which is set in the groove of the radiation patch, and its center i...

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Abstract

The invention discloses a two-dimensional large-angle scanning planar phased array antenna, which belongs to the technical field of antennas. The phased array antenna unit includes a dielectric substrate, a radiation patch and a microstrip feeder arranged on the front of the substrate, and a ground plate arranged on the back of the substrate. In the present invention, the radiation patch is slotted, which not only provides a place for the feeding network, but also reduces the size of the antenna; adopts a coaxial backfeed method, and divides the signal into two channels to perform equal amplitude and same phase on the radiation patch. Feed, so as to excite the TM11 mode of the antenna, so that the radiation pattern of the antenna has the characteristics of a wide beam, so that the phased array antenna has the ability to scan at a large angle; at the same time, in order to achieve a good matching effect, inside the radiation patch The feed network is designed in the form of tapered microstrip lines. Finally, the antenna units are arranged at equal intervals to form a planar array structure. Since the beam coverage angle of the units themselves is relatively large, two-dimensional large-angle beam scanning can be realized after arranging them reasonably.

Description

technical field [0001] The invention belongs to the technical field of antennas, in particular to a novel two-dimensional large-angle scanning planar phased array antenna based on mode theory. Background technique [0002] Phased array antennas are a product of the development of radar systems. The traditional planar phased array antenna changes the beam direction of the pattern by electronically controlling the phase of the array element, but research shows that the scanning range of this traditional phased array antenna is only limited to the front normal -45°~+45° . The narrow scanning range greatly limits the application field and development space of phased arrays. Therefore, phased array radars with large-angle scanning capabilities have attracted more and more attention and become an important research topic in the field of antennas. [0003] The document "Research on Reconfigurable Antennas with Millimeter Wave Patterns and Its Phased Array" (published journal: Pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q21/06
CPCH01Q1/38H01Q1/50H01Q21/065
Inventor 丁霄裴赢洲邵维王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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