Radiating element and base station antenna

Abstract

The present disclosure relates to the technical field of communication antennas, and in particular, to a radiating element and a base station antenna. The radiating element comprises: a base provided with a through hole; a radiator supported on the base by means of a support arm; and at least one feeding assembly. One feeding assembly is arranged corresponding to a dipole binary array of one polarization, and the feeding assembly comprises a combiner, a connector and two feeding arms, wherein a first connecting end for connection to a dipole is provided at one end of each feeding arm, and a second connecting end is provided at the other end of the feeding arm; third connecting ends are respectively provided at two ends of the combiner, and two third connecting ends of the combiner are respectively connected to the second connecting ends of the two feeding arms; the connector passes through the through hole; and one end of the connector is connected to the combiner, and the other end of the connector is used for connection to an external feeding cable to introduce an external signal. The production efficiency of the radiating element is significantly improved, the assembly process is simplified, and the production cost of the antenna is reduced.

Description

Radiating unit and base station antenna

[0001] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on September 28, 2023, with application number 202311269103.3 and invention name “Radiation Unit and Base Station Antenna”, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0002] The present disclosure relates to the technical field of communication antennas, and in particular to a radiation unit and a base station antenna. Background Art

[0003] With the development of 5G communication technology, 4G / 5G fusion antennas have become mainstream antennas, in which the radiation unit is the core component of the fusion antenna.

[0004] The multi-standard fusion antenna integrates radiating units of more frequency bands in a limited space. Due to the complex design of the radiating units themselves, the half-wave dipoles in each radiating unit are connected by coaxial cables. One end of the coaxial cable is connected to the radiating arm of the half-wave dipole by soldering with an electric soldering iron. The other end passes through the radiating unit floor to connect the coaxial cables of the same polarization diagonal to an external power splitter, combining them into one input signal to feed the dipole. This method has a complex process and many solder points, resulting in difficult assembly and poor stability of the overall antenna and the intermodulation stability of the antenna.

[0005] Summary of the Invention

[0006] (1) Technical issues to be resolved

[0007] The technical problem to be solved by the present disclosure is to solve the problems of complex process, difficult assembly and poor stability of existing multi-standard fusion antennas.

[0008] (2) Technical solution

[0009] In order to solve the above technical problems, an embodiment of the present disclosure provides a radiation unit, comprising: a base provided with a through hole;

[0010] a radiator, disposed on the base via a support arm, the radiator comprising at least one polarization, the at least one polarization being constituted by a symmetrical dipole binary array;

[0011] At least one feeding assembly, wherein one feeding assembly corresponds to a dipole binary array in one polarization, the feeding assembly comprises a combiner, a connector, and two feeding arms, each of the feeding arms is respectively connected to two dipoles in one of the dipole binary arrays, and one end of the feeding arm comprises a first connecting end for connecting to the dipole, and the other end comprises a second connecting end; the combiner is disposed on the base, and both ends of the combiner are respectively provided with third connecting ends, and the third connecting ends are respectively connected to the second connecting ends of the two feeding arms; the connector is disposed through the through hole, and one end of the connector is connected to the combiner, and the other end is used to connect to an external feeding cable;

[0012] The combiner is a microstrip structure or an air microstrip structure, or the combiner and the base together form a microstrip structure or an air microstrip structure.

[0013] Optionally, the combiner and the connecting member are integrally formed, or the connecting member is directly connected or coupled to the combiner.

[0014] Optionally, the combiner is a strip-shaped structure, and the connection position between the connecting member and the combiner is equal to the transmission path between the two third connection ends of the combiner.

[0015] Optionally, at least part of the outer surface of the connector is provided with an insulating layer.

[0016] Optionally, the feeding arm is one of a coaxial cable, a sheet metal part or a die-casting part;

[0017] And / or, the coupling component is one of a sheet metal component, a die-cast component or a printed circuit board.

[0018] Optionally, a receiving groove is provided along the length direction of the support arm, wherein the feeding arm is provided in the receiving groove, and the feeding arm and the combiner are connected in the receiving groove.

[0019] Optionally, the feeding arm is a coaxial cable, which includes a core wire, and the outer surface of the core wire is provided with a dielectric layer, a shielding layer and a protective layer in sequence from the inside to the outside; the first connection end and the second connection end of the coaxial cable are both provided with a first exposed section, and the two side walls of the accommodating groove are both provided with protrusions at positions corresponding to the first exposed section, and the first exposed section is clamped between the two protrusions, wherein the first exposed section is the exposed section of the shielding layer.

