Multi-frequency antenna device, base station antenna and reflecting plate for testing

Abstract

The invention provides a multi-frequency antenna device, which comprises a phase shift arm module, a reflecting plate, a passive antenna module and an active antenna module, the phase shifting arm module is mounted on the side edge of the reflecting plate, and a phase shifter module is integrated in the phase shifting arm module; the passive antenna module is installed on the phase shift arm module, and a passive radiation unit in the passive antenna module is electrically connected with the phase shifter module; an active radiation unit in the active antenna module is arranged on the reflecting plate. The invention further provides a base station antenna and a reflecting plate for testing.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a multi-frequency antenna device, a base station antenna and a reflector for testing. Background Art

[0002] With the development of 5G antenna technology, the deployment of 5G base stations has become imminent. At present, in order to quickly deploy 5G base stations, the main solution is to add 5G antennas and equipment to the original 4G base stations. Since the integrated (A+P) antenna, which integrates active (A) antennas and passive (P) antennas, has the fusion characteristics of 4G and 5G, it is widely used in the deployment of 5G base stations, which will become an inevitable trend for 5G antennas in the future.

[0003] Existing active-passive integrated (A+P) antennas usually adopt a front-to-back stacked integration solution, with the passive (Passive, P) antenna in front and the active (Active, A) antenna in the back, in a split arrangement. This integration solution inevitably has the following problems in practical applications: First, the functional components of the passive antenna in front of the active antenna will have a certain impact on the electromagnetic waves radiated by the active antenna, ultimately affecting the performance of the active antenna; second, the functional components inside the passive antenna can only be arranged in a position that does not affect the radiation of the active antenna, which greatly limits the space of the passive antenna and makes its size and weight larger; third, when multiple active antennas and passive antennas are integrated, most of the space of the passive antenna will affect the active antenna, making it impossible to arrange the functional components inside the passive antenna. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the present disclosure provides a multi-frequency antenna device, a base station antenna and a reflector for testing.

[0005] In a first aspect, an embodiment of the present disclosure provides a multi-frequency antenna device, which includes a phase shifter arm module, a reflector, a passive antenna module and an active antenna module; the phase shifter arm module is installed at the side of the reflector, and a phase shifter module is integrated in the phase shifter module; the passive antenna module is installed in the phase shifter arm module, and the passive radiation unit in the passive antenna module is electrically connected to the phase shifter module; the active radiation unit in the active antenna module is arranged on the reflector.

[0006] In a second aspect, an embodiment of the present disclosure provides a base station antenna, which adopts the above-mentioned multi-frequency antenna device provided by an embodiment of the present disclosure.

[0007] In a third aspect, an embodiment of the present disclosure provides a test reflector, which is used to test a passive antenna module; a test interface is provided at one end of the test reflector for electrically connecting to a test device; the passive antenna module is installed on a phase shifter arm module, which is installed on the side of the test reflector during testing, and a phase shifter module is integrated in the phase shifter arm module; the passive radiation unit in the passive antenna module is electrically connected to the phase shifter module.

[0008] In the technical solution of the multi-frequency antenna device, base station antenna and test reflector in the embodiment of the present disclosure, the passive antenna module and the active antenna module share a reflector, which can not only save the lower space of the passive antenna module and solve the problem that the internal functional components of the passive antenna cannot be laid out, but also effectively reduce the mutual coupling between the 4G system and the 5G system, and ensure the performance of the active antenna. On this basis, by using the phase shift arm module as the installation basis of the passive antenna module, the passive antenna module can be installed on the side of the reflector. Compared with directly installing the passive antenna module on the side of the reflector, by installing the passive antenna module on the phase shift arm module, the passive antenna module (usually multiple) and the phase shift arm module can be combined into an integral module, thereby realizing the overall modularization of the passive antenna module, and it is easier to realize the universal connection by installing the phase shift arm module on the side of the reflector. For example, the phase shift arm module and the reflector are connected by a universal interface, so that it is easy to realize the combination of the passive antenna module and the active antenna modules of different sizes through a universal connection method, thereby increasing the versatility of the product and meeting different customer needs. In addition, the above-mentioned integrated module has all the feeding structures of the passive antenna module, so that the passive antenna module can be produced and debugged separately using a test reflector, and no longer needs to be tested in combination with the active antenna module, thereby greatly simplifying the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In the accompanying drawings of the embodiments of the present disclosure:

