Antenna with integrated filter

Abstract

The present invention discloses an antenna with an integrated filter, which includes a radiation unit, a feed network board and a cavity filter, wherein the feed network board is arranged at the bottom of the radiation unit and connected to the radiation unit, the cavity filter is arranged at the bottom of the feed network board and connected to the feed network board, and the cavity filter is provided with a first metal surface arranged toward the feed network board, and the first metal surface is used as a reflection surface of the radiation unit. The antenna with an integrated filter can effectively save cable jumpers and connectors between the antenna and the filter, greatly reduce the difficulty of installing the antenna with an integrated filter, and is conducive to reducing losses.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to an antenna with integrated filter. Background Art

[0002] In the field of small active equipment coverage, hereinafter referred to as micro-stations, antennas, filters, and active equipment have long been produced, installed, and used separately, with each component realizing its own function, especially the filter and antenna are connected by cable jumpers through connectors and waterproofed separately. However, with the increase in application frequency and the increase in the number of ports, installation and combination are becoming increasingly difficult. Summary of the invention

[0003] Based on this, it is necessary to provide an antenna with an integrated filter. The antenna with an integrated filter can effectively save cable jumpers and connectors between the antenna and the filter, greatly reduce the difficulty of installation, and is conducive to reducing losses.

[0004] The technical solution is as follows:

[0005] On the one hand, the present application provides an antenna with an integrated filter, comprising a radiating unit, a feed network board and a cavity filter, wherein the feed network board is arranged at the bottom of the radiating unit and connected to the radiating unit, the cavity filter is arranged at the bottom of the feed network board and connected to the feed network board, and the cavity filter is provided with a first metal surface arranged toward the feed network board, and the first metal surface is used as a reflecting surface of the radiating unit.

[0006] When the antenna with integrated filter is used, the feed network board is fixed on the first metal surface of the cavity filter, and the radiation unit is installed at the preset position of the feed network board, so that the first metal surface can be used as the reflection surface of the radiation unit, and the cavity filter and the radiation unit are connected through the feed network board, and the assembly of the micro station antenna can be completed. Compared with the traditional technology, the antenna with integrated filter can effectively save the cable jumper and connector between the antenna and the filter, greatly reducing the difficulty of installation.

[0007] The technical solution is further described below:

[0008] In one of the embodiments, the cavity filter is further provided with a side wall protruding from the first metal surface, the side wall is provided with a second metal surface, and the second metal surface is used as a reflection boundary.

[0009] In one of the embodiments, the cavity filter is a metal cavity filter.

[0010] In one of the embodiments, the antenna of the integrated filter further comprises an antenna cover, and the antenna cover cooperates with the first metal surface to cover the radiation unit.

[0011] In one embodiment, the cavity filter includes a cavity, a resonant column, a cover plate and a tuning component. The cavity is a hollow structure with an opening on one side. A plurality of resonant cavities are arranged in the cavity. The resonant column is arranged in the resonant cavity. The cover plate covers the opening of the cavity. The tuning component is retractably arranged on the cover plate. The first metal surface is arranged on the outer wall of the cavity corresponding to the cover plate.

[0012] In one of the embodiments, the feed network board further includes an insulating dielectric board and a feed line layer printed on the insulating dielectric board.

[0013] In one of the embodiments, the insulating dielectric board is provided with a mounting hole for mounting the radiation unit, the mounting hole is a metal via, and the feeder circuit layer is electrically connected to the radiation unit circuit layer through the metal via.

[0014] In one of the embodiments, the insulating dielectric plate is provided with a second mounting hole, and the second mounting hole is a metal via; and the cavity filter is provided with a conductive protrusion electrically connected to the second mounting hole.

[0015] In one of the embodiments, the insulating dielectric board is provided with a power divider circuit layer, and the radiation unit is electrically connected to the corresponding power divider circuit layer.

[0016] In one embodiment, there are at least two radiation units arranged in an antenna array; and at least one column of the antenna array is disposed on the first metal surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an antenna with an integrated filter in an embodiment;

[0018] Figure 2 for Figure 1 A schematic structural diagram of the antenna with integrated filter shown in another perspective;

[0019] Figure 3 for Figure 1 A partial enlarged schematic diagram shown;

[0020] Figure 4 for Figure 1 An exploded schematic diagram of the structure of the antenna with integrated filter shown;

[0021] Figure 5 for Figure 4 A partial enlarged schematic diagram of B is shown.

[0022] Description of reference numerals:

[0023] 100, cavity filter; 110, first metal surface; 112, third mounting hole; 120, second metal surface; 130, conductive protrusion; 140, cover plate; 150, tuning component; 200, feed network board; 210, insulating dielectric board; 212, first mounting hole; 220, feed circuit layer; 230, power divider circuit layer; 300, radiation unit; 400, antenna cover. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0025] It should be noted that when an element is referred to as being "fixed to", "disposed on", "fixed on" or "installed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is perpendicular, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] The “first” and “second” involved in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0028] In the field of small antennas, antennas, filters, and small active devices generally form a complete coverage device. As the frequency band of antennas increases and the number of ports increases, it becomes increasingly difficult to arrange multiple connectors in a smaller and smaller space. Based on this, the present application provides an antenna with an integrated filter that can adapt to the increase in antenna frequency bands and complete installation in a narrow space.

