Novel low-frequency radiation unit

Abstract

The utility model discloses a novel low-frequency radiation unit, which comprises a base and four groups of balun arms arranged in pairs, the four groups of balun arms are arranged on the base in an annular array, and each group of balun arms is connected with a dipole formed by two radiation arms to form a certain polarized radiator; the antenna further comprises a plurality of first coupling structures, a plurality of second coupling structures and a plurality of feed structures, the number of the first coupling structures, the number of the second coupling structures and the number of the feed structures are equal to the number of the dipoles, the two adjacent radiation arms belonging to the same dipole are connected through the first coupling structures, and the two adjacent radiation arms belonging to the same dipole are connected through the second coupling structures. The two adjacent radiation arms which do not belong to the same dipole are connected through a second coupling structure, and the two balun arms in each group are connected through a feed structure. The utility model has the advantages that the installation is convenient, the installation cost is reduced, and the broadband of directional diagrams and S parameters is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of communication base station antennas, in particular to a novel low-frequency radiation unit. Background Art

[0002] In recent years, with the development of 5G mobile communications, the demand for base station antennas has shown a new trend. From a cost perspective, antenna resources are becoming increasingly scarce, and traditional macro station construction is becoming increasingly difficult. Miniaturized fusion antennas are becoming more and more popular with operators. Bowl-shaped units can integrate low-frequency and medium-frequency radiation units into one to achieve a common aperture. Base station antennas based on this technology can achieve array coverage of different frequencies within the same aperture, which improves integration, greatly improves antenna resource utilization, and reduces station construction costs. At present, traditional common-aperture bowl-mounted units have the following disadvantages: First, the feeder cascade connection point of the same polarization is located on the outside of the radiation unit, which is a separate part. The non-integrated design not only makes the assembly process more complicated, but also makes the assembly cost higher. Second, the S parameter and directional pattern matching is difficult, and it is difficult to achieve broadband. Utility Model Content

[0003] The utility model aims to provide a novel low-frequency radiation unit which is easy to install, reduces installation cost and realizes broadband of directional diagram and S parameter.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a novel low-frequency radiation unit, comprising a base, four groups of balun arms arranged in pairs, the four groups of balun arms are arranged on the base in a ring array, and each group of the balun arms is connected to a dipole composed of two radiation arms to form a radiator of a certain polarization; it also includes a plurality of first coupling structures, a plurality of second coupling structures, and a plurality of feeding structures, the number of the first coupling structures, the second coupling structures, and the feeding structures is equal to the number of the dipoles, wherein two adjacent radiation arms belonging to the same dipole are connected by the first coupling structure, two adjacent radiation arms not belonging to the same dipole are connected by the second coupling structure, and the two balun arms in each group are connected by the feeding structure.

[0006] Furthermore, the first coupling structure includes a first medium and a first metal sheet, the first medium is mounted on the first metal sheet, and two adjacent radiation arms belonging to the same dipole are connected through the first medium.

[0007] Furthermore, the second coupling structure includes a second medium and a second metal sheet, the second metal sheet is mounted on the second medium, and two adjacent radiation arms that do not belong to the same dipole are connected through the second medium.

[0008] Furthermore, the base includes a fixing seat and a circular boss, the boss is sleeved in the fixing seat, the balun arm is installed on the fixing seat with an outward tilt, and the boss is provided with at least one first side hole position for fixing the intermediate frequency radiator and at least one second side hole position for fixing the reflector.

[0009] Furthermore, the two radiators with the same polarization are connected via a feeder structure, which includes a cascade matching structure and two cascade feeders, and the cascade matching structure is respectively connected to two feeding structures on the radiator with the same polarization via the two cascade feeders.

[0010] Furthermore, the cascade matching structure includes a hollow tube, which is fixedly arranged on a fixing seat, and a metal core wire is fixedly sleeved in the hollow tube to form a coaxial line structure, and the metal core wire is connected to the cascade feeder.

[0011] Furthermore, the feeding point of the feeding structure is located at any position on the balun arm.

[0012] Furthermore, the two radiating arms of each dipole are orthogonal to each other, and the other ends of the two radiating arms are open circuits in the form of straight lines or bent forms.

[0013] Furthermore, each of the feeding structures and each of the cascade feed lines adopts a form including a coaxial line and a microstrip line.

[0014] Furthermore, the first metal sheet and the second metal sheet are planar or three-dimensional structures.

