Built-in antennas and communication equipment used in indoor distributed system products

Abstract

This invention provides a built-in antenna and communication device for use in indoor distributed antenna systems (DAS) products, relating to the technical field of communication. The device includes a feed line and a radiator; the radiator comprises a radiating surface connector and multiple radiating surfaces; the radiating surface connector is connected to at least two radiating surfaces, and the radiators are arranged in a uniformly distributed manner; one end of the feed line is connected to the radiating surface connector, and the other end is connected to the radio frequency signal transceiver terminal of a printed circuit board. Practice has proven that the built-in antenna used in indoor DAS products with the above structural features can meet the horizontal plane non-circularity requirement after simple adjustment of relevant dimensions, effectively alleviating the technical problem that built-in antennas used in existing indoor DAS products are difficult to meet the non-circularity requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of communication, and in particular to a built-in antenna and communication equipment used in indoor distributed system products. Background Art

[0002] In order to enhance the quality of indoor network coverage, indoor communication equipment has been developed. Indoor communication equipment has high requirements on the horizontal plane non-circularity of the antenna, and current solutions are difficult to meet the non-circularity index requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a built-in antenna and communication equipment used in a room-distributed system product, so as to alleviate the technical problem that the built-in antenna used in the room-distributed system product in the prior art is difficult to meet the non-circularity index requirements.

[0004] In the first aspect, the present invention provides a built-in antenna for use in a room distributed system product, comprising: a feeder and a radiator; the radiator comprises: a radiating surface connector and a plurality of radiating surfaces; the radiating surface connector is connected to at least two of the radiating surfaces, and the radiator is arranged in a uniformly distributed manner; one end of the feeder is connected to the radiating surface connector, and the other end of the feeder is connected to a radio frequency signal transceiver end of a printed circuit board.

[0005] In an optional implementation, the multiple radiation surfaces include: a first radiation surface and a second radiation surface.

[0006] In an optional embodiment, the radiating surface connector includes: a first conductor, a second conductor and a third conductor; the first end of the first conductor is connected to the first radiating surface, and the second end of the first conductor is connected to the first end of the second conductor; the first end of the third conductor is connected to the second radiating surface, and the second end of the third conductor is connected to the second end of the second conductor; the first conductor and the third conductor are away from the printed circuit board relative to the second conductor.

[0007] In an optional implementation, each of the radiating surfaces includes: at least one sub-radiating surface; the sub-radiating surfaces are connected in sequence on the same plane.

[0008] In an optional embodiment, the first radiating surface includes: a first sub-radiating surface, a second sub-radiating surface and a third sub-radiating surface; the second radiating surface includes: a fourth sub-radiating surface, a fifth sub-radiating surface and a sixth sub-radiating surface; the first sub-radiating surface, the second sub-radiating surface and the third sub-radiating surface are connected in sequence; the fourth sub-radiating surface, the fifth sub-radiating surface and the sixth sub-radiating surface are connected in sequence; the first end of the first conductor is connected to the first sub-radiating surface, and the first end of the third conductor is connected to the fourth sub-radiating surface.

[0009] In an optional embodiment, the built-in antenna used in the indoor distributed system product also includes: a first ground feed line and a second ground feed line; the radiating surface connector includes: a fourth conductor; the first radiating surface and the second radiating surface are respectively connected to the two ends of the fourth conductor; and the first radiating surface, the second radiating surface and the fourth conductor are on the same plane; one end of the first ground feed line is connected to the first radiating surface, and the other end of the first ground feed line is connected to the ground surface of the printed circuit board; one end of the second ground feed line is connected to the second radiating surface, and the other end of the second ground feed line is connected to the ground surface of the printed circuit board.

[0010] In an optional embodiment, the built-in antenna used in the indoor distributed system product also includes: a third ground feed line and a fourth ground feed line; the multiple radiating surfaces also include: a third radiating surface and a fourth radiating surface; the third radiating surface and the fourth radiating surface are parasitic on both sides of the fourth conductor; one end of the third ground feed line is connected to the third radiating surface, and the other end of the third ground feed line is connected to the ground surface of the printed circuit board; one end of the fourth ground feed line is connected to the fourth radiating surface, and the other end of the fourth ground feed line is connected to the ground surface of the printed circuit board.

