Filter antenna integrated structure

Abstract

The application discloses a filter antenna integrated structure, comprising an antenna structure, a filter, a connector and a baseband board; the filter is arranged between the baseband board and the antenna structure; the antenna structure comprises a metal strip line assembly, the metal strip line assembly is provided with a feeding loop and a power division network connected with the feeding loop; the filter comprises a filter body, a first cavity and a second cavity; the first cavity is located on one side of the filter body close to the metal strip line assembly; the second cavity is located on one side of the filter body close to the baseband board; the connector comprises an antenna end connector and a power amplifier end connector; one end of the antenna end connector is connected with the first cavity, and the other end is connected with the metal strip line assembly; one end of the power amplifier end connector is connected with the second cavity, and the other end is connected with a power amplifier end of the baseband board. According to the application, the path of signal transmission is shortened, and the loss of the signal is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 5G, in particular to a filter antenna integrated structure. BACKGROUND

[0002] The AFU (filter antenna integrated structure) antenna structure is a new type of 5G antenna structure, which comprises a dipole power division network, a coupling calibration network and a filter. By integrating the above components, the cost is reduced to the greatest extent, the weight is reduced, and the product volume is reduced. It is one of the important directions of 5G antenna structure technology research and development.

[0003] The current filter antenna integrated structure is mainly a printed circuit board antenna structure. The front surface is an antenna structure feed network. The ceramic filter is welded on the back surface of the printed circuit board antenna structure. The signal at the power amplifier end is connected from the back surface of the printed circuit board, then passes through the filter, and then enters the antenna structure feed network on the front surface of the printed circuit board. The signal is transmitted. The receiving path is opposite to the transmitting path. In this way, the path of the signal is too long, and the signal at the power amplifier end needs to pass through a printed circuit board line to enter the filter. The long line has large signal loss. How to design a low-height and low-loss AFU antenna structure has become a problem to be solved in the field. SUMMARY

[0004] The purpose of the present application is to provide a filter antenna integrated structure to shorten the signal transmission path and reduce signal loss.

[0005] The present application discloses a filter antenna integrated structure, comprising an antenna structure, a filter, a connector and a baseband board. The filter is arranged between the baseband board and the antenna structure. The antenna structure comprises a metal strip line assembly, and a feed ring and a power division network connected to the feed ring are arranged on the metal strip line assembly. The filter comprises a filter body, a first cavity and a second cavity. The first cavity is located on one side of the filter body close to the metal strip line assembly, and the second cavity is located on the other side of the filter body close to the baseband board. The connector comprises an antenna end connector and a power amplifier end connector. One end of the antenna end connector is connected to the first cavity, and the other end is connected to the metal strip line assembly. One end of the power amplifier end connector is connected to the second cavity, and the other end is connected to the power amplifier end of the baseband board.

[0006] Optionally, the filter is a dielectric ceramic filter; the antenna structure further comprises an antenna cover, an antenna cover plate and an antenna bottom plate, the antenna cover plate is arranged correspondingly with the antenna bottom plate, the metal strip assembly is arranged between the antenna cover plate and the antenna bottom plate, and the antenna cover plate and the antenna bottom plate press the metal strip assembly, and the antenna cover is arranged outside the antenna cover plate.

[0007] Optionally, the metal strip assembly comprises a metal strip and an insulating pad, the metal strip constitutes the feed ring and the power division network, the insulating pad has two layers, and the metal strip is clamped between the two layers of the insulating pad; one end of the antenna end connector passes through the antenna bottom plate and the insulating pad in sequence and abuts against the metal strip.

[0008] Optionally, the metal strip is a metal sheet, and the insulating pad is made of foam material.

[0009] Optionally, the metal strip comprises a plurality of feed rings and the power division network connecting adjacent feed rings, a plurality of pits are formed directly below the feed ring, and a plurality of bosses corresponding to the pits are formed on the back of the antenna bottom plate; connecting two rows of adjacent bosses forms a groove, and the filter is embedded in the groove.

[0010] Optionally, the filter-antenna integrated structure further comprises a fixing cover plate, the fixing cover plate is arranged on the side of the filter away from the antenna bottom plate and connected with the antenna bottom plate, and is used for pressing the filter.

