CN112909544B - Electronic equipment and multi-antenna system thereof - Google Patents
Electronic equipment and multi-antenna system thereof Download PDFInfo
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- CN112909544B CN112909544B CN202110182376.9A CN202110182376A CN112909544B CN 112909544 B CN112909544 B CN 112909544B CN 202110182376 A CN202110182376 A CN 202110182376A CN 112909544 B CN112909544 B CN 112909544B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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Abstract
The application discloses electronic equipment and multi-antenna system thereof, the system comprises at least two single antennas, and each single antenna comprises a reference ground, a radiator, a feed conductor and a grounding conductor. The first end of the feed conductor is electrically connected with the feed source, the second end of the feed conductor is electrically connected with the radiator, the first end of the grounding conductor is electrically connected with the radiator, the second end of the grounding conductor is electrically connected with the reference ground, and the reference grounds of the single antennas are conducted. In the technical scheme, the reference grounds of the single antennas are conducted, so that a low potential area is formed near the grounding conductor connected with the reference grounds, the interference of space coupling in an antenna system is counteracted, the transmission of radiation energy among the single antennas is restrained, and the aim of strong anti-interference capability is fulfilled. In addition, the anti-interference capability is achieved by conducting through the reference ground, and the cost of the long distance between the single antennas is not needed, so that the overall size of the antenna is reduced to a certain extent.
Description
Technical Field
The present application relates to the field of radio frequency technologies, and in particular, to an electronic device and a multi-antenna system thereof.
Background
An antenna is one of important devices in electronic equipment, and is used to convert a guided wave propagating on a transmission line into an electromagnetic wave propagating through an unbounded medium (usually, free space) or vice versa. In some cases, the electronic device needs two antennas to operate in the same frequency band, so two antennas (or more than two antennas, which are called multi-antenna systems) need to be installed in the electronic device.
In order to meet the requirement of isolation and reduce the interference rejection of the two antennas, the distance between the two antennas is usually increased. Obviously, this approach does not meet the current trend of miniaturization of electronic devices.
Therefore, the problem of how to take into account miniaturization and interference resistance is the primary solution.
Disclosure of Invention
The application aims to provide an electronic device and a multi-antenna system thereof, and the electronic device has the characteristics of small size and strong anti-interference capability.
In order to solve the above technical problem, the present application provides a multi-antenna system, which includes at least two single antennas, each single antenna includes a reference ground, a radiator, a feed conductor, and a ground conductor, the reference ground with the radiator is located on a different plane, a first end of the feed conductor is electrically connected with a feed source, a second end of the feed conductor is electrically connected with the radiator, a first end of the ground conductor is electrically connected with the radiator, a second end of the ground conductor is electrically connected with the ground reference, and a plurality of the single antennas are electrically connected with the reference.
Preferably, the number of the single antennas is 2.
Preferably, the radiator of each single antenna is provided with a notch.
Preferably, the number of the notches is multiple, and the notches are rectangular gaps to form a grid shape.
Preferably, 2 of the single antennas are perpendicular to each other, and the ground conductors of the 2 single antennas are all close to the connection of the reference grounds of the 2 single antennas.
Preferably, the radiator and the reference ground in the single antenna are square and parallel to each other.
Preferably, the radiator is located directly above the reference ground, and an area of the radiator is smaller than an area of the reference ground.
Preferably, a microstrip circuit is disposed on the back of the printed circuit board where the reference location is located, and the printed circuit board is provided with a feed through hole for electrically connecting the feed conductor with the microstrip circuit through the feed through hole.
Preferably, the substrate of the printed circuit board is FR-4.
In order to solve the above technical problem, the present application provides an electronic device including the multi-antenna system.
The multi-antenna system provided by the application comprises at least two single antennas, wherein each single antenna comprises a reference ground, a radiator, a feed conductor and a grounding conductor. The reference ground and the radiator are located on different planes, the first end of the feed conductor is electrically connected with the feed source, the second end of the feed conductor is electrically connected with the radiator, the first end of the ground conductor is electrically connected with the radiator, the second end of the ground conductor is electrically connected with the reference ground, and the reference grounds of the single antennas are conducted. In the technical scheme, the reference grounds of the single antennas are conducted, so that a low-potential area is formed near the grounding conductor connected with the reference grounds, the interference of space coupling in an antenna system is counteracted, the transmission of radiation energy among the single antennas is restrained, and the aim of strong anti-interference capability is fulfilled. In addition, the anti-interference capability is achieved by conducting through the reference ground, and the cost of the long distance between the single antennas is not needed, so that the overall size of the antenna is reduced to a certain extent.
