CN211655068U - Antenna structure and electronic equipment - Google Patents
Antenna structure and electronic equipment Download PDFInfo
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- CN211655068U CN211655068U CN202020740914.2U CN202020740914U CN211655068U CN 211655068 U CN211655068 U CN 211655068U CN 202020740914 U CN202020740914 U CN 202020740914U CN 211655068 U CN211655068 U CN 211655068U
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Abstract
An embodiment of the utility model provides an antenna structure and electronic equipment, antenna structure, including first antenna and second antenna, be provided with antenna tuning module on the first antenna, antenna tuning module is used for reducing the antenna efficiency of first antenna at first frequency channel, wherein, first frequency channel does the working frequency channel of second antenna. The embodiment of the utility model provides a can improve the isolation of first antenna and second antenna, effectively reduce the interference of first antenna to the second antenna, promote antenna structure's working property.
Description
Technical Field
The utility model relates to the field of communication technology, especially, relate to an antenna structure and electronic equipment.
Background
With the development of communication technology, antennas of electronic devices often need to support communication requirements of different frequency bands, and in practical applications, when antennas of different operating frequency bands operate simultaneously, interference may exist between the antennas, resulting in poor operating performance of the antennas.
For example, for an electronic device adopting a Non-StandAlone architecture (NSA), a mechanism of dual connection between Long Term Evolution (LTE) and a fifth generation mobile communication technology (hereinafter referred to as 5G) is adopted, and two antennas, namely a fourth generation mobile communication antenna (hereinafter referred to as a 4G antenna) and a fifth generation mobile communication antenna (hereinafter referred to as a 5G antenna), are provided. If the working frequency band of the 4G antenna includes a B3 frequency band (generally 1710-1785 MHz corresponding to an uplink transmission frequency band), and the working frequency band of the 5G antenna includes an n77 frequency band (generally 3300-4200 MHz corresponding to a downlink reception frequency band), when the 4G antenna and the 5G antenna simultaneously work, a second harmonic (corresponding to 3420-3570 MHz frequencies) of a transmission signal of the 4G antenna just falls within the working frequency band of the 5G antenna, which causes interference to the working frequency band of the 5G antenna, thereby causing poor working performance of the 5G antenna.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an antenna structure and electronic equipment to the antenna of solving different work frequency channels is at the simultaneous working, probably has the interference each other, leads to the relatively poor problem of working property of antenna.
In a first aspect, an embodiment of the present invention provides an antenna structure, including first antenna and second antenna, be provided with antenna tuning module on the first antenna, antenna tuning module is used for reducing the antenna efficiency of first antenna at first frequency channel, wherein, first frequency channel does the working frequency channel of second antenna.
In a second aspect, the embodiment of the present invention further provides an electronic device, including the above antenna structure.
The embodiment of the utility model provides an antenna structure through set up antenna tuning module on first antenna, changes the working frequency channel of first antenna for first antenna reduces at the antenna efficiency of first frequency channel, has restrained the radiation efficiency of first antenna at first frequency channel scope promptly, can improve the isolation of first antenna and second antenna, effectively reduces the interference of first antenna to the second antenna, promotes antenna structure's working property.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a second harmonic interference n77 antenna of a B3 antenna;
fig. 2 is a schematic structural diagram of a first antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first antenna connected to an antenna tuning module according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the antenna return loss of the first antenna of FIG. 2;
FIG. 5 is a graph comparing the return loss of the antenna for the first antenna shown in FIGS. 2 and 3;
fig. 6 is a schematic diagram of a standing wave superposition of another first antenna according to an embodiment of the present invention;
fig. 7 is a schematic diagram of the return loss of the antenna in an operation mode of another first antenna according to the embodiment of the present invention;
fig. 8 is a schematic diagram of the return loss of the antenna in another operation mode of another first antenna according to the embodiment of the present invention;
fig. 9 is a schematic structural diagram of another first antenna according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of another embodiment of the present invention, in which the first antenna is connected to the antenna tuning module.
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.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description herein do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
The embodiment of the utility model provides an antenna structure, including first antenna 100 and second antenna, be provided with antenna tuning module 200 on the first antenna 100, antenna tuning module 200 is used for reducing the antenna efficiency of first antenna 100 at first frequency channel, wherein, first frequency channel does the working frequency channel of second antenna.
In this embodiment, the first antenna 100 and the second antenna may be two types of antennas with different operating frequency bands.
