Antenna measuring device and coupling structure having the same

Abstract

The present invention discloses an antenna measuring device and a coupling structure with the same, the antenna measuring device comprises: an antenna assembly, the antenna assembly comprises an off-axis antenna and an antenna flange, the off-axis antenna is fixed through the antenna flange and extends into the beam tube of a superconducting resonant cavity; a dial, the dial is arranged on the side of the antenna flange away from the beam tube, and the dial surrounds the circumference of the off-axis antenna, and a scale for displaying the rotation angle is arranged on the dial in the angular direction; a fixing seat, the fixing seat is fixedly connected to the dial, and the antenna flange is rotatably arranged in the fixing seat. The present invention can realize the microwave parameter measurement of a large number of off-axis antennas with arbitrary angle adjustment without disassembly, thereby meeting the evaluation of the asymmetry of the field distribution inside the superconducting resonant cavity, especially the evaluation of the asymmetric field distribution of the polarization degenerate mode in the high-order mode, and has the characteristics of simple structure, easy reading, and easy operation, and is convenient for expanding the driving mechanism to realize automatic control and rotation adjustment.

Description

Technical Field

[0001] The present invention relates to the field of microwave technology, and in particular to an antenna measuring device and a coupling structure having the same. Background Art

[0002] The field distribution of a superconducting resonant cavity with a rotationally symmetric structure also has rotational symmetry under ideal conditions. However, factors such as actual processing conditions and mechanical deformation will make the superconducting resonant cavity a non-ideal rotationally symmetric cavity structure, resulting in the field distribution inside the superconducting resonant cavity not having the characteristics of rotational symmetry.

[0003] In order to measure the asymmetry of the field distribution inside the superconducting resonant cavity, an off-axis antenna is generally used in the beam tube of the superconducting resonant cavity to measure its microwave characteristics along the angular rotation to achieve the asymmetry of the measured field distribution. Among them, the beam tube is connected to the cavity flange, and the off-axis antenna is connected to the antenna flange. Both the cavity flange and the antenna flange adopt the standard flange structure commonly seen on the market, which has the following defects: First, the number of mounting holes in the standard flange along the angular direction is fixed, and the number of measurement points is relatively small; second, the angular position of the mounting holes of the standard flange along the angular direction is fixed, and arbitrary angle adjustment and measurement cannot be achieved; third, the angle adjustment during the measurement process requires repeated disassembly and assembly of the flange, which is cumbersome, time-consuming and labor-intensive.

[0004] In summary, the above measurement method can only measure a small amount of microwave parameters at a fixed angle by rotating in the angular direction, and cannot realize the measurement of a large number of microwave parameters with arbitrary angle adjustment. It cannot meet the evaluation of the asymmetry of the field distribution inside the superconducting resonant cavity, especially the evaluation of the asymmetric field distribution of polarization degenerate modes in high-order modes. Summary of the invention

[0005] In order to solve the above-mentioned defects in the prior art, the purpose of the present invention is to provide an antenna measurement device and a coupling structure, so as to realize the microwave parameter measurement of a large number of off-axis antennas with arbitrary angle adjustment without disassembly, thereby satisfying the evaluation of the asymmetry of the field distribution inside the superconducting resonant cavity, especially the evaluation of the asymmetric field distribution of polarization degenerate modes in high-order modes.

[0006] A first aspect of the present invention provides an antenna measurement device, comprising:

[0007] An antenna assembly, the antenna assembly comprising an off-axis antenna and an antenna flange, the off-axis antenna being fixed through the antenna flange and extending into a beam tube of the superconducting resonant cavity;

[0008] A dial, which is arranged on a side of the antenna flange away from the beam tube, and surrounds the circumference of the off-axis antenna, and is provided with a scale for displaying the rotation angle along the angular direction on the dial;

[0009] The fixing seat is fixedly connected to the scale plate, and the antenna flange is rotatably arranged in the fixing seat.

[0010] As a preferred embodiment, in the first aspect of the present invention, the dial and the fixing seat are correspondingly provided with at least two groups of fixing holes, and each group of fixing holes is fixedly connected by a fixing member.

[0011] As a preferred embodiment, in the first aspect of the present invention, the fixing seat includes a side portion surrounding the circumference of the antenna flange, the side portion is fixedly connected to the dial, and one end of the side portion away from the dial extends radially inward to form a bottom, and the bottom is arranged on a side of the antenna flange close to the beam tube.

[0012] As a preferred embodiment, in the first aspect of the present invention, a rotating disk is provided on the side of the antenna flange away from the beam tube, the rotating disk is fixedly connected to the antenna flange and the two can rotate synchronously, and the rotating disk surrounds the circumference of the off-axis antenna.

