A bidirectional lens antenna and multi-channel implementation method thereof

Abstract

The present invention provides a bidirectional lens antenna and a multi-channel implementation method thereof, the antenna comprising antenna group 1, antenna group 2, a fixing mechanism and a waveguide, the antenna group 1 and the antenna group 2 are centrally symmetrically arranged, and both include a lens and a feed source, the lens is a spindle-shaped structure with a small diameter at both ends and a large diameter in the middle, the feed sources of the antenna group 1 and the antenna group 2 are arranged between the lenses of the antenna group 1 and the antenna group 2, and the signal transmission directions of the two feed sources are opposite; the fixing mechanism is used to install the lens, the feed source and connect the antenna group 1 and the antenna group 2; the waveguide sleeve is arranged outside the lens of the antenna group 1 and the antenna group 2, and is arranged with a gap between the lenses, and shields covering the lenses are also provided at both ends of the waveguide. The present invention can achieve multi-channel bidirectional coverage, and has the performance of low wind resistance, high gain, high directional pattern consistency, high aperture surface efficiency, etc.; and has low material requirements and is easy to implement; it is easy to assemble, low cost, and easy to mass produce.

Description

Technical Field

[0001] The present invention relates to the technical field of communication antennas, and in particular to a bidirectional lens antenna. The present invention also relates to a multi-channel implementation method for the bidirectional lens antenna. Background Art

[0002] After the development from 2G to 5G, as the coverage of macro-station mobile network signals has gradually improved, the focus of mobile network construction has gradually shifted to micro-scene coverage and special scenes that macro-stations cannot cover. Among them, the mobile network coverage in the tunnel is affected by high-speed moving vehicles. In addition, due to the narrow tube effect in the tunnel itself, the antenna part of the mobile network coverage project is subjected to super strong wind loads, which seriously affects the safety of the project.

[0003] At present, in order to ensure the safety of the project, the 5G network coverage in the tunnel is most often covered by leaky cable (CN 112600595A). Due to the uneven energy distribution of the leaky cable coverage solution, a leaky cable can only achieve single polarization signal coverage and cannot achieve multiple inputs and outputs, resulting in unsatisfactory signal coverage in the tunnel. In some 5G network construction projects in tunnels, logarithmic periodic antennas (CN 104518279 A / CN 212462004 U / CN 209526214 U) are also used. Since only some of the oscillators in the radiation zone of the logarithmic periodic antenna play a major role in radiation, and not all oscillators make an important contribution to radiation, its beam width is wide and its directivity is not strong. The directivity coefficient can generally only reach about 10dBi. While the use of plate antenna (CN 208539093 U) beamforming coverage improves gain, the increase in the windward area of ​​the antenna seriously affects the safety of the project.

[0004] At the same time, in the antenna coverage solution, since the cost of antennas and mobile communication equipment (BBU+RRU) is high, achieving two-way coverage at the same site is conducive to saving engineering costs. At present, two-way coverage is usually achieved by combining antennas in two directions into one port through a power divider to connect to the mobile communication device end (CN 208539093 U), or by forming a two-way radiation unit through parallel dipoles to connect to the mobile communication device (CN 104518279 A). When the antenna can achieve dual polarization, a maximum of 2T2R two-way signal coverage can be achieved.

[0005] None of the above solutions can truly achieve the 4T4R two-way coverage required by 5G mobile communications. Therefore, a low wind resistance, 4T4R two-way coverage antenna has become the key to the 5G network construction needs in tunnel scenarios. Summary of the invention

[0006] The present invention aims to provide a bidirectional lens antenna to overcome the deficiencies in the prior art.

[0007] To solve the above technical problems, the technical solution of the present invention is: a bidirectional lens antenna, comprising an antenna group one, an antenna group two, a fixing mechanism and a waveguide, the antenna group one and the antenna group two are arranged symmetrically with respect to the center, and both include a lens and a feed source, the lens is a spindle-shaped structure with a small diameter at both ends and a large diameter in the middle, the feed sources of the antenna group one and the antenna group two are arranged between the lenses of the antenna group one and the antenna group two, and the signal transmission directions of the two feed sources are opposite; the fixing mechanism is used to install the lens, the feed source and connect the antenna group one and the antenna group two; the waveguide sleeve is arranged outside the lenses of the antenna group one and the antenna group two, and is arranged with a gap between the lenses, and protective covers covering the lenses are also provided at both ends of the waveguide, and the protective covers are connected to the waveguide by screws or sealant.

[0008] Furthermore, in the above-mentioned bidirectional lens antenna, the lens includes two cones with different lengths, wherein the short cone is arranged toward the feed source.

[0009] Furthermore, in the above-mentioned bidirectional lens antenna, the lens is composed of a single dielectric material.

[0010] Furthermore, in the above-mentioned bidirectional lens antenna, the dielectric constant of the dielectric material is 2.0-3.0.

[0011] Furthermore, in the above-mentioned bidirectional lens antenna, the waveguide is made of metal material, and the waveguide is a round-edge waveguide, a square waveguide or a rectangular waveguide.

