CN210576465U

CN210576465U - Electronic equipment

Info

Publication number: CN210576465U
Application number: CN201922102939.XU
Authority: CN
Inventors: 付堉皓; 梁宇文; 付新建
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-05-19
Anticipated expiration: 2029-11-29

Abstract

The utility model provides an electronic device, which comprises a first antenna arm, a feed source, a first capacitor and a first resonant circuit; the first antenna arm comprises a first end and a second end which are oppositely arranged, and a feeding point which is positioned between the first end and the second end, wherein the first end is an open end, and the second end is grounded; the feed source is electrically connected with the feed point through the first capacitor; one end of the first resonant circuit is electrically connected with the feed point through the first capacitor, and the other end of the first resonant circuit is grounded; the first resonant circuit is used for antenna impedance tuning in a first frequency band range, and antenna impedance tuning is not performed in a second frequency band range, and the maximum value of the first frequency band range is smaller than the minimum value of the second frequency band range. The utility model discloses need not to increase the quantity of antenna quantity and feed point, reduced the design degree of difficulty of antenna.

Description

Electronic equipment

Technical Field

The utility model relates to a communication equipment technical field especially relates to an electronic equipment.

Background

It is known in the prior art that in the existing electronic device (e.g. a mobile phone), only a small range of frequency bands (e.g. two frequency bands of N41(2500MHz-2690MHz) and/or N78(3300MHz-3800 MHz)) is supported at a single feeding point of an antenna, and for the N79(4800MHz-5000MHz) frequency band, an additional feeding point is usually required. This will increase the number of antennas and feed points of the electronic device, thereby introducing a problem of coupling between antennas, resulting in a difficult design of the antennas.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an electronic equipment to solve through increasing antenna quantity and feed point and realize increasing the great problem of the design degree of difficulty that the frequency channel bandwidth leads to the antenna.

In a first aspect, an embodiment of the present invention provides an electronic device, including a first antenna arm, a feed source, a first capacitor, and a first resonant circuit;

the first antenna arm comprises a first end and a second end which are oppositely arranged, and a feeding point which is positioned between the first end and the second end, wherein the first end is an open end, and the second end is grounded;

the feed source is electrically connected with the feed point through the first capacitor;

one end of the first resonant circuit is electrically connected with the feed point through the first capacitor, and the other end of the first resonant circuit is grounded;

the first resonant circuit is used for antenna impedance tuning in a first frequency band range, and antenna impedance tuning is not performed in a second frequency band range, and the maximum value of the first frequency band range is smaller than the minimum value of the second frequency band range.

The embodiment of the utility model provides a carry out antenna impedance tuning to first frequency channel scope through increasing first resonant circuit to the frequency channel bandwidth design demand of first frequency channel scope and second frequency channel scope has been realized. Because be in the embodiment of the utility model provides an in, need not to increase the quantity of antenna quantity and feed point, consequently reduced the design degree of difficulty of antenna.

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 structural diagram of an electronic device according to an embodiment of the present invention;

fig. 2 is a block diagram of an electronic device according to another embodiment of the present invention;

fig. 3 is a schematic diagram illustrating initial S11 parameters during unmatched tuning in an electronic device according to an embodiment of the present invention;

fig. 4 is a schematic diagram of initial impedance distribution when unmatched tuning is performed in the electronic device according to an embodiment of the present invention;

fig. 5 is a schematic diagram of parameters S11 in the case that the electronic device provided by the present invention is not provided with the second antenna arm;

fig. 6 is a schematic diagram of impedance distribution when the second antenna arm is not provided in the electronic device according to the present invention;

fig. 7 is a schematic view of antenna efficiency when the second antenna arm is not provided in the electronic device according to the present invention;

fig. 8 is a schematic diagram of S11 parameters when the electronic device provided by the present invention is provided with a second antenna arm;

fig. 9 is a schematic diagram of impedance distribution when the electronic device provided by the present invention is provided with the second antenna arm;

fig. 10 is a schematic view of antenna efficiency when the electronic device provided by the present invention is provided with the second antenna arm.

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.

Referring to fig. 1, an embodiment of the present invention provides an electronic device, which includes a first antenna arm 10, a feed 11, a first capacitor C1, and a first resonant circuit 12;

the first antenna arm 10 includes a first end and a second end which are oppositely arranged, and a feeding point located between the first end and the second end, the first end is an open end, and the second end is grounded;

the feed source 11 is electrically connected with the feeding point through the first capacitor C1;

one end of the first resonant circuit 12 is electrically connected to the feeding point through the first capacitor C1, and the other end is grounded;

the first resonant circuit 12 is configured to perform antenna impedance tuning for a first frequency range, and not perform antenna impedance tuning for a second frequency range, where a maximum value of the first frequency range is smaller than a minimum value of the second frequency range.