[0010] Figure 1 A structural exploded view of a multi-frequency antenna device provided in an embodiment of the present disclosure;

[0011] Figure 2 A schematic diagram of the distribution of active radiating units and passive radiating units in a side-view direction of a multi-frequency antenna device provided by an embodiment of the present disclosure;

[0012] Figure 3 A structural diagram of a phase shift arm module used in an embodiment of the present disclosure;

[0013] Figure 4 It is a partial structural diagram of the phase-shift arm module and the passive antenna module at the end arm used in the embodiment of the present disclosure;

[0014] Figure 5 It is a partial structural diagram of the phase-shift arm module and the passive antenna module at the driver used in the embodiment of the present disclosure;

[0015] Figure 6 It is a structural exploded view of the phase-shifting arm module and the passive antenna module used in the embodiment of the present disclosure;

[0016] Figure 7 A structural exploded view of another multi-frequency antenna device provided by an embodiment of the present disclosure;

[0017] Figure 8 A structural diagram of a passive antenna module used in an embodiment of the present disclosure;

[0018] Fig. 9 A cross-sectional view of a multi-frequency antenna device provided by an embodiment of the present disclosure in a direction perpendicular to the extension direction of the first phase shifting arm;

[0019] Fig.10 A structural diagram of a first phase shift arm used in an embodiment of the present disclosure;

[0020] Fig.11 This is a structural diagram of the assembled test reflector, phase shift arm module and passive antenna module used in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0022] The present disclosure will be described more fully below with reference to the accompanying drawings, but the embodiments shown may be embodied in different forms, and the present disclosure should not be construed as being limited to the embodiments set forth below. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete, and will enable those skilled in the art to fully understand the scope of the present disclosure.

[0023] The accompanying drawings of the embodiments of the present disclosure are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification, and are used together with the detailed embodiments to explain the present disclosure, and do not constitute a limitation of the present disclosure. By describing the detailed embodiments with reference to the accompanying drawings, the above and other features and advantages will become more apparent to those skilled in the art.

[0024] The present disclosure may be described with reference to plan views and / or cross-sectional views by means of ideal schematic views of the present disclosure. Therefore, the exemplary illustrations may be modified according to manufacturing techniques and / or tolerances.

[0025] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0026] The terms used in the present disclosure are only used to describe specific embodiments and are not intended to limit the present disclosure. The term "and / or" as used in the present disclosure includes any and all combinations of one or more related enumerated items. The singular forms "one" and "the" as used in the present disclosure are also intended to include plural forms, unless the context clearly indicates otherwise. The terms "including", "made of..." as used in the present disclosure specify the presence of the features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used in this disclosure have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined in this disclosure.

[0028] The present disclosure is not limited to the embodiments shown in the drawings, but includes modifications of the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions of the elements, but are not intended to be limiting.

[0029] In some related technologies, the active-passive integrated (A+P) antenna usually adopts a front-to-back stacking integration solution, with the passive (Passive, P) antenna in front and the active (Active, A) antenna in the back, in a split arrangement. Moreover, the radiation surface of the passive antenna will overlap with the radiation surface of the active antenna. The overlapping part of the passive structural parts is called the common aperture of the passive antenna, and the non-overlapping part is called the non-common aperture of the passive antenna. However, the overlapping part of the passive will not only affect the radiation of the active, but also in order to avoid blocking the active antenna, most of the functional components inside the passive will be placed in the non-common aperture, which will greatly limit the layout space of the passive antenna, resulting in complex layout and increased weight cost. In addition, in the case of multiple active antennas, the common aperture will be very large, resulting in no space in the non-common aperture to accommodate the passive functional components, making it impossible to layout the functional components inside the passive antenna. In addition, in the related art, there is a situation where radiation units of different frequency bands are staggered, which makes the layout of the radiation surface complex and prone to design interference. It is necessary to make major changes to the passive, which increases the difficulty and complexity of the design. In addition, in the related art, the passive and active need to be combined for testing, which is not convenient for problem location and is not conducive to mass production. Moreover, in the related art, since the common aperture part of the passive antenna is customized for a specific frequency, it can only select waves of a specific frequency, and different active antennas are of different sizes, there are often interference problems when combined. This makes the same passive antenna often cannot be assembled with active antennas of different frequency bands, which increases the difficulty of design and makes it impossible to achieve product versatility.

