CN-121983773-A - Long Bo lens antenna device based on two-degree-of-freedom adjustment

CN121983773ACN 121983773 ACN121983773 ACN 121983773ACN-121983773-A

Abstract

The invention provides a Long Bo lens antenna device based on double-degree-of-freedom adjustment, which comprises a supporting plate, a feed source antenna and a Long Bo lens array, wherein the supporting plate is provided with a first loading area and a second loading area which are adjacent to each other, the feed source antenna is movably arranged in the first loading area, a radiation opening of the feed source antenna faces the second loading area, and the Long Bo lens array comprises a plurality of Luneberg lens units which are adjustably arranged in the second loading area along the propagation direction of electromagnetic waves. The Long Bo lens antenna device is configured to achieve a first degree of freedom adjustment of a beam width by adjusting a distance between the feed antenna and the Long Bo lens array, a second degree of freedom adjustment of a beam shape by adjusting positions of each of the luneberg lens units in a propagation direction of electromagnetic waves to form a controllable equivalent dielectric constant gradient distribution, and a target beam having predetermined characteristics converted from the electromagnetic waves by a synergistic effect of the first degree of freedom adjustment and the second degree of freedom adjustment.

Inventors

LIU XIAOLONG
WANG ZAN
KONG DEQING
ZHANG JIE
WANG XIAOLAN
JI DUO

Assignees

中国科学院国家天文台

Dates

Publication Date: 20260505
Application Date: 20260121

Claims (10)

1. A Long Bo lens antenna assembly based on dual degree of freedom adjustment, comprising: the support plate is provided with a first loading area and a second loading area which are adjacent to each other; The feed source antenna is movably arranged in the first loading area, a radiation opening of the feed source antenna faces the second loading area, and the radiation opening is used for emitting electromagnetic waves; Long Bo a lens array comprising a plurality of cobs lens units, each of said Long Bo lens units being adjustably mounted within said second loading region along the direction of propagation of electromagnetic waves, said Long Bo lens array being for varying the beam characteristics of said electromagnetic waves; Wherein the Long Bo lens antenna arrangement is configured to: The first degree of freedom adjustment of the beam width is achieved by moving the feed antenna in the first loading area and adjusting the distance between the feed antenna and the Long Bo lens array; Forming controllable equivalent dielectric constant gradient distribution in the Long Bo lens array by adjusting the position of each Long Bo lens unit in the electromagnetic wave propagation direction, so as to realize second degree of freedom adjustment of the beam shape; The electromagnetic wave is converted into a target beam having a predetermined characteristic by a synergistic effect of the first degree-of-freedom adjustment and the second degree-of-freedom adjustment.
2. The Long Bo lens antenna assembly as claimed in claim 1, wherein each Long Bo lens unit is a cylinder, and the second loading area is provided with a plurality of mounting holes arranged in an array, and the cylinder is mounted in the corresponding mounting holes in an axially movable manner; Each Long Bo lens unit is configured to adjust the effective acting length of the electromagnetic wave in each Long Bo lens unit by changing the insertion depth of the cylinder in the mounting hole, thereby forming a controllable equivalent dielectric constant gradient profile in the Long Bo lens array.
3. The Long Bo lens antenna device as claimed in claim 2, wherein the column body includes an adjusting portion, an external thread structure is provided on an outer surface of the adjusting portion, and an internal thread structure matched with the external thread structure is provided on an inner wall of the mounting hole; The adjusting portion is configured to adjust a depth of insertion into the mounting hole by adjusting screwing-in and screwing-out of the male screw structure in the female screw structure.
4. The Long Bo lens antenna unit according to claim 3, wherein the column further includes an operation portion fixedly connected to an end of the adjustment portion and located outside the mounting hole; the cross section of the operation part is polygonal, the diameter of the operation part is smaller than that of the adjustment part, and the operation part is used for driving the adjustment part to rotate in the mounting hole.
5. The Long Bo lens antenna unit as in claim 4, wherein the adjustment portion and the operating portion are integrally formed.
6. The Long Bo lens antenna arrangement as defined in claim 1, wherein the first loading area has a guide channel formed therein directed toward the second loading area, the feed antenna being movably disposed within the guide channel, the guide channel defining a locus of movement of the feed antenna.
7. The Long Bo lens antenna assembly as in claim 6, wherein the guide channel is surrounded by a portion of the support plate to form a semi-enclosed structure.
8. The Long Bo lens antenna arrangement as claimed in claim 6 or 7, wherein the end of the guide channel adjacent to the second loading zone is flared for improving the coupling efficiency of the electromagnetic wave from the feed antenna to the Long Bo lens array.
9. The Long Bo lens antenna unit as in claim 2 wherein the plurality of gabion lens units are arranged in a semicircle in plan view, the center line of the semicircle passing through the feed antenna; Wherein the semicircle includes a plurality of concentric semicircle rings having gradually larger radii, long Bo lens units located on the same concentric semicircle ring are configured to have the same initial insertion depth, and as the radius of the semicircle ring increases, the initial insertion depth of the Long Bo lens unit gradually decreases, thereby forming a distribution in which the equivalent dielectric constant gradually decreases from the center to the edge in the propagation direction of the electromagnetic wave.
10. The Long Bo lens antenna assembly as in claim 2 wherein the plurality of gabion lens units are arranged in two semi-circles of equal radius side by side in top view, the symmetry center line of the two semi-circles passing through the feed antenna; Wherein each of the semicircles includes a plurality of concentric semicircle rings having a radius gradually increasing, long Bo lens units located on the same concentric semicircle ring are configured to have the same initial insertion depth, and the initial insertion depth of Long Bo lens units gradually decreases as the radius of the semicircle ring increases, thereby forming a distribution in which the equivalent dielectric constant gradually decreases from the center to the edge within each semicircle.