[0020] Optionally, the first connection end and the second connection end of the coaxial cable are further provided with a second exposed section and a third exposed section, and the first exposed section, the second exposed section and the third exposed section are arranged in sequence from the center to the end of the coaxial cable, and the third exposed section of the second connection end is connected to the combiner by welding or fasteners, wherein the second exposed section is the exposed section of the dielectric layer, and the third exposed section is the exposed section of the core wire.

[0021] Optionally, the feeding arm is a sheet metal part or a die-cast part, and the combiner is a sheet metal part or a die-cast part; the second connection end of the feeding arm is coupled to the third connection end of the combiner, and the support arm is recessed inward at the position where the second connection end and the third connection end are coupled to form an avoidance groove, and the third connection end of the combiner elastically contacts the bottom wall of the avoidance groove.

[0022] Optionally, the combiner is and / or includes a printed circuit board, wherein the printed circuit board includes a substrate and a circuit strip line arranged on the substrate, the substrate is arranged on the base and electrically connected to the base, and the two ends of the circuit strip line are respectively connected to the second connection ends of the two feeding arms.

[0023] In a second aspect, the present disclosure further provides an antenna comprising any of the above-mentioned radiation units.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] FIG1 is a schematic structural diagram of a radiation unit according to some embodiments of the present disclosure;

[0028] FIG2 is a schematic structural diagram of the radiation unit from another perspective according to some embodiments of the present disclosure;

[0029] FIG3 is a schematic diagram of the installation structure of the combiner, the connector, and the base according to some embodiments of the present disclosure;

[0030] FIG4 is a schematic structural diagram of a radiation unit according to some embodiments of the present disclosure (the feeding arm is a coaxial cable, and the combiner is a sheet metal part);

[0031] FIG5 is a partial enlarged view of point A in FIG4 according to some embodiments of the present disclosure;

[0032] FIG6 is a schematic diagram of a structure in which a combiner and a connector are integrally formed according to some embodiments of the present disclosure;

[0033] FIG7 is a schematic diagram of the connection structure of the feed arm, the combiner and the connector according to some embodiments of the present disclosure;

[0034] FIG8 is a schematic structural diagram of a printed circuit board and a connector according to some embodiments of the present disclosure;

[0035] FIG9 is a standing wave ratio curve diagram of the radiation unit.

[0036] Among them, 1. radiator; 2. support arm; 201. accommodating groove; 202. protrusion; 3. base; 301. through hole; 4. feeding assembly; 401. feeding arm; 401a. coaxial cable; 401b. first sheet metal; 4011. second connecting end; 4011a. first exposed section; 4011b. second exposed section; 4011c. third exposed section; 4012. first connecting end; 402. combiner; 402a. second sheet metal; 402b. printed circuit board; 402c. circuit strip line; 4021. third connecting end; 4022. fixing hole; 4023. second fixing part; 4024. avoidance part; 403. connecting part; 4031. first connecting section; 4032. second connecting section; 4032a. insulating layer; 5. first fixing part. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present disclosure.

[0038] In some embodiments, the present disclosure provides a radiating unit and a base station antenna. The radiating unit includes at least one feeding component, wherein the feeding component includes a combiner, a connector, and two feeding arms. In some embodiments, the feeding arm can be connected to a dipole coupling. The two feeding arms can be combined by the combiner, and external signals can be introduced through the connector. The combiner can be arranged on a base. The present disclosure reduces the intermodulation risk of an external combiner through the above-mentioned arrangement. In some embodiments, the combiner can be and / or include a microstrip structure or an air microstrip structure, or the combiner and the base together form a microstrip structure or an air microstrip structure, thereby reducing the loss of the radiating unit. In some embodiments, the feeding arm can be arranged separately from the combiner, thereby making the installation of the radiating unit more convenient and the maintenance cost lower. In addition, the separate arrangement of the feeding arm and the combiner can make the process simpler when producing the radiating unit and less prone to deformation during installation.

[0039] The radiation unit provided by the present disclosure not only improves the overall stability of the base station antenna and simplifies the assembly process, but also further improves production efficiency and reduces the production cost of the antenna.

[0040] 1 to 8 show examples of a radiation unit according to some embodiments of the present disclosure. In some embodiments, the radiation unit includes a base 3 , a radiator 1 and at least one feeding component 4 .

[0041] In some embodiments, a through hole 301 is provided on the base 3 .

[0042] In some embodiments, the radiator 1 is disposed on a base 3 via a support arm 2. In some embodiments, the radiator 1 comprises at least one polarization, wherein the at least one polarization may be formed by a symmetrical dipole binary array.

