CN211238492U - Double-antenna system and electronic equipment - Google Patents
Double-antenna system and electronic equipment Download PDFInfo
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- CN211238492U CN211238492U CN202020219601.2U CN202020219601U CN211238492U CN 211238492 U CN211238492 U CN 211238492U CN 202020219601 U CN202020219601 U CN 202020219601U CN 211238492 U CN211238492 U CN 211238492U
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Abstract
The embodiment of the utility model provides a two antenna system and electronic equipment, two antenna system includes: the antenna comprises a metal middle frame, a main floor, a first antenna and a second antenna; the main floor is arranged on the inner side of the metal middle frame and is connected with the metal middle frame through a plurality of connecting pieces; the first antenna is arranged on the side edge of the metal middle frame and comprises a parasitic radiation arm and a feed point radiation arm, and the parasitic radiation arm and the feed point radiation arm are arranged in a coupling mode; the second antenna is arranged on the inner side of the metal middle frame and is coupled with the first antenna. The utility model discloses a two antenna systems have both guaranteed the original good performance of first antenna through multiplexing parasitic radiation arm, have improved the bandwidth and the radiation efficiency of second antenna again, keep apart also better, also can save space simultaneously.
Description
Technical Field
The embodiment of the utility model provides a relate to antenna technical field, especially relate to a two antenna system and electronic equipment.
Background
With the arrival of fifth-generation mobile communication, new frequency bands of FR1(450MHz-6000MHz) and FR2(24250MHz-52600MHz) are introduced into a mobile phone terminal, and due to the need of a Multiple-Input Multiple-Output (MIMO) antenna system in a mobile phone, the requirement of the number of antennas is greatly increased, and the space of the antenna layout and the design is basically unchanged compared with that of a fourth-generation mobile communication mobile phone terminal, which causes the reduction of the distance between antennas of the mobile phone, especially in the frequency band below 6GHz, and affects some antenna indexes such as isolation, radiation efficiency, and the like.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a two antenna system and electronic equipment for solve the antenna index of electronic equipment antenna system and receive the problem that influence, occupation space are big.
In order to solve the technical problem, the utility model discloses a realize like this:
in a first aspect, an embodiment of the present invention provides a dual antenna system, including:
the antenna comprises a metal middle frame, a main floor, a first antenna and a second antenna;
the main floor is arranged on the inner side of the metal middle frame and is connected with the metal middle frame through a plurality of connecting pieces;
the first antenna is arranged on the side edge of the metal middle frame and comprises a parasitic radiation arm and a feed point radiation arm, and the parasitic radiation arm and the feed point radiation arm are arranged in a coupling mode;
the second antenna is arranged on the inner side of the metal middle frame and is coupled with the first antenna.
In a second aspect, an embodiment of the present invention provides an electronic device, including: a dual antenna system as claimed in any one of the preceding claims.
The embodiment of the utility model provides an in, through multiplexing parasitic radiation arm, both guaranteed the original good performance of first antenna, improved the bandwidth and the radiation efficiency of second antenna again, keep apart also better, two antenna system can be done very little simultaneously, save the space that occupies.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the alternative embodiments. The drawings are only for purposes of illustrating alternative embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a dual-antenna system according to an embodiment of the present invention;
FIG. 2 is a simplified schematic diagram of the dual antenna system of FIG. 1;
fig. 3 is a schematic diagram of an S-parameter curve when only the first antenna is provided in the embodiment of the present invention;
fig. 4 is a schematic diagram of an efficiency curve of the embodiment of the present invention when only the first antenna is provided;
fig. 5 is a schematic diagram of current distribution with an operating frequency of 3.4GHz only for the first antenna in the embodiment of the present invention;
fig. 6 is a schematic diagram of current distribution with an operating frequency of 3.6GHz only when the first antenna is provided in the embodiment of the present invention;
fig. 7 is a schematic diagram of an S-parameter curve of a dual-antenna system according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an efficiency curve of a dual-antenna system according to an embodiment of the present invention;
fig. 9 is a graph illustrating radiation efficiency curves of a dual antenna system and only a first antenna according to an embodiment of the present invention;
fig. 10 is a schematic diagram of the current distribution of the dual-antenna system according to the embodiment of the present invention, in which the operating frequency of the first antenna is 3.6 GHz.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," in an embodiment of the present invention should not be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
Referring to fig. 1-2, fig. 1 is a schematic structural diagram of a dual-antenna system according to an embodiment of the present invention, and fig. 2 is a simplified structural diagram of the dual-antenna system in fig. 1. As shown in fig. 1-2, the dual antenna system in the embodiment of the present invention includes: the antenna comprises a metal middle frame 11, a main floor, a first antenna 14 and a second antenna 16, wherein the metal middle frame 11 can be a rectangular frame, the main floor is arranged in the metal middle frame 11 and is fixedly connected with the metal middle frame 11 through a plurality of connecting pieces, and the main floor is used for grounding of all components; the first antenna 14 is arranged at the side of the metal middle frame 11, and the second antenna is arranged at the inner side of the metal middle frame 11.
