All-metal waveguide slot broadband antenna

Abstract

The utility model 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 utility model relates to the technical field of antenna, especially in a kind of full metal waveguide slot broadband antenna. BACKGROUND

[0002] With the wide popularity of 5G communication system, the radiation efficiency, transmission loss and bandwidth matching of traditional antenna cannot meet the use requirements of base station construction.

[0003] The waveguide slot antenna has the characteristics of high radiation efficiency, low loss, high directivity and strong anti-interference ability, which makes it a key component in 5G base station and plays an important role in realizing efficient and stable wireless communication link. SUMMARY

[0004] The present disclosure provides a kind of full metal waveguide slot broadband antenna, which uses the mode of waveguide to solve the above-mentioned problems.

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

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

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

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

[0009] Among them, every four radiation slot ports are synthesized into a network layer radiation waveguide port by a four-in-one waveguide network, and every four network layer radiation waveguide ports are synthesized into a coaxial feed port by a one-to-four equal division ridge waveguide network, and finally 4N coaxial feed ports are output.

[0010] Further, the radiation slot port length is 21.875mm, the width is 2mm, the round corner is 0.5mm, the short axis of the radiation port slot is arranged at intervals of 11.85mm, and the long axis is arranged at intervals of 23.475mm;

[0011] Every four radiation slot ports are synthesized into a feed layer radiation waveguide port by a four-in-one waveguide network, the four-in-one waveguide network is 45.43mm (A2) long, 17.43mm (B2) wide, 1mm round corner, the ridge width between two small radiation ports is 1mm (B3), the column is 6.3mm (A3) long, there is a space in the middle for connecting coaxial probe, 1mm (A4) long, 3.2mm (B4) wide;

[0012] The network layer radiating waveguide port has a length of 21.2 mm, a width of 5.27 mm, a round corner of 0.75 mm, and the short axis of the radiating waveguide port is arranged periodically with a spacing of 23.7 mm, and the long axis is arranged periodically with a spacing of 46.95 mm;

[0013] The one-to-four divided ridge waveguide has a ridge width of 5 mm (B5) and a height of 1.8 mm, and the waveguide wall has a width of 10.37 mm (B6) and a height of 2.47 mm, wherein:

[0014] The first section of the ridge waveguide (1201) has a length of 37.95 mm (A5), the matching section 1204 has a length of 10.615 mm (A7), a width of 10.9 mm (B12), and a height of 1.2 mm, and a round corner of 0.75 mm;

[0015] The second section of the ridge waveguide (1202) is spaced apart from the first section by 2.55 mm (B7), has a length of 7.885 mm (B13) without a corner, a length of 5.885 mm (A9) after the corner, a cut corner of 5.77 mm, and a same height of 1.8 mm;

[0016] The third section of the ridge waveguide (1203) has a length of 8.32 mm (A10) and a height of 1.2 mm, and the third section of the ridge waveguide is connected to the large waveguide transition network layer radiating waveguide port (9);

[0017] The large waveguide has a width of 12.1885 mm (B8) and a length of 21.2 mm (A8), is spaced apart from the third section of the ridge waveguide by 2.17 mm (B14), and has a recessed part with a length of 14.2 mm (A11) and a width of 0.352 mm;

[0018] The coaxial line is connected to the ridge waveguide at (1205), the ridge waveguide has a same width of 5 mm and a length of 6.05 mm (B9), the matching section of the ridge waveguide has a width of 6.1 mm (A13) and a length of 5.4 mm (B11), is spaced apart from the first section of the one-to-four ridge waveguide by 6.6 mm (B9), the matching and ridge waveguide wall has a first section with a width of 10.37 mm (A14) and a length of 1.415 mm, a second section with a width of 16.9 mm (A15) and a length of 1.125 mm, and a third section with a width of 23.95 mm (A16) and a length of 9.4485 mm, and the coaxial probe is spaced apart from the end of the matching section by 1.665 mm (B12).

[0019] Further, the antenna board layers are fixed by fixing screws.

[0020] Further, the antenna radiating layer is provided with 64 radiating slot ports and 16 four-in-one waveguide networks.

[0021] The network layer is provided with 16 radiating waveguide ports and 4 one-to-four divided ridge waveguide networks.

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

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

[0024] Further, each layer of the antenna board is processed by silver plating or gold plating process.

[0025] Compared with the prior art, the present disclosure has the following advantages: (1) a full-metal waveguide slot broadband antenna is provided, which has multiple radiation wave ports, uniform arrangement and complete aperture, realizes wideband high gain and low sidelobe, has small coaxial feeding loss and high radiation efficiency; (2) the strength is moderate, the installation is convenient, and the antenna can adapt to various complex environments and has high reliability; (3) each layer is integrally processed by light metal aluminum alloy, which is simple to process, fast to assemble, and greatly reduces the cost and weight of the antenna. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description of exemplary embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which like reference characters refer to the like parts throughout the different views.