[0043] In some embodiments, a feeding component 4 corresponds to a polarized dipole binary array. The feeding component 4 includes a combiner 402, a connector 403, and two feed arms 401. In some embodiments, the two feed arms 401 are coupled and connected to the two dipoles in the dipole binary array, respectively. One end of the feed arm 401 is provided with a first connection end 4012 connected to the dipole, and the other end is provided with a second connection end 4011. In some embodiments, the combiner 402 is disposed on the base 3. The two ends of the combiner 402 are respectively provided with a third connection end 4021, wherein the two third connection ends 4021 of the combiner 402 are respectively connected to the second connection end 4011 of the feed arm 401. In some embodiments, the connector 403 is passed through the through hole 301, and one end of the connector 403 is connected to the combiner 402, and the other end is connected to the external feed cable to introduce external signals.

[0044] As shown in Figures 1 to 3, in some embodiments, the radiating unit sets the combiner 402 on the base 3, thereby reducing the risk of intermodulation of the external combiner and the loss of the radiating unit. In addition, the separate setting of the feed arm 401 and the combiner 402 not only makes the installation of the radiating unit more convenient and the maintenance cost lower, but also makes the radiating unit simpler in production process and less likely to deform during installation. The setting of the radiating unit not only improves the overall stability of the base station antenna and simplifies the assembly process, but also further improves production efficiency and reduces the production cost of the antenna.

[0045] As shown in Figures 3, 6, and 7, in some embodiments, the combiner 402 and the connector 403 are integrally formed. Specifically, the combiner 402 and the connector 403 can be sheet metal or die-cast parts. In some embodiments, as shown in Figures 3 and 6, the combiner 402 can be and / or include a second sheet metal 402a. In some embodiments, the connector 403 can also be a sheet metal. In some embodiments, the combiner 402 and the connector 403 are integrally formed using a sheet metal or die-casting process. In some embodiments, the combiner 402 formed using a sheet metal or die-casting process can be and / or include a strip-shaped structure. In some embodiments, the combiner 402 can include an avoidance structure 4024, wherein the avoidance structure 4024 can be formed on the combiner 402 by bending; the avoidance structure 4024 can be arched; and the avoidance structure 4024 can prevent multiple (including two) combiners 402 from blocking each other at the intersection. In some embodiments, the avoidance structure may be bent to form a bending point on the combiner 402 ; the bending point is adapted to the structure of the base 3 to avoid interference with other structures on the base 3 .

[0046] In some embodiments, the integral formation of the connector 403 and the combiner 402 can avoid welding between the two.

[0047] In some embodiments, as shown in Figure 3, the connector 403 can be formed by bending. The connector 403 includes a first connecting section 4031 and a second connecting section 4032, wherein the first connecting section 4031 is connected to the combiner 402 and is located in the same plane as the combiner 402, and the second connecting section 4032 can be formed by bending the connector 403. In some embodiments, the second connecting section 4032 can pass through the through hole 301 on the base 3 and be connected to an external feeder cable on the other side of the base 301 to introduce an external signal. In some embodiments, the first connecting section 4031 and the combiner 402 are located on the same side of the base 3. In addition, both the first connecting section 4031 and the combiner 402 can form a microstrip structure or an air microstrip structure with the base 3.

[0048] In some embodiments, the second connecting section 4032 can be arranged perpendicular to the first connecting section 4031, so that the second connecting section 4032 can pass through the through hole 301 on the base 3. The above arrangement can make the installation of the combiner 402 and the connecting member 403 more convenient. It should be noted that the "perpendicular" described in the present disclosure is not limited to an absolutely vertical state. Due to tolerances caused by the manufacturing process or errors caused by assembly, the angle between the second connecting section 4032 and the first connecting section 4031 can be allowed to fluctuate around 90°, as long as the second connecting section 4032 can pass through the through hole 301 on the base 3 and be installed with the external feeder cable.

[0049] In some embodiments, the connection point between the connector 403 and the combiner 402 can be located between the two third connection terminals 4021 of the combiner 402. In some embodiments, the connection point between the connector 403 and the combiner 402 is equal to the transmission path between the two third connection terminals 4021 of the combiner 402. In some embodiments, the lengths between the connection point between the connector 403 and the combiner 402 and the two third connection terminals 4021 of the combiner 402 are equal, so that during signal transmission, external signals travel the same distance to reach the two third connection terminals 4021 of the combiner 402. This arrangement can ensure more synchronized signal transmission and reduce loss in the radiating unit.