In addition, the electronic equipment provided by the application comprises the multi-antenna system, and the effect is the same as that of the multi-antenna system.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings required for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained by those skilled in the art without inventive effort.
Fig. 1 is a structural diagram of a multi-antenna system according to an embodiment of the present disclosure;
FIG. 2 provides a front view of FIG. 1 for an embodiment of the present application;
FIG. 3 provides a top view of FIG. 1 for an embodiment of the present application;
FIG. 4 provides a left side view of FIG. 1 for an embodiment of the present application;
fig. 5 is a structural diagram of a first single antenna provided in the present application;
FIG. 6 is a front view of FIG. 5 as provided in the practice of the present application;
FIG. 7 is a top view of FIG. 5 in accordance with an embodiment of the present disclosure;
FIG. 8 is a left side view of FIG. 5 according to an embodiment of the present application;
fig. 9 is a simulation diagram of a correspondence relationship between a frequency and a working efficiency according to an embodiment of the present application;
fig. 10 is a simulation diagram of S parameters provided by an antenna according to an embodiment of the present application;
the reference numbers are as follows:
the antenna comprises a first single antenna 1, a second single antenna 2, a printed circuit board 3, a radiator 11, a feed conductor 12, a ground conductor 13, a nonmetallic substrate 14, a front metal layer 15, a back metal layer 16, a conductive through hole 17, a feed through hole 18 and a notch 19.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the present application.
The core of the application is to provide an electronic device and a multi-antenna system thereof.
In order that those skilled in the art will better understand the disclosure, the following detailed description is given with reference to the accompanying drawings.
In real life, with the development of information technology and the advancement of technology, electronic devices are more and more entering into our lives, and wireless devices in the electronic devices also put higher demands on antenna design, and how to reduce the size of the antenna and achieve good isolation performance is one of the most concerned problems in the industry.
To solve the above problems, the present embodiment provides a multi-antenna system. The system comprises at least two single antennas, and the reference grounds of the single antennas are conducted. On the premise of meeting the performance requirements, the smaller the number of the single antennas is, the better the antenna is, and the smaller the overall size of the antenna can be ensured. As a preferred embodiment, the number of the single antennas is 2, and 2 single antennas will be described as an example hereinafter.
Fig. 1 is a structural diagram of a multiple antenna system according to an embodiment of the present application. Fig. 2 provides a front view of fig. 1 for an embodiment of the present application. Fig. 3 provides a top view of fig. 1 for an embodiment of the present application. Fig. 4 provides a left side view of fig. 1 for an embodiment of the present application. As shown in fig. 1 to 4, the multi-antenna system includes two single antennas, i.e., a first single antenna 1 and a second single antenna 2. The first single antenna 1 and the second single antenna 2 are both arranged on the same printed circuit board 3, and the printed circuit board 3 is used as a reference ground, and the reference ground of the first single antenna and the second single antenna is necessarily conducted due to the fact that the first single antenna and the second single antenna are the common reference ground. It will be appreciated that in an implementation, the two may not share a printed circuit board, as long as the reference ground conduction of the two is ensured.
In specific implementation, the first single antenna 1 and the second single antenna 2 operate in the same frequency band and operate independently of each other. Fig. 5 is a structural diagram of a first single antenna according to an embodiment of the present disclosure. Fig. 6 is a front view of fig. 5 in accordance with an implementation of the present application. Fig. 7 is a top view of fig. 5 in accordance with an implementation of the present application. Fig. 8 is a left side view of fig. 5 according to an embodiment of the present application. It should be noted that the first single antenna 1 and the second single antenna 2 have the same structure, so the structure of the second single antenna 2 can refer to fig. 5 to 8, and the details are not repeated in this application. As shown in fig. 5 to 8, the first unitary antenna 1 includes a reference ground, a radiator 11, a feed conductor 12, and a ground conductor 13, where the reference ground and the radiator 11 are located on different planes, a first end of the feed conductor 12 is electrically connected to a feed source, a second end of the feed conductor 12 is electrically connected to the radiator 11, a first end of the ground conductor 13 is electrically connected to the radiator 11, and a second end of the ground conductor 13 is electrically connected to a reference ground 10.
In practice, printed circuit boards are typically metal clad on both sides of a non-metallic substrate, such as copper clad on both sides, which may be an FR-4 board. As shown in the figure, the two sides of the non-metallic substrate 14 are a front metal layer 15 and a back metal layer 16, respectively, and the front metal layer 15 and the back metal layer 16 are conductive copper-clad regions of the printed circuit board and are communicated with each other through a plurality of conductive through holes 17 to form a whole. A feed through hole 18 is provided in the printed circuit board for connecting the feed conductor 12 to a feed source through, and as a preferred embodiment, a microstrip circuit is provided on the back side of the printed circuit board and electrically connected to the feed conductor 12 for transmitting the rf signal to the radiator 11, and the feed conductor 12 may be a cylindrical copper rod.