[0030] In order to solve at least one of the above technical problems, in a first aspect, an embodiment of the present disclosure provides a multi-frequency antenna device, which can be applied to a base station antenna, specifically a 5G base station antenna, or a 4G / 5G fusion antenna.

[0031] Please also read Figures 1 to 6 The multi-frequency antenna device 100 includes a phase shift arm module 1, a reflector 2, a passive antenna module 3 and an active antenna module 4. The phase shift arm module 1 is installed at the side 21 of the reflector 2, and a phase shifter module is integrated in the phase shift arm module 1; the passive antenna module 3 is installed in the phase shift arm module 1, and the passive radiation unit 31 in the passive antenna module 3 is electrically connected to the phase shifter module; the active radiation unit 41 in the active antenna module 4 is arranged on the reflector 2.

[0032] In the multi-frequency antenna device 100 in the embodiment of the present disclosure, the passive antenna module 3 and the active antenna module 4 share a reflector 2, which not only saves the lower space of the passive antenna module 3 and solves the problem that the internal functional components of the passive antenna module 3 cannot be laid out, but also effectively reduces the mutual coupling between the 4G system and the 5G system, thereby ensuring the performance of the active antenna. On this basis, by using the phase-shift arm module 1 as the installation base of the passive antenna module 3, the passive antenna module 3 can be installed at the side 21 of the reflector 2. Compared with directly installing the passive antenna module 3 on the side 21 of the reflector 2, by installing the passive antenna module 3 on the phase-shift arm module 1, the passive antenna module 3 (usually multiple) can be combined with the phase-shift arm module 1 into an integrated module, thereby realizing the overall modularization of the passive antenna module 3. Moreover, by installing the phase-shift arm module 1 on the side 21 of the reflector 2, it is easier to realize the universal connection. For example, the phase-shift arm module 1 and the reflector 2 are connected by a universal interface, so that it is easy to realize the combination of the passive antenna module 3 and the active antenna module 4 of different sizes through a universal connection method, thereby increasing the versatility of the product and meeting different customer needs. In addition, the above-mentioned integrated module has all the feeding structures of the passive antenna module 3, so that the passive antenna module 3 can be produced and debugged separately by using the test reflector, and it is no longer necessary to test it in combination with the passive antenna module 3, thereby greatly simplifying the production process.

[0033] Specifically, the phase shifter module is used to adjust the phase of the passive radiation unit 31, which is integrated in the phase shift arm module 1, and the passive antenna module 3 is installed on the phase shift arm module 1, so that the passive radiation unit 31 in the passive antenna module 3 is more conveniently electrically connected to the phase shifter module. Therefore, the phase shift arm module 1 integrated with the phase shifter module can have both the phase shifting function and the function of serving as the installation base of the passive antenna module 3, which is a multi-purpose one, so there is no need to set up other components, simplifying the device structure, reducing weight and cost.