[0050] In some embodiments, an insulating layer 4032a is provided on at least a portion of the surface of the connector 403. The insulating layer 4032a can facilitate adjusting the standing wave ratio of the radiating element. In some embodiments, the insulating layer 4032a can be and / or include air or an insulating medium. Specifically, as shown in FIG3 , the insulating layer 4032a is provided on at least a portion of the surface of the second connecting section 4032. The through hole 301 in the base 3 is a circular hole, and the outer surface of the insulating layer 4032a is a circumferential surface. In some embodiments, the outer surface of the insulating layer 4032a is in contact with the inner wall of the through hole 301. On the one hand, the above-mentioned setting can make the connection between the connector 403 and the base 3 more stable through the insulating layer 4032a, thereby preventing the connector 403 from shaking in the through hole 301. On the other hand, the second connecting section 4032 and the base 3 and the insulating layer 4032a between the two can jointly form a coaxial line structure (the second connecting section 4032 is equivalent to the inner conductor, and the base 3 is equivalent to the outer conductor), thereby reducing radiation loss, adjusting the standing wave ratio of the radiation unit and optimizing the standing wave ratio function.

[0051] In some embodiments, the feeding arm 401 is a coaxial cable 401 a , a sheet metal part, or a die-cast part.

[0052] In some embodiments, as shown in conjunction with Figures 1 to 5 , when the feed arm 401 is a coaxial cable 401a, the first connection end 4012 of the feed arm 401 is formed by bending the exposed core wire of the coaxial cable 401a. The first connection end 4012 of the feed arm 401 is welded to the radiator 1. In some embodiments, the second connection end 4011 of the feed arm 401 is welded to the third connection end 4021 of the combiner 402 via the exposed core wire of the coaxial cable 401a. The third connection end 4021 of the combiner 402 is a welded end.

[0053] In some embodiments, as shown in FIG. 7 , when the feeding arm 401 is a first sheet metal part 401 b or a die-cast part, the first connection end 4012 of the feeding arm 401 is coupled to two dipoles in a dipole binary array by bending.

[0054] In some embodiments, the second connection end 4011 of the feed arm 401 can be welded, coupled, or fixedly connected to the third connection end of the combiner 402 via a fastener. Specifically, when the second connection end 4011 of the feed arm 401 is coupled to the third connection end of the combiner 402, there is no direct contact between the second connection end 4011 of the feed arm 401 and the third connection end 4021 of the combiner 402. When the second connection end 4011 of the feed arm 401 is fixedly connected to the third connection end of the combiner 402 via a fastener, the fastener can be a threaded connector such as a screw or bolt. Specifically, the second connection end 4011 of the feed arm 401 can also be fixedly connected to the third connection end 4021 of the combiner 402 via a metal wire binding or the like.

[0055] The form of the combiner 402 determines the connection method between the combiner 402 and the connector 403. Specifically, the combiner 402 is a sheet metal part, a die-cast part, or a printed circuit board 402b.

[0056] In some embodiments, as shown in Figures 1 to 7 , the combiner 402 may be and / or include a sheet metal part or a die-cast part. The connector 403 is integrally formed using the same manufacturing process as the combiner 402. The third connection end 4021 of the combiner 402 is welded, coupled, or connected to the second connection end 4011 of the feed arm 401 via a fastener.

[0057] In some embodiments, the combiner 402 can be regarded as a strip line in a microstrip structure; in some embodiments, the combiner 402 can also be regarded as a current transmission layer; the base 3 is grounded; the medium between the combiner 402 and the base 3 is a dielectric layer; when there is air between the combiner 402 and the base 3, the combiner 402, the base 3 and the air medium together form an air microstrip structure, reducing the loss of the radiation unit.

[0058] In some embodiments, as shown in FIG8 , the combiner 402 is a printed circuit board 402b, wherein the printed circuit board 402b includes a substrate and a circuit strip line 402c disposed on the substrate. The substrate is disposed on a base and electrically connected to the base. The two ends of the circuit strip line 402c are respectively connected to the second connection ends 4011 of the two feed arms 401. In some embodiments, the circuit strip line 402c on the printed circuit board 402b can have the same effect as the combiner 402. Specifically, when the feed arm 401 is connected to the printed circuit board 402b, the second connection end 4011 of the feed arm 401 can be soldered to the circuit strip line 402c on the printed circuit board 402b. The printed circuit board 402b is disposed on the base 3, and the ground line on the printed circuit board 402b is electrically connected to the base 3.

[0059] In some embodiments, when the combiner 402 is a printed circuit board 402b, a microstrip structure can also be formed. The substrate of the printed circuit board 402b is equivalent to the dielectric layer in the microstrip structure. One end of the connector 403 is soldered or coupled to the circuit stripline 402c on the printed circuit board 402b, and the other end is connected to an external feeder cable to receive external signals. Because the printed circuit board 402b and the base 3 are both grounded, the second connection end 4032 of the connector 403, the printed circuit board 402b, and the base 3 together form a stripline structure, thereby reducing radiation loss, adjusting the standing wave ratio of the radiating element, and optimizing the standing wave ratio function.

