Multi-port antenna

Abstract

The present invention discloses a multi-port antenna, comprising a main antenna unit and a secondary antenna unit, wherein the main antenna unit comprises a main reflector and a main radiation array, and the main radiation array is arranged on the top surface of the main reflector; the secondary antenna unit comprises a secondary reflector and a secondary radiation array, and the secondary radiation array is arranged on the top surface of the secondary reflector; the secondary reflector is arranged side by side with the main reflector and connected to the main reflector. The multi-port antenna disclosed in the present invention can make the overall structure of the antenna more compact and the overall performance of the antenna higher.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a multi-port antenna. Background Art

[0002] With the rapid development of communication systems, people's demand for mobile communications has been increasing. In the face of huge business surge, related communication technologies also need to keep pace with the times. Antennas, as a very important part of the communication system, are also facing increasingly severe tests. In recent years, in order to meet the needs of different operators, customers with different traffic, and communication networks of different standards, antennas and base stations have gradually improved towards multi-port and multi-band co-site.

[0003] Existing antennas usually place multiple antenna units working in a single frequency band together on a single reflector, but this will cause mutual interference between antenna systems in different frequency bands, thereby reducing the performance indicators of the antenna (such as gain, horizontal beam width and isolation). The overall performance of the multi-port antenna is poor and it cannot work well in multiple frequency bands, affecting the use effect of the antenna. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a high-performance multi-port antenna.

[0005] In order to achieve the above-mentioned purpose, one embodiment of the present invention provides a multi-port antenna, including a main antenna unit and a sub-antenna unit, wherein the main antenna unit includes a main reflector and a main radiating array, and the main radiating array is arranged on the top surface of the main reflector; the sub-antenna unit includes a sub-reflector and a sub-radiating array, and the sub-radiating array is arranged on the top surface of the sub-reflector.

[0006] The secondary reflector is arranged side by side with the primary reflector and is connected to the primary reflector.

[0007] As an improvement of the above-mentioned scheme, the main radiation array includes multiple low-frequency radiation units and multiple main high-frequency radiation units; wherein, the multiple main high-frequency radiation units each include a first high-frequency radiation unit and a second high-frequency radiation unit, the first high-frequency radiation unit is embedded in the corresponding low-frequency radiation unit, and the second high-frequency radiation unit is correspondingly provided between any two adjacent low-frequency radiation units.

[0008] As an improvement of the above solution, the secondary radiation array includes a plurality of secondary high-frequency radiation units; the plurality of secondary high-frequency radiation units are arranged on the top surface of the secondary reflection plate along the length direction of the secondary reflection plate.

[0009] As an improvement of the above-mentioned solution, main metal flanges are provided on both sides in the length direction of the main reflector; the main metal flanges extend above the top surface of the main reflector, and at least one metal protrusion is provided on the top of the main metal flange near the low-frequency radiation unit.

[0010] As an improvement of the above solution, a first metal strip is provided between each of the low-frequency radiation units and each of the main metal flanges; and a second metal strip is provided between each of the second high-frequency radiation units and each of the main metal flanges.

[0011] As an improvement of the above-mentioned scheme, a third metal strip is provided between each of the second metal strips and each of the main metal flanges; wherein, the second metal strips are vertically arranged on the top surface of the main reflector, the third metal strips are obliquely arranged on the top surface of the main reflector, and the third metal strips are inclined toward the direction of the main metal flanges.

[0012] As an improvement of the above solution, the main reflector is insulated and connected to the secondary reflector.

[0013] As an improvement of the above solution, the height difference between the highest point of the main radiation array and the highest point of the auxiliary radiation array is 10 mm to 40 mm.

[0014] As an improvement of the above solution, both sides of the secondary reflector in the length direction are provided with secondary metal flanges, and the secondary metal flanges extend upward from the top surface of the secondary reflector.

[0015] As an improvement of the above solution, at least one fourth metal strip is provided between each of the secondary metal flanges and the secondary radiation array.