[0034] like Figure 5 and Figure 6As shown, the phase shifter module realizing the above functions includes a phase shifter circuit (not shown in the figure), a phase shift interface 111 and a driver 6. The first phase shift arm 11 and the second phase shift arm 12 are both integrated with the phase shifter circuit, and the passive radiation unit 31 in the passive antenna module 3 is electrically connected to the phase shifter circuit; the phase shifter circuit is provided with a dielectric plate and a phase shift circuit board whose relative positions can be changed. The phase shift interface 111 is, for example, provided on the first phase shift arm 11 and the second phase shift arm 12, and the driver 6 is, for example, installed on the first phase shift arm 11 and the second phase shift arm 12 through a bracket 63, and is mechanically connected to the phase shift interface 111 on the first phase shift arm 11 and the second phase shift arm 12. When the driver 6 receives a control signal, the motor inside it rotates, and the motor drives the driving rod 61 to rotate, so as to transmit power to the phase shift interface 111 through the driving rod 61, thereby changing the relative position of the dielectric plate and the phase shift circuit board in the phase shifter circuit, thereby realizing downtilt angle adjustment. The internal structure and phase shifting function of the phase shifter circuit (including but not limited to the dielectric plate and the phase shifting circuit board) and the driver 6 are conventional technologies in the art and will not be described in detail here.

[0035] There may be multiple phase shift arm modules 1 to achieve this function. In some embodiments, for example Figures 3 to 6 As shown, the phase shift arm module 1 includes a first phase shift arm 11 and a second phase shift arm 12 which are arranged opposite to each other, and two end arms 13 connected between the first phase shift arm 11 and the second phase shift arm 12. The first phase shift arm 11, the second phase shift arm 12 and the two end arms 13 together form a frame structure, and are respectively installed at four sides 21 of the reflector 2; the first phase shift arm 11 and the second phase shift arm 12 are both installed with at least one passive antenna module 3. In this case, the phase shifter module, for example, includes a phase shifter circuit (not shown in the figure) integrated in the first phase shifter arm 11 and the second phase shifter arm 12, and is electrically connected to the passive radiation unit 31 in the passive antenna module 3. With the help of the above-mentioned frame structure, at least one passive antenna module 3 can be more stably installed on two opposite sides 21 of the reflector 2.

[0036] In a specific embodiment, the reflector 2 is, for example, a rectangular reflector, and the two long sides of the rectangular reflector are respectively mounted with a first phase shifter arm 11 and a second phase shifter arm 12, and the first phase shifter arm 11 and the second phase shifter arm 12 are both mounted with a plurality of passive antenna modules 3, and the number of the plurality of passive antenna modules 3 mounted on the first phase shifter arm 11 is the same as the number of the plurality of passive antenna modules 3 mounted on the second phase shifter arm 12, and they are arranged relatively in a one-to-one correspondence. The above-mentioned two end arms 13 are used to connect the first phase shifter arm 11 and the second phase shifter arm 12 together to form an integral frame structure, and the end of each end arm 13 is fixedly connected to the end of the first phase shifter arm 11 or the second phase shifter arm 12, for example, by a right-angle arm 14. The first phase shifter arm 11 and the second phase shifter arm 12, the two end arms 13 and the right-angle arm 14 are, for example, all in the shape of a plate, and are perpendicular to the plate surface of the reflector 2. In practical applications, the shape of the reflector 2 is not limited to a rectangle, and can be other shapes according to specific needs. The shape of the frame structure formed by the first phase shifter arm 11, the second phase shifter arm 12 and the two end arms 13 is adapted to the shape of the reflector 2. According to different shapes, the number of the first phase shifter arm 11 and the second phase shifter arm 12 can be multiple, and the two end arms 13 can be present or absent. The first phase shifter arm 11 and the second phase shifter arm 12 can extend in a straight line direction or in an arc direction.

[0037] In the process of assembling the passive antenna module 3 and the active antenna module 4, each passive antenna module 3 is first installed on the above-mentioned frame structure to be combined into an integral module, and then the integral module is installed on the side 21 of the reflector 2 to realize the assembly of the passive antenna module 3 and the active antenna module 4. This assembly method can more easily realize universal connection. For example, the frame structure and the reflector 2 are connected by a universal interface, so that it is easy to combine the passive antenna module 3 with active antenna modules 4 of different sizes through a universal connection method, thereby increasing the versatility of the product and meeting different customer needs.