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

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

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

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

[0031] Figure 5 It is a schematic diagram of the back surface of the antenna radiation layer of the exemplary embodiment;

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

[0033] Figure 7 It is a schematic diagram of the back surface structure of the antenna network layer of the exemplary embodiment;

[0034] Figure 8 It is a schematic diagram of the antenna network layer of the exemplary embodiment;

[0035] Figure 9 It is a schematic diagram of the antenna network layer of the exemplary embodiment;

[0036] Figure 10Front view of the antenna feed layer structure of the example embodiment;

[0037] Figure 11 Back view of the antenna feed layer structure of the example embodiment;

[0038] Figure 12 Antenna simulation standing wave ratio diagram of the example embodiment;

[0039] Figure 13 Antenna low frequency simulation pattern of the example embodiment;

[0040] Figure 14 Antenna medium frequency simulation pattern of the example embodiment;

[0041] Figure 15 Antenna high frequency simulation pattern of the example embodiment;

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

[0043] Preferred embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although preferred embodiments of the present disclosure are shown in the 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. Rather, these embodiments are provided so that the present disclosure is 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 structure of the example embodiment of the present disclosure as shown in the accompanying drawings Figures 1-11 comprises:

[0045] The antenna board 0 comprises an antenna radiation layer 1, a network layer 2, a feed layer 3, a coaxial line jack 01, and a fixing screw 02.

[0046] The antenna board 0 comprises: sixty-four radiation slot ports 4 provided on the antenna radiation layer 1, sixteen four-in-one waveguide networks 6;

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

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

[0049] The synthesis of the antenna: the radiating wave port (4) comprises sixty-four radiating ports, and every four radiating wave ports (4) are synthesized into one radiating waveguide port (9) by a four-in-one waveguide network (6), and every four network layer radiating wave ports (9) are synthesized into one coaxial feed port (14) by a one-to-four divided ridge waveguide network (12). Finally, four coaxial feed ports (14) are outputted.

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

[0051] The network layer comprises sixteen radiating wave ports 9, each of which is 21.2 mm long, 5.27 mm wide, and has a round corner of 0.75 mm, and the short axis of the radiating port is arranged in a period of 23.7 mm, and the long axis is arranged in a period of 46.95 mm.

[0052] In order to transmit signals in limited space, four one-fourth split 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 the ridge waveguide 1201 is 37.95mm (A5) long, the matching section 1204 is 10.615mm (A7) long, 10.9mm (B12) wide, 1.2mm high, the round corner is 0.75mm, the second section of the ridge waveguide 1202 is 2.55mm (B7) away from the first section, the length of the section without turning is 7.885mm (B13), the length of the section after turning is 5.885mm (A9), the cut angle is 5.77mm, and the height is also 1.8mm, the third section of the ridge waveguide 1203 is 8.32mm (A10) long, 1.2mm high, the third section of the ridge waveguide is connected to the large waveguide turning network layer radiation port 9, the large waveguide is 12.1885mm (B8) wide, 21.2mm (A8) long, and is 2.17mm (B14) away from the third section of the ridge waveguide, the recessed part is 14.2mm (A11) long and 0.352mm wide; the coaxial line is connected to the ridge waveguide at 1205, the ridge waveguide is also 5mm wide and 6.05mm (B9) long, the matching section of the ridge waveguide is 6.1mm (A13) wide and 5.4mm (B11) long, and is 6.6mm (B9) away from the first section of the one-fourth split ridge waveguide, the matching section and the first section of the ridge waveguide wall are 10.37mm (A14) wide and 1.415mm long, the second section is 16.9mm (A15) wide and 1.125mm long, the third section is 23.95mm (A16) wide and 9.4485mm long, the coaxial probe is 1.665mm (B12) away from the end of the matching section, and in order to punch the fixing screw, the waveguide wall and the hole position have a spacing of 0.35mm.

[0053] The working principle of the antenna is as follows:

[0054] The four coaxial line interfaces of the four-in-one waveguide network of the feeding layer are fed, and the signals are transmitted into the ridge waveguide. Each radio frequency signal is equally divided into four by the ridge waveguide power divider, and is distributed to the radiation wave ports of the network layer in phase, and then is transmitted to the antenna radiation layer feeding unit through the four-in-one waveguide and is radiated out, so that the sixty-four radiation ports work simultaneously.

