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Planar phased-array antenna capable of two-dimensional scanning at wide angle

A technology of antenna unit and wide-beam antenna, which is applied in the direction of antenna, antenna array, and antenna array powered separately, and can solve the problems of few reports and expansion

Inactive Publication Date: 2016-05-04
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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  • Planar phased-array antenna capable of two-dimensional scanning at wide angle
  • Planar phased-array antenna capable of two-dimensional scanning at wide angle
  • Planar phased-array antenna capable of two-dimensional scanning at wide angle

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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] like 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 is t...

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Abstract

The invention discloses a planar phased-array antenna capable of two-dimensional scanning at a wide angle, belonging to the technical field of an antenna. The phase-array antenna unit comprises a dielectric substrate, a radiating patch, a microstrip feed line and a grounding plate, wherein the radiating patch and the microstrip feed line are arranged on the front surface of the substrate, and the grounding plate is arranged on the back surface of the substrate. With a grooving design on the radiating patch, a placing space is provided for a feed network, and the size of the antenna is also reduced; with a coaxial back feeding mode, a signal is divided into two paths to supply equivalent-amplitude same-phase feed to the radiating patch, so that a TM11 mode of the antenna is simulated, the radiation pattern of the antenna has the characteristic of wide beam, and the phased-array antenna has the capability of scanning at the wide angle; meanwhile, in order to achieve a favorable matching effect, the feed network inside the radiating patch is designed in a gradually-changing microstrip mode; and finally, the antenna units are arranged at equal intervals to form an area array structure, the beam coverage angles of the units are relatively large, and the two-dimensional wide-angle beam scanning can be achieved after the units are reasonably arranged.

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 Applications(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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