Ultra-wideband base station antenna

Abstract

The present application provides an ultra-wideband base station antenna, comprising a radiating plate, a supporting plate, and a bottom plate, wherein the supporting plate connects the radiating plate and the bottom plate, and a feed balun is provided on the supporting plate; a feed circuit is provided on the bottom plate, and a main radiating plate, a coupling plate, and a metal via are provided on the radiating plate, wherein the coupling plate is arranged parallel to the main radiating plate, and the main radiating plate is respectively connected to the coupling plate and the feed balun through metal vias, and the feed balun is connected to the feed circuit. The base station antenna is electromagnetically coupled with the coupling balun through the main radiating plate to generate a first-order resonance in a lower frequency band, which is suitable for 4G network communications. The coupling plate is connected to the main radiating plate through metal vias and electromagnetically coupled to generate a second-order resonance in a high frequency band, which is suitable for 5G network communications. The coupling plate is connected to the feed circuit on the base through the feed balun, and the coupled balun feeding method is used to obtain a network with a wider bandwidth, which can simultaneously cover the 4G and 5G network frequency bands.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an ultra-wideband base station antenna. Background Art

[0002] Currently, 4G networks are widely used for network communications. Theoretically, 4G communication speeds can only reach a maximum of 100Mbps, which is no longer able to meet user demands for network speed. To meet these demands, 4G networks will gradually be replaced by 5G networks. The commercialization of 5G networks requires the early deployment of network base stations that support 5G network operations. Due to the technical characteristics of 5G networks, standalone networking requires that 5G base station antennas be deployed to achieve a certain degree of continuous signal coverage to effectively guarantee 5G user services.

[0003] In the initial deployment of 5G network base station antennas, in order to adapt to the transition from 4G network to 5G network, the communication network is still mainly based on non-independent networking. On the basis of utilizing existing 4G network equipment, 5G network base stations are deployed to enable users to use 4G core network, 4G wireless network and 5G wireless network at the same time, that is, 5G and 4G LTE (Long Term Evolution) joint networking.

[0004] During the transition period of 5G network promotion, the communication network needs to cover both 4G and 5G network frequency bands. The 4G network frequency band is between 2300 and 2700 MHz, while the 5G network frequency band is between 3300 and 5000 MHz. Therefore, the base station antenna needs to provide a communication network with a wider network frequency band (such as 2300 MHz to 5000 MHz). Currently, 4G base station antennas can only provide a single low-frequency band communication network and cannot provide services for 5G networks. Separately designed 5G base station antennas can only provide a single high-frequency band communication network. During the commercial promotion of 5G networks, it is impossible to simultaneously meet users' network needs for 4G and 5G. If 4G and 5G base station antennas are deployed at the same time, the equipment space occupied by the base station antenna will increase.

[0005] In the process of promoting the commercialization of 5G networks, in order to solve the problem of wide frequency band requirements of communication networks, how to design a base station antenna that can cover both 4G and 5G network bands is a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the Invention

[0006] This application provides an ultra-wideband base station antenna to solve the problem of wider communication network frequency band requirements during the promotion of 5G networks.

[0007] The present application provides an ultra-wideband base station antenna, comprising a radiating plate, a supporting plate, and a bottom plate, wherein the supporting plate is connected to the radiating plate and the bottom plate; a main radiating plate, a coupling plate, and a metal via are provided on the radiating plate; the supporting plate comprises a feeding balun, and the bottom plate comprises a feeding circuit;

[0008] The coupling plate and the main radiating plate are arranged parallel to each other. The main radiating plate is connected to the coupling plate and the feeding balun respectively through metal vias. The main radiating plate is used to generate the first-order resonance, and the coupling plate is used to generate the second-order resonance; the coupling plate is connected to the feeding circuit through the feeding balun.

[0009] Optionally, two coaxial signal lines and a ground pad are also provided on the base plate; the inner core of one end of the coaxial signal line is connected to the feed circuit, the outer core is connected to the ground pad, and the other end of the coaxial signal line is connected to the excitation source, which is used to provide excitation current.

