Luneberg lens antenna with extremely small curved surface porous structure

Abstract

The utility model belongs to the field of Luneberg lenses, and discloses a Luneberg lens antenna with an extremely small curved surface porous structure, a Luneberg lens is connected with a feed source, and the feed source is arranged on the periphery of the Luneberg lens, so that the volume of the lens antenna is reduced, the feed source can be directly parallel to the bottom surface of the cylindrical Luneberg lens, and the service life of the Luneberg lens antenna is prolonged. Problems existing in the actual installation process are greatly reduced, and multi-beam scanning can be achieved in the same plane by moving the feed source. According to the technology, based on comprehensive analysis of the performance and lightweight design of the Luneberg lens antenna, the optimal porous structure selection is obtained, and theoretical and technical support is provided for design of other types of Luneberg lens antennas.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of dragonberg lens, concretely relates to a kind of dragonberg lens antenna of minimal surface porous structure. BACKGROUND

[0002] With the continuous development and progress of wireless communication technology, satellite positioning technology, radar scanning technology and remote sensing and telemetry technology and other related technologies are also developing rapidly. Among these technologies, the antenna is the core component of wireless communication system and radar system, and its performance directly affects the performance of the whole system. Among them, the dragonberg lens antenna has significant advantages in beam scanning and multi-beam transmission. This antenna can realize the adjustment and scanning of beam direction by changing the position of the feed source without changing the structure and shape of the antenna itself. This way can realize flexible adjustment and scanning of the beam without affecting the gain of the antenna.

[0003] An ideal dragonberg lens requires a material with a continuous gradual change in dielectric constant with lens radius. Due to the lack of natural materials with a continuous gradual change in dielectric constant, the preparation of dragonberg lenses becomes more difficult. The most commonly used method at present is to divide the spherical dragonberg lens into several spherical shells according to the spherical center, but the increase in the number of shells requires more natural materials, and the air domain between different spherical shells will increase the gradient refractive index error. Electromagnetic metamaterial is an artificial electromagnetic material that can obtain electromagnetic properties that natural materials do not have. Its unit structure is much smaller than the working wavelength, which can be used to form an equivalent refractive index, and its equivalent electromagnetic parameters can be adjusted by changing the parameters of the unit structure. This electromagnetic metamaterial technology makes the preparation of dragonberg lenses more simple and convenient.

[0004] The dragonberg lens based on porous structure design realizes the gradient distribution of the refractive index of the dragonberg lens by discretizing the sphere. The spherical dragonberg lens has good performance, but the spherical structure is inconvenient to install in actual use, and a special bracket needs to be customized to realize the fixation with the feed source. SUMMARY

[0005] The utility model aims at overcoming the deficiency that the spherical dragonberg lens has good performance, but the spherical structure is inconvenient to install in actual use, and a special bracket needs to be customized to realize the fixation with the feed source, and provides a kind of dragonberg lens antenna of minimal surface porous structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of dragonberg lens antenna of minimal surface porous structure, including dragonberg lens, and the dragonberg lens is connected with feed source, and feed source is arranged at the periphery of dragonberg lens.

[0008] The further improvement of the utility model lies in that the dragon's breath lens is in layered layout, and the spherical center of the dragon's breath lens extends layer by layer to the outer layer.

[0009] The further improvement of the utility model lies in that the dragon's breath lens is in layered layout, and the spherical center of the dragon's breath lens extends layer by layer to the outer layer.

[0010] The further improvement of the utility model lies in that the dragon's breath lens is in layered layout, and the spherical center of the dragon's breath lens extends layer by layer to the outer layer.

[0011] The further improvement of the utility model lies in that the dragon's breath lens is in layered layout, and the spherical center of the dragon's breath lens extends layer by layer to the outer layer.

[0012] The further improvement of the utility model lies in that the dragon's breath lens is in layered layout, and the spherical center of the dragon's breath lens extends layer by layer to the outer layer.

[0013] The further improvement of the utility model lies in that the dragon's breath lens is in layered layout, and the spherical center of the dragon's breath lens extends layer by layer to the outer layer.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] The utility model discloses a dragon's breath lens connected with a feed source, and the feed source is arranged at the periphery of the dragon's breath lens, which not only reduces the volume of the lens antenna, but also makes the feed source directly parallel to the bottom surface of the columnar dragon's breath lens, greatly reduces the problems existing in the actual installation process, and realizes multi-beam scanning in the same plane by moving the feed source. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is a sectional view of the utility model;

[0018] Wherein, 1, dragon's breath lens; 2, feed source. CONCRETE IMPLEMENTATION

[0019] In order to further understand the content of the utility model, the following will be combined with the drawings and specific embodiments to make a detailed description of the utility model.

[0020] Referring to Figure 1 And Figure 2The application discloses a Luneberg lens antenna with a small curved surface porous structure, which comprises a Luneberg lens 1, and a feed source 2 connected to the Luneberg lens 1 and arranged at the periphery of the Luneberg lens 1.

