All-metal waveguide slot broadband antenna

Abstract

The invention discloses an all-metal waveguide slot broadband antenna, which adopts a plate type structure and comprises an antenna radiation layer, a network layer and a feed layer, a coaxial line interface of a four-in-one waveguide network of the feed layer is used for feeding, signals are transmitted and switched to a ridge waveguide, each radio frequency signal is divided into four parts through a ridge waveguide power divider, the four parts are distributed to a radiation wave port of the network layer in an equal-amplitude and same-phase mode, and then the four parts are transmitted to a feed unit of the antenna radiation layer through the four-in-one waveguide to be radiated out. And the radiation ports of the radiation layer work simultaneously. The antenna has multiple radiation wave ports, uniform arrangement and complete aperture, can realize broadband high gain and low side lobe, and is small in coaxial feed loss and high in radiation efficiency; strength is moderate, installation is convenient, various complex environments can be adapted, and reliability is high.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to an all-metal waveguide slot broadband antenna. Background Art

[0002] With the widespread popularity of 5G communication systems, the radiation efficiency, transmission loss and bandwidth matching of traditional antennas can no longer meet the requirements for base station construction.

[0003] The waveguide slot antenna has the characteristics of high radiation efficiency, low loss, high directivity and strong anti-interference ability, making it a key component in 5G base stations. It will play an important role in achieving efficient and stable wireless communication links. Summary of the invention

[0004] The present disclosure provides an all-metal waveguide slot broadband antenna, which adopts a waveguide approach to solve the above-mentioned problems.

[0005] The all-metal waveguide slot broadband antenna provided by the present disclosure mainly comprises: an antenna board (0), wherein the antenna board (0) comprises an antenna radiation layer (1), a network layer (2), a feed layer (3), and a coaxial feed port (01), wherein:

[0006] The antenna radiation layer is provided with 64N radiation slots and 16N four-in-one waveguide networks, where N is a natural number;

[0007] The network layer (2) is provided with 16N radiation waveguide ports (9) and 4N one-quarter divided ridge waveguide networks (12);

[0008] The feeding layer (3) is provided with 4N coaxial feeding ports (14);

[0009] Among them, every four radiation slot openings are synthesized into a network layer radiation waveguide opening by a four-in-one waveguide network, and every four network layer radiation waveguide openings are synthesized into a coaxial feed opening by a one-quarter-divided ridge waveguide network, and finally 4N coaxial feed openings are output.

[0010] Furthermore, the radiation slot has a length of 21.875 mm, a width of 2 mm, a rounded corner of 0.5 mm, a short axis of the radiation slot is periodically arranged at an interval of 11.85 mm, and a long axis is periodically arranged at an interval of 23.475 mm;

[0011] Every four radiation slots use a four-in-one waveguide network to synthesize a feed layer radiation waveguide port. The four-in-one waveguide network is 45.43mm long (A2), 17.43mm wide (B2), with a 1mm rounded corner. The ridge width between the two small radiation ports is 1mm (B3). The column is 6.3mm long (A3). There is a space in the middle for connecting the coaxial probe, which is 1mm long (A4) and 3.2mm wide (B4).

[0012] The radiation waveguide opening of the network layer has a length of 21.2 mm, a width of 5.27 mm, a rounded corner of 0.75 mm, a short axis of the radiation waveguide opening arranged periodically at an interval of 23.7 mm, and a long axis arranged periodically at an interval of 46.95 mm;

[0013] The ridge waveguide is divided into four equal parts, with a ridge width of 5mm (B5) and a height of 1.8mm. The waveguide wall width is 10.37mm (B6) and a height of 2.47mm, where:

[0014] The first section of ridge waveguide (1201) is 37.95 mm long (A5), the matching section 1204 is 10.615 mm long (A7), 10.9 mm wide (B12), 1.2 mm high, and has a fillet of 0.75 mm;

[0015] The second section of ridge waveguide (1202) is 2.55mm (B7) away from the first section, 7.885mm (B13) long before the corner, 5.885mm long after the corner (A9), 5.77mm cut, and 1.8mm high;

[0016] The third section of ridge waveguide (1203) is 8.32 mm long (A10) and 1.2 mm high. The third section of ridge waveguide is connected to the radiation waveguide port (9) of the large waveguide-to-network layer.

[0017] The large waveguide is 12.1885 mm wide (B8) and 21.2 mm long (A8). It is 2.17 mm away from the third ridge waveguide (B14). The recessed part is 14.2 mm long (A11) and 0.352 mm wide.