[0011] In an optional implementation, the first end of the first conductor is connected to an edge of the first radiation surface.

[0012] In an optional implementation, the area of ​​the third radiation surface is smaller than that of the first radiation surface.

[0013] In a second aspect, the present invention provides a communication device, comprising a built-in antenna used in the indoor distributed system product described in any one of the aforementioned embodiments.

[0014] The built-in antenna used in the distributed indoor system product provided by the present invention includes: a feeder and a radiator; and the radiator includes: a radiating surface connector and multiple radiating surfaces; the radiating surface connector is connected to at least two radiating surfaces, and the radiator is arranged in a uniformly distributed manner; one end of the feeder is connected to the radiating surface connector, and the other end is connected to the RF signal transceiver end of the printed circuit board. Practice has proved that the built-in antenna used in the distributed indoor system product with the above structural features can meet the antenna's non-circularity index in the horizontal plane by simply adjusting the relevant dimensions, which effectively alleviates the technical problem that the built-in antenna used in the distributed indoor system product in the prior art is difficult to meet the non-circularity index requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a built-in antenna used in a room distribution system product provided by an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of an optional built-in antenna used in a room distribution system product provided in an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of the structure of a built-in antenna used in a room distribution system product that can support dual-frequency communication provided by an embodiment of the present invention;

[0019] Figure 4 A schematic diagram of the structure of a built-in antenna used in a room distribution system product that can support triple-band communication provided by an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of the structure of a built-in antenna used in another indoor distributed system product provided by an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of the structure of another built-in antenna used in a room distribution system product that can support dual-frequency communication provided by an embodiment of the present invention;

[0022] Figure 7 A schematic structural diagram of another optional built-in antenna used in an indoor distributed system product supporting dual-frequency communication provided in an embodiment of the present invention.

[0023] Icon: 100-feeding line; 200-radiating surface connector; 300-radiating surface; 301-first radiating surface; 302-second radiating surface; 303-third radiating surface; 304-fourth radiating surface; 201-first conductor; 202-second conductor; 203-third conductor; 204-fourth conductor; 3011-first sub-radiating surface; 3012-second sub-radiating surface; 3013-third sub-radiating surface; 3021-fourth sub-radiating surface; 3022-fifth sub-radiating surface; 3023-sixth sub-radiating surface; 401-first ground feeder; 402-second ground feeder; 403-third ground feeder; 404-fourth ground feeder. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] In order to enhance the quality of indoor network coverage, indoor communication equipment has been developed. Antenna non-circularity is an important radiation parameter of the built-in antenna used in indoor distributed system products, which affects the signal receiving and transmitting performance of indoor communication equipment to a certain extent. Generally speaking, antenna non-circularity refers to its non-circularity in the horizontal plane, specifically half of the difference between the maximum gain and the minimum gain within the 360-degree range of the horizontal plane, that is, (G max -G min ) / 2, the gain here is also the synthesis of different polarization components.

[0028] Generally, the built-in antennas used in indoor distributed system products have very high requirements for non-circularity, and the built-in antennas used in indoor distributed system products in the prior art are difficult to meet the non-circularity index requirements. In view of this, an embodiment of the present invention provides a built-in antenna used in indoor distributed system products to alleviate the technical problems mentioned above.

[0029] Embodiment 1

[0030] Figure 1 A schematic diagram of the structure of a built-in antenna used in a room distribution system product provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the built-in antenna used in the indoor distributed system product includes: a feeder 100 and a radiator; the radiator includes: a radiating surface connector 200 and a plurality of radiating surfaces 300.

[0031] The radiation surface connector 200 is connected to at least two radiation surfaces, and the radiators are arranged in a uniformly distributed manner.

[0032] One end of the feed line 100 is connected to the radiation surface connector 200 , and the other end of the feed line 100 is connected to the radio frequency signal transceiver end of the printed circuit board.

[0033] Specifically, the radiation surface connector 200 is a component for connecting the radiation surfaces. In the embodiment of the present invention, the radiation surface connector 200 is connected to at least two radiation surfaces. Figure 1 The built-in antenna used in the indoor distributed system product shown is a radiator with only two radiating surfaces. Users can also add multiple radiating surfaces according to their needs, for example, 3 radiating surfaces, 4 radiating surfaces or more radiating surfaces are set. When the number of radiating surfaces increases, the corresponding radiator connectors will also change accordingly. The specific implementation method of setting multiple radiating surfaces 300 for the radiator will be specifically introduced below. The embodiment of the present invention does not specifically limit the number of radiating surfaces, but it is necessary to meet the requirement that the radiator composed of multiple radiating surfaces 300 and radiating surface connectors 200 has a uniform distribution characteristic, for example, the multiple radiating surfaces are arranged in an axially symmetrical structure or in a centrally symmetrical structure.