For example, the first antenna 100 may be a 4G antenna, the second antenna may be a 5G antenna, and when the operating frequency band of the first antenna 100 is smaller than the operating frequency band of the second antenna, and the first antenna 100 and the second antenna operate simultaneously, the frequency of N-th harmonic (N is an integer greater than 1, in practical applications, the N-th harmonic is mainly a second harmonic, a third harmonic, and the like) generated in the first antenna 100 may fall into the operating frequency band of the second antenna, thereby generating interference on the second antenna.
Under the working mode of double connection (E-UTRA NR dual connectivity with MCG using E-UTRA and SCG using NR, EN-DC) with an evolved unified terrestrial radio access network as a main node and a new antenna as an auxiliary node, the 4G antenna and the 5G antenna work simultaneously. Referring to fig. 1, for an antenna with an operating frequency band of B3 in a 4G antenna (hereinafter referred to as a B3 antenna), the conventional operating frequency band is: uplink transmission (UL) frequency range 1710-1785 MHz, and downlink reception (DL) frequency range 1805-1880 MHz. For an antenna with an operating band of n77 (corresponding to NR in the figure, hereinafter referred to as n77 antenna) in a 5G antenna, the conventional operating band (including UL band and DL band) is 3300-4200 MHz. When the B3 antenna is used for transmitting signals, the frequency band (3420-3570 MHz) of the generated second harmonic completely falls into the working frequency band of the n77 antenna, and then interference is generated on the operation of the n77 antenna.
For another example, the overlapping portion of the first antenna 100 and the second antenna in the operating frequency band may also cause interference between the two antennas.
Through setting up the antenna tuning module, can change the working frequency channel of first antenna, for example the working frequency channel of first antenna takes place the translation, perhaps dwindles the working frequency channel of first antenna for the antenna efficiency of first antenna at first frequency channel reduces, has restrained the radiation efficiency of first antenna at first frequency channel scope promptly, has improved the isolation of first antenna and second antenna, effectively reduces the interference of first antenna to the second antenna, promotes antenna structure's working property.
Optionally, the first antenna 100 includes a first antenna trace 111 and an antenna feed point 130, a first end of the first antenna trace 111 is connected to the antenna feed point 130, a second end of the first antenna trace 111 is grounded, and the antenna tuning module 200 is connected to a first position of the first antenna trace 111;
wherein the first position is located between the first end and the second end of the first antenna trace 111.
Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of the first antenna 100, and fig. 3 is a schematic structural diagram of the first antenna 100 and the antenna tuning module 200 after being connected. The first antenna trace 111 is located at the right side of the antenna feed point 130, the point a corresponds to the first end of the first antenna trace 111, the grounded end at the rightmost side corresponds to the second end of the first antenna trace 111, and the point B in fig. 3 corresponds to the first position, which is located between the point a and the grounded end at the rightmost side.
Since the length of the antenna is generally in inverse proportion to the working frequency band thereof, the antenna tuning module 200 is disposed at the first position, so that the equivalent length of the first antenna 100 can be increased, the whole standing wave of the first antenna 100 shifts to the low frequency direction, the radiation gain of the N-th harmonic generated in the first antenna 100 in the first frequency band becomes poor, and the effect of suppressing the harmonic interference can be achieved.
In some possible embodiments, the specific location of the first location on the first antenna trace 111 can be determined by trial and error or simulation. For example, for the trial and error method, a grounding operation may be performed at different positions of the first antenna trace 111 to determine the position of the secondary multiple frequency point (i.e., the resonance point) of the B3 antenna, and the position is taken as the first position; for simulation, the first location may be determined by a simulation tool.
In one example, the antenna tuning module 200 includes at least one of a tuning switch, a tuning capacitance, and a ground switch. It is understood that the tuning capacitor may be an integrated structure, or may be a separate tunable capacitor, which can be used to adjust the equivalent length of the first antenna 100; the grounding switch can be a single switch, one end of the switch is connected with the first position, and the other end of the switch is directly grounded.
In one example, the antenna tuning module 200 includes a first switch and a third antenna; one end of the first switch is connected with the first position, and the other end of the first switch is connected with the third antenna. The third antenna may be understood as an antenna separately provided and used for adjusting the equivalent length of the first antenna 100, and the connection or disconnection of the first antenna trace 111 and the third antenna is realized by the closing or opening of the first switch. For example, when the first switch is closed, the first antenna 100 is connected to the third antenna, the equivalent length of the first antenna 100 is increased, and the operating frequency band of the first antenna 100 is correspondingly decreased.