[0010] Optionally, the main radiating plate is electromagnetically coupled with the feeding balun to generate a first-level resonance, and the frequency band of the first-level resonance meets the requirements of the 4G network; the coupling plate is electromagnetically coupled with the main radiating plate to generate a second-level resonance, and the frequency band of the second-level resonance meets the requirements of the 5G network.

[0011] Optionally, the main radiation plate includes a first dipole pair and a second dipole pair; the first dipole pair and the second dipole pair are cross-arranged; the first dipole pair and the second dipole pair are respectively provided with two half-wave dipole arms, and the half-wave dipole arms are provided with slot-shaped openings.

[0012] Optionally, the coupling plate includes a first coupling vibrator pair and a second coupling vibrator pair; the first coupling vibrator pair and the second coupling vibrator pair are arranged crosswise; the first coupling vibrator pair and the second coupling vibrator pair are respectively provided with two coupling vibrator arms, and the coupling vibrator arms are provided with strip openings.

[0013] Optionally, the main radiation piece and the coupling piece are metal radiation pieces laser-coated on the radiation board.

[0014] Optionally, the radiation plate is an injection-molded plastic part.

[0015] Optionally, the support plate includes two cross-arranged plastic plates.

[0016] Optionally, the base station antenna further includes a reflector; the reflector is connected to the bottom plate.

[0017] Optionally, the reflective plate is a horn-shaped structure, the reflective plate is a horn-shaped structure, the horn-shaped opening direction is the same as the radiation direction of the radiation plate, and the reflective plate has a U-shaped, Z-shaped or sawtooth-shaped flange.

[0018] The ultra-wideband base station antenna provided in the present application includes a radiating plate, a supporting plate, a bottom plate and a reflecting plate, the supporting plate connects the radiating plate and the bottom plate, and the bottom plate is arranged on the reflecting plate; a feeding balun is arranged on the supporting plate; a main radiating plate, a coupling plate and a metal via are arranged on the radiating plate, the coupling plate is arranged parallel to the main radiating plate, the main radiating plate is respectively connected to the coupling plate and the feeding balun through the metal via, the main radiating plate is used to generate a first-order resonance, and the coupling plate is used to generate a second-order resonance, and the frequency band of the first-order resonance is lower than the frequency band of the second-order resonance; the coupling plate is connected to the feeding circuit through the feeding balun.

[0019] The base station antenna also includes a reflector plate, the bottom plate is arranged on the reflector plate, the reflector plate is a horn-shaped structure, the horn-shaped opening direction is the same as the radiation direction of the radiation plate, and the reflector plate has a U-shaped, Z-shaped or sawtooth-shaped flange.

[0020] The base station antenna uses electromagnetic coupling between the main radiating plate and the coupling balun to generate a first-order resonance in the lower frequency band, suitable for 4G network communications. The coupling plate is connected to the main radiating plate through metal vias for electromagnetic coupling, generating a second-order resonance in the higher frequency band, suitable for 5G network communications. The coupling plate is connected to the feed circuit through the feed balun, and the coupled balun feeding method is used to obtain a wider bandwidth network. This provides a base station antenna that can cover both 4G and 5G network bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of a base station antenna;

[0023] Figure 2 This is a schematic diagram of the overall structure of a radiation plate of a base station antenna;

[0024] Figure 3 Schematic diagram of a top view of a radiating plate of a base station antenna;

[0025] Figure 4 A bottom-up schematic diagram of a radiating plate of a base station antenna;

[0026] Figure 5 Schematic diagram of a base station antenna bottom plate viewed from above;

[0027] Figure 6 A front view schematic diagram of a support plate of a base station antenna;

[0028] Figure 7 A rear view schematic diagram of a base station antenna support plate;

[0029] Figure 8 A left-side schematic diagram of a base station antenna support plate;

[0030] Figure 9 A schematic diagram of a right side view of a support plate of a base station antenna;

[0031] Figure 10 This is a schematic diagram of the support plate structure of a base station antenna;

[0032] Figure 11 This is a measured effect diagram of the standing wave ratio of an ultra-wideband base station antenna;

[0033] Figure 12 This is a measured effect diagram of an ultra-wideband base station antenna isolation diagram;

[0034] Figure 13 This is a measured effect diagram of the horizontal beam width and gain of an ultra-wideband base station antenna;

[0035] Figure 14 This is a measured effect diagram of the horizontal plane cross-polarization ratio of an ultra-wideband base station antenna.