Description

Long Bo lens antenna device based on two-degree-of-freedom adjustment Technical Field The present invention relates to the field of antenna technology, and in particular, to a Long Bo lens antenna device with adjustable beam characteristics, and more particularly, to a Long Bo lens antenna device based on a dual-degree-of-freedom adjustment mechanism. Background In the field of radio telescope surface shape measurement, particularly for rectangular truncated paraboloid measurement, beam irradiation with rectangular flat-top distribution is required to be generated so as to match the aperture shape of an antenna, thereby improving irradiation efficiency and reducing edge overflow. However, the conventional Long Bo lens antenna generally adopts a fixed structure design, and the dielectric constant distribution of the conventional Long Bo lens antenna is not adjustable, so that the beam shape is fixed, and it is difficult to generate a required rectangular flat-top beam. Most of the existing adjustable schemes can only control the beam width or the direction, cannot accurately adjust the beam shape at the same time, and are complex in structure and high in cost. Therefore, there is a need for a Long Bo lens antenna device with a simple structure and flexible adjustment, which can precisely generate a target beam with a predetermined characteristic by cooperatively controlling a plurality of adjustment parameters, so as to meet the measurement requirements of special application scenes. Disclosure of Invention In view of the above, the embodiment of the invention provides a Long Bo lens antenna device based on dual-degree-of-freedom adjustment, which comprises a supporting plate, a first loading area and a second loading area, wherein the supporting plate is provided with the adjacent first loading area and the adjacent second loading area; the antenna comprises a feed source antenna, a Long Bo lens array, a Long Bo lens array and a Long Bo lens array, wherein the feed source antenna is movably arranged in a first loading area, a radiation opening of the feed source antenna faces a second loading area and is used for emitting electromagnetic waves, the Long Bo lens array comprises a plurality of Luneberg lens units, each Luneberg lens unit is adjustably arranged in the second loading area along the propagation direction of the electromagnetic waves, the Long Bo lens array is used for changing the beam characteristics of the electromagnetic waves, the Long Bo lens antenna device is configured to achieve first degree of freedom adjustment of the beam width by moving the position of the feed source antenna in the first loading area and adjusting the distance between the feed source antenna and the Long Bo lens array, form controllable equivalent dielectric constant gradient distribution in the Long Bo lens array by adjusting the position of each Luneberg lens unit in the propagation direction of the electromagnetic waves, achieve second degree of freedom adjustment of the beam shape, and convert the electromagnetic waves into target beams with preset characteristics through the synergistic effect of the first degree of adjustment and the second degree of freedom adjustment. According to the embodiment of the invention, each Lunbo lens unit is a cylinder, a plurality of mounting holes which are arranged in an array are arranged on the second loading area, the cylinder can be axially movably mounted in the corresponding mounting hole, and each Lunbo lens unit is configured to adjust the effective acting length of electromagnetic waves in each Lunbo lens unit by changing the insertion depth of the cylinder in the mounting hole, so that controllable equivalent dielectric constant gradient distribution is formed in the Long Bo lens array. According to an embodiment of the invention, the cylinder comprises an adjusting part, an external thread structure is arranged on the outer surface of the adjusting part, an internal thread structure matched with the external thread structure is arranged on the inner wall of the mounting hole, and the adjusting part is configured to adjust the depth of insertion into the mounting hole by adjusting the screwing-in and screwing-out of the external thread structure in the internal thread structure. According to the embodiment of the invention, the column body further comprises an operation part, the operation part is fixedly connected to the end part of the adjusting part and is positioned outside the mounting hole, the cross section of the operation part is polygonal, the diameter of the operation part is smaller than that of the adjusting part, and the operation part is used for driving the adjusting part to rotate in the mounting hole. According to an embodiment of the present invention, the adjusting portion and the operating portion are of an integrally formed structure. According to an embodiment of the invention, a guide channel pointing to the second loading area is formed on th