[0029] like Figures 1 to 4As shown, the present application provides an antenna with an integrated filter, including a radiation unit 300, a feed network board 200 and a cavity filter 100, wherein the feed network board 200 is arranged at the bottom of the radiation unit 300 and is connected to the radiation unit 300, the cavity filter 100 is arranged at the bottom of the feed network board 200 and is connected to the feed network board 200, and the cavity filter 100 is provided with a first metal surface 110 arranged toward the feed network board 200, and the first metal surface 110 is used as a reflection surface of the radiation unit 300.

[0030] When the antenna with the integrated filter is used, the feed network board 200 is fixed on the first metal surface 110 of the cavity filter 100, and then the radiation unit 300 is installed at the preset position of the feed network board 200, so that the first metal surface 110 can be used as the reflection surface of the radiation unit 300, and the cavity filter 100 and the radiation unit 300 are connected through the feed network board 200, and the assembly of the micro station antenna can be completed. Compared with the traditional technology, the antenna with the integrated filter can effectively save the cable jumpers and connectors between the antenna and the filter, greatly reduce the difficulty of installation, can be installed in a narrow space, can adapt to the problem of complex feeding lines caused by the increase of antenna frequency bands, and is conducive to reducing losses and improving the reliability of signal radiation.

[0031] It should be noted that the feeding unit on the feeding network board 200 may be a conductive layer on a circuit board, or may be implemented by a simple coaxial feeding method such as a pin.

[0032] Based on the above embodiments, Figures 1 to 3 As shown, in one embodiment, the antenna of the integrated filter further includes an antenna cover 400, which cooperates with the first metal surface 110 to cover the radiation unit 300. In this way, the antenna cover 400 and the first metal surface 110 form a protective cavity for the radiation unit 300, and the feeding unit is also arranged in the protective cavity, which is easy to take waterproof measures.

[0033] Furthermore, in one embodiment, the radome 400 and the cavity filter 100 are sleeved together to form a protective cavity, which is conducive to better waterproofing.

[0034] Furthermore, if Figure 1 As shown, in one embodiment, the first metal surface 110 is provided with a third mounting hole 112, and the antenna cover 400 is provided with a threaded hole corresponding to the third mounting hole 112. In this way, bolts are passed through the connection holes 112 and matched with the threaded holes, thereby fixing the antenna cover 400 and the cavity filter 100.

[0035] Based on any of the above embodiments, Figure 4As shown, in one embodiment, the cavity filter 100 is further provided with a side wall protruding from the first metal surface 110, and the side wall is provided with a second metal surface 120, and the second metal surface 120 is used as a reflection boundary. In this way, a reflection boundary can also be formed on the cavity filter 100, further optimizing the antenna of the integrated filter.

[0036] Based on any of the above embodiments, in one embodiment, the cavity filter 100 is a metal cavity filter 100. In this way, the first metal surface 110 and the second metal surface 120 can be directly processed on the cavity of the cavity filter 100 to improve assembly efficiency.

[0037] Of course, in other embodiments, the first metal surface 110 and the second metal surface 120 may be assembled on the cavity filter 100 , such as printed or electroplated on the outer surface of the cavity filter 100 .

[0038] Based on any of the above embodiments, Figure 2 As shown, in one embodiment, the cavity filter 100 includes a cavity (not marked), a resonant column (not shown), a cover plate 140 and a tuning element 150. The cavity is a hollow structure with an opening on one side. A plurality of resonant cavities are arranged in the cavity. The resonant column is arranged in the resonant cavity. The cover plate 140 covers the opening of the cavity. The tuning element 150 is retractably arranged on the cover plate 140. The first metal surface 110 is arranged on the outer wall of the cavity corresponding to the cover plate 140. In this way, the tuning element 150 can be used to debug the index of the filter, making it easier to debug the antenna of the integrated filter; at the same time, the interference problem between the radiation unit 300 and the filter can be reduced, making the antenna performance better.

[0039] Furthermore, in one embodiment, the cover plate 140 is provided with a threaded through hole (not shown), and the tuning member 150 is provided with a screw rod matched with the threaded through hole. Thus, through the cooperation between the screw rod and the threaded through hole, the tuning member 150 can realize the telescopic operation of turning and stopping immediately.

[0040] Based on any of the above embodiments, Figure 3 and Figure 4 As shown, in one embodiment, the feed network board 200 further includes an insulating dielectric board 210 and a feed line layer 220 printed on the insulating dielectric board 210 .