Optionally, as shown in fig. 2 and fig. 3, the first antenna 100 further includes a second antenna trace 112; the first end of the first antenna trace 111 is connected to the third end of the second antenna trace 112, and the fourth end of the second antenna trace 112 is grounded.
Referring to fig. 2 and fig. 3, in the present embodiment, the first end of the first antenna trace 111 is connected to the third end of the second antenna trace 112 and is connected to the antenna feed point 130; the second end of the first antenna trace 111 and the fourth end of the second antenna trace 112 are grounded.
For the first antenna 100 shown in fig. 2, the antenna return loss is approximately as shown in fig. 4, where S11 represents the antenna return loss in decibels (dB) and F represents frequency in MHz. As shown in FIG. 4, the low-frequency radiation range of the first antenna 100 is mainly in the frequency band range of 824-960 MHz, and the medium-frequency radiation range is mainly in the frequency band range of 1710-2690 MHz. Generally, due to parasitic effects of antennas, for example, in electronic devices of mobile terminals, the antenna efficiency of a harmonic frequency band of an intermediate frequency (generally, a frequency band of 1000 to 2000MHz) is high, so that it may be considered to reduce the antenna efficiency of a frequency band corresponding to second-order frequency multiplication of an associated antenna (for example, a B3 antenna).
For the structure in which the first antenna 100 is connected to the antenna tuning module 200 as shown in fig. 3, the antenna return loss is substantially as shown by the broken line in fig. 5 (the solid line in fig. 5 coincides with the solid line in fig. 4). As can be seen from fig. 5, when the antenna tuning module 200 is added, the equivalent length of the first antenna 100 becomes longer, and the antenna standing wave as a whole is shifted in the low frequency direction. For example, since the low frequency band of the first antenna 100 is generally wide, the radiation gain of the B3 antenna becomes better when the whole antenna standing wave is shifted in the low frequency direction, but the radiation gain of the frequency point corresponding to the second-order frequency multiplication becomes worse, thereby achieving the effect of suppressing the frequency multiplication interference.
In one example, the length of the first antenna trace 111 is greater than the length of the second antenna trace 112. For example, the first antenna trace 111 is a middle-low frequency trace and has a length of about a quarter wavelength of a certain frequency in the corresponding frequency band, and the second antenna trace 112 is a high frequency trace and has a length of about a quarter wavelength of a certain frequency in the corresponding frequency band. In connection with a practical embodiment, when the first antenna 100 includes a B3 antenna, the second harmonic thereof will interfere with the second antenna having a New antenna (NR), so that the isolation between the B3 antenna and the New antenna is mainly considered. Since the position of the second frequency doubling point corresponding to the B3 antenna is usually located on the middle and low frequency trace, the first position for connecting the antenna tuning module 200 can be determined to be on the middle and low frequency trace (i.e., on the first antenna trace 111).
Optionally, the first antenna 100 includes at least two antenna elements, and the antenna tuning module 200 includes a second switch 201; at least one of the at least two antenna units is provided with the second switch 201.
Referring to fig. 6 and 7, in practical applications, for some antenna structures, the intermediate frequency part and/or the high frequency part in the corresponding operating frequency band are superimposed by a plurality of standing waves, that is, the first antenna 100 may include at least two antenna units, and a second switch 201 is disposed on at least one of the antenna units; referring to fig. 8, by turning off the second switch 201, the antenna efficiency of the first antenna 100 in a specific frequency band (corresponding to the increase of the return loss of the antenna) can be suppressed, so as to achieve the effect of improving the isolation between the first antenna 100 and the second antenna.
Optionally, the at least two antenna units include a first antenna unit 121 and a second antenna unit 122, the second switch 201 is disposed on the first antenna unit 121, and an operating frequency band of the first antenna unit 121 is higher than an operating frequency band of the second antenna unit 122.
Referring to fig. 9, in an example, the first antenna 100 includes a first antenna element 121 and a second antenna element 122, where the first antenna element 121 is located on the left side of the drawing and is a high-frequency antenna (the operating frequency band may be greater than 2000 MHz); the second antenna unit 122 is located at the right side of the figure and is an intermediate frequency antenna (the working frequency band may be between 1000-2000 MHz). In this embodiment, as shown in fig. 10, a second switch 201 is disposed on the first antenna unit 121 with a higher operating frequency band, and when the first antenna 100 and the second antenna work together, the first antenna unit 121 is turned off, so that the efficiency of the high frequency part is reduced, thereby increasing the isolation between the first antenna 100 and the second antenna.