In the embodiment of the present invention, the first antenna 14 includes a feed point radiation arm 141 and a parasitic radiation arm 142, the feed point radiation arm 141 and the parasitic radiation arm 142 are arranged in a same straight line, and a break 17 is arranged between the feed point radiation arm 141 and the parasitic radiation arm 142 to realize a partition; preferably, the width of the broken seam 17 can be 1mm-2 mm; further, the feed point radiating arm 141 and the parasitic radiating arm 142 are coupled, that is, when the feed point radiating arm 141 operates, a part of a signal emitted by the feed point radiating arm 141 is coupled to the parasitic radiating arm 142, and the feed point radiating arm 141 and the parasitic radiating arm 142 operate cooperatively. In some embodiments, the feed radiating arm 141 is connected to the main ground plane in the metal middle frame 11 through a first connector 143 to achieve grounding, and the parasitic radiating arm 142 is connected to the main ground plane in the metal middle frame 11 through a second connector 144 to achieve grounding.
In some embodiments of the present invention, the first antenna 14 may be formed by a metal frame, that is, the side of the metal frame may be divided into two sections by forming a slit 17 on one side of the metal frame, one of the two sections is used as the feed point radiation arm 141, and the other section is used as the parasitic radiation arm 142, in which case, the first antenna 14 may also be referred to as a frame antenna. By using the metal frame as a partial structure of the antenna, the occupied space of the antenna can be reduced, and meanwhile, the performance of the antenna is enhanced by using the metal frame.
In fig. 1, the viewing angle is from the back of the electronic device to the electronic device, the display 18 of the electronic device is opposite to the back of the electronic device, the display 18 is located on the front of the metal middle frame 11, a Printed circuit board 12 (PCB) is further disposed on the main floor inside the metal middle frame 11, the PCB 12 is located on the back of the metal middle frame 11, and the second antenna 16 is disposed on the PCB 12 and located inside the metal middle frame 11, i.e. in the enclosed area of the metal middle frame 11; because the first antenna 14 uses the metal frame as a partial structure of the antenna, and the metal frame is located at the side of the metal middle frame 11, the first antenna 14 is also located at the side of the metal middle frame 11; further, the second antenna 16 is disposed in coupling with the first antenna 14, specifically, the second antenna 16 is disposed inside the parasitic radiation arm 142 of the first antenna 14, and the parasitic radiation arm 142 is disposed in spaced coupling with the trace of the second antenna 16, when the second antenna 16 operates, a part of the signal emitted by the second antenna is coupled to the parasitic radiation arm 142, and the two implement cooperative operation. That is to say, the parasitic radiation arm 142 is coupled to the feed point radiation arm 141 and is also coupled to the second antenna 16, so that the first antenna 14 and the second antenna 16 can multiplex the parasitic radiation arm 142, which not only ensures the original good performance of the first antenna 14, but also improves the bandwidth and radiation efficiency of the second antenna 16, and has good isolation, and meanwhile, the dual-antenna system can be small, and the occupied space is saved.
