CN211295392U - Matching network of antenna, antenna structure and terminal - Google Patents
Matching network of antenna, antenna structure and terminal Download PDFInfo
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- CN211295392U CN211295392U CN201921959863.6U CN201921959863U CN211295392U CN 211295392 U CN211295392 U CN 211295392U CN 201921959863 U CN201921959863 U CN 201921959863U CN 211295392 U CN211295392 U CN 211295392U
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Abstract
The embodiment of the application discloses matching network, antenna structure and terminal of antenna, and the matching network includes: the antenna matching network comprises a first antenna matching network, a second antenna matching network and a third antenna matching network which are sequentially connected in series; a first radio frequency path and a second radio frequency path are arranged between the first end and the second end of the first antenna matching network, wherein the first radio frequency path comprises a first capacitor and a second capacitor which are sequentially connected in series, and the second radio frequency path comprises a first inductor; a radio frequency path between the first end and the second end of the second antenna matching network comprises a third capacitor and a fourth capacitor which are sequentially connected in series; the radio frequency path between the first and second ends of the third antenna matching network includes a second inductance. Therefore, the first antenna matching network, the second antenna matching network and the third antenna matching network are utilized to realize independent tuning of three different antenna frequency bands, and the tuning is flexible and high in tuning efficiency.
Description
Technical Field
The present application relates to communications technologies, and in particular, to a matching network for an antenna, an antenna structure, and a terminal.
Background
In order to meet the visual and tactile experience of people on the appearance of the mobile phone, each large mobile phone manufacturer has a unique appearance design scheme, such as the design of a bang screen, a water drop screen and a blind hole screen which are popular in the current market, and an ultra-high screen accounts for the ratio and is matched with a metal rear shell, so that better visual and tactile experience is achieved. However, when the appearance design is considered to meet the user requirements, new challenges are brought to the design of the antenna structure of the mobile phone, so that the area available for debugging the antenna becomes smaller, the clear space of the mobile phone antenna is greatly reduced, the bandwidth of the antenna becomes narrower and narrower, and the difficulty of antenna design is greatly increased.
The four-in-one Antenna designed by the sectional metal back shell mobile phone in the market at present mainly adopts the traditional Antenna forms of loop, Inverted-F Antenna (IFA)/monopole + parasitic, or micro-slit, etc. to realize the four-in-one Antenna.
The traditional four-in-one antenna has certain limitation on the position selection of a feed point, has certain requirements on the length of radiation metal, and simultaneously the width and the position of a gap influence the bandwidth and the efficiency of the four-in-one antenna, so that the position of the metal gap needs to be properly adjusted during debugging, and the gap breaking position meeting the performance requirement of the antenna sometimes conflicts with appearance design or structural design; meanwhile, in the debugging process, a proper feed point position is continuously sought, the feed point position meeting the antenna performance requirement is limited by the placement of the main board device, and the antenna tuning difficulty is high.
SUMMERY OF THE UTILITY MODEL
In order to solve the foregoing technical problem, embodiments of the present application are directed to providing a matching network of an antenna, an antenna structure, and a terminal.
The technical scheme of the application is realized as follows:
in a first aspect, a matching network for an antenna is provided, which includes: the antenna matching network comprises a first antenna matching network, a second antenna matching network and a third antenna matching network which are sequentially connected in series; wherein the content of the first and second substances,
a first end of the first antenna matching network is used as a feed point of the antenna and connected with the antenna, a second end of the first antenna matching network is connected with a first end of the second antenna matching network, a second end of the second antenna matching network is connected with a first end of the third antenna matching network, and a second end of the third antenna matching network is used as a radio frequency interface of the antenna;
a first radio frequency path and a second radio frequency path are arranged between the first end and the second end of the first antenna matching network, wherein the first radio frequency path comprises a first capacitor and a second capacitor which are sequentially connected in series, and the second radio frequency path comprises a first inductor;
a radio frequency path between the first end and the second end of the second antenna matching network comprises a third capacitor and a fourth capacitor which are sequentially connected in series;
a radio frequency path between the first and second ends of the third antenna matching network includes a second inductance.
In a second aspect, there is provided an antenna structure comprising the matching network of the first aspect.
In a third aspect, a terminal is provided, which includes the antenna structure of the second aspect.
By adopting the technical scheme, the first antenna matching network, the second antenna matching network and the third antenna matching network are utilized, so that the three different antenna frequency bands can be independently tuned, and the tuning is flexible and high in tuning efficiency.