[0011] Optionally, the fixing cover plate is made of metal conductive material, conductive cotton is placed between the filter and the fixing cover plate, and the filter is grounded through the conductive cotton and the fixing cover plate.

[0012] Optionally, one end of the antenna end connector connected with the filter is a petal structure, and the other end is a spring probe structure, one end of the antenna end connector is clamped in the first cavity through the petal structure, and the other end abuts against the metal strip through the spring probe structure; one end of the power amplifier end connector connected with the filter is a petal structure, and the other end is a spring probe structure, one end of the power amplifier end connector is clamped in the second cavity through the petal structure, and the other end abuts against the baseband plate through the spring probe structure.

[0013] Optionally, one end of the power amplifier end connector connected with the baseband plate is provided with a low-pass connecting rod, and the power amplifier end connector is connected with the baseband plate through the low-pass connecting rod.

[0014] Optionally, the antenna structure further comprises a directing sheet, the directing sheet is a metal sheet, the directing sheet is arranged on the side of the antenna cover plate away from the metal strip line assembly, between the antenna radome and the antenna cover plate; the antenna cover plate comprises two fixing parts, two ends of the antenna cover plate extend away from the metal strip line assembly to form the two fixing parts, the directing sheet is fixedly connected with the two fixing parts, and the directing sheet is arranged in parallel with the antenna cover plate; the antenna cover plate forms a window corresponding to the position of the feed ring.

[0015] The application improves the filter antenna integrated structure, by arranging a first cavity of the filter on the side of the filter close to the metal strip line assembly, and arranging a second cavity of the filter on the side of the filter close to the baseband plate, so that the connector can be connected to the first cavity and the second cavity of the filter respectively, so that the first cavity of the filter can be directly connected to the metal strip line assembly through the connector, and the second cavity of the filter is directly connected to the power amplifier end of the baseband plate through the connector, the metal strip line assembly replaces the originally required printed circuit board, and the signal does not need to pass through a printed circuit board line to enter the filter; the signal transmission path is shortened, and the signal loss is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings included are intended to provide a further understanding of the embodiments of the application, and constitute a part of the specification, used to illustrate the embodiments of the application, and together with the text description, to explain the principles of the application. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor. In the drawings:

[0017] Figure 1 is a schematic diagram of the filter antenna integrated structure of the first embodiment of the application;

[0018] Figure 2 is an exploded schematic diagram of the metal strip line assembly in the first embodiment of the application;

[0019] Figure 3 is an exploded schematic diagram of the metal strip line assembly, the antenna bottom plate and the fixing cover plate of the first embodiment of the application;

[0020] Figure 4 is a schematic diagram of the connector of another embodiment of the application.

[0021] Wherein, 10, filter antenna integrated structure; 100, antenna structure; 200, antenna cover; 300, metal strip assembly; 301, feed ring; 302, power division network; 303, boss; 310, metal strip; 320, insulating pad; 400, filter; 401, filter body; 450, low pass connecting rod; 410, first cavity; 420, second cavity; 430, antenna end connector; 440, power amplifier end connector; 431, petal structure; 441, spring type probe structure; 460, connector; 500, baseband board; 600, antenna cover plate; 610, fixed part; 700, antenna bottom plate; 710, fixed cover plate; 711, pit; 720, groove; 730, conductive cotton; 800, director; 810, through slot. DETAILED DESCRIPTION

[0022] It needs to be understood that the terms used herein, the specific structures and functional details disclosed, are only for the purpose of describing specific embodiments, and are representative, but the present application can be embodied in many alternative forms, and should not be interpreted as being limited to the embodiments described herein.

[0023] In the description of the present application, the terms "first", "second" are only for the purpose of description, and should not be understood as indicating relative importance, or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "includes" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can exist or be added.