[0034] In the embodiment of the present invention, one end of the built-in antenna feeder 100 used in the indoor distributed system product needs to be connected to the radiation surface connector 200, and the other end is connected to the RF signal transceiver of the printed circuit board. The embodiment of the present invention does not impose specific restrictions on the width of the feeder 100, and the user needs to set it according to the actual situation.

[0035] Practice has proved that the built-in antenna used in indoor distributed system products composed of multiple radiation surfaces with uniform distribution characteristics can meet the antenna's horizontal plane non-roundness index after simple adjustment of relevant dimensions, thereby alleviating the technical problem that the horizontal plane non-roundness of the built-in antenna used in indoor distributed system products is difficult to meet in the existing technology.

[0036] The built-in antenna used in the distributed indoor system product provided in the embodiment of the present invention includes: a feeder 100 and a radiator; and the radiator includes: a radiating surface connector 200 and a plurality of radiating surfaces 300; the radiating surface connector 200 is connected to at least two radiating surfaces, and the radiator is arranged in a uniformly distributed manner; one end of the feeder 100 is connected to the radiating surface connector 200, and the other end is connected to the RF signal transceiver end of the printed circuit board. Practice has proved that the built-in antenna used in the distributed indoor system product with the above structural features can meet the antenna's non-circularity index in the horizontal plane by simply adjusting the relevant dimensions, which effectively alleviates the technical problem that the built-in antenna used in the distributed indoor system product in the prior art is difficult to meet the non-circularity index requirements.

[0037] The above briefly describes the structure of the built-in antenna used in the indoor distributed system product provided in the embodiment of the invention. The following specifically introduces some optional implementation methods of the built-in antenna used in the indoor distributed system product that meets the above conditions.

[0038] In an optional embodiment, when the radiator has only two radiating surfaces, Figure 1 The multiple radiation surfaces include: a first radiation surface 301 and a second radiation surface 302 . Optionally, the radiation surface connector 200 includes: a first conductor 201 , a second conductor 202 and a third conductor 203 .

[0039] The first end of the first conductor 201 is connected to the first radiation surface 301, and the second end of the first conductor 201 is connected to the first end of the second conductor 202; the first end of the third conductor 203 is connected to the second radiation surface 302, and the second end of the third conductor 203 is connected to the second end of the second conductor 202; the first conductor 201 and the third conductor 203 are far away from the printed circuit board relative to the second conductor 202.

[0040] Specifically, if the built-in antenna used in the indoor distributed system product is only provided with the feeder 100, then in the embodiment of the present invention, the radiating surface connector 200 is a bent structure, and its first conductor 201 is connected to the first radiating surface 301, the third conductor 203 is connected to the second radiating surface 302, and the two ends of the second conductor 202 are respectively connected to the first conductor 201 and the third conductor 203. It can be known from the connection method of the first conductor 201, the second conductor 202 and the third conductor 203 described above that Figure 1 The radiation surface connector 200 can increase the distance between the first radiation surface 301 and the second radiation surface 302 and the printed circuit board, thereby improving the performance of the built-in antenna used in the indoor distributed system product. In an optional embodiment, the first end of the first conductor 201 is connected to the edge of the first radiation surface 301, and correspondingly, the first end of the third conductor 203 is also connected to the edge of the second radiation surface 302, and the above connection method satisfies the uniform distribution characteristics of the radiator.

[0041] The embodiment of the present invention does not specifically limit the shape of the radiation surface. Optionally, if the radiation surface is rectangular, the middle of the first end of the first conductor 201 can be connected to the middle of any side of the first radiation surface 301 .