[0013] As a preferred embodiment, in the first aspect of the present invention, a rotating mechanism is provided at one end of the rotating disk away from the beam tube, and the rotating mechanism drives the rotating disk and the antenna flange to rotate synchronously, and the rotating mechanism is driven manually or connected to a driving mechanism.

[0014] As a preferred implementation, in the first aspect of the present invention, at least two groups of connection holes are correspondingly provided on the antenna flange and the rotating disk, and each group of connection holes is fixedly connected by a connecting member.

[0015] As a preferred embodiment, in the first aspect of the present invention, the rotating disk and the graduated disk are both annular structures, the graduated disk surrounds the circumference of the rotating disk, and a group of graduated lines are symmetrically arranged on the rotating disk.

[0016] The second aspect of the present invention provides a coupling structure with an antenna measuring device, comprising: a superconducting resonant cavity, a beam tube and the above-mentioned antenna measuring device, wherein the beam tube is arranged at the axial end of the superconducting resonant cavity, and one end of the off-axis antenna is fixed through the antenna flange and extends into the beam tube.

[0017] As a preferred embodiment, in the second aspect of the present invention, one end of the beam tube away from the superconducting resonant cavity is fixedly connected to a beam tube flange, the beam tube flange is fixed in a fixing seat, and one end of the off-axis antenna is fixed through the antenna flange, rotatably passes through the beam tube flange and extends into the beam tube.

[0018] As a preferred embodiment, in the second aspect of the present invention, the inner diameter of the fixing seat is adapted to the beam tube flange, and the inner diameter of the beam tube flange corresponding to the radial direction of the fixing seat is slightly larger than the outer diameter of the beam tube flange, and the inner diameter of the beam tube corresponding to the radial direction of the fixing seat is larger than the outer diameter of the beam tube and smaller than the outer diameter of the beam tube flange;

[0019] The axial dimension of the inner cavity of the fixing seat is slightly smaller than the sum of the thickness of the beam tube flange and the thickness of the antenna flange.

[0020] As a preferred embodiment, in the second aspect of the present invention, at least two groups of mounting holes are correspondingly formed in the fixing seat and the bundle tube flange, and each group of mounting holes is fixedly connected by a mounting member.

[0021] As a preferred embodiment, in the second aspect of the present invention, the fixing seat includes a first fixing seat and a second fixing seat, and corresponding ends of the first fixing seat and the second fixing seat are spliced ​​to form an inner cavity for accommodating the antenna flange and the beam tube flange.

[0022] The antenna measurement device and the coupling structure provided by the present invention have the following technical effects:

[0023] The antenna flange is rotatably arranged in the fixing seat, and the rotation of the antenna flange can drive the off-axis antenna to rotate synchronously, and through the limit of the fixing seat, the antenna assembly can realize a large number of rotations and any angles, and can be accurately read through the dial. In this way, the present invention can realize the microwave parameter measurement of the off-axis antenna with a large number of angles without disassembly, thereby meeting the evaluation of the asymmetry of the field distribution inside the superconducting resonant cavity, especially the evaluation of the asymmetric field distribution of the polarization degenerate mode in the high-order mode, with the characteristics of simple structure, easy reading, easy operation, and convenient expansion of the driving mechanism to realize automatic control of rotation adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a coupling structure with an antenna measuring device of the present invention;

[0025] Figure 2 It is a main structural schematic diagram of the coupling structure of the present invention;

[0026] Figure 3 It is an exploded view of the coupling structure with the antenna measurement device of the present invention.

[0027] Reference numerals:

[0028] 1. Antenna assembly; 11. Off-axis antenna; 12. Antenna flange; 2. Superconducting resonant cavity; 3. Beam tube; 4. Scale plate; 5. Fixing seat; 51. Side; 52. Bottom; 53. First fixing seat; 54. Second fixing seat; 61. Fixing hole; 62. Fixing piece; 7. Rotating disk; 71. Scale line; 81. Connecting hole; 82. Connecting piece; 9. Beam tube flange; 101. Mounting hole; 102. Mounting piece. DETAILED DESCRIPTION

[0029] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See also Figure 1 The present invention provides an antenna measuring device for measuring the asymmetry of the field distribution in a superconducting resonant cavity 2, which includes an antenna assembly 1, a dial 4 and a fixing seat 5. The antenna assembly 1 includes an off-axis antenna 11 and an antenna flange 12. The off-axis antenna 11 is fixed through the antenna flange 12 and extends into the beam tube 3 of the superconducting resonant cavity 2. The dial 4 is arranged on a side of the antenna flange 12 away from the beam tube 3, and the dial 4 surrounds the circumference of the off-axis antenna 11. The dial 4 is provided with a scale for displaying the rotation angle in the angular direction. The fixing seat 5 is fixedly connected to the dial 4, and the antenna flange 12 is rotatably arranged in the fixing seat 5.