In an embodiment of the present invention, the specific ranges of the first frequency range and the second frequency range may be set according to actual requirements, for example, in an optional embodiment, the first frequency range may include at least one of N41, N77(3.3GHz-4.2GHz), and N78; the second frequency band range may include N79.

Specifically, in the embodiment of the present invention, the value of the first capacitor C1 can be set according to actual requirements, and the first capacitor C1 is used to reduce the inductive reactance of the antenna input impedance, so that the antenna impedance is close to 50 Ω. The first resonant circuit 12 is used for antenna impedance tuning of the wireless signals of N41, N77 and N78, and the first resonant circuit 12 is equivalent to inductance for the wireless signals of N41, N77 and N78 and is equivalent to extremely small capacitance for the wireless signals of N79, so that the antenna impedance for N79 is kept basically unchanged.

The embodiment of the utility model provides a carry out antenna impedance tuning to first frequency channel scope through increasing first resonant circuit 12 to the frequency channel bandwidth design demand of first frequency channel scope and second frequency channel scope has been realized. Because be in the embodiment of the utility model provides an in, need not to increase the quantity of antenna quantity and feed point, consequently reduced the design degree of difficulty of antenna.

The specific structure of the first resonant circuit 12 may be set according to actual needs, for example, in the embodiment of the present invention, the first resonant circuit 12 includes a first inductor L1 and a second capacitor C2; one end of the first inductor L1 is electrically connected with the feeding point through the first capacitor C1, and the other end is grounded; the second capacitor C2 is connected in parallel with the first inductor L1.

The specific values of the first inductor L1 and the second capacitor C2 may be set according to actual needs, for example, in an optional embodiment, the value range of the first inductor L1 may be 1.5nH to 2.0nH, and the value range of the second capacitor C2 may be 0.5pF to 1.1 pF. Because the embodiment of the utility model provides an adopt first inductance L1 and second electric capacity C2 to connect in parallel and form first resonant circuit 12, its simple structure is convenient for realize.

Further, based on the above-mentioned embodiment, in the embodiment of the present invention, this electronic device further includes a second resonant circuit 13, the second resonant circuit 13 is connected in series to the first capacitor C1 and between the feed sources 11, for fine adjustment of the antenna impedance.

In the embodiment of the utility model provides an in, above-mentioned second resonant circuit 13 is equivalent to the electric capacity effect to the radio signal of N41, N77 and N78, is equivalent to the inductance effect to the radio signal of N79, can carry out fine adjustment to antenna impedance to improve the efficiency of antenna. In other words, the second resonant circuit 13 is connected in series between the first capacitor C1 and the feed 11, so that the frequency band bandwidth of the antenna can be improved.

Optionally, the structure of the second resonant circuit 13 may be set according to actual needs, for example, in an optional embodiment, the second resonant circuit 13 includes a second inductor L2 and a third capacitor C3, one end of the second inductor L2 is electrically connected to the feeding point through the first capacitor C1, and the other end is electrically connected to the feed 11 through the third capacitor C3.

The specific values of the second inductor L2 and the third capacitor C3 may be set according to actual needs, for example, in an optional embodiment, the value range of the second inductor L2 may be 2.2nH to 2.6nH, and the value range of the second capacitor C2 may be 0.4pF to 0.8 pF. Because the embodiment of the utility model provides an adopt second inductance L2 and third electric capacity C3 to establish ties and form second resonant circuit 13, its simple structure is convenient for realize.

Further, referring to fig. 2, in the embodiment of the present invention, the electronic device further includes a second antenna arm 14, the second antenna arm 14 is disposed at an interval relative to the first end of the first antenna arm 10, and one end of the second antenna arm 14 is coupled to the first antenna arm 10, and the other end is grounded.

In this embodiment, since the second antenna arm 14 is provided to be coupled to the first antenna arm 10, the bandwidth of the frequency band of the antenna can be enhanced, so that the real part of the input impedance of the N41 and N79 frequency bands is closer to 50 ohms, which is more beneficial to tuning on the main feed.

Optionally, the arrangement form and the position of the first antenna arm 10 and the second antenna arm 14 may be set according to actual needs, for example, in an optional embodiment, the electronic device includes a metal frame, and the first antenna arm 10 and the second antenna arm 14 are both part of the metal frame.