[0036] Illustration:

[0037] Among them, 1-radiation plate, 11-main radiation plate, 111-first half-wave oscillator pair, 112-second half-wave oscillator pair, 12-coupling plate, 121-first coupling oscillator pair, 122-second coupling oscillator pair, 13-metal via, 2-support plate, 21-feed balun, 3-bottom plate, 31-feed circuit, 32-feed microstrip line, 33-ground pad, 4-reflection plate. DETAILED DESCRIPTION

[0038] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following examples are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application as detailed in the claims.

[0039] See also Figure 1 , which is a schematic diagram of the overall structure of a base station antenna.

[0040] See also Figure 2 , which is a schematic diagram of the overall structure of a radiation plate of a base station antenna.

[0041] See also Figure 3 , which is a top-down schematic diagram of a radiating plate of a base station antenna.

[0042] See also Figure 4 , which is a schematic diagram of a radiation plate of a base station antenna viewed from above.

[0043] See also Figure 5 , which is a schematic diagram of a base station antenna bottom plate viewed from above.

[0044] See also Figure 6 , which is a front view schematic diagram of a support plate of a base station antenna.

[0045] See also Figure 7 , which is a rear view schematic diagram of a support plate of a base station antenna.

[0046] See also Figure 8 , which is a left-view schematic diagram of a support plate of a base station antenna.

[0047] See also Figure 9 , which is a schematic diagram of the right side view of a support plate of a base station antenna.

[0048] The present application provides an ultra-wideband base station antenna, comprising a radiation plate 1, a support plate 2 and a base plate 3, wherein the support plate 2 connects the radiation plate 1 and the base plate 3; the radiation plate 1 is provided with a main radiation plate 11, a coupling plate 12 and a metal via 13, the support plate 2 includes a feed balun 21, and the base plate 3 includes a feed circuit 31.

[0049] The coupling plate 12 and the main radiating plate 11 are arranged parallel to each other, and the main radiating plate 11 is respectively connected to the coupling plate 12 and the feeding balun 21 through the metal via 13. The main radiating plate 11 is used to generate the first-order resonance, and the coupling plate 12 is used to generate the second-order resonance; the coupling plate 12 is connected to the feeding circuit 31 through the feeding balun 21.

[0050] In the embodiment of the present application, the radiation plate 1 is a plastic plate with a metal pattern laser-etched on it, but it is not limited to plastic plates and can also be other non-metallic materials, such as a PCB (Printed Circuit Board). The metal pattern laser-etched on the plastic plate is used as the main radiation plate 11 and the coupling plate 12, and a resonant circuit is etched on the plastic plate at the same time, so that the integrated design of the antenna radiation plate 1 and the resonant circuit can be realized. Compared with the traditional die-cast vibrator, the LDS (Laser Direct Structuring) integrated base station antenna is light in weight, small in structure, and low in processing cost. Compared with the PCB vibrator, the LDS integrated base station antenna has low assembly cost, good surface accuracy, small deformation, and high production efficiency.

[0051] Furthermore, the main radiation plate 11 and the coupling plate 12 are laser-coated on different layers of the radiation plate 1 and are arranged in parallel. For example, the main radiation plate 11 is laser-coated on one side of the radiation plate 1, and the coupling plate 12 is laser-coated on the other side of the radiation plate 1.

[0052] Furthermore, after laser-cutting the metal patterns for the main radiation plate 11 and the coupling plate 12 on the PCB, at least one insulating layer is coated on the metal patterns. Coating the insulating layer can prevent the metal patterns from wear and oxidation, thereby improving the performance and life of the base station antenna.

[0053] Furthermore, the main radiating plate 11 is used to generate a first-order resonance, and the coupling plate 12 is used to generate a second-order resonance. The frequency band of the first-order resonance is lower than the frequency band of the second-order resonance, or the frequency band of the first-order resonance is higher than the frequency band of the second-order resonance. In actual engineering, the pattern of the main radiating plate 11 and the coupling plate 12 or the structure of the resonant circuit is adjusted according to engineering requirements to change the frequency bands of the first-order resonance and the second-order resonance.