[0024] In addition, the terms indicating the orientation or positional relationship of "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are described based on the orientation or relative position relationship shown in the drawings, and are only for the convenience of the simplified description of the present application, and do not indicate that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0027] Figure 1 This is a schematic diagram of the integrated filter and antenna structure according to the first embodiment of this application, as shown below. Figure 1 As shown, this application discloses an integrated filter-antenna structure 10, including an antenna structure 100, an radome 200, a filter 400, a connector 460, and a baseband board 500. The radome 200 is disposed outside the antenna structure 100, and the filter 400 is disposed between the baseband board 500 and the antenna structure 100. The antenna structure 100 includes a metal strip assembly 300, and the filter 400 is connected to the metal strip assembly 300. The filter 400 includes a filter body 401, a first cavity 410, and a second cavity. The filter body 420 has a first cavity 410 located on the side of the filter body 401 near the metal strip assembly 300, and a second cavity 420 located on the side of the filter body 401 near the baseband board 500. The connector 460 includes an antenna end connector 430 and a power amplifier end connector 440. One end of the antenna end connector 430 is connected to the first cavity 410 and the other end is connected to the metal strip assembly 300. One end of the power amplifier end connector 440 is connected to the second cavity 420 and the other end is connected to the power amplifier end of the baseband board 500.

[0028] Compared to the filter-antenna integrated structure 10, which uses a dielectric filter 400 soldered on a printed circuit board, with the first cavity 410 and the second cavity 420 on the same side, and then connected to another printed circuit board with an antenna structure, this application improves the filter-antenna integrated structure 10. The first cavity 410 of the filter 400 can be directly connected to the metal strip assembly 300 through the antenna connector 430, while the second cavity 420 of the filter 400 is directly connected to the power amplifier end of the baseband board 500 through the power amplifier connector 440. By using the metal strip assembly 300 to replace the originally required printed circuit board, and in conjunction with the improved design of the first cavity 410 and the second cavity 420, the following improvements are made:

[0029] By placing the first cavity 410 of the filter 400 on the side of the filter 400 near the metal strip assembly 300 and directly connecting it to the metal strip assembly 300, the signal transmission does not need to go through an additional section of the printed circuit board. The second cavity 420 of the filter 400 is placed on the side of the filter 400 near the baseband board 500 and directly connected to the baseband board 500, without needing to go through an additional section of the printed circuit board, thus shortening the signal transmission path and reducing signal loss.

[0030] In the application, a plurality of cavities are arranged on the filter, the first cavity and the second cavity are respectively the first cavity and the tail cavity in the plurality of cavities, of course, the first cavity is the tail cavity, and the second cavity can also be the first cavity.

[0031] Figure 2 FIG. 1 is a schematic diagram of a metal strip line assembly in a second embodiment of the application, Figure 2 In combination Figure 1 As shown in the drawings, the filter 400 mentioned in the application is mainly a dielectric ceramic filter 400, but is not limited to the dielectric ceramic filter 400. The dielectric ceramic filter 400 has good performance, but in the prior art, the dielectric ceramic filter is often welded to a printed circuit board, and the expansion coefficients of the printed circuit board and the dielectric ceramic are different, which can easily crack and fail after long-term thermal expansion and contraction. The filter of the application arranges the first cavity and the tail cavity on the upper and lower surfaces respectively, and combines the antenna structure of the metal strip line assembly to abut together, without welding, thereby avoiding the above problems.

[0032] Specifically, the antenna structure 100 further includes an antenna cover plate 600 and an antenna bottom plate 700, the antenna cover plate 600 is arranged correspondingly to the antenna bottom plate 700, the metal strip line assembly 300 is arranged between the antenna cover plate 600 and the antenna bottom plate 700, and the antenna cover plate 600 and the antenna bottom plate 700 press the metal strip line assembly 300.

[0033] The antenna cover plate 600 in the application is a thin aluminum plate punched, and the metal strip line assembly 300 is accommodated in the space formed between the antenna cover plate 600 and the antenna bottom plate 700; such a design, through the antenna cover plate 600 and the antenna bottom plate 700, enables the metal strip line assembly 300 to be fixed without welding; of course, other fixing methods can also be used.

[0034] In addition, the design of the antenna bottom plate and the antenna cover plate can prevent the metal strip line assembly 300 from shaking, causing position deviation or falling off of the metal strip line assembly 300 due to external factors during long-term use of the filter antenna integrated structure 10, and avoid the occurrence of virtual connection or normal connection of the antenna end connector 430 when connected to the metal strip line assembly 300; further improve the stability of the connection between the antenna structure end filter 400 and the metal strip line assembly 300, and ensure the stability of signal transmission.