[0060] In some embodiments, as shown in Figures 4 and 5, in order to fix the feeding arm 401, the support arm 2 is provided with a receiving groove 201 along the length direction. The feeding arm 401 is provided in the receiving groove 401 along the length direction of the support arm 2, and the feeding arm 401 and the combiner 402 are connected in the receiving groove 201. The connection position of the feeding arm 401 and the combiner 402 is set in the receiving groove 201 to realize the connection operation of the feeding arm 401 and the combiner 402. For example, when the feeding arm 401 and the combiner 402 need to be fixed by welding or by fasteners, by setting the connection position of the feeding arm 401 and the combiner 402 in the receiving groove 201, the connection position of the feeding arm 401 and the combiner 402 is set on the base 3, so that it is easier to operate when performing welding fixation or fastener fixation.

[0061] When the feeding arm 401 is a coaxial cable 401 a , a sheet metal part, or a die-cast part, the connection method between the feeding arm 401 and the support arm 2 is different.

[0062] In some embodiments, as shown in FIG5 , a coaxial cable 401a includes a core wire. A dielectric layer, a shielding layer, and a protective layer are sequentially arranged on the outer surface of the core wire from the inside out. Both the first and second connection ends 4012 of the coaxial cable 401a are provided with a first exposed section 4011a, wherein the first exposed section 4011a is the exposed section of the shielding layer. The first exposed section 4011a may be and / or include a section of the shielding layer that is not covered or concealed, thereby being exposed. For example, the first exposed section 4011a may be the section of the coaxial cable that is not covered by the shielding layer after the protective layer has been stripped. The width of the accommodating groove 201 is greater than the diameter of the coaxial cable 401a, thereby facilitating easy installation of the coaxial cable 401a within the accommodating groove 201. Both sidewalls of the accommodating groove 201 are provided with protrusions at positions corresponding to the first exposed section 4011a, wherein the first exposed section 4011a is located between the two protrusions.

[0063] Because the protective layer of coaxial cable 401a is relatively soft, if the sidewalls of the receiving groove 201 were used to directly abut the protective layer, the coaxial cable 401a could still wobble within the receiving groove 201, resulting in an unstable installation structure. In some embodiments, protrusions 202 are provided on both sidewalls of the receiving groove 201 at positions corresponding to the first exposed section 4011a. By directly abutting the two protrusions 202 against the first exposed section 4011a, the coaxial cable 401 can be effectively secured by the engagement between the protrusions 202 and the first exposed section 4011a, where the hardness of the first exposed section 4011a is higher than that of the protective layer.

[0064] In some embodiments, the first connection end 4012 and the second connection end 4011 of the coaxial cable 401a further include a second exposed section 4011b and a third exposed section 4011c, wherein the second exposed section 4011b is the exposed section of the dielectric layer, and the third exposed section 4011c is the exposed section of the core wire. The second exposed section 4011b may be and / or include a section of the dielectric layer that is not wrapped or hidden and is thus exposed. For example, the second exposed section 4011b may be a section of the coaxial cable that is not wrapped or hidden after the protective layer and the shielding layer are sequentially stripped. The third exposed section 4011c may be and / or include a section of the core wire layer that is not wrapped or hidden and is thus exposed. For example, the third exposed section 4011c may be a section of the coaxial cable that is not wrapped or hidden after the protective layer, the shielding layer, and the dielectric layer are sequentially stripped. The first exposed section 4011a, the second exposed section 4011b, and the third exposed section 4011c are sequentially arranged from the centerline of the coaxial cable 401a toward the end. The third exposed section 4011a of the second connection end 4011 of the feed arm 401 is connected to the third connection end 4021 of the combiner 402 via welding or fasteners. In some embodiments, the first exposed section 4011a, the second exposed section 4011b, and the third exposed section 4011c can be formed by sequentially stripping the protective layer, shielding layer, and dielectric layer from the first connection end 4012 and the second connection end 4011 of the coaxial cable 401a. When the coaxial cable 401a is installed in the receiving groove 201, the portion of the coaxial cable 401a that has not been stripped of the protective layer, shielding layer, and dielectric layer is located on the side of the receiving groove 201 where the raised section is provided, and the second exposed section 4011b and the third exposed section 4011c are located on the other side of the receiving groove 201 where the raised section is provided. When the third exposed section 4011c is connected to the third connection end 4021 of the combiner 402, the second exposed section 4011b leaves a space for the connection operation, thereby making the connection between the third exposed section 4011c and the third connection end 4021 of the combiner 402 more convenient.