[0033] The central axis of the antenna flange 12, the superconducting resonant cavity 2 and the beam tube 3 are in a straight line, and the off-axis antenna 11 is set off-axis, that is, the off-axis antenna 11 can be set at any position between the central axis of the beam tube 3 and the peripheral edge of the beam tube 3, of course excluding the two end points of the central axis and the edge. The off-axis antenna 11 and the antenna flange 12 are fixedly arranged, and the antenna flange 12 is rotatably arranged in the fixing seat 5. The rotation of the antenna flange 12 can drive the off-axis antenna 11 to rotate synchronously, and through the limit of the fixing seat 5, the antenna assembly 1 can realize a large number of rotations and any angles, and can be accurately read through the dial 4.

[0034] In this way, the present invention can realize the microwave parameter measurement of the off-axis antenna 11 in large quantities and at any angle without disassembly, thereby meeting the evaluation of the asymmetry of the field distribution inside the superconducting resonant cavity 2, especially the evaluation of the asymmetric field distribution of the polarization degenerate mode in the high-order mode. It has the characteristics of simple structure, easy reading and easy operation, and is convenient for expanding the driving mechanism to realize automatic control of rotation adjustment.

[0035] It should be noted that the antenna flange 12 is rotatably disposed in the fixing seat 5 , and the antenna flange 2 can be rotated by manual drive, or can be connected to a driving mechanism to achieve rotation.

[0036] Combination Figure 3 , the dial 4 and the fixing seat 5 are provided with at least two groups of fixing holes 61 correspondingly, and each group of fixing holes 61 is fixedly connected by a fixing member 62. A group of fixing holes 61 means that the dial 4 and the fixing seat 5 are provided with fixing holes 61 correspondingly, so as to facilitate the fixing member 62 to pass through the two corresponding fixing holes 61, thereby realizing the connection between the dial 4 and the fixing seat 5. There can be at least two groups of fixing holes 61, which can ensure the stability of the connection between the dial 4 and the fixing seat 5 and avoid the occurrence of relative movement caused by one group of connection structures. The actual number of groups of fixing holes 61 can be set according to production needs, as long as a stable connection can be guaranteed.

[0037] The fixing member 61 is generally a bolt, which is a common fastener, cheap and easy to obtain. In addition, by adjusting the tightness of the connection between the dial 4 and the fixing seat 5, it is ensured that the antenna assembly 1 rotates smoothly and will not fall out of the fixing seat 5.

[0038] The fixing seat 5 includes a side portion 51 surrounding the circumference of the antenna flange 12, the side portion 51 is fixedly connected to the scale plate 4, and one end of the side portion 51 away from the scale plate 4 extends radially inward to form a bottom portion 52, and the bottom portion 52 is arranged on a side of the antenna flange 12 close to the beam tube 3. The combination of the side portion 51 and the bottom portion 52, combined with the connection between the scale plate 4 and the fixing seat 5, can realize that the antenna flange 12 is rotatably arranged in the fixing seat 5, which can ensure smooth rotation and prevent it from falling out of the fixing seat 5.

[0039] On the basis of the above structure, a rotating disk 7 is provided on the side of the antenna flange 12 away from the beam tube 3. The rotating disk 7 is fixedly connected to the antenna flange 12 and the two can rotate synchronously. The rotating disk 7 surrounds the circumference of the off-axis antenna 11. The setting of the rotating disk 7 has the characteristic of smooth rotation. By rotating the rotating disk 7, the synchronous rotation of the antenna assembly 1 can be achieved, which is conducive to improving the convenience of rotation.

[0040] A rotating mechanism is provided at one end of the rotating disk 7 away from the beam tube 3, and the rotating mechanism drives the rotating disk 7 and the antenna flange 12 to rotate synchronously, and the rotating mechanism is driven manually or connected to a driving mechanism. The rotating mechanism can be a simple rotating shaft or other rotating parts, which can be manually driven to rotate, or connected to a driving mechanism to realize automatic rotation by control of a control mechanism.