[0035] As Figure 2 shown, the metal strip line assembly 300 includes a metal strip line 310 and an insulating pad 320, the insulating pad 320 has two layers, and the metal strip line 310 is clamped between the two layers of insulating pad 320; one end of the antenna end connector 430 passes through the antenna bottom plate 700 and the insulating pad 320 in sequence and abuts against the metal strip line 310.

[0036] The present application replaces the original printed circuit board with the metal strip assembly 300, only the metal strip line 310 that needs to be connected is retained, the outer shell part of the original printed circuit board is replaced with two layers of insulating pads 320, the metal strip line 310 is clamped between the two layers of insulating pads 320, one end of the antenna end connector 430 is connected to the first cavity 410 of the filter 400, the other end directly penetrates through the antenna bottom plate 700 and the insulating pad 320, and abuts onto the metal strip line 310 to be connected with the metal strip line 310. In this way, the signal transmitted by the filter 400 is directly transmitted to the metal strip line 310 through the antenna end connector 430, greatly shortening the signal transmission path and reducing the loss and consumption in the signal transmission process; further improving the working efficiency of the filter antenna integrated structure 10. Such a design can avoid the problem of signal transmission path being too long in the filter antenna integrated structure in which the dielectric filter 400 is welded on the printed circuit board on the same side of the first cavity 410 and the second cavity 420, and then connected with another printed circuit board provided with an antenna structure, the signal needs to be accessed from the back of the printed circuit board, then passes through the filter 400, and then enters the antenna structure feed network on the front of the printed circuit board. The loss problem occurring in the signal transmission process is reduced or even avoided, and the interference problem is also reduced or even avoided.

[0037] Moreover, the two layers of insulating pads 320 clamp the metal strip line 310 between the two layers of insulating layers from above and below the metal strip line 310, effectively supporting and limiting the fixing of the metal strip line 310, so that the metal strip line 310 is not easy to move or fall off in the insulating pad 320, ensuring the stability of the structure of the metal strip assembly 300; at the same time, it ensures that when the antenna end connector 430 is directly connected to the metal strip line 310, the position of the metal strip line 310 will not move, causing the antenna end connector 430 to be virtually connected or unable to be effectively connected with the metal strip line 310.

[0038] The insulating pad 320 itself has an insulating effect, which can avoid signal interference during signal transmission, reduce signal loss when passing through the metal strip line 310, ensure the stability of signal transmission, and make the filter antenna integrated structure 10 simpler.

[0039] The metal strip line 310 in the present application is a metal sheet, which can be an aluminum sheet or a copper sheet, and can be processed by etching or mold cutting. The insulating pad 320 is made of foam material, and the insulating pad 320 can be made of PEI foam or PMI foam. The insulating pad 320 and the metal strip line 310 are fixed by plastic pins, so that the insulating pad 320 and the metal strip line 310 are not easy to fall off and are more firmly fixed. Other fixing methods such as back glue fixing can also achieve the above effects, which will not be described here.

[0040] As shown in Figure 1 combination Figure 2 , in this application, the filter antenna integrated structure 10 further comprises a director sheet 800, the director sheet 800 is a metal sheet, the antenna cover plate 600 comprises two fixed parts 610, the two ends of the antenna cover plate 600 extend to the antenna structure 100 direction to form two fixed parts 610, the director sheet 800 is fixedly connected with the two fixed parts 610, and the director sheet 800 is arranged in parallel with the antenna cover plate 600; the antenna cover plate 600 forms a window corresponding to the position of the feed ring 301.

[0041] The director sheet 800 is a metal sheet parallel to the metal strip line 310, which is located directly above the feed ring 301 of the metal strip line 310, and the material of the director sheet 800 is a good electrical conductor, such as copper, aluminum, etc. In actual application, considering the stability, feasibility and weight of the structure, etc., a double-sided copper-clad dielectric substrate is generally used. The director sheet 800 is used to improve the signal transmission effect and enhance the use performance of the filter antenna integrated structure 10.