[0038] In order to achieve universal connection, in some embodiments, a plug-in structure (not shown in the figure) is provided between the phase-shift arm module 1 and the side 21 of the reflector 2, which is used to plug the phase-shift arm module 1 and the side 21 of the reflector 2. In this way, the passive antenna module 3 can be combined with active antenna modules 4 of different sizes through a universal connection method, thereby increasing the versatility of the product and meeting different customer needs. The above-mentioned plug-in structure, for example, includes a male socket and a female socket, one of which is provided on the phase-shift arm module 1 (such as the above-mentioned frame structure), and the other is provided on the side 21 of the reflector 2. Of course, in actual applications, other connection structures, such as a snap-in structure, can also be provided between the phase-shift arm module 1 and the side 21 of the reflector 2, which can also achieve universal connection.

[0039] In some embodiments, Figure 1 and Figure 2 As shown, the multi-frequency antenna device 100 also includes an outer cover 5, which is connected to the side 21 of the reflector 2 and encloses the reflector 2 to form a closed space, and the phase shift arm module 1, the passive antenna module 3 and the active radiation unit 41 are located in the closed space. The outer cover 5 can protect the modules and units located therein. Specifically, the active radiation unit 41 in the active antenna module 4 is installed on the board surface of the reflector 2 and is located in the above-mentioned closed space, and the remote radio unit 42 (RRU) in the active antenna module 4 is installed on the side of the reflector 2 away from the active radiation unit 41 and is located outside the closed space. Further, in some embodiments, the projection of the passive antenna module 3 onto the reflector 2 falls into the reflector 2, so that the reflector 2 can provide a reflection surface for the passive antenna module 3. Specifically, a plurality of passive antenna modules 3 are arranged on the first phase shifter arm 11 and the second phase shifter arm 12 along their extension direction. In this case, in order to enable the reflector 2 to provide a reflective surface for the plurality of passive antenna modules 3 on the first phase shifter arm 11 and the second phase shifter arm 12, the length of the reflector 2 is not less than the length of the first phase shifter arm 11 and the second phase shifter arm 12, and the width of the reflector 2 is not less than the length of the two end arms 13, so as to ensure that the projection of the passive antenna module 3 onto the reflector 2 falls on the reflector 2.

[0040] In some embodiments, the active antenna module 4 includes at least one queue of multiple active radiation units 41 and at least one remote radio frequency unit 42; the queue is, for example, a rectangular or square queue. Each remote radio frequency unit 42 is arranged on the side of the reflector 3 away from the active radiation unit 41, and each remote radio frequency unit 42 corresponds to each queue. In one example, Figure 1 As shown, for the case where the multiple active radiation units 41 are arranged in two queues, there are two remote radio frequency units 42, and the two queues are arranged in sequence along the extending direction of the first phase shift arm 11 and the second phase shift arm 12. In another example, as Figure 7 As shown, for the case where the queue in which the multiple active radiation units 41 are arranged is a single one, the remote radio frequency unit 42 is a single one and can be distributed at the middle position on the reflection plate 2. It should be noted that in order to enable the reflection plate 2 to provide a reflection surface for the multiple passive antenna modules 3 on the first phase shifter arm 11 and the second phase shifter arm 12, the length and width of the reflection plate 2 need to be adapted to the length of the first phase shifter arm 11 and the second phase shifter arm 12, and the length of the two end arms 13 (or adapted to the size of the area in which the passive antenna modules 3 are arranged). On this basis, the width of the queue in which the multiple active radiation units 41 are arranged is, for example, substantially equivalent to the width of the reflection plate 2; if the length of a single queue in which the multiple active radiation units 41 are arranged is less than the length of the reflection plate 2, there is a blank area on the reflection plate 2 where the multiple active radiation units 41 are not arranged, such as Figure 7As shown, the blank area is located on both sides of the queue, for example; similarly, if the sum of the lengths of the two queues in which the multiple active radiation units 41 are arranged is less than the length of the reflection plate 2, there is also a blank area on the reflection plate 2 where the multiple active radiation units 41 are not arranged, such as Figure 1 As shown, the blank area is, for example, located between two queues. However, the disclosed embodiment is not limited thereto. In practical applications, the queue in which the multiple active radiation units 41 are arranged can be located at any position on the reflection plate 2. In other words, the blank area can be located at any position on the reflection plate 2. Alternatively, the multiple active radiation units 41 can be arranged to cover the entire reflection plate 2. In this case, there is no blank area.