[0016] The multi-port antenna provided in the embodiment of the present invention can operate in different frequency bands by arranging antenna arrays of different frequency bands on multiple reflective plates, and the overall structure is more compact and has a higher degree of integration; and different antenna units are arranged on different reflective plates, which ensures the independence of each antenna unit and reduces interference between different antenna units, thereby improving various performance indicators of the antenna in each antenna unit, such as horizontal beam width, symmetry of the radiation pattern and isolation, so that the radiation performance gain of the antenna as a whole in different frequency bands is greatly improved, the communication quality is guaranteed, and the overall performance of the antenna is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a structural schematic diagram of a multi-port antenna provided by an embodiment of the present invention;

[0019] Figure 2 is a top view of a main antenna unit of a multi-port antenna provided by an embodiment of the present invention;

[0020] Figure 3 is a top view of a multi-port antenna provided by an embodiment of the present invention;

[0021] Figure 4 It is a cross-sectional view of a multi-port antenna provided by an embodiment of the present invention.

[0022] Notes on the attached drawings:

[0023] 1. Main antenna unit; 2. Sub-antenna unit; 3. Sub-antenna unit; 10. Main reflector; 20. Sub-reflector; 30. Sub-reflector; 11. Main radiation array; 21. Sub-radiation array; 31. Sub-radiation array; 12. Main metal flange; 22. Sub-metal flange; 32. Sub-metal flange; 111. Low-frequency radiation unit; 112. Main high-frequency radiation unit; 1121. First high-frequency radiation unit; 1122. Second high-frequency radiation unit; 121. Metal protrusion; 122. Metal protrusion; 123. Metal protrusion; 1123. First metal strip; 1124. Second metal strip; 1125. Third metal strip; 211. Sub-high-frequency radiation unit; 311. Sub-high-frequency radiation unit; 212. Fourth metal strip; 312. Fourth metal strip. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside" and "outside" etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present invention.

[0026] In addition, the terms first, second, third, etc. in the specification and claims are only used for the purpose of describing the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, nor necessarily describing the order or time sequence. The terms are interchangeable where appropriate. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0027] An embodiment of the present invention provides a multi-port antenna, see Figure 1 , this figure is a structural schematic diagram of a multi-port antenna provided in an embodiment of the present invention, which includes a main antenna unit 1, a secondary antenna unit 2 and a secondary antenna unit 3 (the number of secondary antenna units in the embodiment of the present invention is preferably 2).

[0028] In the embodiment of the present invention, the main antenna unit 1 includes a main reflector 10 and a main radiating array 11, and the main radiating array 11 is arranged on the top surface of the main reflector 10; the sub-antenna unit 2 includes a sub-reflector 20 and a sub-radiating array 21, and the sub-radiating array 21 is arranged on the top surface of the sub-reflector 20; the sub-antenna unit 3 includes a sub-reflector 30 and a sub-radiating array 31, and the sub-radiating array 31 is arranged on the top surface of the sub-reflector 30; the sub-reflector 20 and the sub-reflector 30 are arranged side by side with the main reflector 10 and connected to the main reflector 10. The multi-port antenna of this embodiment divides the antenna as a whole into a main antenna unit and a sub-antenna unit, and respectively arranges them on different reflectors, so that antenna radiating arrays of different frequency bands can work in multiple different antenna systems, each system exists independently, the interference between different antenna systems is reduced, the radiation performance gain of the antenna as a whole in multiple frequency bands is greatly improved, and the structure of the antenna as a whole is more compact and the integration is higher.