[0042] Two through slots 810 can be provided on the director sheet 800, and the two fixed parts 610 extending out of the antenna cover plate 600 pass through the two barrel slots and are clamped with the director sheet 800. The director sheet 800 is clamped on the antenna cover plate 600 in a buckle manner, so that the connection between the director sheet 800 and the antenna cover plate 600 is simpler, and disassembly and installation are facilitated. When the director sheet 800 is damaged during long-term use, the director sheet 800 can be replaced from the antenna cover plate 600, and a new director sheet 800 is replaced, so that maintenance can be performed in time to ensure the stability of signal transmission and not affect the use of the filter antenna integrated structure 10.

[0043] At the same time, the director sheet 800 and the antenna cover plate 600 are fixed in a buckle manner, which can be suitable for director sheets 800 of various specifications and thicknesses, and has strong universality.

[0044] In addition, the antenna cover plate 600 and the director sheet 800 can also be installed in a laser welding manner, so that the connection between the director sheet 800 and the antenna cover plate 600 is more firm, the director sheet 800 is not easy to fall off from the antenna cover plate 600, and the stability of the filter antenna integrated structure 10 is ensured, and the signal transmission stability of the filter antenna integrated structure 10 is further improved.

[0045] Figure 3 is a disassembly schematic view of the metal strip line assembly, the antenna bottom plate and the fixed cover plate of the third embodiment of the present application, as Figure 3As shown, the main difference between the third embodiment and the first and second embodiments is that the metal strip line assembly 300 is provided with a plurality of feed rings 301 and a power division network 302 connecting adjacent feed rings 301, a plurality of pits 711 are formed directly below the feed rings 301, and a plurality of bosses 303 corresponding to the pits 711 are formed on the back of the antenna base plate 700; two rows of adjacent bosses 303 are connected to form a groove 720, and the filter is embedded in the groove.

[0046] The metal strip line assembly 300 is close to the surface of the antenna base plate 700, and the cavity depth corresponding to the position of the power division network 302 is smaller than the cavity depth corresponding to the position of the feed ring 301, the shape of the antenna base plate 700 matches the surface of the metal strip line assembly 300 close to the antenna base plate 700, forming a plurality of bosses 303, and a groove 720 is formed between adjacent bosses 303; the filter 400 is embedded in the groove 720.

[0047] In the filter antenna integrated structure 10, the metal strip line 310 includes a plurality of feed rings 301 and a power division network 302 connecting the feed rings 301. Generally, the cavity depth of the back of the power division network 302 is smaller than the cavity depth of the back of the feed ring 301, so that the back of the antenna base plate 700 has a plurality of bosses 303, and the groove 720 is formed by the intermediate gap of these bosses 303. Placing the filter 400 in the groove 720 makes the total height of the filter antenna integrated structure 10 smaller.

[0048] In combination Figure 1 And Figure 3 As shown, the filter antenna integrated structure 10 further includes a fixed cover plate 710, which is arranged on the side of the filter 400 away from the antenna base plate 700, connected with the antenna base plate 700, and used to press the filter 400.

[0049] When the filter 400 is placed in the groove 720, during the use of the filter antenna integrated structure 10, the filter antenna integrated structure 10 may be shaken due to external factors, and long-term shaking may cause the filter 400 to come off from the groove 720. Therefore, the fixed cover plate 710 is installed on the groove 720 to press the filter 400 and restrict the filter 400 in the groove 720, preventing the filter 400 from shaking and avoiding unstable signal transmission of the filter 400. Further improve the stability of the filter antenna integrated structure 10 and the stability of signal transmission.

[0050] Further, the fixed cover plate 710 is made of a metal conductive material, the filter 400 is provided with a silver plating layer close to the surface of the fixed cover plate 710, and the conductive cotton 730 is placed between the filter 400 and the fixed cover plate 710. The conductive cotton 730 is used to communicate the silver plating layer with the fixed cover plate 710 to ground. Of course, the silver plating layer is not provided, and the structure of the filter that needs to be grounded can also be directly grounded through the fixed cover plate 710.

[0051] The conductive cotton 730 can be a conductive sponge or conductive foam produced by a high polymer composite foaming technology. For example, when the conductive cotton 730 is a conductive sponge, the conductive sponge has uniform foaming pore diameter, softness, elasticity, and no desquamation, so that the uniform distribution of the conductive sponge can effectively protect the filter 400 in the groove 720 and prevent the electrical elements on the filter 400 from being corroded, effectively prolonging the service life of the filter 400, further improving the signal transmission stability of the filter antenna integrated structure 10, so that the signal will not be unable to be effectively transmitted due to corrosion of the structure of the filter 400 in the transmission process. Further improve the service life of the filter 400 and the performance stability of the filter antenna integrated structure 10.