In some embodiments of the present invention, the routing of the second antenna 16 may be adjusted, for example, by adjusting the position of the plane or the vertical plane through the bracket, so as to control the distance between the parasitic radiation arm 142 of the first antenna 14 and the second antenna 16, thereby controlling the coupling degree therebetween; preferably, the distance between the parasitic radiating arm 142 and the trace of the second antenna 16 is not more than 2mm, so as to improve the performance of the dual-antenna system.
In the embodiment of the present invention, the feed point radiation arm 141 is provided with a first feed point 145, and the first feed point 145 is connected to the feed source on the printed circuit board 12 to transmit the feed source signal to the feed point radiation arm 141; a second feed point 161 is arranged on the second antenna 16, and the second feed point 161 is connected with a feed source on the printed circuit board 12 so as to transmit a feed source signal to the second antenna 16; preferably, the distance between the first feed point 145 and the second feed point 161 is less than 10% of the wavelength in free space corresponding to the lowest operating frequency of the dual-antenna system, so as to ensure that the first antenna 14 and the second antenna 16 have better isolation in operation, and preferably, in some implementations, the distance between the first feed point 145 and the second feed point 161 may be 7mm, and satisfy the condition of less than 10% corresponding to 0.056 wavelength in free space of 2.4GHz, which is the lowest operating frequency of the dual-antenna system; further, the second antenna 16 further includes a grounding point 162, and the grounding point 162 is connected to the main floor to realize grounding.
In some embodiments of the present invention, the first antenna 14 may be an inverted F antenna, i.e., an IFA antenna, and forms a dual-frequency or multi-frequency resonant antenna by using the form of the IFA antenna plus parasitic coupling (i.e., the feed point radiation arm 141 and the parasitic radiation arm 142 are coupled); the second antenna 16 may be a planar inverted F antenna, i.e. a PIFA antenna, or may be a loop antenna, and when the second antenna 16 is a planar inverted F antenna, the grounding point 162 is disposed between the first feed point 145 and the second feed point 161 to improve the performance of the second antenna 16.
In other embodiments of the present invention, at least one of the first antenna 14 and the second antenna 16 has an overlapped frequency or a frequency interval smaller than 100MHz, and specifically, the first antenna 14 can operate in N41+ N78 frequency band, where the N41 frequency band is 2496MHz to 2690MHz, and the N78 frequency band is 3300MHz to 3800 MHz; and the second antenna 16 operates in the wifi2.4g +5G band. Wherein, there is the overlapping part in the N41 frequency channel of first antenna 14 and the WiFi2.4G frequency channel of second antenna, has the potential poor condition of isolation, consequently, in the utility model discloses in, can set up the length of feed point radiation arm 141 to 8mm ~ 12mm, and the length of spurious radiation arm 142 sets up to 5.7mm ~ 9.7mm, and the interval that makes second antenna 16's line and spurious radiation arm 142 sets up to being less than 2mm, and second antenna 16's line is located one side of broken joint 17 basically for the isolation of the working band between first antenna 14 and the second antenna 16 is greater than 10dB, thereby improves the working property of two antenna systems.
Referring to fig. 3, fig. 3 is a schematic diagram of an S-parameter curve when only the first antenna is provided in the embodiment of the present invention. As can be seen from fig. 3, when there is only the first antenna 14, the S11 (i.e., the return loss characteristic) of the first antenna 14 in the N41+ N78 frequency band is less than-5 dB, and the loss is large.
Referring to fig. 4, fig. 4 is a schematic diagram of an efficiency curve of the embodiment of the present invention with only the first antenna. In fig. 4, the solid line is the radiation efficiency curve of the first antenna 14, and the dashed line is the total efficiency curve of the first antenna 14, and it can be seen from fig. 4 that the radiation efficiency of the N41 band is relatively flat when only the first antenna 14 is used, and the radiation efficiency of the N78 band is greatly reduced when the radiation efficiency is 3.6GHz, because the energy of the first antenna 14 at about 3.6GHz is absorbed and lost due to the existence of the whole resonant structure when only the first antenna 14 is used.