[0029] Preferably, in this embodiment, see Figure 2, the figure is a top view of a main antenna unit 1 of a multi-port antenna provided by an embodiment of the present invention, the main antenna unit 1 includes a main reflector 10 and a main radiation array 11, the main radiation array 11 is arranged on the top surface of the main reflector 10, wherein the main radiation array 11 is preferably a plurality of low-frequency radiation units 111 and a plurality of main high-frequency radiation units 112, in this embodiment, the working frequency band of the main high-frequency radiation unit 112 is preferably 1710MHz to 2170MHz, and the working frequency band of the low-frequency radiation unit 111 is preferably 790 to 960MHz; the plurality of main high-frequency radiation units 112 each include a first high-frequency radiation unit 1121 and a second high-frequency radiation unit 1122, the first high-frequency radiation unit 1121 is embedded in the corresponding low-frequency radiation unit 111, and the second high-frequency radiation unit 1122 is correspondingly provided between any two adjacent low-frequency radiation units 111. In this embodiment, the number of main high-frequency radiation units 112 in the main radiation array 11 is (2*N-1) the number of low-frequency radiation units 111, and the spacing between any adjacent low-frequency radiation units 111 is twice the spacing between any adjacent main high-frequency radiation units 112. In this embodiment, the spacing between any adjacent low-frequency radiation units 111 is 250mm-280mm. By arranging radiation units of different frequency bands in a nested and staggered manner on the top surface of the main reflector, the entire main radiation array can obtain better working characteristics in different high-frequency and low-frequency bands, the gain of the main antenna unit is significantly improved, and the overall performance is greatly improved. Of course, the selection of the working frequency band of the main radiation array in the main antenna unit and the arrangement of the radiation units described above are only used as an example and should not constitute a limitation of the present invention.

[0030] Preferably, in this embodiment, see Figure 3, this figure is a structural top view of a multi-port antenna provided by an embodiment of the present invention. It should be noted that, in this embodiment, the number of sub-antenna units is preferably 2, namely sub-antenna unit 2 and sub-antenna unit 3. Sub-antenna unit 2 includes a sub-reflector 20 and a sub-radiation array 21. Sub-radiation array 21 is preferably a plurality of sub-high-frequency radiation units 211, wherein the plurality of sub-high-frequency radiation units 211 are arranged on the top surface of the sub-reflector 20 along the length direction of the sub-reflector 20; sub-antenna unit 3 includes a sub-reflector 30 and a sub-radiation array 31. Sub-radiation array 31 is preferably a plurality of sub-high-frequency radiation units 311, wherein the plurality of sub-high-frequency radiation units 311 are arranged on the top surface of the sub-reflector 30 along the length direction of the sub-reflector 30. In this embodiment, preferably, the working frequency band of the secondary high-frequency radiation unit 211 is 1710MHz to 2690MHz, and multiple secondary high-frequency radiation units 211 are arranged at equal intervals, and the spacing between any adjacent secondary high-frequency radiation units 211 is 100mm to 110mm; preferably, the working frequency band of the secondary high-frequency radiation unit 311 is 1710MHz to 2690MHz, and multiple secondary high-frequency radiation units 311 are arranged at equal intervals, and the spacing between any adjacent secondary high-frequency radiation units 311 is 100mm to 110mm. By arranging two secondary antenna units side by side with the main antenna unit, the overall integration of the multi-port antenna is higher and the structure is more compact. Multiple different secondary antenna arrays can operate at different frequency bands, ensuring that the antenna secondary radiation unit has higher performance and gain. Of course, the number of secondary antenna units, the selection of the working frequency band of the secondary radiation array, and the arrangement of the radiation units described above are only used as an example and should not constitute a limitation of the present invention.

[0031] Preferably, in this embodiment, if Figure 1As shown, the side portion in the length direction of the main reflector 10 is provided with a main metal flange 12, preferably the number of the main metal flanges 12 is 2, respectively located at the upper side portion and the lower side portion of the main reflector, each of the main metal flanges 12 extends above the top surface of the main reflector 10, and each of the main metal flanges 12 is provided with at least one metal protrusion near the top of the low-frequency radiation unit 111. In this embodiment, each of the main metal flanges 12 is provided with three metal protrusions near the top of the low-frequency radiation unit 111, namely, metal protrusion 121, metal protrusion 122 and metal protrusion 123. In this embodiment, the establishment of the metal flange can play a good isolation role, allowing different antenna unit systems to exist independently, reducing interference between different systems, and improving the overall isolation of the antenna. The multiple metal protrusions have the same or different shapes and sizes determined according to the antenna radiation characteristics, ensuring that the antenna has a good waveform radiation pattern in different frequency bands, improving the standing wave ratio and multi-order intermodulation performance indicators of the waveforms in different frequency bands, and thereby improving the overall performance of the antenna.