[0018] At the place where the coaxial line connects to the ridge waveguide (1205), the ridge waveguide is also 5mm wide and 6.05mm long (B9), the matching section ridge waveguide is 6.1mm wide (A13) and 5.4mm long (B11), and the distance from the first section of the ridge waveguide of the four-ridge waveguide is 6.6mm (B9), the first section of the matching ridge waveguide wall is 10.37mm wide (A14) and 1.415mm long, the second section is 16.9mm wide (A15) and 1.125mm long, the third section is 23.95mm wide (A16) and 9.4485mm long, and the coaxial probe is 1.665mm (B12) away from the end of the matching section.

[0019] Furthermore, each layer of the antenna board is connected and fixed by fixing screws.

[0020] Furthermore, the antenna radiation layer is provided with 64 radiation slots and 16 four-in-one waveguide networks;

[0021] The network layer is provided with 16 radiation waveguide ports and 4 one-quarter divided ridge waveguide networks;

[0022] The feeding layer is provided with 4 coaxial feeding ports.

[0023] Furthermore, each layer of the antenna board is integrally processed with light metal aluminum alloy.

[0024] Furthermore, each layer of the antenna board is plated with anti-oxidation silver or gold.

[0025] Compared with the prior art, the beneficial effects of the present invention are: (1) it provides an all-metal waveguide slot broadband antenna with multiple radiation wave ports and evenly arranged full apertures, achieving broadband high gain and low side lobes, small coaxial feeding loss, and high radiation efficiency; (2) it has moderate strength, is easy to install, can adapt to various complex environments, and has high reliability; (3) it is all made of light metal aluminum alloy in an integrated manner, which is simple to process and quick to assemble, greatly reducing the cost and antenna weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0027] Figure 1 is a schematic diagram of an overall antenna structure according to an exemplary embodiment of the present disclosure;

[0028] Figure 2 It is a schematic diagram of the overall explosion structure of an exemplary embodiment;

[0029] Figure 3 It is a schematic diagram of the front structure of the antenna radiation layer of an exemplary embodiment;

[0030] Figure 4 It is a schematic diagram of the back structure of the antenna radiation layer of an exemplary embodiment;

[0031] Figure 5 It is an enlarged schematic diagram of the back side of the antenna radiation layer of an exemplary embodiment;

[0032] Figure 6 It is a schematic diagram of the front structure of the antenna network layer of an exemplary embodiment;

[0033] Figure 7 A schematic diagram of the back structure of the antenna network layer of an exemplary embodiment;

[0034] Figure 8 is an enlarged schematic diagram of an antenna network layer of an exemplary embodiment;

[0035] Fig. 9 A further enlarged schematic diagram of the antenna network layer of an exemplary embodiment;

[0036] Fig.10It is a schematic diagram of the front structure of the antenna feed layer of an exemplary embodiment;

[0037] Fig.11 A schematic diagram of the back structure of the antenna feed layer of an exemplary embodiment;

[0038] Fig.12 A simulated standing wave ratio diagram of an antenna of an exemplary embodiment;

[0039] Fig.13 A low-frequency simulated radiation pattern of an antenna of an exemplary embodiment;

[0040] Fig.14 The intermediate frequency simulation pattern of the antenna of the exemplary embodiment;

[0041] Fig.15 A high frequency simulated directional pattern of an antenna of an exemplary embodiment;

[0042] In the figure: 0, antenna board; 01, coaxial cable jack; 02, fixing screw; 1, antenna radiation layer; 2, network layer; 3, feeding layer; 4, antenna radiation layer radiation wave port; 6, four-in-one waveguide network; 7, fixing screw hole; 8, weight reduction groove; 9, network layer radiation port; 10, screw fixing hole; 11, screw fixing hole; 12, one-point four-ridge waveguide network layer; 13, weight reduction groove; 14, coaxial cable jack; 15, fixing screw hole; 16, weight reduction groove; 17, coaxial cable ridge waveguide. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art.

[0044] The present disclosure provides a full metal waveguide slot broadband antenna. According to the exemplary embodiment of the present disclosure, the structure is as shown in the attached figure. Figure 1-11 As shown, including:

[0045] The antenna board 0 includes an antenna radiation layer 1, a network layer 2, a feed layer 3, a coaxial cable socket 01 and fixing screws 02.