[0012] Furthermore, in the above-mentioned bidirectional lens antenna, the feed source is composed of a single vibrator or a unit array.

[0013] Furthermore, in the above-mentioned bidirectional lens antenna, the fixing mechanism includes a mounting member 1 for mounting antenna group 1 and a mounting member 2 for mounting antenna group 2, the mounting member 1 and the mounting member 2 are support members or plastic clips, and the lens and feed source are connected to the fixing mechanism by screws or rivets.

[0014] Furthermore, in the above-mentioned bidirectional lens antenna, the fixing mechanism also includes a connecting piece connecting the first mounting piece and the second mounting piece, the connecting piece is a cage-shaped structure, and the lead end of the feed source is fixed on the connecting piece.

[0015] Furthermore, the above-mentioned bidirectional lens antenna also includes a mounting seat, which is sleeved on the outside of the waveguide and clamped to the waveguide.

[0016] The present invention also provides a multi-channel implementation method based on the above-mentioned bidirectional lens antenna, including: polarization one and polarization two of each feed source are electrically connected to the two input ends of the orthogonal coupler respectively, the two output ends of the orthogonal coupler generate two bidirectional beam signals, the feed sources of antenna group one and antenna group two generate four bidirectional beam signals, and the four bidirectional beam signals are respectively connected to the four channels of the RRU to realize the 4T4R multi-channel bidirectional coverage antenna.

[0017] Compared with the prior art, the invention has the following beneficial effects: the dual-lens antenna of the invention can achieve multi-channel bidirectional coverage, has low wind resistance, high gain, high directivity, and can achieve high Figure 1 It has the following properties: high consistency, high aperture surface efficiency, etc.; it has low material requirements and is easy to implement; it is easy to assemble, low cost, and easy to mass produce. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the bidirectional lens antenna of the present invention;

[0020] Figure 2 A top view of the bidirectional lens antenna of the present invention;

[0021] Figure 3 It is an exploded schematic diagram of the bidirectional lens antenna of the present invention;

[0022] Figure 4 It is a partial schematic diagram of the bidirectional lens antenna of the present invention;

[0023] Figure 5 for Figure 4 Explosion diagram of

[0024] Figure 6 It is an exploded schematic diagram of the connection between the antenna group and the fixing mechanism of the bidirectional lens antenna of the present invention;

[0025] Figure 7 It is a beam synthesis logic diagram of the bidirectional lens antenna of the present invention;

[0026] In the figure: 10, antenna group 1; 20, antenna group 2;

[0027] 1. Waveguide; 2. Lens; 3. Feed source; 4. Protective cover; 5. Mounting part 1; 6. Mounting part 2; 7. Connector; 8. Mounting base. DETAILED DESCRIPTION

[0028] 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.

[0029] Example 1

[0030] like Figure 1-6 As shown, a bidirectional lens antenna includes an antenna group 10, an antenna group 20, a fixing mechanism and a waveguide 1. The antenna group 1 and the antenna group 2 are centrally symmetrically arranged, and both include a lens 2 and a feed source 3. The lens 2 is a spindle-shaped structure with small diameters at both ends and a large diameter in the middle. The feed sources 3 of the antenna group 10 and the antenna group 20 are arranged between the lenses 2 of the antenna group 10 and the antenna group 20, and the two feed sources 3 are placed in a mirror image relative to the center of the antenna, and the signal transmission directions of the two are opposite; the fixing mechanism is used to Install lens 2 and feed source 3 and connect antenna group 1 10 and antenna group 2 20; the waveguide 1 is sleeved outside the lens 2 of antenna group 1 10 and antenna group 2 20, and a gap is set between the lens 2. The spacing between the waveguide 1 and the lens 2 can be maintained by setting a fixing mechanism, and shields 4 covering the lens 2 are also provided at both ends of the waveguide 1. The shield 4 covers the end of the lens 2 that is exposed from the waveguide 1 and is combined with the waveguide 1 to form a closed shell. The shield 4 is connected to the waveguide 1 by screws or sealant, and has a simple structure and is easy to disassemble and assemble. The lens 2 adopts a spindle-shaped structure with high gain and high directivity. Figure 1 The two ends of the lens 2 are tapered, with a small windward area and low wind resistance. The bidirectional lens antenna of the present invention has a simple overall structure, is easy to assemble, has low cost, and is easy to mass produce.

[0031] Among them, Figure 6 As shown, the lens 2 includes two cones of different lengths, wherein the short cone is arranged toward the feed source 3. This arrangement is beneficial to the convergence of the beam, improves the beam directivity, and achieves higher gain performance.

[0032] like Figure 1-2 As shown, the bidirectional lens antenna described in the present invention also includes a mounting seat 8, through which the antenna is fixed. The mounting seat 8 is sleeved on the outside of the waveguide 1 and is clamped and connected to the waveguide 1. The mounting seat 8 is provided with a split annular clamp connected to the waveguide 1, which is easy to disassemble and assemble.