Drawings
FIG. 1 is a schematic diagram of a first component structure of a matching network in an embodiment of the present application;
fig. 2 is a schematic diagram of a first component structure of a mobile terminal in an embodiment of the present application;
FIG. 3 is a schematic diagram of an antenna feed point position in an embodiment of the present application;
FIG. 4 is a diagram illustrating a first waveform of return loss of an antenna according to an embodiment of the present application;
FIG. 5 is a diagram illustrating a second waveform of return loss of the antenna according to an embodiment of the present invention;
FIG. 6 is a third waveform illustrating return loss of the antenna according to the embodiment of the present application;
FIG. 7 is a fourth waveform illustrating return loss of an antenna according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a second component structure of a matching network in an embodiment of the present application;
FIG. 9 is a schematic diagram of a second component structure of a mobile terminal according to an embodiment of the present application
Fig. 10 is a schematic structural diagram of an antenna structure according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a terminal in an embodiment of the present application.
Detailed Description
So that the manner in which the features and elements of the present embodiments can be understood in detail, a more particular description of the embodiments, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings.
An embodiment of the present application provides a matching network of an antenna, fig. 1 is a schematic diagram of a first component structure of the matching network in the embodiment of the present application, and as shown in fig. 1, the matching network includes: the antenna matching system comprises a first antenna matching network 11, a second antenna matching network 12 and a third antenna matching network 13 which are sequentially connected in series; wherein the content of the first and second substances,
a first end of the first antenna matching network 11 is connected to an antenna as a feeding point of the antenna, a second end of the first antenna matching network 11 is connected to a first end of the second antenna matching network 12, a second end of the second antenna matching network 12 is connected to a first end of the third antenna matching network 13, and a second end of the third antenna matching network 13 is used as a radio frequency interface of the antenna;
a first radio frequency path and a second radio frequency path are included between the first end and the second end of the first antenna matching network 11, wherein the first radio frequency path includes a first capacitor C1 and a second capacitor C2 which are sequentially connected in series, and the second radio frequency path includes a first inductor L1;
the radio frequency path between the first end and the second end of the second antenna matching network 12 comprises a third capacitor C3 and a fourth capacitor C4 which are sequentially connected in series;
the radio frequency path between the first and second terminals of the third antenna matching network 13 comprises a second inductance L2.
In practical applications, the first antenna matching network is used for tuning a first antenna frequency band, the second antenna matching network is used for tuning a second antenna frequency band, and the third antenna matching network is used for tuning a third antenna frequency band.
In some embodiments, the first antenna frequency band is a GPS frequency band, the second antenna frequency band is an WIFI2.4G frequency band, and the third antenna frequency band is a WIFI5G frequency band.
Specifically, the value range of the capacitance values of the first capacitor and the second capacitor in the first antenna matching network is greater than or equal to 0.3PF and less than or equal to 1.5 PF;
the value range of the inductance value of the first inductor is greater than or equal to 2NH and less than or equal to 6.8 NH.
The value ranges of the capacitance values of the third capacitor and the fourth capacitor in the second antenna matching network are greater than or equal to 0.3PF and less than or equal to 3 PF;
the value range of the inductance value of the second inductor is greater than or equal to 1NH and less than or equal to 10 NH.
The value range of the inductance value of the second inductor in the third antenna matching network is greater than or equal to 1NH and less than or equal to 10 NH.
In some embodiments, the matching network is disposed within a mobile terminal of a three-section all-metal back case or a three-section metal frame.
Fig. 2 is a schematic diagram of a first component structure of a mobile terminal in an embodiment of the present application, and as shown in fig. 2, the mobile terminal is a three-section type all-metal rear shell, and includes an upper metal shell 2, a metal rear shell 1, and a lower metal shell 5, where an upper broken seam 3 is included between the upper metal shell 2 and the metal rear shell 1, a lower broken seam 4 is included between the metal rear shell 1 and the lower metal shell 5, and a side broken seam (6, 7, 8, 9) of the metal shell is further included on a frame of the mobile terminal.
Fig. 3 is a schematic diagram of the position of the antenna feeding point in the embodiment of the present application, as shown in fig. 3, the antenna feeding point may be located at the upper end metal shell 2, the upper seam 3 further includes a connecting rib position, and since the requirement on the position of the side seam is flexible, the selection limit of the position of the feeding point is small.