[0021] The utility model discloses a Luneberg lens ball and the feed source for realizing beam control and scanning ability, the feed source arrangement is in the periphery of Luneberg lens ball, and Luneberg lens ball adopts the layered structure, and through optimizing the structure parameter and the dielectric constant of each layer structure of Luneberg lens, the convergence effect of Luneberg lens ball to the feed source beam is adjusted. The application discloses a Luneberg lens antenna with a small curved surface porous structure, which comprises a Luneberg lens 1, and a feed source 2 connected to the Luneberg lens 1 and arranged at the periphery of the Luneberg lens 1.

[0022] Embodiment:

[0023] When the distance from the feed source aperture plane to the center of the Luneberg lens ball is 20 mm, the gain of the cylindrical Luneberg lens reaches the maximum value.

[0024] The cylindrical Luneburg lens compressed by coordinate transformation has the same ability as the spherical Luneburg lens at 9 GHz, 10 GHz, and 11 GHz, and has good ability to convert spherical electromagnetic waves into planar electromagnetic waves.

[0025] The three-dimensional far-field patterns of the cylindrical Luneburg lens at 9 GHz, 10 GHz, and 11 GHz show that the three-dimensional far-field patterns have obvious beam convergence effect compared with the far-field patterns of the horn feed after adding the cylindrical Luneburg lens, and the directional coefficient of radiation increases with the increase of frequency. The main reason is that the frequency of electromagnetic waves is higher and the wavelength is smaller, so the distance of the beam passing through the ball is more than one wavelength, so the beam convergence also becomes more concentrated.

[0026] The two-dimensional patterns of the compressed cylindrical Luneburg lens at the best focal length and longitudinal focal length at 9 GHz, 10 GHz, and 11 GHz show that the gain values of the I-WP type minimal surface designed Luneburg lens at the three frequencies are 21.2 dBi, 20.6 dBi, and 21.1 dBi, respectively, the H-plane simulation half-power beam width is about 18.9°, 17.9°, and 17.8°, and the E-plane half-power beam width is about 11.7°, 13.4°, and 13.1°. The gain values of the I-WP type multi-hole structure cylindrical Luneburg lens at the three frequencies are not much different, and are about 11 dB higher than the gain value of the feed, and about 2 dB less than the maximum gain value of the spherical Luneburg lens with the same structure design. The half-wave beam width is slightly wider than that of the spherical Luneburg lens, i.e. the beam energy aggregation ability is slightly worse than that of the spherical Luneburg lens, but it can still be used as an equivalent transformation of the spherical Luneburg lens.

[0027] As the value of c gradually increases, the maximum gain value of the I-WP type multi-hole structure cylindrical Luneburg lens gradually decreases, the main beam width gradually widens, but the side lobe of the lens antenna also increases. When the value of c is 10-50 mm, the maximum gain value of the lens antenna is 20.9 dBi, 20.4 dBi, 19.2 dBi, 18.1 dBi, and 16.9 dBi, respectively. When the displacement of the feed position from the center is small, the maximum gain value of the Luneburg lens decreases by about 0.5 dB, and when the displacement of the feed position from the center is large, the maximum gain value decreases by about 1 dB, which is due to the intensified gradient refractive index reflection of the lens away from the center of the lens.

[0028] It should be explained finally: the above examples are only used to illustrate the technical scheme of the utility model and not to limit it, although the utility model has been explained in detail with reference to the above examples, the ordinary skilled in the art should understand that: the specific implementation of the utility model can still be modified or replaced, and any modification or equivalent replacement without departing from the spirit and scope of the utility model should be covered in the protection scope of the claims of the utility model.

Claims

1. A Luneberg lens antenna of a minimal curved surface porous structure, characterized in that, The lens comprises a Luneberg lens (1), the Luneberg lens (1) is connected with a feed source (2), and the feed source (2) is arranged at the periphery of the Luneberg lens (1); The Luneberg lens (1) is arranged in a layered mode, and the spherical center of the Luneberg lens (1) extends layer by layer outward.

2. A dragonfly lens antenna of minimal curved surface porous structure according to claim 1, characterized in that, The Luneberg lens (1) adopts a minimal surface I-WP type multi-hole structure.

3. A dragonfly lens antenna of minimal curved surface porous structure according to claim 1, characterized in that, The porosity of each layer of the Luneberg lens (1) is adjusted by a level set function parameter.

4. A dragonfly lens antenna of minimal curved surface porous structure according to claim 1, characterized in that, The Luneberg lens (1) is in a columnar shape.

5. A dragonfly lens antenna of minimal curved surface porous structure according to claim 1, characterized in that, The feed source (2) adopts a horn antenna.

6. A dragonfly lens antenna of minimal curved surface porous structure according to claim 1, characterized in that, The working frequency band of the feed source (2) is 9GHz to 11GHz.

Images