[0015] Due to the adoption of the above structure, the utility model has the following beneficial effects:

[0016] The utility model reduces the installation cost of the utility model and improves the installation convenience of the utility model by setting an integrated feeding structure; because the caliber of the bowl-shaped vibrator of the utility model is much smaller than that of the conventional vibrator in the same frequency band, the installation cost of the utility model is low and it is easier to install. In addition, the utility model also realizes broadband directional pattern and broadband S parameter by setting the first coupling structure and the second coupling structure.

[0017] The present invention will become more clear through the following description in conjunction with the accompanying drawings, which are used to explain the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a top view of the utility model;

[0021] Figure 3 It is a bottom view of the utility model;

[0022] Figure 4 It is a specific structural diagram of the cascade matching structure of the utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Please refer to Figures 1 to 4The utility model provides a novel low-frequency radiation unit, comprising a base 01, four groups of balun arms 02 arranged in pairs, the four groups of balun arms 02 are arranged in a ring array on the base 01, and each group of the balun arms 02 is connected to a dipole 03 composed of two radiation arms 03a to form a radiator of a certain polarization; it also includes a plurality of first coupling structures 04, a plurality of second coupling structures 05, and a plurality of feeding structures 06, the number of the first coupling structures 04, the second coupling structures 05, and the feeding structures 06 are all equal to the number of the dipoles 03, wherein two adjacent radiation arms 03a belonging to the same dipole 03 are connected through the first coupling structure 04, two adjacent radiation arms 03a not belonging to the same dipole 03 are connected through the second coupling structure 05, and the two balun arms 02 of each group are connected through the feeding structure 06. The utility model reduces the installation cost of the utility model and improves the installation convenience of the utility model by setting an integrated feeding structure 06; because the diameter of the bowl-shaped vibrator of the utility model is much smaller than that of the conventional vibrator in the same frequency band, the installation cost of the utility model is low and it is easier to install. In addition, the utility model realizes broadband directional pattern and broadband S parameter by setting the first coupling structure 04 and the second coupling structure 05.

[0025] In the present invention, the first coupling structure 04 includes a first medium 04a and a first metal sheet 04b, the first medium 04a is mounted on the first metal sheet 04b, and two adjacent radiation arms 03a belonging to the same dipole 03 are connected through the first medium 04a. By setting the first medium 04a and the first metal sheet 04b, broadband radiation patterns and broadband S parameters are achieved.

[0026] In the present invention, the second coupling structure 05 includes a second medium 05a and a second metal sheet 05b, the second metal sheet 05b is mounted on the second medium 05a, and two adjacent radiation arms 03a that do not belong to the same dipole 03 are connected through the second medium 05a. By setting the second medium 05a and the second metal sheet 05b, broadband radiation patterns and broadband S parameters are achieved.

[0027] In the utility model, the base 01 includes a fixing seat 01a and a circular boss 01b, the boss 01b is sleeved in the fixing seat 01a, the balun arm 02 is installed on the fixing seat 01a with an outward tilt, and the boss 01b is provided with at least one first side hole position 07 for fixing the intermediate frequency radiator and at least one second side hole position 08 for fixing the reflector.

[0028] In the utility model, the two radiators with the same polarization are connected via a feeder structure 09, and the feeder structure 09 includes a cascade matching structure 09a and two cascade feed lines 09b. The cascade matching structure 09a is respectively connected to the two feeding structures 06 on the radiator with the same polarization via the two cascade feed lines 09b.

[0029] In the present invention, the cascade matching structure 09a includes a hollow tube, which is fixedly arranged on the fixing seat 01a, and a metal core wire 10 is fixedly sleeved in the hollow tube to form a coaxial line structure, and the metal core wire 10 is connected to the cascade feeder 09b. The feed structure 06 of the present invention is composed of the feeder structure 09 and the metal core wire 10, thereby realizing an integrated design of the feed structure 06, improving the installation convenience of the present invention, and reducing the workload of the assembly and welding process and the types of materials required, thereby reducing the installation cost.

[0030] In the present invention, the feeding point of the feeding structure 06 is located at any position on the balun arm 02. The present invention achieves broadband directivity and broadband S parameters by changing the feeding point position of the feeding structure 06 on the balun arm 02 and setting a coupling structure on the balun arm 02.

[0031] In the present invention, the two radiation arms 03a of each of the dipoles 03 are orthogonal to each other, and the other ends of the two radiation arms 03a are open circuits in the form of straight lines or bent forms.