[0052] Figure 4 The connector of the fourth embodiment of the present application is shown in FIG. 8. Figure 4

[0053] The one end of the antenna end connector 430 connected with the filter 400 is a petal structure 431, and the other end is a spring type probe structure 441. One end of the antenna end connector 430 is clamped in the first cavity 410 through the petal structure 431, and the other end is abutted to the metal strip line 310 through the spring type probe structure 441. The one end of the power amplifier end connector 440 connected with the filter 400 is a petal structure 431, and the other end is a spring type probe structure 441. One end of the power amplifier end connector 440 is clamped in the second cavity 420 through the petal structure 431, and the other end is abutted to the baseband plate 500 through the spring type probe structure 441.

[0054] Compared with other embodiments, the main difference of the present embodiment is that the one end of the power amplifier end connector 440 connected with the filter 400 and the one end of the antenna end connector 430 connected with the filter 400 are both petal structures 431; the petal structures 431 are clamped in the first cavity 410 and the second cavity 420 respectively, and the other end of the power amplifier end connector 440 and the antenna end connector 430 are both spring type probe structures 441, which are abutted to the metal strip line 310 and the baseband plate 500 respectively.

[0055] ​In order to realize better connection between the connector 460 and the filter 400, and better conduction between the connector 460 and the antenna structure 100 and the baseband board 500, the two connecting ends of the connector 460 are improved. First, the end of the filter 400 connected with the power amplifier end connector 440 and the antenna end connector 430 is provided with a petal structure 431.

[0056] In addition, the shapes of the inlets and outlets of the first cavity 410 and the second cavity 420 are designed as circular through holes or circular blind hole petal structures 431, the sizes of which are slightly larger than those of the first cavity 410 and the second cavity 420. The connecting ends of the petal structure 431 are used to insert the power amplifier end connector 440 and the antenna end connector 430 into the inlets and outlets of the first cavity 410 and the second cavity 420 of the filter 400, so that the power amplifier end connector 440 and the antenna end connector 430 are buckled together with the filter 400. The end of the antenna end connector 430 connected with the metal strip 310 and the end of the power amplifier end connector 440 connected with the baseband board 500 are provided with spring type probe structures 441. The spring type probe structure 441 is formed by precisely riveting and pre-pressing three basic components, i.e. a needle shaft, a spring and a needle tube, and has a precise spring structure inside. The surface plating layer of the spring type probe structure 441 is generally gold-plated, which can better improve its corrosion resistance, electrical performance and the like. The connecting end of the spring type probe structure 441 can improve the corrosion resistance, stability and durability of the power amplifier end connector 440 and the antenna end connector 430. In addition, the spring type probe structure 441 can reduce the weight and the size of the appearance of the power amplifier end connector 440 and the antenna end connector 430, and make them more delicate and beautiful.

[0057] In addition, as shown in Figure 1 and Figure 4 The end of the power amplifier end connector 440 connected with the baseband board 500 is provided with a low-pass connecting rod 450. The power amplifier end connector 440 is connected with the baseband board 500 through the low-pass connecting rod 450. The low-pass connecting rod 450 is used to connect with the filter 400 to form a low-pass filter 400, which is used to filter high-frequency noise in signal transmission and improve the performance of signal transmission. The low-pass connecting rod can be in a cylindrical structure. In addition, according to actual needs, a high-pass connecting rod can also be used in the present application, which is determined according to the use environment, and the present application does not make specific limitations.

[0058] It should be noted that the inventive concept of the present application can form a very large number of embodiments, but the length of the application file is limited and cannot list them one by one, so under the premise of not conflicting, the above described various embodiments or various technical features can be combined to form new embodiments, and the combination of each embodiment or technical feature will enhance the original technical effect.