For example, when the first antenna 100 is a 4G antenna and the second antenna is a 5G antenna, since the operating frequency band of the 5G antenna is greater than that of the 4G antenna, by disconnecting the first antenna unit 121, the antenna efficiency of the 4G antenna in the higher frequency band of the operating frequency band can be suppressed, so as to increase the isolation between the 4G antenna and the 5G antenna.
It can be understood that the first antenna 100 may further include more than three antenna units, the first antenna unit 121 may be the antenna unit with the highest or higher operating frequency band among the more than three antenna units, and when the second switch 201 on the first antenna unit 121 is turned off, the isolation between the first antenna 100 and the second antenna may be improved.
In one example, the first antenna element 121 includes a parasitic antenna element. In other words, the high frequency part of the operating band of the first antenna 100 may be generated by parasitics.
The embodiment of the utility model provides an electronic equipment is still provided, including foretell antenna structure.
It should be noted that, the implementation manner of the antenna structure is also applicable to the embodiment of the electronic device, and can achieve the same technical effect, and details are not described herein again.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An antenna structure is characterized by comprising a first antenna (100) and a second antenna, wherein an antenna tuning module (200) is arranged on the first antenna (100), and the antenna tuning module (200) is used for reducing the antenna efficiency of the first antenna (100) in a first frequency band, wherein the first frequency band is the working frequency band of the second antenna.
2. The antenna structure according to claim 1, wherein the first antenna (100) comprises a first antenna trace (111) and an antenna feed point (130), a first end of the first antenna trace (111) is connected to the antenna feed point (130), a second end of the first antenna trace (111) is grounded, and the antenna tuning module (200) is connected to a first position of the first antenna trace (111);
wherein the first position is located between a first end and a second end of the first antenna trace (111).
3. The antenna structure according to claim 2, characterized in that the antenna tuning module (200) comprises at least one of a tuning switch, a tuning capacitance and a grounding switch.
4. The antenna structure according to claim 2, characterized in that the antenna tuning module (200) comprises a first switch and a third antenna;
one end of the first switch is connected with the first position, and the other end of the first switch is connected with the third antenna.
5. The antenna structure according to claim 2, characterized in that the first antenna (100) further comprises a second antenna trace (112);
the first end of the first antenna wire (111) is connected with the third end of the second antenna wire (112), and the fourth end of the second antenna wire (112) is grounded.
6. The antenna structure according to claim 5, characterized in that the length of the first antenna trace (111) is larger than the length of the second antenna trace (112).
7. The antenna arrangement according to claim 1, characterized in that the first antenna (100) comprises at least two antenna elements, the antenna tuning module (200) comprising a second switch (201);
at least one of the at least two antenna units is provided with the second switch (201).
8. The antenna structure according to claim 7, characterized in that said at least two antenna elements comprise a first antenna element (121) and a second antenna element (122), said second switch (201) being arranged on said first antenna element (121), wherein the operating frequency band of said first antenna element (121) is higher than the operating frequency band of said second antenna element (122).
9. The antenna structure according to claim 8, characterized in that the first antenna element (121) comprises a parasitic antenna element.
10. An electronic device, characterized in that it comprises an antenna structure according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020740914.2U CN211655068U (en) | 2020-05-08 | 2020-05-08 | Antenna structure and electronic equipment |
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| CN202020740914.2U CN211655068U (en) | 2020-05-08 | 2020-05-08 | Antenna structure and electronic equipment |
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| CN211655068U true CN211655068U (en) | 2020-10-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067156A (en) * | 2021-02-24 | 2021-07-02 | 深圳市锐尔觅移动通信有限公司 | Multi-band antenna, design method of multi-band antenna and electronic equipment |
| CN113690619A (en) * | 2021-09-15 | 2021-11-23 | 宇龙计算机通信科技(深圳)有限公司 | Antenna and terminal |
-
2020
- 2020-05-08 CN CN202020740914.2U patent/CN211655068U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113067156A (en) * | 2021-02-24 | 2021-07-02 | 深圳市锐尔觅移动通信有限公司 | Multi-band antenna, design method of multi-band antenna and electronic equipment |
| CN113067156B (en) * | 2021-02-24 | 2024-06-11 | 深圳市锐尔觅移动通信有限公司 | Multi-band antenna, design method of multi-band antenna and electronic equipment |
| CN113690619A (en) * | 2021-09-15 | 2021-11-23 | 宇龙计算机通信科技(深圳)有限公司 | Antenna and terminal |
| CN113690619B (en) * | 2021-09-15 | 2024-01-05 | 宇龙计算机通信科技(深圳)有限公司 | Antenna and terminal |
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