[0054] Furthermore, the support plate 2 is a plastic plate. On one hand, the support plate 2 serves as a supporting structure for the radiation plate 1. On the other hand, the feed balun 21 is etched on the support plate 2. The feed balun 21 includes two parts, which are located on two layers of the support plate 2. Figures 6-9 As shown, one end of the rectangular feeding balun 21 is connected to the coupling plate 12 on the radiation plate 1 through a metal via 13, and the other end is grounded. The feeding balun 21 on the other side of the same support plate forms a coupling effect with the rectangular feeding balun 21 and is connected to the feeding circuit 31 on the base plate 3 by welding. The feeding circuit 31 is used for power supply.

[0055] The feed circuit 31 uses a microstrip line, which is a planar transmission line with small size, light weight, wide bandwidth, high reliability, and low manufacturing cost. A substrate with different dielectrics can be selected based on the dielectric constant and microwave loss requirements of the microstrip line.

[0056] Furthermore, the support plate 2 includes two plastic plates arranged perpendicular to each other, and the installation lines of the two plastic plates and the radiation plate 1 coincide with the central axes of the first coupling dipole arm 121 and the second coupling dipole arm 122 respectively.

[0057] Furthermore, the main radiating plate 11 is connected to the coupling plate 12 and the feed balun 21 through the metal via 13. At the same time, the support plate 2 uses a copper column to connect to the metal via 13 to achieve the connection between the support plate 2 and the radiating plate 1. One end of the copper column is welded to the metal via 13, and the other end is connected to the support plate 2. The connection method can be threaded connection or welding.

[0058] The support plate 2 utilizes copper pillars soldered to the metal vias 13. This method, on the one hand, allows for quick connection and removal between the support plate 2 and the radiating plate 1. Furthermore, it fully utilizes the function of the metal vias 13, avoiding the need for additional dedicated connection structures on the radiating plate 1 and reducing the space occupied by these structures on the radiating plate 1. Furthermore, the copper pillar soldering method of the metal vias 13 does not significantly affect the operation of the radiating plate 1.

[0059] Furthermore, the radiation plate 1 and the support plate 2 can also be an integrally formed structure, and a laser metal pattern is formed on the integrally formed structure. On the one hand, this reduces the installation process between the radiation plate 1 and the support plate 2 and avoids installation errors; on the other hand, it can overcome the problem of setting a connection mechanism between the radiation plate 1 and the radiation plate 2 that will cause signal interference to the antenna radiation.

[0060] The ultra-wideband base station antenna provided in the present application includes a radiation plate 1, a support plate 2 and a bottom plate 3, wherein the support plate 2 connects the radiation plate 1 and the bottom plate 3, and a feed balun 2 is provided on the support plate 1; a feed circuit 31 is provided on the bottom plate 3; a main radiation plate 11, a coupling plate 12 and a metal via 13 are provided on the radiation plate 1, and the coupling plate 12 is arranged parallel to the main radiation plate 11, and the main radiation plate 11 is respectively connected to the coupling plate 12 and the feed balun 21 through the metal via 13, the main radiation plate 11 is used to generate a first-order resonance, and the coupling plate 12 is used to generate a second-order resonance, and the frequency band of the first-order resonance is lower than the frequency band of the second-order resonance; the coupling plate 12 is connected to the feed circuit 31 through the feed balun 21.

[0061] The base station antenna is electromagnetically coupled to the coupling balun 3 via the main radiating plate 11, generating a first-order resonance in a lower frequency band suitable for 4G network communications. The coupling plate 12 is connected to the main radiating plate 11 via the metal via 13, electromagnetically coupling to generate a second-order resonance in a higher frequency band suitable for 5G network communications. The coupling plate 12 is connected to the feeding circuit 31 via the feeding balun 21, utilizing a coupled balun feeding method to achieve a wider bandwidth network. This provides a base station antenna capable of simultaneously covering both 4G and 5G network frequency bands.

