Nail bed structure suitable for waveguide antenna and waveguide antenna

Abstract

The utility model provides a nail bed structure suitable for a waveguide antenna and the waveguide antenna, and the nail bed structure comprises a plurality of nail beds, one end of each nail bed is connected to the periphery of a waveguide opening, and the other end of each nail bed is connected or in clearance fit with a PCB substrate of the waveguide antenna; wherein the end part of the micro-strip feeder line on the PCB substrate is positioned in a space defined by the nail bed. The nail bed structure provided by the utility model can effectively avoid the problem of energy leakage caused by a gap between the PCB substrate and the waveguide antenna, and reduces the insertion loss of the antenna.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, specifically to a nail bed structure and a waveguide antenna suitable for waveguide antennas. Background Technology

[0002] Traditional microstrip-to-waveguide transmission structure designs typically involve inserting a microstrip feed line along the narrow or wide side of a rectangular waveguide, perpendicular to the waveguide's side surface. A signal of appropriate frequency is fed into the microstrip feed line, exciting an electrical signal that can propagate along the waveguide transmission line, thus serving as both a switching and transmission mechanism. Figure 1 This is a typical microstrip-to-waveguide structure design. In this type of design, the microstrip feed line is placed on the PCB and connected to the RF chip. Simultaneously, the microstrip feed line is inserted into the end of the waveguide cavity. This design has several drawbacks: firstly, the insertion structure requires maintaining a certain gap, posing a risk of energy leakage and resulting in significant insertion loss; secondly, this design typically requires high precision in component assembly, increasing manufacturing costs; and thirdly, this design cannot completely separate the microstrip feed line and the waveguide cavity spatially, further increasing the difficulty of product design, component manufacturing, and assembly. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a nail bed structure and a waveguide antenna suitable for waveguide antennas.

[0004] According to the present invention, a nail bed structure suitable for waveguide antennas is provided, connected at the waveguide opening 4 of the waveguide antenna, comprising:

[0005] Multiple nail beds 5, one end of each nail bed 5 is connected to the outer periphery of the waveguide opening 4, and the other end is connected to or clearance-fitted with the PCB substrate 7 of the waveguide antenna;

[0006] The end of the microstrip feed line 6 on the PCB substrate 7 is located within the space enclosed by the nail bed.

[0007] Furthermore, the waveguide opening 4 is quadrilateral, and the nail bed 5 is distributed outside the edge of the quadrilateral.

[0008] Furthermore, the shape of the nail bed includes: cylindrical, square, and conical.

[0009] Furthermore, the gap between the other end of the nail bed and the PCB substrate 7 is 0mm-0.5mm.

[0010] Furthermore, the center-to-center distance between adjacent nail beds is 1mm-1.5mm.

[0011] Furthermore, the height of the nail bed 5 is 0.7mm-1.2mm.

[0012] Furthermore, the end of the microstrip feed line 6 is located at the projection center of the waveguide opening 4 onto the PCB substrate 7.

[0013] Furthermore, the nail bed 5 is made of a non-conductive material, and the surface of the nail bed 5 is coated with a metal film.

[0014] Furthermore, the nail bed 5 is made of conductive metal.

[0015] According to the present invention, a waveguide antenna includes the aforementioned nail bed structure suitable for waveguide antennas.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The nail bed structure of this invention can effectively avoid energy leakage caused by the gap between the PCB substrate and the waveguide antenna, and reduce the insertion loss of the antenna. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of a traditional microstrip waveguide structure.

[0020] Figure 2 This is a perspective view of the waveguide antenna of this utility model;

[0021] Figure 3 This is a cross-sectional view of the waveguide antenna of this utility model;

[0022] Figure 4 This is a plan view of the nail bed structure of this utility model. Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] like Figure 2 , Figure 3 and Figure 4As shown, this embodiment provides a nail bed structure suitable for waveguide antennas. The nail bed structure is connected to the waveguide opening 4 of the waveguide antenna and includes multiple nail beds 5. One end of each nail bed 5 is connected to the outer periphery of the waveguide opening 4, and the other end is connected to or clearance-fitted with the PCB substrate 7 of the waveguide antenna. The end of the microstrip feed line 6 on the PCB substrate 7 is located within the space enclosed by the multiple nail beds 5. The waveguide opening 4 is typically rectangular, and the nail beds 5 are located outside the rectangular edges; this invention does not limit this.

[0025] The bed-of-nails structure helps prevent or reduce electromagnetic waves from escaping from the gap between the PCB substrate 7 and the waveguide antenna 2. The end of the microstrip feed line 6 is located at the center of the waveguide opening 4 projected onto the PCB substrate 7. The bottom surface of the bed-of-nails structure maintains a nominal gap of 0mm-0.5mm with the top surface of the PCB substrate 7. The bed-of-nails structure consists of multiple beds 5 with diameters of 0.4mm-0.8mm and heights of 0.7mm-1.2mm, arranged periodically around the waveguide opening 4 at center-to-center intervals of 1mm-1.5mm. The surface of the bed-of-nails structure can also be coated with a metal film 3.

[0026] like Figure 2 , Figure 3 As shown, this embodiment also provides a waveguide antenna, including the above-mentioned bed of nails structure, which is suitable for the 76GHz-81GHz frequency band and can be matched with existing traditional microstrip radio frequency chips, bringing the feasibility of developing next-generation waveguide antenna radars to radar manufacturers.

[0027] The waveguide antenna 2 is designed with a waveguide transmission line 1, a bed of nails structure and a slot antenna subarray 21. The base material is a good electrical conductor (such as aluminum alloy, copper alloy, etc.) or plastic material with a metal film coated on the surface.

[0028] The design of two or more microstrip feed lines 6, perpendicular to the short side of the waveguide opening 4 and centered on the opening 4, is mounted on a PCB substrate 7. With appropriate sizing, the microstrip feed lines 6 can generate an alternating electromagnetic field perpendicular to the long side of the waveguide transmission line 1 within the waveguide cavity, thereby forming an electromagnetic wave that can propagate in the waveguide transmission line 1. The number of microstrip feed lines 6 depends on the chip specifications and radar performance requirements, and they are integrated onto the PCB substrate 7 using PCB printing technology. Various sizes of microstrip feed lines 6 can be designed, and no specific size is limited here.

[0029] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0030] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A stud bed structure suitable for use in a waveguide antenna, characterized by, Connected at the waveguide opening (4) of the waveguide antenna, comprising: a plurality of peg beds (5) connected at one end to the outer periphery of the waveguide opening (4) and at the other end to the PCB substrate (7) of the waveguide antenna or in clearance fit; the end of the microstrip feed line (6) on the PCB substrate (7) is located in the space enclosed by the peg bed.

2. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The waveguide opening (4) is quadrilateral, and the peg bed (5) is distributed outside the side line of the quadrilateral.

3. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The shape of the peg bed includes: cylindrical, square column or conical.

4. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The clearance between the other end of the peg bed and the PCB substrate (7) is 0mm-0.5mm.

5. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The center distance between adjacent peg beds is 1mm-1.5mm.

6. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The height of the peg bed (5) is 0.7mm-1.2mm.

7. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The end of the microstrip feed line (6) is located at the projection center of the waveguide opening (4) on the PCB substrate (7).

8. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The peg bed (5) is made of non-conductive material, and the surface of the peg bed (5) is plated with a metal film.

9. The stud bed structure suitable for a waveguide antenna according to claim 1, wherein, The peg bed (5) is made of conductive metal material.

10. A waveguide antenna, characterized by The peg bed structure suitable for the waveguide antenna of claim 1 is included.

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