The structure forms a reference ground of the first single antenna, the radiator 11 is arranged above the reference ground, a gap is formed between the reference ground and the radiator 11, the reference ground and the radiator 11 are not in contact, the reference ground and the radiator are electrically connected through the grounding conductor 13, the grounding conductor 13 is used for conducting the radiator 11 and the reference ground, the impedance characteristic of the antenna is adjusted through the position change of the grounding point, and the radiation performance of the antenna is optimized. The ground point shown in the figure is only one specific implementation and does not represent that the ground point is only this way. The radiator 11 is typically a metal sheet, for example a copper sheet, and the radiator 11 and the feed and ground conductors may be soldered. After the feed power supplies feed signal energy to the radiator 11 through the feed conductor, the capacitor structure formed between the radiator 11 and the reference ground stores energy and radiates the signal energy to a free space at the edge of the radiator 11.
The multi-antenna system provided by this embodiment includes at least two single antennas, where each single antenna includes a reference ground, a radiator, a feed conductor, and a ground conductor. The reference ground and the radiating body are located on different planes, the first end of the feed conductor is electrically connected with the feed source, the second end of the feed conductor is electrically connected with the radiating body, the first end of the grounding conductor is electrically connected with the radiating body, the second end of the grounding conductor is electrically connected with the reference ground, and the reference grounds of the single antennas are conducted. In the technical scheme, the reference grounds of the single antennas are conducted, so that a low-potential area is formed near the grounding conductor connected with the reference grounds, the interference of space coupling in an antenna system is counteracted, the transmission of radiation energy among the single antennas is restrained, and the aim of strong anti-interference capability is fulfilled. In addition, the anti-interference capability is realized by reference ground conduction, and the cost of long distance between single antennas is not needed, so that the overall size of the antenna is reduced to a certain extent.
In addition to the above embodiments, in order to increase the electrical length, increase the current flowing path, and improve the radiation intensity of the antenna, the radiator 11 is provided with a notch 19. It will be appreciated that the provision of the gap 19 increases the electrical length of the radiator, which increases the path of the current flowing therethrough, relative to increasing the area of the radiator, which further reduces the size of the antenna system. It will be understood that the positions and the number of the notches 19 are determined according to practical situations. In one embodiment, the number of the notches 19 is plural, and the notches 19 are rectangular slits to form a grid type, as shown in fig. 5 and 7.
Further, the radiator 11 and the reference ground in the single antenna are square and parallel to each other. Thereby can be with electromagnetic energy restraint inside the antenna through upper and lower parallel structure and reduced the restriction of antenna to service environment, improved the interference killing feature. The radiator 11 is located right above the reference ground, and the area of the radiator 11 is smaller than that of the reference ground.
In order to make the technical solutions provided in the present application more clear to those skilled in the art, in a specific embodiment, the total height of the single antenna is 5mm, and the projection plane is a square shape of 15mm × 15mm. Radiator 11 is 12mm's square, and the breach is arranged at radiator 11 both sides, is 6 breach structures, and the size is 0.5mm wide 7.5mm long, and adjacent interval is 1mm between breach 19, can adjust the current distribution and the mode of resonating of antenna through adjusting the size of breach 19 and interval between.
In the above, the structure of the single antenna is described in detail, and besides the structure of the single antenna itself affects the anti-interference capability and the volume of the antenna system, the position relationship between the single antennas is also important for the miniaturization of the antenna system. As a preferred embodiment, the 2 single antennas are perpendicular to each other, and the ground conductors 13 of the 2 single antennas are all close to the connection point of the reference ground of the 2 single antennas. It can be understood that the single antennas in this embodiment are located in the same horizontal plane, and the two antennas are vertically placed, and the connection point of the ground conductor close to the reference ground can further reduce the distance between the two antennas, so as to cancel the interference of spatial coupling in the dual-antenna system, and implement the dual-antenna operation at a compact distance.
In order to make the technical solution provided by the present application more clear to those skilled in the art, in a specific embodiment, the printed circuit board is a 25mm × 100mm rectangle, the medium is FR-4, and two sides are coated with copper. Two monomer antennas distribute in printed circuit board's one corner, have realized monomer antenna 15 × 5mm space under the 2.4GHz frequency channel working property. Under 2 × 15 × 5mm space, two antenna centre spacings are about 21mm, and compared with the quarter-wavelength centre spacing requirement of the traditional multi-antenna system, the distance between two single antennas is greatly shortened by the design scheme, so that the combination mode can adapt to miniaturized electronic equipment.