[0062] The ultra-wideband base station antenna provided in this application also has two coaxial signal lines 32 and a ground pad 33 provided on the bottom plate 3. The inner core of one end of the coaxial signal line 32 is connected to the feed circuit 31, and the outer core is connected to the ground pad 33. The other end of the coaxial signal line 32 is connected to an excitation source for providing an excitation current.

[0063] In the embodiment of the present application, the coaxial signal line 32 is a Cable (cable television cable) signal line. The Cable signal line is a coaxial cable, a guiding system composed of two coaxial cylindrical conductors, and a wide-band microwave transmission line with air or high-frequency medium filled between the inner and outer conductors.

[0064] The inner core of the coaxial signal line 32 is connected to the feeding circuit 31 on the base plate 3 , and the outer core of the coaxial signal line 32 is connected to the ground pad 33 .

[0065] Furthermore, one end of the coaxial signal line 32 is connected to the feed circuit 31, and the other end is connected to an excitation source, which provides an excitation current for the base station antenna. In the circuit in which the coaxial signal line 32 is connected to the feed balun 21 through the feed circuit 31, the coaxial signal line 32 and the feed balun 21 form an inductor-capacitor combination circuit. The feed microstrip line 32 acts as an inductor, and the feed balun 21 acts as a capacitor.

[0066] The ultra-wideband base station antenna provided in this application is characterized in that the main radiating plate 11 is electromagnetically coupled with the feeding balun 21 to generate a first-order resonance, and the frequency band of the first-order resonance meets the requirements of the 4G network; the coupling plate 12 is electromagnetically coupled with the main radiating plate 11 to generate a second-order resonance, and the frequency band of the second-order resonance meets the requirements of the 5G network.

[0067] In the embodiment of the present application, the frequency band of the first-order resonance is lower than the frequency band of the second-order resonance. The standing wave tuning can be performed by changing the size of the main radiation plate 11, thereby adjusting the frequency band of the first-order resonance to meet the requirements of the 4G network.

[0068] Furthermore, compared with the first-level resonance, the second-level resonance has a higher frequency band, which meets the requirements of 5G networks.

[0069] Furthermore, the upper limit of the first-level resonance frequency band is greater than or equal to the lower limit of the second-level resonance frequency band, that is, there is an overlapping part between the frequency band of the first-level resonance and the frequency band of the second-level resonance. At this time, the first-level resonance and the second-level resonance appear to the outside world, which is equivalent to the base station antenna providing a continuous resonance in one frequency band.

[0070] Furthermore, when the upper limit of the first-level resonance frequency band is less than the lower limit of the second-level resonance, that is, when the frequency band of the first-level resonance and the frequency band of the second-level resonance do not overlap, the external performance of the first-level resonance and the second-level resonance is equivalent to the base station antenna providing two discontinuous resonances in the frequency band.

[0071] The ultra-wideband base station antenna provided in the present application, the main radiation plate 11 includes a first dipole pair 111 and a second dipole pair 112; the first dipole pair 111 and the second dipole pair 112 are arranged crosswise; the first dipole pair 111 and the second dipole pair 112 are respectively provided with two half-wave dipole arms, and the half-wave dipole arms are provided with slot-shaped openings.

[0072] In an embodiment of the present application, the first vibrator pair 111 and the second vibrator pair 112 are arranged at 90° cross-connection. During the electromagnetic coupling process, the first vibrator pair 111 is equivalent to the capacitor in the resonant circuit, and the second vibrator pair 112 is equivalent to the inductor in the resonant circuit. The first vibrator pair 111 and the second vibrator pair 112 form a capacitor-inductor circuit, and the 90° cross-connection arrangement can generate ±45° cross-polarized radiated radio waves.

[0073] Among them, polarization refers to the polarization of radiated radio waves in the direction of maximum radiation, which is defined as the trajectory of the movement of the endpoint of the electric field vector in the direction of maximum radiation. ±45° cross-polarization can effectively eliminate interference of base station antennas in two polarization directions.