[0041] The passive antenna module 3 that can be installed in the phase shift arm module 1 can have various structures. In some embodiments, for example Figure 8 and Fig. 9 As shown, the passive antenna module 3 includes a passive radiation unit 31, a bracket 32 ​​and a signal adapter 33. The bracket 32 ​​is mounted on the first phase shift arm 11 or the second phase shift arm 12; the passive radiation unit 31 is mounted on the bracket 32; a mounting groove 324 is provided on the bracket 32, the first end of the mounting groove 324 extends to the position of the passive radiation unit 31, and the second end of the mounting groove 324 extends to the position of the first phase shift arm 11 or the second phase shift arm 12; the signal adapter 33 is provided in the mounting groove 324, and is electrically connected to the passive radiation unit 31 through the first end of the mounting groove 324, and is electrically connected to the phase shifter circuit integrated in the first phase shift arm 11 or the second phase shift arm 12 through the second end of the mounting groove 324.

[0042] Specifically, the bracket 32 ​​is used as the installation base of the passive radiation unit 31, and the first phase shift arm 11 or the second phase shift arm 12 is fixedly connected to the bracket 32, such as welding, riveting, threading, etc. In some embodiments, in order to facilitate installation, a limiting structure is provided between the bracket 32 ​​and the first phase shift arm 11 or the second phase shift arm 12 to limit the position of the bracket 32. Figure 8 and Fig.10 As shown, the limiting structure includes, for example, a limiting protrusion 323 and a limiting groove 112. The limiting protrusion 323 is, for example, disposed on the bracket 32, and the limiting groove 112 is disposed on the first phase shift arm 11 or the second phase shift arm 12. The limiting protrusion 323 cooperates with the limiting groove 112 in a manner as shown in FIG. Figure 5 As shown, the position of the bracket 32 ​​in the extension direction of the first phase shifting arm 11 or the second phase shifting arm 12 is limited. Of course, in practical applications, the limiting groove 112 can also be set on the bracket 32, and the limiting protrusion 323 can be set on the first phase shifting arm 11 or the second phase shifting arm 12. In addition, the number of the limiting protrusion 323 and the limiting groove 112 can be one or more than two, and they are matched one by one.

[0043] The support 32 for realizing the above functions may have various structures. In some embodiments, for example Figure 8 As shown, the bracket 32 ​​includes a support plate 321, one end of the support plate 321 is mounted on the first phase shift arm 11 or the second phase shift arm 12, and the other end is provided with a bending portion 322 that is bent relative to the support plate 321 toward the inner side of the frame structure (that is, the side opposite to each other of the first phase shift arm 11 and the second phase shift arm 12), and the passive radiation unit 31 is mounted on the bending portion 322; the above-mentioned installation groove 324 extends through the support plate 321 and the bending portion 322, so that the first end of the installation groove 324 can be extended to the bending portion 322 to achieve electrical connection between the signal adapter 33 and the passive radiation unit 31, and the second end of the installation groove 324 can be extended to the support plate 321 to achieve electrical connection between the signal adapter 33 and the phase shifter circuit integrated in the first phase shift arm 11 or the second phase shift arm 12. Further, as Fig.10 As shown, a welding position 113 is also provided on the first phase shift arm 11 or the second phase shift arm 12 at a position corresponding to the support plate 321. By welding the signal adapter 33 to the welding position 113, the signal adapter 33 can be electrically connected to the phase shifter circuit in the first phase shift arm 11 or the second phase shift arm 12.