[0065] In some embodiments, as shown in Figure 7, the feeding arm 401 is a first sheet metal part 401b or a die-cast part, and the combiner 402 is also a second sheet metal part 402a or a die-cast part, the second connection end 4012 of the first sheet metal part 401b is coupled to the third connection end 4021 of the second sheet metal part 402a; the support arm 2 is recessed inward at the position where the second connection end 4012 and the third connection end 4021 are coupled to form an avoidance groove; the third connection end 4021 of the second sheet metal part 402a elastically conflicts with the bottom wall of the avoidance groove.

[0066] In some embodiments, when the feed arm 401 is a first sheet metal part 401b or a die-cast part, and the combiner 402 is also a second sheet metal part 402a or a die-cast part, the second connection end 4012 of the feed arm 401 and the third connection end 4021 of the combiner 402 are both coupling ends; one end of the avoidance groove extends to the base 3, and the third connection end 4021 of the combiner 402 extends into the avoidance groove and elastically contacts the bottom wall of the avoidance groove; the second connection end 4012 of the feed arm 401 is located on the side of the third connection end 4021 of the combiner 402 away from the bottom wall of the avoidance groove, and the second connection end 4012 of the feed arm 401 and the third connection end 4021 of the combiner 402 do not directly contact each other to form a coupling connection. In some embodiments, the second connection end 4012 of the feed arm 401 is parallel to the third connection end 4021 of the combiner 402. Through the above coupling connection structure, the signal propagation between the feeding arm 401 and the combiner 402 is more stable.

[0067] In some embodiments, a clearance groove is provided on the support arm 2 to provide space for coupling between the third connection end 4021 of the combiner 402 and the second connection end 4012 of the feeder 401. By configuring the third connection end 4021 of the combiner 402 to elastically abut against the bottom wall of the clearance groove, the angle of the third connection end 4021 of the combiner 402 can be adjusted by the bottom wall of the clearance groove when the combiner 402 is mounted on the base 3, thereby making the third connection end 4021 as parallel as possible to the second connection end 4012 of the feeder arm 401.

[0068] In some embodiments, the third connection end 4021 can be formed by bending the two ends of the combiner 402. The third connection end 4021 of the combiner 402 is tilted upward relative to other positions of the combiner 402. When the combiner 402 is naturally placed on the base 3, the angle between the third connection end 4021 and the base 3 is smaller than the angle between the bottom wall of the avoidance groove and the base 3. Therefore, when the third connection end 4021 enters the avoidance groove from the base 3, the end of the third connection end 4021 first abuts against the bottom wall of the avoidance groove; as the third connection end 4021 continues to enter, the third connection end 4021 undergoes elastic deformation, so that the third connection end 4021 as a whole fits with the bottom wall of the avoidance groove. The above arrangement can ensure that the third connection end 4021 of the combiner 402 and the second connection end 4012 of the feeding arm 401 are as parallel as possible. It should be noted that the “parallel” described in the present disclosure is not limited to an absolutely parallel state, because incomplete parallelism caused by manufacturing tolerances or assembly errors is acceptable and does not affect the signal transmission between the second connection end 4011 of the feed arm 401 and the third connection end 4021 of the combiner 402.

[0069] In some embodiments, when the feed arm 401 is a first sheet metal part 401b or a die-cast part, and the combiner 402 is also a second sheet metal part 402a or a die-cast part, a receiving groove 201 may be provided on the support arm 2, or the receiving groove 201 may not be provided. When the receiving groove 201 is not provided on the support arm 2, the feed arm 401 may be provided with fixed points at intervals along the length direction, and the avoidance groove is directly provided on the support arm 2. In some embodiments, an insulating hot-melt material is provided between the fixed point and the support arm 2, and the feed arm 401 and the support arm 2 are fixed by hot-melt. When the receiving groove 201 is provided on the support arm 2, the feed arm 401 can be clamped in the receiving groove 201, and the avoidance groove is provided on the bottom wall of the receiving groove 201, thereby achieving a coupling connection between the third connection end 4021 of the combiner 402 and the feed arm 401. Similarly, the feeding arm 401 may also be fixed by using the accommodating groove 201 and hot-melt bonding.

[0070] In some embodiments, when the feed arm 401 is a sheet metal part 401a or a die-cast part, the feed arm 401 can also be fixedly connected to the support arm 2 via a first fixing member 5. The first fixing member 5 is an insulating fixing member. For example, the first fixing member 5 can be one or more plastic clips. By providing multiple plastic clips at different positions on both sides of the support arm 2, the feed arm 401 can be better secured. It is understood that the insulating fixing member can be provided at different positions along the length of the feed arm 401, and the implementation form of the insulating fixing member can also be flexibly configured. The insulating fixing member can include any implementation form that can achieve support and fixation of the feed arm 401 on the support arm 2. The methods of fixing with the insulating fixing member, snapping with the accommodating groove 201, and fixing the feed arm 401 by hot melt can be combined, but they are not required. Those skilled in the art can flexibly implement them according to specific circumstances.