[0046] The antenna board 0 comprises: sixty-four radiation slots 4 and sixteen four-in-one waveguide networks 6 arranged on the antenna radiation layer 1;

[0047] The network layer 2 comprises sixteen radiation waveguide ports 9 and four one-quarter ridge waveguide networks (12) arranged on the network layer 2;

[0048] The feeding layer (3) comprises four coaxial feeding ports (14) arranged on the feeding layer (3).

[0049] The antenna is synthesized in such a way that: the radiation wave port (4) includes sixty-four radiation ports, each four radiation wave ports (4) are synthesized into a radiation waveguide port (9) by using a four-in-one waveguide network (6), and each four network layer radiation wave ports (9) are synthesized into a coaxial feed port (14) by using a one-fourth equally divided ridge waveguide network (12). Finally, four coaxial feed ports (14) are output.

[0050] Preferably, the antenna board is 192mm long and 95.5mm wide, and includes a total of sixty-four radiation wave ports 4, with a length of 21.875mm, a width of 2mm, a rounded corner of 0.5mm, and the short axis of the radiation port is arranged at a period of 11.85mm, and the long axis is arranged at a period of 23.475mm; every four antenna layer radiation wave ports are synthesized into a feeding layer radiation waveguide port by a four-in-one waveguide network, and the four-in-one waveguide network is 45.43mm long (A2), 17.43mm wide (B2), and has a rounded corner of 1mm. The two small radiation ports are directly spaced 1mm apart (B3), the column is 6.3mm long (A3), and a space is left in the middle for connecting the coaxial probe, which is 1mm long (A4) and 3.2mm wide (B4).

[0051] The network layer includes: sixteen radiation wave ports 9, with a length of 21.2 mm, a width of 5.27 mm, a rounded corner of 0.75 mm, and a short axis of the radiation port arranged at a period of 23.7 mm and a long axis arranged at a period of 46.95 mm;

[0052] In order to transmit signals in a limited space, four quarter-divided ridge waveguides are used for feeding. The ridge width is 5mm (B5), the height is 1.8mm, the waveguide wall width is 10.37mm (B6), the height is 2.47mm, the first section of ridge waveguide 1201 is 37.95mm long (A5), the matching section 1204 is 10.615mm long (A7), 10.9mm wide (B12), 1.2mm high, and the rounded corner is 0.75mm The second section of ridge waveguide 1202 is 2.55mm (B7) away from the first section, 7.885mm (B13) long before the corner, 5.885mm (A9) long after the corner, 5.77mm cut, and 1.8mm high. The third section of ridge waveguide 1203 is 8.32mm long (A10) and 1.2mm high. The third section of ridge waveguide is connected to the large waveguide to the network layer radiation port 9, and the large waveguide is 12.1885mm wide ( The length of the ridge waveguide is 21.2mm (A8), and it is 2.17mm away from the third ridge waveguide (B14). The concave part is 14.2mm long (A11) and 0.352mm wide. The coaxial line connects to the ridge waveguide at 1205, and the ridge waveguide is also 5mm wide and 6.05mm long (B9). The matching ridge waveguide is 6.1mm wide (A13) and 5.4mm long (B11), which is 2.17mm away from the first ridge waveguide of the four-ridge waveguide. The distance between the coaxial probe and the end of the matching section is 1.665mm (B12). In order to drive in the fixing screws, there is a gap of 0.35mm between the waveguide wall and the hole.

[0053] Working principle of this antenna:

[0054] The signal is fed through the four coaxial cable interfaces of the four-in-one waveguide network of the feeding layer and transferred to the ridge waveguide. Each RF signal is divided into four by the ridge waveguide power divider and distributed to the radiation wave port of the network layer with equal amplitude and phase, and then transmitted to the antenna radiation layer feeding unit through the four-in-one waveguide to be radiated, so that the sixty-four radiation ports work simultaneously.

[0055] The all-metal waveguide slot broadband antenna provided in this embodiment has multiple radiation wave ports, which are evenly arranged and have a complete aperture. The electromagnetic performance simulation is shown in the attached figure. Figure 12-15 As shown, it has the advantages of broadband, high gain, low side lobe, small coaxial feeding loss and high radiation efficiency.

[0056] Preferably, the radiation layer, network layer and feed layer of the antenna board in this embodiment are all integrally processed with light metal aluminum alloy, which is simple to process and quick to assemble, greatly reducing the cost and weight of the antenna.

[0057] Preferably, the antenna board in this embodiment has a radiation layer, a network layer, and a feed layer all using an anti-oxidation silver plating (or gold plating) process, which has good conductive properties and further ensures that the antenna has excellent electromagnetic properties.