[0074] Furthermore, slot-shaped openings are provided on the half-wave dipole arms of the first dipole pair 111 and the second dipole pair 112. The slot-shaped openings can effectively change the current transmission path on the half-wave dipole arms, thereby enabling the half-wave dipole arms to achieve the best radiation effect with the smallest design size.

[0075] The ultra-wideband base station antenna provided in the present application, the coupling plate 12 includes a first coupling vibrator pair 121 and a second coupling vibrator pair 122; the first coupling vibrator pair 121 and the second coupling vibrator pair 122 are arranged crosswise; the first coupling vibrator pair 121 and the second coupling vibrator pair 122 are respectively provided with two coupling vibrator arms, and the coupling vibrator arms are provided with strip-shaped openings.

[0076] In the embodiment of the present application, the first coupled vibrator pair 121 and the second vibrator pair 122 are arranged in a 90° cross arrangement, the first coupled vibrator pair 121 is parallel to the first vibrator pair 111 , and the second coupled vibrator pair 122 is parallel to the second vibrator pair 112 .

[0077] Furthermore, strip openings are provided on the coupling dipole arms of the first coupling dipole pair 121 and the second coupling dipole pair 122. The strip openings can effectively change the current transmission path on the coupling dipole arms, thereby enabling the coupling dipole arms to achieve the best radiation effect with the smallest design size.

[0078] In the ultra-wideband base station antenna provided in the present application, the main radiation plate 11 and the coupling plate 12 are metal radiation plates laser-coated on the radiation plate 1 .

[0079] In the embodiment of the present application, the main radiating plate 11 and the coupling plate 12 are metal patterns laser-printed onto the radiating plate 1 using LDS technology. However, this technology is not limited to LDS and can also be other laser technologies, such as LRP (Laser Restructured Printing). LDS technology uses a computer to control the movement of a laser according to the trajectory of a conductive pattern, projecting the laser onto a molded device to activate the circuit pattern.

[0080] LDS technology has a short manufacturing process and does not require a circuit pattern mold, which can improve the space utilization of the base station antenna and further miniaturize the base station antenna structure. At the same time, it can prevent other circuit components in the base station antenna from interfering with the radiation of the main radiating plate 11 and the coupling plate 12.

[0081] LRP technology refers to the use of a three-dimensional printing process to apply a conductive pattern to the surface of a workpiece at high speed and precision to form the patterns of the main radiation plate 11 and the coupling plate 12, and then use three-dimensional controlled laser trimming to form a high-precision circuit interconnection structure.

[0082] In the ultra-wideband base station antenna provided in the present application, the radiation plate 1 is an injection-molded plastic part.

[0083] In the embodiment of the present application, the radiation plate 1 needs to have excellent chemical resistance and low-temperature impact resistance. At the same time, in order to achieve a certain degree of production efficiency of the radiation plate 1, the material selected for the radiation plate 1 is required to be easy to form.

[0084] The radiation panel 1 is made of injection-molded plastic, such as PC / ABS material (PC, Polycarbonate; ABS, a terpolymer of acrylonitrile (A)-butadiene (B)-styrene (S)). PC / ABS material is a thermoplastic plastic made by combining polycarbonate and acrylonitrile-butadiene-styrene copolymer, combining the excellent properties of both materials: the moldability of ABS material and the mechanical properties, impact strength, heat resistance, and UV resistance of PC.

[0085] See also Figure 10 , which is a schematic diagram of the support plate structure of a base station antenna.

[0086] In the ultra-wideband base station antenna provided in the present application, the support plate 2 includes two cross-arranged plastic plates.

[0087] In the embodiment of the present application, the support plate 2 includes two cross-arranged plastic plates, which are detachably connected and have an angle of 90° between them. Figure 10 As described above, the two plastic plates can be connected to each other through a notch provided between the two plastic plates.

[0088] The ultra-wideband base station antenna provided in the present application further includes a reflector 4 ; the reflector 4 is connected to the bottom plate 3 .

[0089] In the embodiment of the present application, the base station antenna includes a reflector 4, which is connected to the base plate 3. The reflector 4 and the base plate 3 are connected by bolts, but this connection is not limited to bolts and can also be other connection methods, such as welding, hinges, or pins. The bolt connection facilitates the installation and removal of the reflector 4 and the base plate 3.

