Transmission line structure of waveguide antenna

Abstract

The utility model relates to a transmission line structure of a waveguide antenna, and relates to the technical field of microwave elements. The structure comprises bottom-layer conductive metal, the surface of the bottom-layer conductive metal is provided with a ridge structure, the ridge structure is arranged in the length direction of the bottom-layer conductive metal, the surface of the bottom-layer conductive metal is further provided with two rows of periodic unit structures in the length direction, and the ridge structure is located between the two rows of periodic unit structures. One side, close to the ridge structure, of the periodic unit structure is provided with a bonding structure, the bonding structure is parallel to the periodic unit structure, and the periodic unit structure and the bonding structure are both adhered to the surface of the bottom conductive metal. The transmission line structure has the advantages that low-loss transmission of the transmission line structure is achieved, machining time is shortened, machining cost is reduced, and the yield of finished products is increased.

Description

Technical Field

[0001] This application relates to the field of microwave component technology, and in particular to a transmission line structure for a waveguide antenna. Background Technology

[0002] In radar, waveguide antennas are widely used for their low-loss and high-efficiency transmission of electromagnetic waves. In waveguide antennas, waveguide transmission lines are structures used to transmit electromagnetic waves, commonly used in high-frequency communication systems, radar systems, and microwave equipment. Their basic principle is to use the conductor boundary of the waveguide to limit the propagation of electromagnetic waves, thereby allowing them to propagate along the length of the waveguide. Furthermore, the transmission line structure of the gap waveguide scheme is also widely used in the design of waveguide antenna feed lines and port adapters.

[0003] In related technologies, a transmission line structure for a waveguide antenna is designed, referring to... Figure 1 and Figure 2 The structure includes a bottom conductive metal 1 and an upper conductive metal 2. The surface of the bottom conductive metal 1 is provided with several rows of periodic unit structures 3, which are cylindrical. The surface of the bottom conductive metal 1 is also provided with ridge structures 4. The transmission line structure of this technology using the gap waveguide scheme is composed of cylinders with a certain periodic arrangement. If CNC machining is used, for millimeter-wave radar antennas, the number of cylinders can be hundreds or thousands, resulting in a long machining time. In addition, if the machining is not done properly, the cylinders are prone to breakage, affecting the antenna performance. Therefore, the yield is relatively low and needs to be improved. Utility Model Content

[0004] In order to achieve low-loss transmission in a transmission line structure while shortening processing time and cost and improving product yield, this application provides a transmission line structure for a waveguide antenna.

[0005] The transmission line structure of the waveguide antenna provided in this application adopts the following technical solution:

[0006] A transmission line structure for a waveguide antenna includes a bottom conductive metal, a ridge structure disposed on the surface of the bottom conductive metal, the ridge structure being disposed along the length direction of the bottom conductive metal, and two rows of periodic unit structures disposed on the surface of the bottom conductive metal along the length direction, the ridge structure being located between the two rows of periodic unit structures, a bonding structure being disposed on the side of the periodic unit structure near the ridge structure, the bonding structure being parallel to the periodic unit structure, and both the periodic unit structure and the bonding structure being bonded to the surface of the bottom conductive metal.

[0007] Preferably, the periodic unit structure adopts an irregular shape, which includes, but is not limited to, cylindrical, trapezoidal, and square shapes.

[0008] Preferably, the bonding structure includes a plurality of periodic unit structures and a stepped structure for bonding the plurality of periodic unit structures, wherein the top of the stepped structure is more than 0.25 mm away from the top of the periodic unit structure.

[0009] Preferably, the bonding structure includes a plurality of periodic unit structures and a first bonding block, each of the first bonding blocks corresponding to two adjacent and independent periodic unit structures, the first bonding block being used to bond the corresponding two periodic unit structures together, and the number of the first bonding blocks being greater than 2.

[0010] Preferably, the bonding structure includes a plurality of periodic unit structures, a first bonding block and a second bonding block, each of the first bonding block and the second bonding block corresponding to two adjacent and independent periodic unit structures, the first bonding block and the second bonding block are spaced apart, the first bonding block and the second bonding block are used to bond the two periodic unit structures corresponding to each other, and the sum of the number of the first bonding block and the second bonding block is greater than 2.