[0032] Preferably, in this embodiment, see Figure 2 , this figure is a schematic diagram of the structure of the main antenna unit 1 of a multi-port antenna provided in an embodiment of the present invention, wherein a first metal strip 1123 is provided between each of the low-frequency radiation units 111 and each of the main metal flanges 12; a second metal strip 1124 is provided between each of the second high-frequency radiation units 1122 and each of the main metal flanges 12. It should be noted that the size and quantity of the metal strips can be set differently according to different antenna standards and performance requirements. The establishment of metal strips can improve the isolation between the radiation units operating in different frequency bands in the main radiation array, adjust the overall radiation pattern of the main radiation array, and thereby improve the working performance of the main antenna unit.

[0033] In the above embodiments, preferably, see Figure 4, which is a cross-sectional view of a multi-port antenna provided by an embodiment of the present invention, wherein on the main reflector 10, a third metal strip 1125 is provided between each of the second metal strips 1124 and each of the main metal flanges 12; wherein the second metal strip 1124 is vertically arranged on the top surface of the main reflector 10, and the third metal strip 1125 is obliquely arranged on the top surface of the main reflector 10, and the third metal strip 1125 is inclined toward the main metal flange 12. The establishment of the third metal strip 1125 can further improve the isolation between the radiation units operating in different frequency bands in the main radiation array, reduce the coupling effect between the antenna units, and the oblique setting of the third metal strip is conducive to adjusting the overall radiation pattern of the main radiation array, further improving the working performance of the main antenna unit. Of course, the establishment direction of the metal isolation strips described above can also be in different directions according to different antenna standards and performance requirements, and this should not constitute a limitation of the present invention.

[0034] Preferably, in this embodiment, the main reflector 10 is insulated from the secondary reflector 20 and the secondary reflector 30. The insulated connection can ensure that the main antenna unit and the secondary antenna unit are independent antenna systems, and the operation of each system does not interfere with each other, thereby ensuring the overall performance of the antenna, and making the overall structure of the antenna more compact, the product has a small windward area, and is easier to install.

[0035] Preferably, in this embodiment, the height difference between the highest point of the primary radiation array and the highest point of the secondary radiation array is 10 mm to 40 mm. Figure 4 As shown, the highest point of the main radiation array 11 is the height of the low-frequency radiation unit 111, the highest point of the secondary radiation array 21 is the height of the secondary high-frequency radiation unit 211, and the highest point of the secondary radiation array 31 is the height of the secondary high-frequency radiation unit 311. In order to obtain better antenna radiation characteristics in a specific frequency band, the secondary radiation array 21 and the secondary radiation array 31 in this embodiment are symmetrical about the main radiation array 11, and the three array axes are parallel to each other, wherein the spacing between the array axes of the secondary radiation array 21 and the secondary radiation array 31 is 300mm to 400mm. The use of this distribution method of the antenna array can reduce the interference between the main radiation array and the secondary radiation array in the antenna, each has good radiation performance in different working frequency bands, improves the symmetry of the directional pattern of the secondary radiation array, and thus improves the overall performance of the antenna. Of course, the arrangement of the main and secondary radiation arrays described above is only an example, and the position of the array can also be adjusted according to different antenna standards and performance requirements, which cannot constitute a limitation of the present invention.

[0036] Preferably, in this embodiment, if Figure 1As shown, both sides of the secondary reflector 20 in the length direction are provided with secondary metal flanges 22, and the secondary metal flanges 22 extend above the top surface of the secondary reflector 20; both sides of the secondary reflector 30 in the length direction are provided with secondary metal flanges 32, and the secondary metal flanges 32 extend above the top surface of the secondary reflector 30. The establishment of the secondary metal flanges 22 and 32 can play a good isolation role for the secondary radiation array, so that different antenna unit systems exist independently, reduce interference between different systems, improve the overall isolation of the antenna, and thus improve the overall performance of the antenna.