[0090] In the base station antenna provided in the present application, the reflector 4 is a horn-shaped structure, the horn-shaped opening direction is the same as the radiation direction of the radiation plate 1, and the reflector 4 is U-shaped, Z-shaped or sawtooth-shaped.

[0091] In the embodiment of the present application, the reflective plate 4 is a trumpet-shaped structure with a 45° flange, but is not limited to a trumpet-shaped structure. It can also be designed into other forms of reflective structures according to engineering needs, such as U-shaped, Z-shaped or sawtooth-shaped structures.

[0092] The direction of the horn-shaped opening is the same as the radiation direction of the radiation plate 1. On the one hand, the horn-shaped opening can make the radiation diffusion direction generated by the radiation plate 1 consistent with the direction of the horn opening, thereby achieving a better directional radiation effect; on the other hand, the reflector 4 can effectively reduce the interference of other antennas in the base station on the working performance of the base station antenna.

[0093] See also Figure 11 , which is a measured effect diagram of the standing wave ratio of an ultra-wideband base station antenna.

[0094] like Figure 11 As shown in the figure, when the number of two-way polarized antenna ports is less than 2 and the radiation frequency band is in the ultra-wideband (2.3GHz to 5GHz) range, the standing wave ratio of the base station antenna communication performance is measured.

[0095] Among them, an antenna port refers to a logical antenna composed of one or more physical antennas, that is, an antenna logical port. The antenna logical port is an identifier of a physical channel or physical signal based on the air interface environment. The same antenna logical port has the same channel environment changes. The receiver can perform channel estimation based on this and demodulate the transmitted signal.

[0096] See also Figure 12 , which is a measured effect diagram of an ultra-wideband base station antenna isolation diagram.

[0097] like Figure 12 As shown, when the radiation frequency band is in the ultra-wideband (2.3 GHz to 5 GHz) range, the isolation between the two antenna ports of the base station antenna is greater than 21 dB (decibel).

[0098] Isolation refers to the ratio of the output signal of one antenna port to the signal received at the other antenna port. It indicates the degree of mutual interference between the two antenna ports. The greater the isolation, the smaller the signal received at the other port when the output signal of one antenna port is constant.

[0099] See also Figure 13 , which is a measured effect diagram of the horizontal plane beam width and gain of an ultra-wideband base station antenna.

[0100] like Figure 13 As shown, when the radiation frequency band is in the ultra-wideband (2.3 GHz to 5 GHz) range, the antenna element has good horizontal plane beam convergence performance, the beam width is 63° to 77°, and the gain range of a single element is 7.1 to 8.4 dB.

[0101] See also Figure 14 , which is a measured effect diagram of the horizontal plane cross-polarization ratio of an ultra-wideband base station antenna.

[0102] like Figure 14 As described above, when the radiation frequency band is in the ultra-wideband (2.3 GHz to 5 GHz) range, the axial cross-polarization ratio of the antenna element is greater than 17 dB, and the sector cross-polarization ratio is greater than 6 dB.

[0103] The base station antenna provided in the present application includes a radiation plate 1, a support plate 2, a bottom plate 3 and a reflector 4, wherein the support plate 2 connects the radiation plate 1 and the bottom plate 3, and the bottom plate 3 is arranged on the reflector 4; a feed balun 21 is provided on the support plate 2; a main radiation plate 11, a coupling plate 12 and a metal via 13 are provided on the radiation plate 1, the coupling plate 12 is arranged parallel to the main radiation plate 11, and the main radiation plate 11 is respectively connected to the coupling plate 12 and the feed balun 21 through the metal via 13, the main radiation plate 11 is used to generate a first-order resonance, and the coupling plate 12 is used to generate a second-order resonance, and the frequency band of the first-order resonance is lower than the frequency band of the second-order resonance; the coupling plate 12 is connected to the feed circuit 31 through the feed balun 21.

[0104] The bottom plate 3 is connected to the reflective plate 4; the reflective plate 4 is a trumpet-shaped structure, the trumpet-shaped opening direction is the same as the radiation direction of the radiation plate 1, and the reflective plate 4 is U-shaped, Z-shaped or sawtooth-shaped flange.