[0059] The above is a further detailed description of the present application in combination with specific optional embodiments, and cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. A filter antenna integrated structure comprising an antenna structure, a filter, a connector, and a baseband board; the filter is disposed between the baseband board and the antenna structure, characterized in that, The antenna structure comprises a metal strip line assembly, a feeding ring and a power division network connected to the feeding ring are arranged on the metal strip line assembly; the filter comprises a filter body, a first cavity and a second cavity, the first cavity is located on a side of the filter body close to the metal strip line assembly, and the second cavity is located on a side of the filter body close to the baseband board; the connector comprises an antenna end connector and a power amplifier end connector, one end of the antenna end connector is connected to the first cavity, and the other end is connected to the metal strip line assembly, one end of the power amplifier end connector is connected to the second cavity, and the other end is connected to the power amplifier end of the baseband board; The filter is a dielectric ceramic filter; the antenna structure further comprises an antenna cover, an antenna cover plate and an antenna bottom plate, the antenna cover plate and the antenna bottom plate are arranged correspondingly, the metal strip line assembly is arranged between the antenna cover plate and the antenna bottom plate, and the antenna cover plate and the antenna bottom plate press the metal strip line assembly, and the antenna cover is arranged outside the antenna cover plate; The metal strip line assembly comprises a metal strip line and an insulating pad, the metal strip line constitutes the feeding ring and the power division network, and the metal strip line is clamped between the two layers of the insulating pad; one end of the antenna end connector passes through the antenna bottom plate and the insulating pad in sequence and abuts against the metal strip line; The transmitted signal of the filter is directly transmitted to the metal strip line through the antenna end connector; The surface of the metal strip line assembly close to the antenna bottom plate has a cavity depth corresponding to the position of the power division network smaller than a cavity depth corresponding to the position of the feeding ring, the shape of the antenna bottom plate matches the surface of the metal strip line assembly close to the antenna bottom plate, a plurality of bosses are formed, and a plurality of grooves are formed between adjacent bosses; the filter is embedded in the grooves.

2. The filter antenna integrated structure according to claim 1, wherein The metal strip line is a metal sheet, and the insulating pad is a foam material.

3. The filter antenna integrated structure according to claim 1, wherein The metal strip line comprises a plurality of feeding rings and the power division network connecting adjacent feeding rings, a plurality of pits are formed directly below the feeding rings, and a plurality of bosses corresponding to the pits are formed on the back surface of the antenna bottom plate; a groove is formed by connecting two rows of adjacent bosses, and the filter is embedded in the groove.

4. The filter antenna integrated structure according to claim 3, wherein The filter-antenna integrated structure further comprises a fixing cover plate, the fixing cover plate is arranged on a side of the filter away from the antenna bottom plate, is connected to the antenna bottom plate and is used for pressing the filter.

5. The filter antenna integrated structure according to claim 4, wherein The fixing cover plate is made of a metal conductive material, conductive cotton is arranged between the filter and the fixing cover plate, and the filter is grounded through the conductive cotton and the fixing cover plate.

6. The filter antenna integrated structure according to claim 1, wherein The antenna end connector is connected with one end of the filter, and the other end of the filter is connected with the spring type probe structure, one end of the antenna end connector is clamped to the first cavity through the petal structure, and the other end of the antenna end connector is abutted to the metal strip line through the spring type probe structure; the power amplifier end connector is connected with one end of the filter, and the other end of the filter is connected with the spring type probe structure, one end of the power amplifier end connector is clamped to the second cavity through the petal structure, and the other end of the power amplifier end connector is abutted to the baseband plate through the spring type probe structure.

7. The filter antenna integrated structure according to claim 1, wherein One end of the power amplifier end connector connected with the baseband plate is provided with a low-pass connecting rod, and the power amplifier end connector is connected with the power amplifier end of the baseband plate through the low-pass connecting rod.

8. The filter antenna integrated structure according to claim 1, wherein The antenna structure further comprises a directing sheet, the directing sheet is a metal sheet, the directing sheet is arranged on the side of the antenna cover plate away from the metal strip line assembly, and is located between the antenna cover and the antenna cover plate; the antenna cover plate comprises two fixing portions, two ends of the antenna cover plate extend away from the metal strip line assembly to form two fixing portions, the directing sheet is fixedly connected with the two fixing portions, and the directing sheet is arranged in parallel with the antenna cover plate; the antenna cover plate forms a window corresponding to the position of the feed ring.

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