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Electromagnetic-bandgap-structure-based large-unit interval wide-angle scanning phased array antenna

An electromagnetic bandgap structure and phased array antenna technology, applied in the field of radar technology, can solve the problems of large unit size and damaged working bandwidth, achieve good broadband, easy processing and manufacturing, and eliminate scanning blind spots

Active Publication Date: 2018-06-08
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the large unit size will cause scanning blind spots when scanning the E surface, which will damage the working bandwidth for large-angle scanning.

Method used

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  • Electromagnetic-bandgap-structure-based large-unit interval wide-angle scanning phased array antenna

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Embodiment 1

[0024] The large element spacing wide-angle scanning phased array antenna based on the electromagnetic bandgap structure of this embodiment adopts a 13×5 planar array form, and the designed array works at 7-13 GHz. Such as figure 2 The array units shown are arranged in a triangular grid, and the size of the array element is 14.6mm×13mm, which is larger than half the wavelength of the high-frequency end operating frequency. Below is a metal floor 1 with a rectangular connection groove 6, the groove is 3.5mm deep and 6mm wide, and there is no medium filling inside the groove. The middle dielectric plate 4 has a thickness of 0.5 mm and a dielectric constant of 2.2, and is bonded to the metal floor 1 , with a microstrip feeder 5 printed on its upper surface. One end of the coaxial core 7 is connected to the SMA connector, and the other end passes through the metal floor 1 and the middle dielectric board 4 to connect to the feeding point of the microstrip feeder 5, and the other e...

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Abstract

The invention, which belongs to the technical field of the radar and wireless communication, discloses an electromagnetic-bandgap-structure-based large-unit interval wide-angle scanning phased array antenna. Antenna units are distributed in a triangular grid manner. An upper dielectric plate, an intermediate dielectric plate, and a lower metal floor are arranged. The intermediate dielectric platewith the upper surface printed with a micro-strip feeder line is in contact with the metal floor having the upper surface with a connection groove. A coaxial line inner core is connected with a feed point of the micro-strip feeder line; the other end of the micro-strip feeder line is arranged above the connection groove to carry out coupled feeding. A metal strip line is printed on the upper surface of the upper dielectric plate. Besides, an electromagnetic bandgap structure for suppressing surface waves is arranged between the upper dielectric plate and the metal floor. On the basis of the electromagnetic bandgap structure, a scanning blind point is eliminated effectively by means of suppressing surface wave propagation, so that the wide angle and wideband characteristics are realized. The phased array antenna has advantages of large unit dimension and simple structural mode; and the manufacturing cost of the large phased array antenna in actual application can be reduced substantially.

Description

technical field [0001] The invention belongs to the field of radar technology and wireless communication technology, and specifically relates to a phased array antenna with large unit spacing and wide-angle scanning based on an electromagnetic bandgap structure, in particular to wide-band and wide-angle scanning, and is suitable for microwave, millimeter wave and other radars and communications system. Background technique [0002] Phased array antennas have been widely used in military and commercial fields because of their fast beam scanning capabilities and no shortcomings such as time delay and motion inertia of traditional mechanical beam scanning systems. In the past few decades, with the demand for multifunctional systems on military airborne platforms, the research on broadband and wide-angle phased array antennas has also received extensive attention. In the design process of traditional rectangular grid phased array antennas, in order to prevent grating lobes from...

Claims

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Application Information

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IPC IPC(8): H01Q9/04H01Q1/50H01Q1/48
CPCH01Q1/48H01Q1/50H01Q9/0457
Inventor 屈世伟邹文慢王亚茹杨仕文胡俊
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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