Referring to fig. 5 and fig. 6, fig. 5 is a schematic diagram of current distribution with an operating frequency of 3.4GHz when only the first antenna is provided in the embodiment of the present invention, and fig. 6 is a schematic diagram of current distribution with an operating frequency of 3.6GHz when only the first antenna is provided in the embodiment of the present invention. As can be seen from a comparison between fig. 5 and fig. 6, the current of the first antenna 14 is mainly distributed in the left structure at 3.4GHz, and when the operating frequency is 3.6GHz, the energy of the first antenna 14 is pulled by the structure shown in the dashed line box in fig. 6, and absorption loss is caused, which is also the reason that the efficiency of the first antenna 14 is greatly reduced at around 3.6 GHz.
Referring to fig. 7, fig. 7 is a schematic diagram of an S-parameter curve of a dual-antenna system according to an embodiment of the present invention. Where the curve S11 represents the S11 (input reflection coefficient) parameter curve for the first antenna 14, the curve S22 represents the S22 (output reflection coefficient) parameter curve for the second antenna 16, and the curve S12 is the S12 (isolation) or S21 (gain) parameter curve between the two antennas. As can be seen from fig. 7, after adding the second antenna 16, both antennas have better impedance bandwidth and isolation is above 10dB in the full frequency band.
Referring to fig. 8, fig. 8 is a schematic diagram of an efficiency curve of a dual-antenna system according to an embodiment of the present invention. The thin solid line is a radiation efficiency curve of the first antenna 14, the thick solid line is a radiation efficiency curve of the second antenna 14, the thin dotted line is a total efficiency curve of the first antenna 14, and the thick dotted line is a total efficiency curve of the second antenna 16. As can be seen from fig. 8, the average total efficiency of the first antenna 14 in the N41 frequency band is about-4.3 dB, the average total efficiency in the N78 frequency band is about-4.2 dB, the average total efficiency of the second antenna 16 in the WiFi2.4G frequency band is about-7 dB, the average total efficiency in the WiFi 5G frequency band is about-3.4 dB, and both the two antennas have higher total efficiency.
Referring to fig. 9, fig. 9 is a schematic diagram of a radiation efficiency curve of a dual-antenna system and only a first antenna according to an embodiment of the present invention. Wherein the solid line is a radiation efficiency curve of the first antenna 14 in the dual antenna system, and the dotted line is a radiation efficiency curve of only the first antenna 14. It can be seen that in the case of the dual-antenna system, that is, in the presence of the second antenna 16, only a small influence is exerted on the N41 frequency band of the first antenna 14, so that the radiation efficiency of the first antenna 14 in the N41 frequency band is reduced by about 0.5dB, which is caused by the fact that the second antenna 16 occupies a part of the headroom and height space of the first antenna 14, and the Q value of the first antenna 14 is increased, and the radiation efficiency is reduced. However, further, in a dual-antenna system, that is, in the presence of the second antenna 16, the radiation efficiency of the first antenna 14 in the N78 frequency band is improved, because the second antenna 16 is coupled with the parasitic radiation arm 142 of the first antenna, the energy in the N78 frequency band of the first antenna 14 is pulled, so that the proportion of the energy originally flowing to the absorption loss region of the first antenna 14 is greatly reduced, and meanwhile, because the interval between the second antenna 16 and the first antenna 14 is reasonably set, the volume of the antenna in the N78 frequency band of the first antenna 14 is increased, and the radiation performance is improved.
Referring to fig. 10, fig. 10 is a schematic diagram of current distribution of a dual-antenna system according to an embodiment of the present invention, in which the operating frequency of a first antenna is 3.6 GHz. Comparing fig. 10 with fig. 6, it can be seen that in the dual-antenna system, that is, in the presence of the second antenna 16, the energy of the N78 frequency band of the first antenna 14 is drawn onto the trace of the second antenna 16 (the solid-line frame in fig. 10), and the current drawn by the whole resonant structure (the dashed-line frame in fig. 10) is weakened, so that the loss is reduced, which is also the reason why the radiation performance of the first antenna 14 is improved in the presence of the second antenna 16.