[0041] The antenna flange 12 and the rotating disk 7 are provided with at least two groups of connection holes 81, and each group of connection holes 81 is fixedly connected by a connector 82. A group of connection holes 81 means that the antenna flange 12 and the rotating disk 7 are provided with connection holes 81, so as to facilitate the connection member 82 to pass through the two corresponding connection holes 81, thereby realizing the connection between the antenna flange 12 and the rotating disk 7. There are at least two groups of connection holes 81, which can ensure the stability of the connection between the antenna flange 12 and the rotating disk 7 and avoid the occurrence of relative movement caused by one group of connection structures. The actual number of groups of connection holes 81 can be set according to production needs, for example, it can be directly the number of holes of the antenna flange 12.

[0042] The connecting member 82 may be a connecting rod, a pin or other structural member, which is cheap and easy to obtain and can ensure that the antenna flange 12 and the rotating disk 7 are firmly connected.

[0043] The rotating disk 7 and the scale plate 4 are both annular structures, the scale plate 4 surrounds the circumference of the rotating disk 7, and a group of engraved lines 71 are symmetrically arranged on the rotating disk 7. The annular structure can ensure the precise correspondence of the rotation angle, and the setting of the engraved lines 71 is conducive to accurate reading.

[0044] In addition to the above antenna measurement device, the present invention also provides a coupling structure having an antenna measurement device, see Figure 1 and Figure 2 It includes: a superconducting resonant cavity 2, a beam tube 3 and the above-mentioned antenna measuring device, the beam tube 3 is arranged at the axial end of the superconducting resonant cavity 2, and one end of the off-axis antenna 11 is fixed through the antenna flange 12 and extends into the beam tube 3.

[0045] The antenna measuring device is applied to the coupling structure, and the rotating structure of the dial 4, the fixing seat 5, and the rotating disk 7 can be used to realize the microwave parameter measurement of the off-axis antenna 11 with a large amount of adjustment and at any angle without disassembly, thereby meeting the evaluation of the asymmetry of the field distribution inside the superconducting resonant cavity 2, especially the evaluation of the asymmetric field distribution of the polarization degenerate mode in the high-order mode. It has the characteristics of simple structure, easy reading, and easy operation, and is convenient for expanding the driving mechanism to realize automatic control of rotation adjustment.

[0046] Combination Figure 3 The end of the beam tube 3 away from the superconducting resonant cavity 2 is fixedly connected with a beam tube flange 9, which is fixed in the fixing seat 5. One end of the off-axis antenna 11 is fixed through the antenna flange 12 in turn, and can be rotated through the beam tube flange 11 and extend into the beam tube 3. The fixing seat 5 can not only realize the rotation of the antenna flange 12 therein, but also ensure the stable fixation of the beam tube flange 9, so as to realize a large number of and arbitrary angle adjustments of the off-axis antenna 11 relative to the beam tube 3.

[0047] At least two groups of mounting holes 101 are correspondingly provided on the fixing seat 5 and the beam tube flange 9, and each group of mounting holes 101 is fixedly connected by a mounting member 102. A group of mounting holes 101 means that both the fixing seat 5 and the beam tube flange 9 are correspondingly provided with mounting holes 101, so as to facilitate the mounting member 102 to pass through the two corresponding mounting holes 101, thereby realizing the connection between the fixing seat 5 and the beam tube flange 9. At least two groups of mounting holes 101 are provided, which can ensure the stability of the connection between the fixing seat 5 and the beam tube flange 9 and avoid the occurrence of relative movement caused by a group of connection structures. The mounting member 102 is generally selected as a bolt, which is a common fastener, cheap and easy to obtain.

[0048] Further, the inner diameter of the fixing seat 5 is adapted to the beam tube flange 9, and the inner diameter of the fixing seat 5 radially corresponding to the beam tube flange 9 is slightly larger than the outer diameter of the beam tube flange 9, and the inner diameter of the fixing seat 5 radially corresponding to the beam tube 3 is larger than the outer diameter of the beam tube 3 and smaller than the outer diameter of the beam tube flange 9. That is, the inner diameter of the side portion 51 of the fixing seat 5 is slightly larger than the outer diameter of the beam tube flange 9, and the slightly larger size is a positive tolerance to facilitate the assembly of the fixing seat 5. The inner diameter of the bottom 52 of the fixing seat 5 is larger than the outer diameter of the beam tube 3 and smaller than the outer diameter of the beam tube flange 9, so that the bottom 52 covers the outer side of the beam tube 3 and the bottom of the beam tube flange 9, thereby facilitating the fixed connection between the fixing seat 5 and the beam tube flange 9. On this basis, the axial dimension of the inner cavity of the fixing seat 5 is slightly smaller than the sum of the thickness of the beam tube flange 9 and the thickness of the antenna flange 12, so that the beam tube flange 9 and the antenna flange 12 can be assembled in the fixing seat 5, and a gap can be ensured between the fixing seat 5 and the dial 4. Then, the tightness of the installation of the antenna flange 12 can be adjusted by fine-tuning the length of the fixing piece 61, that is, the screwing length of the bolt, so as to achieve smooth rotation of the antenna flange 12.