[0105] The base station antenna is electromagnetically coupled to the coupling balun 21 via the main radiating plate 11, generating a first-order resonance in a lower frequency band suitable for 4G network communications. The coupling plate 12 is connected to the main radiating plate 11 via the metal via 13, electromagnetically coupling to generate a second-order resonance in a higher frequency band suitable for 5G network communications. The coupling plate 12 is connected to the feeding circuit 31 via the feeding balun 21, utilizing a coupled balun feeding method to achieve a wider bandwidth network. This provides a base station antenna capable of simultaneously covering both 4G and 5G network frequency bands.

[0106] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. An ultra-wideband base station antenna, comprising a radiation plate (1), a support plate (2) and a bottom plate (3), characterized in that: The support plate (2) connects the radiation plate (1) and the bottom plate (3); a main radiation plate (11), a coupling plate (12) and a metal via (13) are provided on the radiation plate (1); the support plate (2) includes a feed balun (21), and the bottom plate (3) includes a feed circuit (31); The coupling plate (12) and the main radiation plate (11) are arranged parallel to each other, the main radiation plate (11) is respectively connected to the coupling plate (12) and the feeding balun (21) through a metal via (13), the main radiation plate (11) is used to generate a first-order resonance, and the coupling plate (12) is used to generate a second-order resonance; the coupling plate (12) is connected to a feeding circuit (31) through the feeding balun (21); The coupling plate (12) comprises a first coupling vibrator pair (121) and a second coupling vibrator pair (122); the first coupling vibrator pair (121) and the second coupling vibrator pair (122) are arranged crosswise; the first coupling vibrator pair (121) and the second coupling vibrator pair (122) are respectively provided with two coupling vibrator arms, and the coupling vibrator arms are provided with strip-shaped openings; The main radiation plate (11) comprises a first dipole pair (111) and a second dipole pair (112); the first dipole pair (111) and the second dipole pair (112) are arranged crosswise; the first dipole pair (111) and the second dipole pair (112) are respectively provided with two half-wave dipole arms, and the half-wave dipole arms are provided with slot-shaped openings; The support plate (2) comprises two plastic plates arranged perpendicular to each other, and the installation lines of the two plastic plates and the radiation plate (1) respectively coincide with the central axes of the first coupling vibrator pair (121) and the second coupling vibrator pair (122); the support plate (2) uses copper columns to connect the metal vias (13).

2. The ultra-wideband base station antenna according to claim 1, wherein: Two coaxial signal lines (32) and a ground pad (33) are also provided on the bottom plate (3); The inner core of one end of the coaxial signal line (32) is connected to the feed circuit (31), the outer core is connected to the ground pad (33), and the other end of the coaxial signal line (32) is connected to an excitation source, which is used to provide an excitation current.

3. The ultra-wideband base station antenna according to claim 2, wherein: The main radiating plate (11) is electromagnetically coupled with the feeding balun (21) to generate a first-order resonance, and the frequency band of the first-order resonance meets the requirements of the 4G network; the coupling plate (12) is electromagnetically coupled with the main radiating plate (11) to generate a second-order resonance, and the frequency band of the second-order resonance meets the requirements of the 5G network.

4. The ultra-wideband base station antenna according to claim 1, wherein: The main radiation piece (11) and the coupling piece (12) are metal radiation pieces laser-coated on the radiation plate (1).

5. The ultra-wideband base station antenna according to claim 1, wherein: The radiation plate (1) is an injection-molded plastic part.

6. The ultra-wideband base station antenna according to claim 1, wherein: The support plate (2) comprises two cross-arranged plastic plates.

7. The ultra-wideband base station antenna according to claim 1, wherein: The base station antenna also includes a reflector (4); The reflecting plate (4) is connected to the bottom plate (3).

8. The ultra-wideband base station antenna according to claim 7, characterized in that: The reflecting plate (4) is a trumpet-shaped structure, the trumpet-shaped opening direction is the same as the radiation direction of the radiation plate (1), and the reflecting plate (4) is U-shaped, Z-shaped or sawtooth-shaped flanged.

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