According to the embodiment of the utility model provides a two antenna system through multiplexing parasitic radiation arm, has both guaranteed the original good performance of first antenna, has improved the bandwidth and the radiant efficiency of second antenna again, keeps apart also betterly, and two antenna system can be done very little simultaneously, saves the space that occupies.
The utility model discloses another aspect embodiment still provides an electronic equipment, electronic equipment includes as above arbitrary embodiment the two antenna system, because the two antenna system of aforementioned embodiment has above-mentioned beneficial effect, the utility model discloses electronic equipment in the embodiment also possesses corresponding beneficial effect, no longer gives unnecessary details here.
Further, in some embodiments of the present invention, the electronic device further includes a printed circuit board, the printed circuit board is disposed inside the metal middle frame of the dual-antenna system, and the first feed point of the first antenna and the second feed point of the second antenna in the dual-antenna system are respectively connected to the printed circuit board to implement signal transmission and reception.
It should be noted that, in this document, 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 phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.
Claims (10)
1. A dual antenna system, comprising:
the antenna comprises a metal middle frame, a main floor, a first antenna and a second antenna;
the main floor is arranged on the inner side of the metal middle frame and is connected with the metal middle frame through a plurality of connecting pieces;
the first antenna is arranged on the side edge of the metal middle frame and comprises a parasitic radiation arm and a feed point radiation arm, and the parasitic radiation arm and the feed point radiation arm are arranged in a coupling mode;
the second antenna is arranged on the inner side of the metal middle frame and is coupled with the first antenna.
2. The dual antenna system of claim 1, wherein the parasitic radiating arm and the feed radiating arm are connected to the main floor by the connector.
3. The dual antenna system of claim 2, wherein the parasitic radiating arm and the feed radiating arm are collinear, and wherein a break is formed between the parasitic radiating arm and the feed radiating arm.
4. The dual-antenna system of claim 1, wherein the parasitic radiating arm is spaced apart from the second antenna, and a distance between the parasitic radiating arm and a trace of the second antenna is not more than 2 mm.
5. The dual-antenna system according to claim 1, wherein a first feed point is disposed on the feed point radiating arm, a second feed point is disposed on the second antenna, and a distance between the first feed point and the second feed point is less than 10% of a wavelength in free space corresponding to a lowest operating frequency of the dual-antenna system.
6. The dual antenna system of claim 5, wherein the first antenna is an inverted-F antenna and the second antenna is a planar inverted-F antenna.
7. The dual antenna system of claim 6, wherein a ground point is further disposed on the second antenna, the ground point being located between the first feed point and the second feed point.
8. The dual antenna system of claim 1, wherein the feed radiating arm has a length of 8mm to 12mm, and the parasitic radiating arm has a length of 5.7mm to 9.7 mm.
9. An electronic device, comprising: the dual antenna system of any one of claims 1-8.
10. The electronic device of claim 9, wherein the dual antenna system comprises a metal bezel, a first antenna, and a second antenna, the electronic device further comprising:
the printed circuit board is arranged on the inner side of the metal middle frame, and a first feed point of the first antenna and a second feed point of the second antenna are respectively connected with the printed circuit board.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020219601.2U CN211238492U (en) | 2020-02-27 | 2020-02-27 | Double-antenna system and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020219601.2U CN211238492U (en) | 2020-02-27 | 2020-02-27 | Double-antenna system and electronic equipment |
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| CN211238492U true CN211238492U (en) | 2020-08-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929475A (en) * | 2021-02-04 | 2021-06-08 | 维沃移动通信有限公司 | Electronic device |
| WO2022213698A1 (en) * | 2021-04-07 | 2022-10-13 | 荣耀终端有限公司 | Electronic device |
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2020
- 2020-02-27 CN CN202020219601.2U patent/CN211238492U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112929475A (en) * | 2021-02-04 | 2021-06-08 | 维沃移动通信有限公司 | Electronic device |
| CN112929475B (en) * | 2021-02-04 | 2023-12-08 | 维沃移动通信有限公司 | Electronic equipment |
| WO2022213698A1 (en) * | 2021-04-07 | 2022-10-13 | 荣耀终端有限公司 | Electronic device |
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