[0071] In some embodiments, when the combiner 402 is a second sheet metal part 402a or a die-cast part, the combiner 402 is connected to the base 3 via a second fixing member 4023. In some embodiments, the combiner 402 may be provided with a plurality of fixing holes 4022 spaced apart along its length. The second fixing member 4023 may be provided at positions on the base 3 corresponding to the fixing holes 4022. The second fixing member 4023 may be an insulating hot melt member, which is inserted into the fixing hole 4022 and is heat-fused to secure the combiner 402 to the base.

[0072] In some embodiments, the surface of the feed arm 401 is covered with an insulating medium to facilitate isolation of the feed arm 401 from its target dipole via the insulating medium and to better maintain a physical contact-free coupling connection between the feed arm 401 and its target dipole. In some embodiments, the material of the insulating medium may be an anodic oxide coating. Those skilled in the art may flexibly select the material of the insulating medium according to the circumstances. In some embodiments, since the surface of the feed arm 401 is covered with an insulating medium, even if physical isolation occurs between the feed arm 401 and the dipole, the implementation of the coupled feed principle is not affected.

[0073] In some embodiments, the radiation unit includes two orthogonally arranged polarizations and two feeding components 4. The two feeding components 4 are arranged in a one-to-one correspondence with the two polarizations of the radiation unit.

[0074] In some embodiments, the dipole is a half-wave bowl-shaped radiator. The radiating element is a binary array consisting of two half-wave bowl-shaped radiators positioned at a 45° angle, thereby enclosing an installation space within the radiating element. Radiators of other frequency bands can be installed within the installation space.

[0075] Figure 9 is a graph showing the VSWR of radiating elements according to some embodiments of the present disclosure. In Figure 9, the horizontal axis represents frequency (in MHz), and the vertical axis represents voltage VSWR. The solid line represents the frequency curve for the -45° VSWR in the first frequency band, while the dashed line represents the frequency curve for the +45° VSWR. As shown, the VSWR of the radiating elements of the present disclosure is less than 1.3, demonstrating a high degree of impedance matching. This effectively reduces energy loss in the radiating elements, helps lower antenna input power, and offers high reliability and low cost.

[0076] On the other hand, the present disclosure further provides a base station antenna, comprising the radiation unit provided by the above embodiment.

[0077] Within the installation space formed by the radiating units in the above embodiment, radiating units of other frequencies can also be arranged to form multiple common-aperture radiating units. The multiple common-aperture radiating units can be and / or include a combination of same-frequency units, or at least partially a combination of different-frequency units.

[0078] In some embodiments of the present disclosure, co-aperture radiating units may be appropriately arranged to obtain a multi-band fusion base station antenna, thereby improving intermodulation stability and reducing costs.

[0079] In some embodiments, the base station antenna may use a combination of co-frequency units, wherein the multiple co-aperture radiating units in the base station antenna operate in the same frequency band, and the base station antenna can simultaneously receive / transmit signals from multiple devices in the same frequency band.

[0080] In some embodiments, the base station antenna may also employ at least a heterogeneous frequency combination, wherein at least one of the multiple common-aperture radiating elements in the base station antenna operates in a different frequency band than the others, thereby enabling the antenna to receive / transmit signals from multiple devices in multiple frequency bands.

[0081] The base station antenna provided by the embodiments of the present disclosure is more convenient and flexible to use and can meet various usage requirements.

[0082] In some embodiments, due to the orthogonal arrangement of the two polarizations, the combiners 402 of the two feeding assemblies 4 corresponding to the two polarizations overlap on the base 3. One combiner 402 is provided with a raised avoidance portion 4024 in this overlapping portion. The avoidance portion 4024 bends away from the base 3 to avoid cross-contact with the other combiner 402, thereby ensuring that the two feeding assemblies 4 are independently fed.

[0083] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0084] The foregoing description is intended only to provide specific embodiments of the present disclosure, which will enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments shown herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein. Industrial Applicability

[0085] The radiation unit and base station antenna provided by the present invention can effectively reduce the loss of the radiation unit, simplify the assembly process, improve production efficiency, reduce the production cost of the antenna, and at the same time make the overall stability of the base station antenna higher, thereby affecting the intermodulation characteristics of the antenna, and have strong industrial practicality.