Optionally, referring to fig. 1 and 2, a value of a gap width D1 formed between the first end of the first antenna arm and the second antenna arm ranges from 1mm to 1.8 mm. The length A1 of the first antenna arm ranges from 10mm to 15 mm. The length A2 of the second antenna arm ranges from 3mm to 8 mm. The distance A3 between the feeding point and the first end ranges from 2mm to 8 mm.

For better understanding of the embodiments of the present invention, the following antenna design with D1 of 1.5mm, a1 of 12mm, a2 of 6mm and A3 of 4.5mm is described in detail.

Referring to fig. 3 and 4, in an initial state where tuning matching is not performed on each frequency band signal, the S11 parameter of each frequency band signal is as shown in fig. 3, and the corresponding impedance distribution is as shown in fig. 4.

The state after tuning and matching the signals of each frequency band can be described with respect to the case where the second antenna arm is provided and the case where the second antenna arm is not provided.

Optionally, in an embodiment, in a case that the second antenna arm is not provided, the following scheme may be adopted for performing the coordination matching: the first capacitor C1 is set to be 0.5pF, the second capacitor is set to be 0.6pF, the third capacitor is set to be 0.5pF, the first inductor is set to be 1.8nH, and the second inductor is set to be 2.5nH, at this time, the S11 parameter of each frequency band signal is as shown in fig. 5, the corresponding impedance distribution is as shown in fig. 6, and the antenna efficiency is as shown in fig. 7.

In another embodiment, in the case of providing the second antenna arm, the following scheme may be adopted for the coordination matching: setting the first capacitor C1 as 0.4pF, the second capacitor as 1pF, the third capacitor as 0.7pF, the first inductor as 1.5nH, and the second inductor as 2nH, at this time, the S11 parameter of each frequency band signal is as shown in fig. 8, the corresponding impedance distribution is as shown in fig. 9, and the antenna efficiency is as shown in fig. 10.

It can be seen from combining fig. 3 to fig. 10 that the embodiment of the utility model provides a tune the matching through adopting first electric capacity, second electric capacity, third electric capacity, first inductance and second inductance to antenna signal, can increase signal coverage, improve the antenna efficiency in the frequency band of coverage.

It should be noted that, in the embodiment of the present invention, coverage in four Global standard frequency ranges (N41, N77, N78, and N79) of Sub-6G can be realized through a feeding point (which can also be understood as a feeding port or a feed source), and in addition, the antenna application in other frequency ranges can be extended through the matching design of the antenna length and each component, for example, the design of the medium and high frequency range in Long Term Evolution (LTE), wideband Code Division Multiple Access (wideband Code Division Multiple Access, WCDMA), and Time Division Synchronous Code Division Multiple Access (Time Division-Synchronous Code Division Multiple Access, TD-CDMA), and the frequency range design of Global Positioning System (Global Positioning System, GPS), WIFI-2.4G, Bluetooth (BT), and WIFI-5G.

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

1. An electronic device comprising a first antenna arm, a feed, a first capacitor, and a first resonant circuit;

2. The electronic device of claim 1, wherein the first resonant circuit comprises a first inductance and a second capacitance; one end of the first inductor is electrically connected with the feed point through the first capacitor, and the other end of the first inductor is grounded; the second capacitor is connected in parallel with the first inductor.

3. The electronic device of claim 1, further comprising a second resonant circuit connected in series between the first capacitor and the feed for adjusting the antenna impedance.

4. The electronic device of claim 3, wherein the second resonant circuit comprises a second inductor and a third capacitor, one end of the second inductor is electrically connected to the feeding point through the first capacitor, and the other end of the second inductor is electrically connected to the feed source through the third capacitor.

5. The electronic device according to any one of claims 1 to 4, wherein the electronic device further comprises a second antenna arm, the second antenna arm is spaced apart from the first end of the first antenna arm, and one end of the second antenna arm is coupled to the first antenna arm and the other end is grounded.

6. The electronic device of claim 5, wherein the electronic device comprises a metal bezel, and wherein the first antenna arm and the second antenna arm are both part of the metal bezel.

7. The electronic device of claim 5, wherein a width of a gap formed between the first end of the first antenna arm and the second antenna arm ranges from 1mm to 1.8 mm.

8. The electronic device of claim 5, wherein a length of the second antenna arm ranges from 3mm to 8 mm.

9. The electronic device of claim 1, wherein a length of the first antenna arm ranges from 10mm to 15 mm.

10. The electronic device of claim 1, wherein a distance between the feeding point and the first end ranges from 2mm to 8 mm.