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A digitally coded transmissive broadband dielectric-based metasurface antenna and array

An antenna array, transmission type technology, applied in antenna arrays, specific array feeding systems, antennas, etc., can solve the problem of difficult manufacturing process of lens antennas, and achieve customizable loss, high precision, and improved antenna bandwidth. Effect

Active Publication Date: 2022-05-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a digitally coded transmissive broadband dielectric-based metasurface antenna and array for the huge and complex feeding network of the phased array antenna and the difficult manufacturing process of the traditional lens antenna.

Method used

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  • A digitally coded transmissive broadband dielectric-based metasurface antenna and array
  • A digitally coded transmissive broadband dielectric-based metasurface antenna and array
  • A digitally coded transmissive broadband dielectric-based metasurface antenna and array

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Experimental program
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Effect test

Embodiment 1

[0041] like figure 1 As shown, the transmission-type broadband dielectric-based metasurface antenna that can be digitally encoded in this embodiment includes:

[0042] For the upper rectangular dielectric resonator and the lower rectangular dielectric resonator, the dielectric material is 3D printing material ABS with a dielectric constant of 10 and a loss tangent of 0.004, or a 3D printing material of acrylic resin with a dielectric constant of 2.7-4.5 and a loss tangent of 0.0253. The specific size of the rectangular dielectric block can be calculated by the dielectric waveguide method according to the different operating frequencies. In this embodiment, the length and width of the rectangular dielectric block are both set to 5 mm, the height of the rectangular dielectric block is 4 mm, and the operating frequency is 14 GHz. Compared with the metal patch, the dielectric resonator has the characteristics of low Q value, wide bandwidth and small transmission loss, which is ben...

Embodiment 2

[0047] Based on the transmission-type broadband dielectric-based metasurface antenna array provided by the invention, various beam control functions can be realized. First, by numerical calculation, the gradient phase distribution of each antenna unit in the array is determined according to the transmission angle of different electromagnetic waves, and then the digital code "0" of the array is determined according to the gradient phase distribution and the phase shift response of the two different coding state units and the sequence distribution of "1". After determining the 0 / 1 arrangement sequence of the array, establish a unit model corresponding to each point to establish the corresponding encoding state. The incident angle of the horn antenna and the distance from the horn antenna to the transmission-type dielectric-based digitally coded metasurface antenna are set, and the overall simulation model is established. The distance between the antenna elements in the array sh...

Embodiment 3

[0050] Based on the digitally coded transmission-type broadband dielectric-based metasurface antenna array provided by the present invention, the antenna array is set to realize arbitrary beam pointing control in a two-dimensional plane. The sequence of digital codes corresponding to different beam orientations can be found in Figure 10 , where (a) is the coding sequence arrangement of metasurface array with Phi=0°, Theta=190°; (b) is the coding sequence arrangement of metasurface array with Phi=0°, Theta=200°; (c) is Phi=0°, Theta=210° metasurface array coding sequence arrangement; (d) Phi=0°, Theta=220° metasurface array coding sequence arrangement; (e) Phi=0°, Theta =230° metasurface array coding sequence arrangement. Corresponding to different unit digital codes, the transmission-type broadband dielectric-based metasurface antenna array of the present invention has a good control effect on the radiation direction of electromagnetic waves, such as Figure 11 As shown, th...

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Abstract

The invention discloses a digitally coded transmissive broadband dielectric-based metasurface antenna and an array. The antenna includes upper and lower rectangular dielectric resonators and a phase modulation device. The phase modulation device includes two layers of metal floors and two layers of phase shifting circuits. The electromagnetic wave is received by the upper rectangular dielectric resonator, and then coupled to the upper phase-shift circuit through the upper metal floor by means of slot coupling. The upper phase-shift circuit is connected to the lower phase-shift circuit through the metal via hole, and the electromagnetic wave is transmitted to the lower phase-shift circuit. Two different forward paths are set on the lower phase shifting circuit. The two paths have a wave path difference of 0.5 times the wavelength, so that the transmission phase difference is 180°, which are respectively coded as "0" and "1" modes, which affect the electromagnetic characteristics. Binary digital encoding. The invention can control various beams of transmitted electromagnetic waves, realize beam scanning and multi-beam radiation functions, and has great significance for the development of modern wireless communication systems.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a digitally coded transmission-type broadband dielectric-based metasurface antenna. Applied in the field of wireless communication. Background technique [0002] In recent years, wireless communication systems have developed rapidly, and the requirements for bandwidth and gain have become higher and higher. Lens antennas are widely used in radar detection, beam scanning and other fields due to their high gain and directional beam characteristics. Compared with reflector antennas, lens antennas have significant advantages such as high design freedom, no feed source occlusion problem, and controllable beam direction. Traditional lens antennas generally bend metal materials or dielectric materials at a certain angle to achieve electromagnetic wave convergence. This method will cause problems such as complex overall structure of the antenna, excessive weight, high processing cost, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q1/50H01Q3/38H01Q21/00
CPCH01Q1/38H01Q1/50H01Q3/38H01Q21/0006
Inventor 李斌郭珈铭张国祥刘埇
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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