[0049] On this basis, the fixing seat 5 includes a first fixing seat 53 and a second fixing seat 54, and the corresponding ends of the first fixing seat 53 and the second fixing seat 54 are spliced ​​to form an inner cavity for accommodating the antenna flange 12 and the beam tube flange 9. The adaptability of the radial size makes it inconvenient to install the beam tube flange 9 in a whole fixing seat 5. By decomposing the fixing seat 5 into two parts, the convenient installation of the beam tube flange 9 can be achieved on the basis of ensuring a simple structure and easy operation.

[0050] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A coupling structure with an antenna measurement device, characterized in that: include: A superconducting resonant cavity, a beam tube and an antenna measuring device, wherein the beam tube is arranged at the axial end of the superconducting resonant cavity, and the antenna measuring device comprises: An antenna assembly, the antenna assembly comprising an off-axis antenna and an antenna flange, the off-axis antenna being fixed through the antenna flange and extending into a beam tube of a superconducting resonant cavity; A scale plate, the scale plate is arranged on a side of the antenna flange away from the beam tube, and the scale plate surrounds the circumference of the off-axis antenna, and the scale plate is provided with scales for displaying the rotation angle along the angular direction; A fixing seat, the fixing seat is fixedly connected to the dial, and the antenna flange is rotatably arranged in the fixing seat; A rotating disk is provided on the side of the antenna flange away from the beam tube. The rotating disk is fixedly connected to the antenna flange and the two can rotate synchronously. The rotating disk surrounds the circumference of the off-axis antenna. A rotating mechanism is provided on the end of the rotating disk away from the beam tube. The rotating mechanism drives the rotating disk and the antenna flange to rotate synchronously. The rotating mechanism is driven manually or connected to a driving mechanism.

2. The coupling structure with antenna measurement device according to claim 1, characterized in that: The scale plate and the fixing seat are correspondingly provided with at least two groups of fixing holes, and each group of the fixing holes is fixedly connected by a fixing piece.

3. The coupling structure with antenna measurement device according to claim 1 or 2, characterized in that: The fixing seat includes a side portion surrounding the antenna flange, the side portion is fixedly connected to the scale plate, and one end of the side portion away from the scale plate extends radially inward to form a bottom, and the bottom is arranged on a side of the antenna flange close to the beam tube.

4. The coupling structure with antenna measurement device according to claim 1, characterized in that: The antenna flange and the rotating disk are correspondingly provided with at least two groups of connection holes, and each group of the connection holes is fixedly connected by a connecting piece.

5. The coupling structure with antenna measurement device according to claim 1, characterized in that: The rotating disk and the graduated disk are both annular structures. The graduated disk surrounds the circumference of the rotating disk. A group of graduated lines are symmetrically arranged on the rotating disk.

6. The coupling structure with antenna measurement device according to claim 1, characterized in that: One end of the beam tube away from the superconducting resonant cavity is fixedly connected to a beam tube flange, and the beam tube flange is fixed in the fixing seat. One end of the off-axis antenna is fixed through the antenna flange in sequence, rotatably passes through the beam tube flange and extends into the beam tube.

7. The coupling structure with antenna measurement device according to claim 6, characterized in that: The inner diameter of the fixing seat is adapted to the beam tube flange, and the inner diameter of the fixing seat radially corresponding to the beam tube flange is slightly larger than the outer diameter of the beam tube flange, and the inner diameter of the fixing seat radially corresponding to the beam tube is larger than the outer diameter of the beam tube and smaller than the outer diameter of the beam tube flange; The axial dimension of the inner cavity of the fixing seat is slightly smaller than the sum of the thickness of the beam tube flange and the thickness of the antenna flange.

8. The coupling structure with antenna measurement device according to claim 6, characterized in that: The fixing seat and the bundle tube flange are correspondingly provided with at least two groups of mounting holes, and each group of mounting holes is fixedly connected by a mounting piece.

9. The coupling structure with antenna measurement device according to claim 7, characterized in that: The fixing seat comprises a first fixing seat and a second fixing seat, and corresponding ends of the first fixing seat and the second fixing seat are spliced ​​to form an inner cavity for accommodating the antenna flange and the beam tube flange.

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