The structure of the single antenna and the combination mode of the single antenna are explained in detail above, and a simulation experiment is performed to verify the technical scheme provided by the present application. Fig. 9 is a simulation diagram of a correspondence relationship between a frequency and a working efficiency according to an embodiment of the present application. As shown in fig. 9, the horizontal axis represents frequency, the solid line represents the operating efficiency of the first individual antenna, and the dotted line represents the operating efficiency of the second individual antenna. Fig. 10 is a simulation diagram of S-parameters provided by an antenna according to an embodiment of the present application. As shown in fig. 10, the dashed line with the downward opening represents the isolation between the first single antenna and the second single antenna, and the isolation is less than-10 dB in the 2.4Hz frequency band. The dotted line that the opening is upwards is the return loss of first monomer antenna, and the solid line is the return loss of second monomer antenna, and the two is in 2.4Hz frequency channel, all satisfy the requirement.
Finally, an embodiment of the present application further provides an electronic device, which includes the multi-antenna system described in the above embodiment in addition to the device body. Since the multi-antenna system is described in detail above, this embodiment is not described in detail.
The electronic device provided by the embodiment includes a multi-antenna system, where the system includes at least two single antennas, and each single antenna includes a reference ground, a radiator, a feed conductor, and a ground conductor. The reference ground and the radiator are located on different planes, the first end of the feed conductor is electrically connected with the feed source, the second end of the feed conductor is electrically connected with the radiator, the first end of the ground conductor is electrically connected with the radiator, the second end of the ground conductor is electrically connected with the reference ground, and the reference grounds of the single antennas are conducted. In the technical scheme, the reference grounds of the single antennas are conducted, so that a low potential area is formed near the grounding conductor connected with the reference grounds, the interference of space coupling in an antenna system is counteracted, the transmission of radiation energy among the single antennas is restrained, and the aim of strong anti-interference capability is fulfilled. In addition, the anti-interference capability is realized by reference ground conduction, and the cost of long distance between single antennas is not needed, so that the overall size of the antenna is reduced to a certain extent. The antenna system is small in size, so that miniaturization development of electronic equipment is facilitated.
The electronic device and the multi-antenna system thereof provided by the present application are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
Claims (8)
1. A multi-antenna system is characterized in that the system comprises at least two single antennas, each single antenna comprises a reference ground, a radiator, a feed conductor and a ground conductor, the reference ground and the radiator are positioned on different planes, a first end of the feed conductor is electrically connected with a feed source, a second end of the feed conductor is electrically connected with the radiator, a first end of the ground conductor is electrically connected with the radiator, a second end of the ground conductor is electrically connected with the reference ground, and the reference grounds of the multiple single antennas are conducted so as to form a low-potential area around the ground conductor connected with the reference ground;
the unit antenna is 2, 2 unit antenna mutually perpendicular, and 2 unit antenna's the ground conductor all is close to 2 the junction of unit antenna the reference ground.
2. The multiple-antenna system according to claim 1, wherein the radiator of each individual antenna is notched.
3. The multiple antenna system according to claim 2, wherein the number of the notches is plural, and the notches are rectangular slots to form a grid pattern.
4. The multiple antenna system according to claim 1, wherein the radiator and the reference ground in the single antenna are square and parallel to each other.
5. The multi-antenna system according to claim 4, wherein the radiator is located directly above the reference ground, and an area of the radiator is smaller than an area of the reference ground.
6. The multiple antenna system according to claim 1, wherein a microstrip circuit is disposed on a back surface of the printed circuit board where the reference ground is located, and the printed circuit board is formed with a feed through hole for electrically connecting the feed conductor to the microstrip circuit through the feed through hole.
7. The multiple antenna system of claim 6, wherein the substrate of the printed circuit board is FR-4.
8. An electronic device, characterized in that it comprises a multi-antenna system according to any one of claims 1 to 7.
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| CN202110182376.9A CN112909544B (en) | 2021-02-08 | 2021-02-08 | Electronic equipment and multi-antenna system thereof |
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| CN202110182376.9A CN112909544B (en) | 2021-02-08 | 2021-02-08 | Electronic equipment and multi-antenna system thereof |
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| CN112909544A CN112909544A (en) | 2021-06-04 |
| CN112909544B true CN112909544B (en) | 2023-03-28 |
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