[0037] Preferably, in this embodiment, if Figure 4 As shown, at least one fourth metal strip 212 is provided between each of the secondary metal flanges 22 and the secondary radiation array 21. Specifically, the fourth metal strips 212 are symmetrically distributed on the upper and lower sides of each of the secondary high-frequency radiation units 211; at least one fourth metal strip 312 is provided between each of the secondary metal flanges 32 and the secondary radiation array 31. Specifically, the fourth metal strips 312 are symmetrically distributed on the upper and lower sides of each of the secondary high-frequency radiation units 311. By adding metal isolation strips to the secondary reflector, the radiation units in the secondary radiation array can have better isolation, adjust the overall radiation pattern of the secondary radiation array, and improve the performance of the secondary radiation array. In this embodiment, the fourth metal strip 212 and the fourth metal strip 312 can be set in different quantities and sizes according to the different standards and performance requirements of the secondary radiation array 21 and the secondary radiation array 31 to improve the overall performance of the secondary radiation array. Of course, the above description is only an example, and the number and distribution of metal isolation strips can also be adjusted according to different requirements for the secondary antenna unit, which cannot constitute a limitation of the present invention.

[0038] The multi-port antenna described in the embodiment of the present invention has a higher overall integration and a more compact structure by arranging antenna arrays of different frequency bands on multiple reflective plates. Various performance indicators of the antenna, such as horizontal beam width, symmetry of the radiation pattern and isolation, have been greatly improved. The radiation gain of the antenna as a whole in different frequency bands has also been greatly improved, the communication quality is guaranteed, and the overall performance of the antenna is high.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A multi-port antenna, characterized in that: It includes a main antenna unit and a secondary antenna unit; The main antenna unit includes a main reflector and a main radiation array, and the main radiation array is arranged on the top surface of the main reflector; The secondary antenna unit includes a secondary reflector and a secondary radiating array, and the secondary radiating array is arranged on the top surface of the secondary reflector; The secondary reflector is arranged side by side with the primary reflector and is connected to the primary reflector; The main reflector is insulated and connected to the secondary reflector; The main radiation array includes a plurality of low-frequency radiation units and a plurality of main high-frequency radiation units; wherein the plurality of main high-frequency radiation units each include a first high-frequency radiation unit and a second high-frequency radiation unit, the first high-frequency radiation unit is embedded in the corresponding low-frequency radiation unit, and the second high-frequency radiation unit is correspondingly provided between any two adjacent low-frequency radiation units; Both sides of the main reflector in the length direction are provided with main metal flanges; the main metal flanges extend above the top surface of the main reflector, and at least one metal protrusion is provided on the top of the main metal flange close to the low-frequency radiation unit; a first metal strip is provided between each of the low-frequency radiation units and each of the main metal flanges; a second metal strip is provided between each of the second high-frequency radiation units and each of the main metal flanges; A third metal strip is provided between each of the second metal strips and each of the main metal flanges; wherein the second metal strips are vertically arranged on the top surface of the main reflector, the third metal strips are obliquely arranged on the top surface of the main reflector, and the third metal strips are inclined toward the direction of the main metal flanges.

2. The multi-port antenna according to claim 1, characterized in that: The secondary radiation array includes a plurality of secondary high-frequency radiation units; the plurality of secondary high-frequency radiation units are arranged on the top surface of the secondary reflection plate along the length direction of the secondary reflection plate.

3. The multi-port antenna according to claim 1, characterized in that: The height difference between the highest point of the main radiation array and the highest point of the auxiliary radiation array is 10 mm to 40 mm.

4. The multi-port antenna according to claim 1, characterized in that: Auxiliary metal flanges are provided on both sides of the auxiliary reflector in the length direction, and the auxiliary metal flanges extend upward from the top surface of the auxiliary reflector.

5. The multi-port antenna according to claim 4, characterized in that: At least one fourth metal strip is provided between each of the secondary metal flanges and the secondary radiation array.

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