[0044] In some embodiments, the multi-frequency antenna device 100 further includes at least one frame 8, and the frame 8 is connected between the first phase shifter arm 11 and the second phase shifter arm 12. With the frame 8 spanning between the first phase shifter arm 11 and the second phase shifter arm 12, the strength of the frame structure formed by the first phase shifter arm 11, the second phase shifter arm 12 and the two end arms 13 can be improved, thereby improving the installation stability and reliability. Further, in the embodiment where the outer cover 5 is provided, as shown in FIG. Fig. 9 As shown, the cross-sectional profile shape of the skeleton 8 in the direction parallel to the short side 21 of the reflector 2 is similar to the cross-sectional profile shape of the outer cover 5 in the direction parallel to the short side 21 of the reflector 2, but a certain distance is maintained, so that when the outer cover 5 is deformed by external force, with the support of the skeleton 8, damage to the internal components of the outer cover 5 due to the depression of the outer cover 5 can be avoided.

[0045] In a second aspect, an embodiment of the present disclosure provides a base station antenna, which adopts the multi-frequency antenna device 100 provided in the embodiment of the present disclosure. The base station antenna can be a 5G base station antenna, or a 4G / 5G fusion antenna.

[0046] Thirdly, Fig.11As shown, the embodiment of the present disclosure further provides a test reflector 9, which is used to test the passive antenna module 3. The passive antenna module 3 is installed on the phase shift arm module 1, and the phase shift arm module 1 is installed on the side of the test reflector 9 during the test, and a test interface 91 is provided at one end of the test reflector 9 for electrical connection with the test equipment.

[0047] Since the passive antenna module 3 and the phase shift arm module 1 are combined into an integrated module, the overall modularization of the passive antenna module 3 is realized. The integrated module has all the feeding structures of the passive antenna module 3. On this basis, with the help of the test reflector 9, the passive antenna module 3 can be tested and debugged separately, and no longer needs to be tested in combination with the active antenna module 4, thereby greatly simplifying the production process. The above-mentioned test equipment is used, for example, to test the electrical performance of the passive antenna module 3 through the test reflector 9.

[0048] In some embodiments, the structure and size of the test reflector 9 (excluding the test interface 91) are, for example, the same as the structure and size of the reflector 2 in the above embodiment. In this way, on the one hand, the connection can be universalized, that is, the interface for connecting the test reflector 9 and the reflector 2 in the above embodiment to the phase shift arm module 1 is the same, and both can be connected to the phase shift arm module 1. On the other hand, during testing, the test reflector 9 can replace the reflector 2 to provide a reflection surface for the passive antenna module 3, that is, the test reflector 9 has the same reflection function as the reflector 2 in the above embodiment.

[0049] To sum up, in the technical solutions of the multi-frequency antenna device 100, the base station antenna and the test reflector 9 in the embodiments of the present disclosure, the passive antenna module 3 and the active antenna module 4 share a reflector 2, which not only saves the lower space of the passive antenna module 3 and solves the problem that the internal functional components of the passive antenna cannot be laid out, but also effectively reduces the mutual coupling between the 4G system and the 5G system, thereby ensuring the performance of the active antenna. On this basis, by using the phase-shift arm module 1 as the installation base of the passive antenna module 3, the passive antenna module 3 can be installed at the side 21 of the reflector 2. Compared with directly installing the passive antenna module 3 on the side 21 of the reflector 2, by installing the passive antenna module 3 on the phase-shift arm module 1, the passive antenna module 3 (usually multiple) can be combined with the phase-shift arm module 1 into an integrated module, thereby realizing the overall modularization of the passive antenna module 3. Moreover, by installing the phase-shift arm module 1 on the side 21 of the reflector 2, it is easier to realize the universal connection. For example, the phase-shift arm module 1 and the reflector 2 are connected by a universal interface, so that it is easy to realize the combination of the passive antenna module 3 and the active antenna module 4 of different sizes through a universal connection method, thereby increasing the versatility of the product and meeting different customer needs. In addition, the above-mentioned integrated module has all the feeding structures of the passive antenna module 3, so that it can be produced and debugged separately using the test reflector, and it is no longer necessary to combine the passive antenna module 3 with the passive antenna module 3 for testing, thereby greatly simplifying the production process.