[0042] according to Figure 1It can be seen from the built-in antenna structure used in the provided distributed room system product that the built-in antenna used in the distributed room system product can only support single-band communication. The built-in antenna used in a single distributed room system product in the prior art only supports a single frequency band. If the communication device is required to meet the communication needs of multiple frequency bands, then multiple built-in antennas need to be set in the communication device to support multi-band communication. However, the setting of multiple antennas will inevitably increase the device space occupied by the antenna system. In this case, on the one hand, the device size of the communication device may increase. On the other hand, if the size of the communication device remains unchanged, it is equivalent to increasing the difficulty of designing the remaining internal components in disguise. In view of this, the embodiment of the present invention further improves the structure of the radiation surface so that a single antenna can support the needs of multi-band communication, thereby solving the technical problem that it is difficult to support multi-band communication under the premise of limited device space of the communication device.

[0043] In an optional embodiment, each radiating surface includes: at least one sub-radiating surface; the sub-radiating surfaces are connected in sequence on the same plane. From the above description, it can be seen that if the number of sub-radiating surfaces is 1, the built-in antenna used by the indoor distributed system product can only support single-frequency communication; if the number of sub-radiating surfaces is multiple, the built-in antenna used by the indoor distributed system product can support dual-frequency or even multi-frequency bands.

[0044] Optional, such as Figure 2 As shown, the first radiation surface 301 includes: a first sub-radiation surface 3011 , a second sub-radiation surface 3012 and a third sub-radiation surface 3013 ; the second radiation surface 302 includes: a fourth sub-radiation surface 3021 , a fifth sub-radiation surface 3022 and a sixth sub-radiation surface 3023 .

[0045] The first sub-radiating surface 3011, the second sub-radiating surface 3012 and the third sub-radiating surface 3013 are connected in sequence; the fourth sub-radiating surface 3021, the fifth sub-radiating surface 3022 and the sixth sub-radiating surface 3023 are connected in sequence; the first end of the first conductor 201 is connected to the first sub-radiating surface 3011, and the first end of the third conductor 203 is connected to the fourth sub-radiating surface 3021.

[0046] Figure 2 An optional implementation of multiple sub-radiating surfaces is shown. Figure 2In the embodiment, each radiation surface includes three sub-radiation surfaces. Under this structural design, the first end of the first conductor 201 is connected to the first sub-radiation surface 3011 in the first radiation surface 301, the first end of the third conductor 203 is connected to the fourth sub-radiation surface 3021 in the second radiation surface 302, the middle of the edge of the first sub-radiation surface 3011 away from the first conductor 201 is connected to one end of the second sub-radiation surface 3012, and the other end of the second sub-radiation surface 3012 is connected to the third sub-radiation surface 3013. The fourth sub-radiation surface 3021, the fifth sub-radiation surface 3022 and the sixth sub-radiation surface 3023 in the second radiation surface 302 are connected in accordance with the connection method of the sub-radiation surfaces in the first radiation surface 301. Figure 2 From the structure of the built-in antenna used in the indoor distributed system product shown, it can be seen that the antenna is capable of supporting dual-band communications.

[0047] The embodiment of the present invention does not limit the number of radiating surfaces in the radiator, and the user can set it according to actual needs; if the user needs a built-in antenna for a room-distributed system product that supports dual-frequency communication and requires three radiating surfaces, then refer to Figure 3 Structural design in Figure 3 Compared with the radiating surface connector in Figure 1 Two conductors are added to the radiating surface connector, and each radiating surface includes three sub-radiating surfaces.

[0048] If the user needs a built-in antenna for a room-distributed system product that supports tri-band communication and requires four radiating surfaces, then refer to Figure 4 Structural design in Figure 4 Compared with the radiating surface connector in Figure 1 Four conductors are added to the radiating surface connector, and each radiating surface includes five sub-radiating surfaces.

[0049] The above describes in detail various optional implementations of the built-in antenna used in the indoor distributed system product provided in the embodiment of the present invention. The following introduces another implementation of the built-in antenna used in the indoor distributed system product of the present invention.

[0050] When the multiple radiation surfaces include: a first radiation surface 301 and a second radiation surface 302, in an optional embodiment, refer to Figure 5 The built-in antenna used in the indoor distributed system product also includes: a first ground feed line 401 and a second ground feed line 402; the radiating surface connector 200 includes: a fourth conductor 204; the first radiating surface 301 and the second radiating surface 302 are respectively connected to the two ends of the fourth conductor 204; and the first radiating surface 301, the second radiating surface 302 and the fourth conductor 204 are on the same plane.