The results of the tests of the above-described matching circuit are also given in fig. 4-7, with the frequency of the antenna on the abscissa and the return loss of the antenna on the ordinate. Fig. 4 is a schematic diagram of a first waveform of Return Loss of the antenna in the embodiment of the present application, and fig. 4 is a diagram of Return Loss (RL) obtained after the feeding point is accessed, and the only requirement for the selection of the feeding point is that a standing wave exists at the position of fig. 4(2.6-3G range).
In fig. 1, the first antenna matching network has a large influence on the GPS frequency band (i.e., the frequency band between point 1 and point 2), and has a very small influence on the WIFI2.4G frequency band and the WIFI5G frequency band, and the GPS can be tuned by adjusting (C1/C2/L1) in the first antenna matching network.
The second antenna matching network mainly tunes WIFI2.4G frequency band (i.e. the frequency band between point 4 and point 5), and has little influence on the GPS frequency band and the WIFI5G frequency band.
The third antenna matching network mainly tunes the WIFI5G frequency band (i.e., the frequency band between point 5 and point 6), and has very little influence on the GPS frequency band and the WIFI2.4G frequency band. Independent tuning of a frequency band can be achieved by adjusting different matching networks respectively.
Fig. 5 is a second waveform diagram of return loss of the antenna in the embodiment of the present application, and fig. 5 shows a waveform diagram of the RL after the first antenna matching network is added, where the return loss of the GPS frequency band meets the antenna performance requirement.
Fig. 6 is a third waveform schematic diagram of return loss of the antenna in the embodiment of the present application, fig. 6 shows a waveform schematic diagram of the RL after adding the second antenna matching network, and return loss of the WIFI2.4G frequency band meets the antenna performance requirement.
Fig. 7 is a fourth waveform schematic diagram of return loss of an antenna in the embodiment of the present application, and fig. 7 shows a waveform schematic diagram of an RL after a third antenna matching network is added, where the return loss of a WIFI5G frequency band meets the antenna performance requirement.
By adopting the technical scheme, the first antenna matching network, the second antenna matching network and the third antenna matching network are utilized, so that the three different antenna frequency bands can be independently tuned, and the tuning is flexible and high in tuning efficiency.
On the basis of the foregoing embodiments, an embodiment of the present application provides another antenna matching network, fig. 8 is a schematic diagram of a second component structure of the matching network in the embodiment of the present application, and as shown in fig. 8, the matching network includes: a first antenna matching network 81, a second antenna matching network 82 and a third antenna matching network 83 which are connected in series in sequence; wherein the content of the first and second substances,
a first end of the first antenna matching network 81 is connected to an antenna as a feeding point of the antenna, a second end of the first antenna matching network 81 is connected to a first end of the second antenna matching network 82, a second end of the second antenna matching network 82 is connected to a first end of the third antenna matching network 83, and a second end of the third antenna matching network 83 is used as a radio frequency interface of the antenna;
a first radio frequency path and a second radio frequency path are included between the first end and the second end of the first antenna matching network 81, wherein the first radio frequency path includes a first capacitor C1 and a second capacitor C2 which are sequentially connected in series, and the second radio frequency path includes a first inductor L1;
the radio frequency path between the first end and the second end of the second antenna matching network 82 comprises a third capacitor C3 and a fourth capacitor C4 which are sequentially connected in series; the second antenna matching network 82 further comprises a third inductance L3; the third inductor L3 is connected in parallel across the third capacitor C3.
The radio frequency path between the first and second terminals of the third antenna matching network 83 includes a second inductance L2.
In practical applications, the first antenna matching network is used for tuning a first antenna frequency band, the second antenna matching network is used for tuning a second antenna frequency band, and the third antenna matching network is used for tuning a third antenna frequency band.
In some embodiments, the first antenna frequency band is a GPS frequency band, the second antenna frequency band is an WIFI2.4G frequency band, and the third antenna frequency band is a WIFI5G frequency band.
Specifically, the value range of the capacitance values of the first capacitor and the second capacitor in the first antenna matching network is greater than or equal to 0.3PF and less than or equal to 1.5 PF;
the value range of the inductance value of the first inductor is greater than or equal to 2NH and less than or equal to 6.8 NH.