[0033] Example 2

[0034] Based on the structure of Example 1, the lens 2 is composed of a single dielectric material, that is, the medium of the entire lens is the same dielectric material, which has low material requirements, is convenient to manufacture, and is easy to implement; the dielectric constant of the dielectric material is 2.0-3.0, and a dielectric material with a dielectric constant of 2.0 is preferred.

[0035] like Figure 1-3 As shown, the waveguide 1 is made of metal material, and the waveguide 1 is a round-edge waveguide, a square waveguide or a rectangular waveguide, but is not limited thereto. This embodiment adopts a round-edge waveguide.

[0036] like Figure 3-6 As shown, the feed source 3 is composed of a single vibrator or a unit array. This embodiment adopts a feed source composed of a single vibrator, and two feed sources are placed in a mirror image relative to the center of the antenna.

[0037] like Figure 3-6 As shown, the fixing mechanism includes a mounting piece 1 5 for mounting antenna group 1 10 and a mounting piece 2 6 for mounting antenna group 2 20. The mounting piece 1 5 and the mounting piece 2 6 are support members or plastic clamps. In this embodiment, a cylindrical support member is used. The lens 2 and the feed source 3 are connected to the fixing mechanism by screws or rivets, which are convenient for disassembly and assembly. The spacing between the waveguide 1 and the lens 2 can be maintained by the mounting piece 1 5 and the mounting piece 2 6. The fixing mechanism also includes a connector 7 connecting the mounting piece 1 5 and the mounting piece 2 6, so that the overall structure of the antenna is more stable. The connector 7 is a cage-shaped structure, which is convenient for the lead wire to pass through. The lead wire end of the feed source 3 is fixed on the connector 7, and the other end of the lead wire passes through the lead wire cover on the waveguide 1 and extends to the outside of the waveguide.

[0038] like Figure 7 As shown, the present invention also provides a multi-channel implementation method based on the above-mentioned bidirectional lens antenna, including: polarization one and polarization two of each feed source 3 are electrically connected to the two input ends of the orthogonal coupler respectively, and the two output ends of the orthogonal coupler generate two bidirectional beam signals, and the feed sources 3 of antenna group one 10 and antenna group two 20 can generate four bidirectional beam signals, and the four bidirectional beam signals are respectively connected to the four channels of the RRU to realize the 4T4R multi-channel bidirectional coverage antenna.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A bidirectional lens antenna, characterized in that: It includes antenna group 1, antenna group 2, a fixing mechanism and a waveguide. The antenna group 1 and the antenna group 2 are arranged symmetrically with respect to the center, and both include lenses and feed sources. The lenses are spindle-shaped structures with small diameters at both ends and a large diameter in the middle. The feed sources of the antenna group 1 and the antenna group 2 are arranged between the lenses of the antenna group 1 and the antenna group 2, and the signal transmission directions of the two feed sources are opposite. The fixing mechanism is used to install the lens and the feed source and connect the antenna group 1 and the antenna group 2. The waveguide sleeve is arranged outside the lenses of the antenna group 1 and the antenna group 2, and a gap is set with the lenses. Protective covers covering the lenses are also provided at both ends of the waveguide, and the protective covers are connected to the waveguide through screws or sealant.

2. The bidirectional lens antenna according to claim 1, characterized in that: The lens includes two cones with different lengths, wherein the short cone is arranged toward the feed source.

3. The bidirectional lens antenna according to claim 1 or 2, characterized in that: The lens is composed of a single dielectric material.

4. The bidirectional lens antenna according to claim 3, characterized in that: The dielectric constant of the dielectric material is 2.0-3.

0.

5. The bidirectional lens antenna according to claim 1, characterized in that: The waveguide is made of metal material, and the waveguide is a round-edge waveguide, a square waveguide or a rectangular waveguide.

6. The bidirectional lens antenna according to claim 1, characterized in that: The feed source is composed of a single vibrator or a unit array.

7. The bidirectional lens antenna according to claim 1, characterized in that: The fixing mechanism includes a mounting member 1 for mounting antenna group 1 and a mounting member 2 for mounting antenna group 2. The mounting member 1 and the mounting member 2 are support members or plastic clips. The lens and the feed source are connected to the fixing mechanism by screws or rivets.

8. The bidirectional lens antenna according to claim 7, characterized in that: The fixing mechanism also includes a connecting piece connecting the first mounting piece and the second mounting piece. The connecting piece is a cage-shaped structure, and the lead end of the feed source is fixed on the connecting piece.

9. The bidirectional lens antenna according to claim 1, characterized in that: The utility model also comprises a mounting seat, wherein the mounting seat is sleeved on the outside of the waveguide and is clamped and connected with the waveguide.

10. The multi-channel implementation method of the bidirectional lens antenna according to any one of claims 1 to 9, characterized in that: include: Polarization 1 and polarization 2 of each feed source are electrically connected to the two input ends of the orthogonal coupler respectively, and the two output ends of the orthogonal coupler generate two bidirectional beam signals. The feed sources of antenna group 1 and antenna group 2 generate four bidirectional beam signals, which are respectively connected to the four channels of the RRU to realize the 4T4R multi-channel bidirectional coverage antenna.

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