[0058] The above technical scheme is only an exemplary embodiment of the present invention. For those skilled in the art, it is easy to make various types of improvements or modifications based on the application methods and principles disclosed in the present invention, and it is not limited to the method described in the above specific embodiment of the present invention. Therefore, the method described above is only preferred and does not have a restrictive meaning.

Claims

1. An all-metal waveguide slot broadband antenna, characterized in that: include: An antenna board (0), the antenna board (0) comprising an antenna radiation layer (1), a network layer (2), a feed layer (3), and a coaxial feed port (01), wherein: The antenna radiation layer is provided with 64N radiation slots and 16N four-in-one waveguide networks, where N is a natural number; The network layer (2) is provided with 16N radiation waveguide ports (9) and 4N one-quarter divided ridge waveguide networks (12); The feeding layer (3) is provided with 4N coaxial feeding ports (14); Among them, every four radiation slot openings are synthesized into a network layer radiation waveguide opening by a four-in-one waveguide network, and every four network layer radiation waveguide openings are synthesized into a coaxial feed opening by a one-quarter-divided ridge waveguide network, and finally 4N coaxial feed openings are output.

2. The antenna according to claim 1, characterized in that: The radiation slot has a length of 21.875 mm, a width of 2 mm, a rounded corner of 0.5 mm, a short axis of the radiation slot is periodically arranged at an interval of 11.85 mm, and a long axis is periodically arranged at an interval of 23.475 mm; Every four radiation slots use a four-in-one waveguide network to synthesize a feed layer radiation waveguide port. The four-in-one waveguide network is 45.43mm long (A2), 17.43mm wide (B2), with a 1mm rounded corner. The ridge width between the two small radiation ports is 1mm (B3). The column is 6.3mm long (A3). There is a space in the middle for connecting the coaxial probe, which is 1mm long (A4) and 3.2mm wide (B4). The radiation waveguide opening of the network layer has a length of 21.2 mm, a width of 5.27 mm, a rounded corner of 0.75 mm, a short axis of the radiation waveguide opening arranged periodically at an interval of 23.7 mm, and a long axis arranged periodically at an interval of 46.95 mm; The ridge waveguide is divided into four equal parts, with a ridge width of 5mm (B5) and a height of 1.8mm. The waveguide wall width is 10.37mm (B6) and a height of 2.47mm, where: The first section of ridge waveguide (1201) is 37.95 mm long (A5), the matching section (1204) is 10.615 mm long (A7), 10.9 mm wide (B12), 1.2 mm high, and has a fillet of 0.75 mm; The second section of ridge waveguide (1202) is 2.55mm (B7) away from the first section, 7.885mm (B13) long before the corner, 5.885mm long after the corner (A9), 5.77mm cut, and 1.8mm high; The third section of ridge waveguide (1203) is 8.32 mm long (A10) and 1.2 mm high. The third section of ridge waveguide is connected to the radiation waveguide port (9) of the large waveguide-to-network layer. The large waveguide is 12.1885 mm wide (B8) and 21.2 mm long (A8). It is 2.17 mm away from the third ridge waveguide (B14). The recessed part is 14.2 mm long (A11) and 0.352 mm wide. At the place where the coaxial line connects to the ridge waveguide (1205), the ridge waveguide is also 5mm wide and 6.05mm long (B9), the matching section ridge waveguide is 6.1mm wide (A13) and 5.4mm long (B11), and the distance from the first section of the ridge waveguide of the four-ridge waveguide is 6.6mm (B9), the first section of the matching ridge waveguide wall is 10.37mm wide (A14) and 1.415mm long, the second section is 16.9mm wide (A15) and 1.125mm long, the third section is 23.95mm wide (A16) and 9.4485mm long, and the coaxial probe is 1.665mm (B12) away from the end of the matching section.

3. The antenna according to claim 1, characterized in that The various layers of the antenna plate are connected and fixed by fixing screws.

4. The antenna according to claim 1, characterized in that: The antenna radiation layer is provided with 64 radiation slots and 16 four-in-one waveguide networks; The network layer is provided with 16 radiation waveguide ports and 4 one-quarter divided ridge waveguide networks; The feeding layer is provided with 4 coaxial feeding ports.

5. The antenna according to any one of claims 1 to 4, characterized in that: Each layer of the antenna plate is integrally processed with light metal aluminum alloy.

6. The antenna according to any one of claims 1 to 4, characterized in that: Each layer of the antenna board is plated with anti-oxidation silver or gold.

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