[0055] The full-metal waveguide slot broadband antenna provided by the embodiment has the advantages of wide bandwidth, high gain, low sidelobe, small coaxial feeding loss, high radiation efficiency and the like. Figures 12-15

[0056] As preferred, the antenna board in the embodiment is integrally processed by light metal aluminum alloy, which is simple to process, fast to assemble, greatly reduces the cost and the weight of the antenna.

[0057] ​Preferably, in this embodiment, the antenna board's radiating layer, network layer, and feed layer are all plated with anti-oxidation silver (or gold), which has good conductivity and further ensures that the antenna has excellent electromagnetic performance.

[0058] The above technical solutions are merely exemplary embodiments of this utility model. For those skilled in the art, based on the application methods and principles disclosed in this utility model, it is easy to make various types of improvements or modifications, and not limited to the methods described in the specific embodiments of this utility model. Therefore, the methods described above are only preferred and not restrictive.

Claims

1. A broadband antenna with an all-metal waveguide slot, characterized in that, include: Antenna board (0), the antenna board (0) includes an antenna radiating layer (1), a network layer (2), a feed layer (3), and a coaxial feed port, wherein: The antenna radiating layer has 64N radiating slots and 16N four-in-one waveguide networks, where N is a natural number; The network layer (2) has 16N radiation waveguide ports (9) and 4N one-to-four ridge waveguide networks (12); The feed layer (3) is provided with 4N coaxial feed ports; In this process, every four radiating slots are combined into a network layer radiating waveguide port using a four-in-one waveguide network, and every four network layer radiating waveguide ports are combined into a coaxial feed port using a one-to-four ridge waveguide network, ultimately outputting 4N coaxial feed ports.

2. The antenna according to claim 1, characterized in that: The radial slits are 21.875 mm long, 2 mm wide, and have a 0.5 mm radius. The short axis of the radial slits is arranged at an interval of 11.85 mm, and the long axis is arranged at an interval of 23.475 mm. Every four radiating slots are combined into a feed layer radiating waveguide port using a four-in-one waveguide network. The four-in-one waveguide network is 45.43 mm long (A2), 17.43 mm wide (B2), with a 1 mm rounded corner. The ridge width between two small radiating ports is 1 mm (B3), and the pillar is 6.3 mm long (A3). A space is left in the middle for connecting a coaxial probe, which is 1 mm long (A4) and 3.2 mm wide (B4). The radiation waveguide aperture of the network layer has a length of 21.2 mm, a width of 5.27 mm, and a corner radius of 0.75 mm. The short axis of the radiation waveguide aperture is arranged periodically at intervals of 23.7 mm, and the long axis is arranged periodically at intervals of 46.95 mm. A ridge waveguide divided into four equal parts, with a ridge width of 5 mm (B5) and a height of 1.8 mm, and a waveguide wall width of 10.37 mm (B6) and a height of 2.47 mm, wherein: The first ridge waveguide (1201) is 37.95 mm long (A5), and the matching section (1204) is 10.615 mm long (A7), 10.9 mm wide (B12), 1.2 mm high, and has a corner radius of 0.75 mm. The second ridge waveguide (1202) is 2.55mm away from the first segment (B7), with a length of 7.885mm (B13) before the corner and a length of 5.885mm (A9) after the corner. The chamfer is 5.77mm and the height is also 1.8mm. The third ridge waveguide (1203) is 8.32 mm long (A10) and 1.2 mm high. The third ridge waveguide is connected to the large waveguide to the network layer radiation waveguide port (9). The large waveguide is 12.1885mm wide (B8) and 21.2mm long (A8), and is 2.17mm away from the third ridge waveguide (B14). The recessed part is 14.2mm long (A11) and 0.352mm wide. At the coaxial connection point to the ridge waveguide (1205), 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). The distance between the matching ridge waveguide and the first ridge waveguide segment of the 1-to-4 ridge waveguide is 6.6mm (B9). The first segment of the matching ridge waveguide wall is 10.37mm wide (A14) and 1.415mm long. The second segment is 16.9mm wide (A15) and 1.125mm long. The third segment is 23.95mm wide (A16) and 9.4485mm long. The distance between the coaxial probe and the end of the matching segment is 1.665mm (B12).

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

4. The antenna according to claim 1, characterized in that, The antenna radiating layer has 64 radiating slots and 16 four-in-one waveguide networks. The network layer has 16 radiating waveguide ports and 4 one-to-four ridge waveguide networks; The power feeding layer has four coaxial power feeding ports.

5. The antenna according to any one of claims 1-4, characterized in that, Each layer of the antenna plate is integrally machined from lightweight aluminum alloy.

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

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