The value ranges of the capacitance values of the third capacitor and the fourth capacitor in the second antenna matching network are greater than or equal to 0.3PF and less than or equal to 3 PF;
the value range of the inductance values of the second inductor and the third inductor is greater than or equal to 1NH and less than or equal to 10 NH.
The value range of the inductance value of the second inductor in the third antenna matching network is greater than or equal to 1NH and less than or equal to 10 NH.
The matching network in the embodiment of the application is not only suitable for the mobile terminal with the three-section metal rear shell, but also suitable for the mobile terminal with the three-section metal frame. Fig. 9 is a schematic diagram of a second component structure of the mobile terminal in the embodiment of the present application, and as shown in fig. 9, the mobile terminal is a three-section metal frame, and includes an upper end metal frame 2, a terminal metal frame 1, and a lower end metal frame 3, where side seams (4, 5, 6, 7) are further included between the metal frames of the mobile terminal frame. The antenna feed point can be located at the upper end metal frame 2, and a connecting rib position is further included between the upper metal frame 2 and the mobile terminal main body. The requirement on the position of the side broken seam is flexible, so the selection limit of the position of the feed point is small.
By adopting the technical scheme, the independent tuning of the GPS/WIFI2.4G/WIFI5G can be realized by utilizing the first antenna matching network, the second antenna matching network and the third antenna matching network, the tuning is flexible, the antenna can be covered with full frequency to form a four-in-one antenna, and the cost of additionally adding FPC/PDS antenna wiring is not needed.
An embodiment of the present application further provides an antenna structure, as shown in fig. 10, where the antenna structure includes: an antenna 101 and a matching network 102, which is any one of the matching networks in the embodiments of the present application.
An embodiment of the present application further provides a terminal, and as shown in fig. 11, the terminal includes: an antenna structure 111 comprising an antenna and a matching network, the matching network being any one of the matching networks in the embodiments of the present application.
It should be noted that: "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
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 (7)
1. A matching network for an antenna, the matching network comprising: the antenna matching network comprises a first antenna matching network, a second antenna matching network and a third antenna matching network which are sequentially connected in series; wherein the content of the first and second substances,
a first end of the first antenna matching network is used as a feed point of the antenna and connected with the antenna, a second end of the first antenna matching network is connected with a first end of the second antenna matching network, a second end of the second antenna matching network is connected with a first end of the third antenna matching network, and a second end of the third antenna matching network is used as a radio frequency interface of the antenna;
a first radio frequency path and a second radio frequency path are arranged between the first end and the second end of the first antenna matching network, wherein the first radio frequency path comprises a first capacitor and a second capacitor which are sequentially connected in series, and the second radio frequency path comprises a first inductor;
a radio frequency path between the first end and the second end of the second antenna matching network comprises a third capacitor and a fourth capacitor which are sequentially connected in series;
a radio frequency path between the first and second ends of the third antenna matching network includes a second inductance.
2. The matching network of claim 1, wherein the first antenna matching network is configured to tune a first antenna frequency band, wherein the second antenna matching network is configured to tune a second antenna frequency band, and wherein the third antenna matching network is configured to tune a third antenna frequency band.
3. The matching network of claim 2, wherein the first antenna frequency band is a Global Positioning System (GPS) frequency band, the second antenna frequency band is an WIFI2.4G frequency band, and the third antenna frequency band is a WIFI5G frequency band.
4. The matching network of claim 1, wherein the matching network is disposed in a mobile terminal of a three-section all-metal back case or a three-section metal frame.
5. The matching network of any of claims 1-4, wherein the second antenna matching network further comprises a third inductance;
the third inductor is connected in parallel to two ends of the third capacitor.
6. An antenna structure, characterized in that it comprises an antenna and a matching network according to any of claims 1-5.
7. A terminal, characterized in that the terminal comprises an antenna arrangement according to claim 6.
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| CN201921959863.6U CN211295392U (en) | 2019-11-13 | 2019-11-13 | Matching network of antenna, antenna structure and terminal |
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| CN201921959863.6U CN211295392U (en) | 2019-11-13 | 2019-11-13 | Matching network of antenna, antenna structure and terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397902A (en) * | 2020-10-23 | 2021-02-23 | Oppo广东移动通信有限公司 | Antenna and impedance matching method and terminal thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112397902A (en) * | 2020-10-23 | 2021-02-23 | Oppo广东移动通信有限公司 | Antenna and impedance matching method and terminal thereof |
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