Claims

1. A radiation unit, characterized in that: include: A base (3) is provided with a through hole (301); A radiator (1) is arranged on the base (3) via a support arm (2), wherein the radiator (1) comprises at least one polarization, wherein the at least one polarization is composed of a symmetrical dipole binary array; At least one feeding component (4), one feeding component (4) corresponding to a polarized dipole binary array, the feeding component (4) comprising a combiner (402), a connector (403) and two feeding arms (401); wherein each feeding arm (401) is respectively connected to two dipoles in one of the dipole binary arrays, and one end of the feeding arm (401) is provided with a first connecting end (4012) for connecting to the dipole, and the other end is provided with a second connecting end (4011); The combiner (402) is arranged on the base (3), and two ends of the combiner (402) are respectively provided with third connection ends (4021), and the two third connection ends (4021) of the combiner (402) are respectively connected to the second connection ends (4011) of the two feeding arms (401); the connecting member (403) is passed through the through hole (301), and one end of the connecting member (403) is connected to the combiner (402), and the other end is used to be connected to an external feeding cable; The combiner (402) is a microstrip structure or an air microstrip structure, or the combiner (402) and the base (3) together form a microstrip structure or an air microstrip structure.

2. The radiation unit according to claim 1, characterized in that: The combining component (402) and the connecting component (403) are integrally formed.

3. The radiation unit according to claim 1, characterized in that: The connecting element (403) is directly connected or coupled to the combining element (402).

4. The radiation unit according to claim 1, characterized in that: The combiner (402) is a strip-shaped structure, and the connection position between the connecting element (403) and the combiner (402) is equal to the transmission path between the two third connection ends (4021) of the combiner (402).

5. The radiation unit according to claim 1, characterized in that: At least part of the outer surface of the connecting member (403) is provided with an insulating layer (4032a).

6. The radiation unit according to any one of claims 1 to 5, characterized in that: The feeding arm (401) is and / or includes one of a coaxial cable (401a), a sheet metal part or a die-casting part.

7. The radiation unit according to any one of claims 1 to 5, characterized in that: The coupling component (402) is and / or includes one of a sheet metal component, a die-cast component or a printed circuit board (402b).

8. The radiation unit according to claim 6 or 7, characterized in that: The support arm (2) is provided with a receiving groove (201) along the length direction, wherein the feeding arm (401) is arranged in the receiving groove (201), and the feeding arm (401) and the combining element (402) are connected in the receiving groove (201).

9. The radiation unit according to claim 8, characterized in that: The feeding arm (401) is a coaxial cable (401a), the coaxial cable (401a) comprises a core wire, and a dielectric layer, a shielding layer and a protective layer are sequentially arranged on the outer surface of the core wire from the inside to the outside; The first connection end (4012) and the second connection end (4011) of the coaxial cable (401a) are both provided with a first exposed section (4011a), and the two side walls of the accommodating groove (201) are both provided with protrusions (202) at positions corresponding to the first exposed section (4011a), and the first exposed section (4011a) is clamped between the two protrusions (202), wherein the first exposed section is the exposed section of the shielding layer.

10. The radiation unit according to claim 9, characterized in that: The first connection end (4012) and the second connection end (4011) of the coaxial cable (401a) are further provided with a second exposed section (4011b) and a third exposed section (4011c), wherein the second exposed section is the exposed section of the dielectric layer, and the third exposed section is the exposed section of the core wire, and the first exposed section (4011a), the second exposed section (4011b) and the third exposed section (4011c) are arranged in sequence from the center to the end of the coaxial cable (401a), and the third exposed section (4011c) of the second connection end (4011) is welded to the combiner (402) or connected via a fastener.

11. The radiation unit according to claim 6 or 7, characterized in that: The feeding arm (401) is a sheet metal part or a die-casting part, and the combining part (402) is a sheet metal part or a die-casting part. The second connection end (4011) of the feeding arm (401) is coupled to the third connection end (4021) of the combining part (402). The support arm (2) is recessed inward at the position where the second connection end (4011) and the third connection end (4021) are coupled to form an avoidance groove, and the third connection end (4021) of the combining part (402) elastically contacts the bottom wall of the avoidance groove.

12. The radiation unit according to claim 6 or 7, characterized in that: The combining element (402) is a printed circuit board (402b), the printed circuit board (402b) comprising a substrate and a circuit strip line (402c) arranged on the substrate, the substrate being arranged on the base (3) and electrically connected to the base (3), and the two ends of the circuit strip line (402c) being respectively connected to the second connection ends (4011) of the two feeding arms (401).

13. A base station antenna, characterized in that: Comprising the radiation unit according to any one of claims 1 to 12.

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