[0032] In the present invention, each of the feeding structures 06 and each of the cascade feed lines 09b adopts a coaxial line or a microstrip line.

[0033] In the present invention, the first metal sheet 04b and the second metal sheet 05b are planar or three-dimensional structures.

[0034] The feeding structure 06 of the utility model is composed of a feeder structure 09 and a metal core wire 10, which realizes an integrated design of the feeding connection structure 06, reduces the workload of the assembly and welding process and the types of materials required, thereby reducing the installation cost of the utility model and improving the installation convenience of the utility model; the utility model also realizes broadbandization of the directional diagram and broadbandization of the S parameter by setting the first coupling structure 04 and the second coupling structure 05 and changing the feeding point position of the feeding structure 06 on the balun arm 02. In addition, because the caliber of the bowl-shaped vibrator of the utility model is much smaller than that of the conventional vibrator of the same frequency band, the installation cost of the utility model is low and it is easier to install.

[0035] The above describes the preferred embodiments of the utility model. It should be understood that the utility model is not limited to the above-mentioned specific implementation methods, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the utility model without departing from the scope of the technical solution of the utility model, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A novel low-frequency radiation unit, comprising a base (01), four groups of balun arms (02) arranged in pairs, wherein the four groups of balun arms (02) are arranged on the base (01) in a circular array, and each group of the balun arms (02) is connected to a dipole (03) composed of two radiation arms (03a) to form a radiator of a certain polarization; characterized in that: It also includes a plurality of first coupling structures (04), a plurality of second coupling structures (05), and a plurality of feeding structures (06), wherein the number of the first coupling structures (04), the second coupling structures (05), and the feeding structures (06) are all equal to the number of the dipoles (03), wherein two adjacent radiation arms (03a) belonging to the same dipole (03) are connected via the first coupling structure (04), and two adjacent radiation arms (03a) not belonging to the same dipole (03) are connected via the second coupling structure (05), and the two balun arms (02) in each group are connected via the feeding structure (06).

2. A novel low-frequency radiation unit according to claim 1, characterized in that: The first coupling structure (04) comprises a first medium (04a) and a first metal sheet (04b), wherein the first medium (04a) is mounted on the first metal sheet (04b), and two adjacent radiation arms (03a) belonging to the same dipole (03) are connected via the first medium (04a).

3. A novel low-frequency radiation unit according to claim 2, characterized in that: The second coupling structure (05) comprises a second medium (05a) and a second metal sheet (05b), wherein the second metal sheet (05b) is mounted on the second medium (05a), and two adjacent radiation arms (03a) that do not belong to the same dipole (03) are connected via the second medium (05a).

4. A novel low-frequency radiation unit according to claim 3, characterized in that: The base (01) comprises a fixing seat (01a) and a circular boss (01b), wherein the boss (01b) is sleeved in the fixing seat (01a), the balun arm (02) is installed on the fixing seat (01a) in an outwardly inclined manner, and the boss (01b) is provided with at least one first side hole position (07) for fixing an intermediate frequency radiator and at least one second side hole position (08) for fixing a reflection plate.

5. A novel low-frequency radiation unit according to claim 4, characterized in that: The two radiators with the same polarization are connected via a feeder structure (09), wherein the feeder structure (09) comprises a cascade matching structure (09a) and two cascade feeders (09b), and the cascade matching structure (09a) is respectively connected to two feeding structures (06) on the radiator with the same polarization via the two cascade feeders (09b).

6. A novel low-frequency radiation unit according to claim 5, characterized in that: The cascade matching structure (09a) comprises a hollow tube, which is fixedly arranged on a fixing seat (01a), and a metal core wire (10) is fixedly sleeved in the hollow tube to form a coaxial line structure, and the metal core wire (10) is connected to the cascade feeder (09b).

7. A novel low-frequency radiation unit according to claim 5, characterized in that: The feeding point of the feeding structure (06) is located at any position on the balun arm (02).

8. A novel low-frequency radiation unit according to claim 6, characterized in that: The two radiation arms (03a) of each dipole (03) are orthogonal to each other, and the other ends of the two radiation arms (03a) are open circuits in the form of straight lines or bent forms.

9. A novel low-frequency radiation unit according to claim 7, characterized in that: Each of the feeding structures (06) and each of the cascade feed lines (09b) are in the form of coaxial lines and microstrip lines.

10. A novel low-frequency radiation unit according to any one of claims 2 to 8, characterized in that: The first metal sheet (04b) and the second metal sheet (05b) are planar or three-dimensional structures.

Images