[0050] The present disclosure has disclosed example embodiments, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly stated, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A multi-frequency antenna device, wherein: It includes a phase shift arm module, a reflector, a passive antenna module and an active antenna module; The phase shift arm module is installed at the side of the reflector, and a phase shifter module is integrated in the phase shift arm module; the passive antenna module is installed on the phase shift arm module, and the passive radiation unit in the passive antenna module is electrically connected to the phase shifter module; the active radiation unit in the active antenna module is arranged on the reflector.

2. The multi-frequency antenna device according to claim 1, wherein: The phase shift arm module includes a first phase shift arm and a second phase shift arm which are arranged opposite to each other, and two end arms connected between the first phase shift arm and the second phase shift arm, wherein the first phase shift arm, the second phase shift arm and the two end arms together form a frame structure and are respectively installed at four sides of the reflector; The first phase-shifting arm and the second phase-shifting arm are both equipped with at least one passive antenna module.

3. The multi-frequency antenna device according to claim 2, wherein: The phase shifter module includes a phase shifter circuit, a phase shift interface and a driver; The first phase shift arm and the second phase shift arm are both integrated with the phase shifter circuit, and the passive radiation unit in the passive antenna module is electrically connected to the phase shifter circuit; The driver is mounted on the first phase shift arm and the second phase shift arm, and is electrically connected to the phase shifter circuit and the phase shift interface.

4. The multi-frequency antenna device according to claim 1, wherein: An inserting structure is provided between the phase shifting arm module and the side of the reflecting plate, and is used for inserting the phase shifting arm module and the side of the reflecting plate.

5. The multi-frequency antenna device according to claim 1, wherein: It also includes an outer cover, which is connected to the side of the reflector and forms a closed space together with the reflector. The phase shift arm module, the passive antenna module and the active radiation unit are located in the closed space.

6. The multi-frequency antenna device according to claim 2, wherein: The passive antenna module includes the passive radiation unit, a bracket and a signal adapter; The bracket is installed on the first phase shift arm or the second phase shift arm; the passive radiation unit is installed on the bracket; a mounting groove is provided on the bracket, a first end of the mounting groove extends to the position of the passive radiation unit, and a second end of the mounting groove extends to the position of the first phase shift arm or the second phase shift arm; the signal adapter is provided in the mounting groove, and is electrically connected to the passive radiation unit through the first end of the mounting groove, and is electrically connected to the phase shifter module through the second end of the mounting groove.

7. The multi-frequency antenna device according to claim 6, wherein: The bracket includes a support plate, one end of the support plate is mounted on the first phase shift arm or the second phase shift arm, and the other end is provided with a bending portion bent toward the inner side of the frame structure relative to the support plate, and the passive radiation unit is mounted on the bending portion; The mounting groove extends through the support plate and the bent portion.

8. The multi-frequency antenna device according to claim 1, wherein: The projection of the passive antenna module onto the reflector falls into the reflector.

9. The multi-frequency antenna device according to claim 1, wherein: The active antenna module comprises at least one queue composed of a plurality of active radiation units and at least one remote radio frequency unit; Each of the remote radio frequency units is arranged on a side of the reflector away from the active radiation unit, and each of the remote radio frequency units corresponds to each of the queues one by one.

10. A base station antenna, wherein: It comprises the multi-frequency antenna device as claimed in any one of claims 1 to 9.

11. A reflector for testing, wherein: Used to test the passive antenna module; one end of the test reflector is provided with a test interface for electrically connecting to the test equipment; The passive antenna module is installed on the phase shift arm module, which is installed on the side of the test reflector during testing, and a phase shifter module is integrated in the phase shift arm module; the passive radiation unit in the passive antenna module is electrically connected to the phase shifter module.

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