[0051] One end of the first ground feed line 401 is connected to the first radiation surface 301, and the other end of the first ground feed line 401 is connected to the ground surface of the printed circuit board; one end of the second ground feed line 402 is connected to the second radiation surface 302, and the other end of the second ground feed line 402 is connected to the ground surface of the printed circuit board.

[0052] Figure 5 Another implementation method of a built-in antenna used in a room-distributed system product is shown. According to the above description of the antenna structure, when the radiation surface connector 200 and the radiation surface are on the same plane, the built-in antenna body used in the room-distributed system product also needs to add a ground feed line below the first radiation surface 301 and the second radiation surface 302, respectively. Specifically, the first ground feed line 401 is arranged between the first radiation surface 301 and the ground surface of the printed circuit board, and the second ground feed line 402 is arranged between the second radiation surface 302 and the ground surface of the printed circuit board. Optionally, the first ground feed line 401 is connected to the edge of the first radiation surface 301. The embodiment of the present invention does not impose specific restrictions on the width of the ground feed line, and the user needs to set it according to actual conditions.

[0053] according to Figure 5 The built-in antenna structure used in the indoor distributed system product provided can only support single-band communication. In order to support dual-band communication, Figure 5 The antenna structure is improved. In an optional embodiment, as Figure 6 As shown, the built-in antenna used in the indoor distributed system product further includes: a third ground feeder 403 and a fourth ground feeder 404 ; the multiple radiation surfaces further include: a third radiation surface 303 and a fourth radiation surface 304 .

[0054] The third radiation surface 303 and the fourth radiation surface 304 are parasitic on both sides of the fourth conductor 204; one end of the third ground feed line 403 is connected to the third radiation surface 303, and the other end of the third ground feed line 403 is connected to the ground surface of the printed circuit board; one end of the fourth ground feed line 404 is connected to the fourth radiation surface 304, and the other end of the fourth ground feed line 404 is connected to the ground surface of the printed circuit board.

[0055] Figure 6Two pairs of evenly distributed radiation surfaces are used to realize dual-frequency communication. Specifically, a pair of parasitic radiation surfaces are added to the left and right of the feed line 100, that is, the third radiation surface 303 and the fourth radiation surface 304 mentioned above, and ground feed lines are respectively provided below the third radiation surface 303 and the fourth radiation surface 304, and the third ground feed line 403 and the fourth ground feed line 404 are required to be evenly distributed with the feed line 100 as the center, thereby ensuring the uniform distribution characteristics of the built-in antenna used in the indoor distributed system product. Optionally, the third ground feed line 403 is connected to the edge of the third radiation surface 303. In an optional embodiment, the area of ​​the third radiation surface 303 is smaller than the first radiation surface 301. Therefore, the first radiation surface 301 and the second radiation surface 302 are low-frequency radiation surfaces, and the third radiation surface 303 and the fourth radiation surface 304 are high-frequency radiation surfaces.

[0056] With the above Figures 1 to 4 Similarly, the embodiments of the present invention are not Figure 5 , Figure 6 The number of radiating surfaces of this type of antenna provided is limited, and users can set it according to actual needs; for example, to support single-band communication using 3, 4 or more radiating surfaces, Figure 7 A schematic diagram of the structure of another optional built-in antenna used in a room-distributed system product supporting dual-frequency communication provided by an embodiment of the present invention, Figure 7 In the figure, there are four radiating surfaces supporting high-frequency and low-frequency communications, and they are evenly distributed. It should be noted that the structural characteristics of each of the additional radiating surfaces are the same as those in the above text. Figure 5 and Figure 6 That is, each radiating surface is provided with a corresponding ground feed line connected to the ground plane of the printed circuit board.

[0057] In the embodiment of the present invention, the built-in antenna used in the indoor distributed system product is a uniformly distributed structure with multiple radiation surfaces. Therefore, only simple debugging is required to meet the antenna horizontal plane non-circularity index. For example, the port voltage standing wave ratio can be optimized by adjusting the height of the antenna, the radiation surface of the antenna, the distance between the ground feeder and the feeder line, etc. The specific debugging is consistent with that of a single PIFA antenna; the high-frequency performance is mainly improved by debugging the position and size of the parasitic.