[0011] Preferably, the bonding structure includes a plurality of periodic unit structures and a boss structure disposed between two adjacent periodic unit structures, wherein the height difference between the boss structure and the periodic unit structure is greater than 0.25 mm.

[0012] Preferably, the bonding structure includes several periodic structures and several boss structures, with four consecutive periodic unit structures forming a group, and the boss structures being disposed between two adjacent periodic unit structures in each group.

[0013] Preferably, the height difference of the boss structure between each group of periodic unit structures is greater than or equal to 0, and the height difference between the tallest boss structure and the periodic unit structure in each group of boss structures is greater than 0.25 mm.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. The bonding structures on both sides of the ridge structure in this application adopt several different forms, which can increase the structural size while ensuring low-loss transmission of electromagnetic energy, significantly reduce the difficulty of processing and manufacturing, and save production costs;

[0016] 2. The bonding structure of this application incorporates steps of varying heights, further increasing the structural dimensions and improving the product yield of the transmission line;

[0017] 3. The periodic unit structure in the bonding structure of this application can achieve zero gap, and at the same time, it can make great use of the mutual cooperation between structures to achieve higher space utilization, and achieve shorter processing time and higher product yield while ensuring transmission line performance. Attached Figure Description

[0018] Figure 1 This is a top view of the transmission line structure in related technologies.

[0019] Figure 2 This is a side view of the transmission line structure in related technologies.

[0020] Figure 3 This is a top view of the transmission line structure in Embodiment 1 of this application.

[0021] Figure 4 This is a side view of the transmission line structure in Embodiment 1 of this application.

[0022] Figure 5 This is a top view of the first type of transmission line in Embodiment 2 of this application.

[0023] Figure 6 This is a top view of the second type of transmission line in Embodiment 2 of this application.

[0024] Figure 7 This is a top view of the transmission line structure in Embodiment 3 of this application.

[0025] Figure 8 This is a side view of the transmission line structure in Embodiment 3 of this application.

[0026] Figure 9 This is a top view of the transmission line structure in Embodiment 4 of this application.

[0027] Figure 10 This is a side view of the transmission line structure in Embodiment 4 of this application.

[0028] Explanation of reference numerals in the attached figures: 1. Bottom conductive metal; 2. Top conductive metal; 3. Periodic unit structure; 4. Ridge structure; 5. Bonding structure; 6. Step structure; 7. First bonding block; 8. Second bonding block; 9. Boss structure. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 3-10 This application will be described in further detail.

[0030] This application discloses a transmission line structure for a waveguide antenna. (Refer to...) Figures 3-10The system includes a bottom conductive metal 1, on the surface of which a ridge structure 4 is formed. The ridge structure 4 is located at the center of the bottom conductive metal 1 and is arranged along the length of the bottom conductive metal 1. Two rows of periodic unit structures 3 are bonded to the surface of the bottom conductive metal 1. Each row of periodic unit structures 3 is arranged along the length of the bottom conductive metal 1. The ridge structure 4 is located between the two rows of periodic unit structures 3. The periodic unit structures 3 adopt irregular shapes, including but not limited to cylindrical, trapezoidal, and square shapes. Each row of periodic unit structures 3 has a bonding structure 5 on the side near the ridge structure 4. The bonding structure 5 is connected to the bottom conductive metal 1 by bonding.

[0031] Example 1:

[0032] Reference Figure 3 and Figure 4 The bonding structure 5 includes several periodic unit structures 3 and a step structure 6 for bonding the several periodic unit structures 3. The distance between the top of the step structure 6 and the top of the periodic unit structure 3 is greater than 0.25 mm. In this embodiment, the shape formed by the combination of the periodic unit structure 3 and the step structure 6 is wavy, and the wavy side is set towards the ridge structure 4.

[0033] Example 2:

[0034] Reference Figure 5 The bonding structure 5 includes several periodic unit structures 3 and first bonding blocks 7. Each first bonding block 7 corresponds to two adjacent and independent periodic unit structures 3. The first bonding block 7 is used to bond the corresponding two periodic unit structures 3 together. The number of first bonding blocks 7 is greater than 2.