[0041] Furthermore, if Figure 4 and Figure 5As shown, in one embodiment, the insulating dielectric plate 210 is provided with a first mounting hole 212 for mounting the radiation unit 300, the mounting hole is a metal via, and the feeder circuit layer 220 is electrically connected to the circuit layer of the radiation unit 300 through the metal via. In this way, the first mounting hole 212 is used to facilitate fixing the radiation unit 300 on the insulating dielectric plate 210, and at the same time, the electrical connection between the feeder circuit layer 220 and the radiation unit 300 is realized, which is conducive to further reducing insertion loss.

[0042] Furthermore, if Figure 5 As shown, in one embodiment, the insulating dielectric plate 210 is provided with a second mounting hole (not shown), and the second mounting hole is a metal via; the cavity filter 100 is provided with a conductive protrusion 130 electrically connected to the second mounting hole. In this way, through the electrical connection between the second mounting hole and the conductive protrusion 130, a direct electrical connection between the cavity filter 100 and the feed line layer 220 is achieved, further reducing cables, reducing insertion loss, and facilitating intermodulation.

[0043] The conductive protrusion 130 is a metal connecting column or the like.

[0044] Based on any of the above embodiments, Figure 3 As shown, in one embodiment, the insulating dielectric board 210 is provided with a power divider circuit layer 230, and the radiating unit 300 is electrically connected to the corresponding power divider circuit layer 230. In this way, the cable jumper and connector between the radiating unit 300 and the filter connection can be effectively saved, which is beneficial to reducing the connection loss and improving the antenna gain.

[0045] Furthermore, in one embodiment, the power divider is provided with a soldering pad (not shown) and a connecting hole (not shown) arranged on the soldering pad, and the radiation unit 300 can be inserted into the connecting hole through a feeding pole, so that the electrical connection between the power divider and the radiation unit 300 can be achieved by welding and fixing.

[0046] Of course, the electrical connection between the feeding unit and the cavity filter 100 can also be installed in the above manner.

[0047] Based on any of the above embodiments, Figure 1 As shown, in one embodiment, there are at least two radiating units 300, which are arranged in an antenna array; at least one column of the antenna array is disposed on the first metal surface 110. In this way, an antenna array can be formed on the first metal surface 110 to achieve the integration of the antenna of the multi-frequency integrated filter.

[0048] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An antenna with integrated filter, characterized in that: include: Radiating unit; A feeding network board, which is arranged at the bottom of the radiating unit and connected to the radiating unit; A cavity filter, wherein the cavity filter is arranged at the bottom of the feed network board and connected to the feed network board, the cavity filter is provided with a first metal surface arranged toward the feed network board, and the first metal surface is used as a reflection surface of the radiation unit; the feed network board also includes an insulating dielectric board and a feed line layer printed on the insulating dielectric board; the insulating dielectric board is provided with a second mounting hole, and the second mounting hole is a metal via; the cavity filter is provided with a conductive protrusion electrically connected to the second mounting hole; The cavity filter comprises: a cavity and a cover plate; the cavity is a hollow structure with an opening on one side, and a plurality of resonant cavities are arranged in the cavity; the cover plate covers the opening of the cavity; and the first metal surface is arranged on the outer wall of the cavity corresponding to the cover plate.

2. The antenna with integrated filter according to claim 1, characterized in that: The cavity filter is further provided with a side wall protruding from the first metal surface, and the side wall is provided with a second metal surface, and the second metal surface is used as a reflection boundary.

3. The antenna with integrated filter according to claim 1, characterized in that: The cavity filter is a metal cavity filter.

4. The antenna with integrated filter according to claim 1, characterized in that: It also includes an antenna cover, which cooperates with the first metal surface and is used to cover the radiation unit.

5. The antenna with integrated filter according to claim 4, characterized in that: The antenna cover is sleeved and matched with the cavity filter to form a protective cavity.

6. The antenna with integrated filter according to claim 4, characterized in that: The first metal surface is provided with a third mounting hole, and the antenna cover is provided with a threaded hole corresponding to the third mounting hole.

7. The antenna with integrated filter according to claim 1, characterized in that: The cavity filter further comprises: a resonant column and a tuning component; the resonant column is arranged in the resonant cavity; and the tuning component is retractably arranged on the cover plate.

8. The antenna with integrated filter according to claim 1, characterized in that: The insulating dielectric plate is provided with a first mounting hole for mounting the radiation unit, the first mounting hole is a metal via, and the feeder circuit layer is electrically connected to the radiation unit circuit layer through the first mounting hole.

9. The antenna with integrated filter according to claim 1, characterized in that: The insulating dielectric board is provided with a power divider circuit layer, and the radiation unit is electrically connected to the corresponding power divider circuit layer.

10. The filter-integrated antenna according to any one of claims 1 to 9, characterized in that: There are at least two radiation units arranged in an antenna array; at least one column of the antenna array is disposed on the first metal surface.

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