[0058] To sum up, the built-in antenna used in the indoor distributed system product provided in the embodiment of the present invention has a radiator arranged in a uniformly distributed manner, and one end of the feed line 100 is connected to the radiating surface connector 200, and the other end is connected to the RF signal transceiver end of the printed circuit board. This optimized built-in antenna structure used in the indoor distributed system product can improve the horizontal plane non-roundness of the built-in antenna used in the indoor distributed system product, and can make the antenna have good non-roundness performance in multiple frequency bands, effectively alleviating the technical problem that the built-in antenna used in the indoor distributed system product in the prior art is difficult to meet the non-roundness index requirements.

[0059] Embodiment 2

[0060] An embodiment of the present invention further provides a communication device, which includes a built-in antenna used by any one of the indoor distributed system products in the first embodiment above.

[0061] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0062] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0063] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A built-in antenna for indoor distributed system products, characterized in that: include: Feeders and radiators; The radiator comprises: a radiating surface connector and a plurality of radiating surfaces; The radiation surface connector is connected to at least two of the radiation surfaces, and the radiators are arranged in a uniformly distributed manner; One end of the feeder line is connected to the radiation surface connector, and the other end of the feeder line is connected to the radio frequency signal transceiver end of the printed circuit board; Wherein, the multiple radiation surfaces include: a first radiation surface and a second radiation surface; each of the radiation surfaces includes: at least one sub-radiation surface; the sub-radiation surfaces are connected in sequence on the same plane; The radiating surface connector is a bent structure, and the radiating surface connector includes: a first conductor, a second conductor and a third conductor; or, the radiating surface connector includes: a fourth conductor, and the built-in antenna used in the indoor distributed system product also includes: a first ground feeder and a second ground feeder; The first end of the first conductor is connected to the first radiation surface, and the second end of the first conductor is connected to the first end of the second conductor; The first end of the third conductor is connected to the second radiation surface, and the second end of the third conductor is connected to the second end of the second conductor; The first conductor and the third conductor are away from the printed circuit board relative to the second conductor; The first radiation surface and the second radiation surface are respectively connected to two ends of the fourth conductor; and the first radiation surface, the second radiation surface and the fourth conductor are on the same plane; One end of the first ground feed line is connected to the first radiation surface, and the other end of the first ground feed line is connected to the ground surface of the printed circuit board; the first ground feed line is arranged between the first radiation surface and the ground surface of the printed circuit board; One end of the second ground feed line is connected to the second radiation surface, and the other end of the second ground feed line is connected to the ground surface of the printed circuit board; the second ground feed line is arranged between the second radiation surface and the ground surface of the printed circuit board.

2. The built-in antenna used in the indoor distributed system product according to claim 1, characterized in that: The first radiation surface includes: a first sub-radiation surface, a second sub-radiation surface and a third sub-radiation surface; the second radiation surface includes: a fourth sub-radiation surface, a fifth sub-radiation surface and a sixth sub-radiation surface; The first sub-radiating surface, the second sub-radiating surface and the third sub-radiating surface are connected in sequence; the fourth sub-radiating surface, the fifth sub-radiating surface and the sixth sub-radiating surface are connected in sequence; The first end of the first conductor is connected to the first sub-radiating surface, and the first end of the third conductor is connected to the fourth sub-radiating surface.

3. The built-in antenna used in the indoor distributed system product according to claim 1, characterized in that: The built-in antenna used in the indoor distributed system product further includes: a third ground feeder and a fourth ground feeder; the multiple radiation surfaces further include: a third radiation surface and a fourth radiation surface; The third radiation surface and the fourth radiation surface are parasitic on both sides of the fourth conductor; One end of the third ground feed line is connected to the third radiation surface, and the other end of the third ground feed line is connected to the ground surface of the printed circuit board; One end of the fourth ground feed line is connected to the fourth radiation surface, and the other end of the fourth ground feed line is connected to the ground surface of the printed circuit board.

4. The built-in antenna used in the indoor distributed system product according to claim 1, characterized in that: The first end of the first conductor is connected to the edge of the first radiation surface.

5. The built-in antenna used in the indoor distributed system product according to claim 3, characterized in that: The area of ​​the third radiation surface is smaller than that of the first radiation surface.

6. A communication device, characterized in that: The communication device includes a built-in antenna used in the indoor distributed system product described in any one of claims 1-5.

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