[0035] Specifically, refer to Figure 6 The bonding structure 5 may also include a number of second bonding blocks 8. Each first bonding block 7 and second bonding block 8 corresponds to two adjacent and independent periodic unit structures 3. The first bonding blocks 7 and second bonding blocks 8 are arranged at intervals. The first bonding blocks 7 and second bonding blocks 8 are used to bond the two periodic unit structures 3 corresponding to each other. The sum of the number of first bonding blocks 7 and second bonding blocks 8 is greater than 2.

[0036] Example 3:

[0037] Reference Figure 7 and Figure 8 The bonding structure 5 includes several periodic unit structures 3 and a boss structure 9 disposed between two adjacent periodic unit structures 3. The height difference between the boss structure 9 and the periodic unit structure 3 is greater than 0.25 mm.

[0038] Example 4:

[0039] Reference Figure 9 and Figure 10 Unlike embodiment 3, the bonding structure 5 includes several periodic structures and several boss structures 9. Four consecutive periodic unit structures 3 form a group, and the boss structure 9 is disposed between two adjacent periodic unit structures 3 in each group. The height difference of the boss structure 9 between each group of periodic unit structures 3 is greater than or equal to 0, and the height difference between the tallest boss structure 9 and the periodic unit structure 3 in each group of boss structures 9 is greater than 0.25 mm.

[0040] The implementation principle of the transmission line structure of a waveguide antenna in this application embodiment is as follows: The bonding structures 5 on both sides of the ridge structure 4 in this application adopt several different forms, which can increase the structural size while ensuring low-loss transmission of electromagnetic energy, significantly reduce the processing and manufacturing difficulty, and save production costs. At the same time, the periodic unit structure 3 in the bonding structure 5 of this application can achieve zero gap, and can make great use of the mutual cooperation between structures to achieve higher space utilization. Under the premise of ensuring transmission line performance, it can achieve shorter processing time and higher product yield.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A waveguide antenna transmission line structure comprising a bottom layer of conductive metal, the bottom layer of conductive metal being provided with a ridge structure, the ridge structure being provided along a length direction of the bottom layer of conductive metal, characterized in that: The bottom conductive metal surface is further provided with two rows of periodic unit structures along the length direction, the ridge structure is located between the two rows of periodic unit structures, the periodic unit structure is provided with a bonding structure on the side close to the ridge structure, the bonding structure is parallel to the periodic unit structure, and the periodic unit structure and the bonding structure are bonded to the bottom conductive metal surface.

2. A waveguide antenna transmission line structure according to claim 1, characterized in that: The periodic unit structure adopts a special-shaped structure, and the special-shaped structure includes but is not limited to a cylindrical shape, a trapezoidal shape and a square shape.

3. The waveguide antenna transmission line structure of claim 1, wherein: The bonding structure includes a plurality of periodic unit structures and a stepped structure for bonding the plurality of periodic unit structures, and a distance from a top of the stepped structure to a top of the periodic unit structure is greater than 0.25 mm.

4. The waveguide antenna transmission line structure of claim 1, wherein: The bonding structure includes a plurality of periodic unit structures and a first bonding block, each first bonding block corresponds to two adjacent and independent periodic unit structures, the first bonding block is used for bonding the two corresponding periodic unit structures, and a number of the first bonding blocks is greater than 2.

5. The waveguide antenna transmission line structure of claim 1, wherein: The bonding structure includes a plurality of periodic unit structures, a first bonding block and a second bonding block, each first bonding block and second bonding block corresponds to two adjacent and independent periodic unit structures, the first bonding block and the second bonding block are arranged at intervals, the first bonding block and the second bonding block are used for bonding the two corresponding periodic unit structures, and a sum of numbers of the first bonding block and the second bonding block is greater than 2.

6. The waveguide antenna transmission line structure of claim 1, wherein: The bonding structure includes a plurality of periodic unit structures and a boss structure arranged between adjacent two periodic unit structures, and a height difference between the boss structure and the periodic unit structure is greater than 0.25 mm.

7. The waveguide antenna transmission line structure of claim 1, wherein: The bonding structure includes a plurality of periodic structures and a plurality of boss structures, four continuous periodic unit structures form a group, and the boss structure is arranged between adjacent two periodic unit structures in each group.

8. A waveguide antenna transmission line structure according to claim 7, characterised in that: A height difference between the boss structure and the periodic unit structure in each group is greater than or equal to 0, and a height difference between the highest boss structure and the periodic unit structure in each group is greater than 0.25 mm.

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