Antenna assembly and user equipment

Abstract

The utility model relates to the field of electronic equipment, in particular to an antenna assembly and user equipment. According to one aspect of the present disclosure, an antenna assembly is provided, the antenna assembly comprising a coupling radiator; the first feed branch and the second feed branch are used for carrying out coupled feed on the coupled radiator; the first feed source and the second feed source provide feed for the first feed branch and the second feed branch respectively, and a feed branch section of the first feed branch and the structure of the coupling radiator are basically in mirror symmetry.

Description

Technical Field

[0001] The present disclosure relates to the field of communication devices, and more particularly to an antenna assembly and a user equipment. Background Art

[0002] In the antenna design of a communication device (or user equipment), there is a problem of insufficient internal design space of the device. Therefore, it is necessary to make full use of the device housing or the appearance surface (outer shell) to participate in the design in order to better improve the antenna performance. There are the following problems in the antenna design on the outer shell of a communication device: one is that a direct feeding scheme cannot be adopted because it is difficult to implement the perforation method and it will also affect the appearance effect, and the other is that it is difficult to achieve the design of dual-antenna coexistence. In addition, the antenna feeding effect in the case of dual-antenna coexistence also needs to be further improved. Summary of the Utility Model

[0003] In view of the above problems, the present disclosure aims to provide an antenna assembly and a user equipment.

[0004] According to a first aspect of the present disclosure, there is provided an antenna assembly, the antenna assembly including a coupled radiator; a first feeding branch and a second feeding branch for coupling feeding the coupled radiator; and a first feeding power source and a second feeding power source for respectively providing a feeding input signal to the first feeding branch and the second feeding branch, wherein the feeding stub of the first feeding branch together with the structure of the coupled radiator is mirror symmetric.

[0005] According to the antenna assembly of an embodiment of the present disclosure, wherein the first feeding branch is configured to excite a first working mode of the coupled radiator, and the second feeding branch is configured to excite a second working mode of the coupled radiator.

[0006] According to the antenna assembly of an embodiment of the present disclosure, wherein at least one of the first feeding branch and the second feeding branch includes a matching circuit.

[0007] According to the antenna assembly of an embodiment of the present disclosure, wherein the matching circuit is configured to increase the overlapping ratio of the working frequency bands of the first feeding branch and the second feeding branch.

[0008] According to the antenna assembly of an embodiment of the present disclosure, wherein the matching circuit is configured to increase the overlapping ratio of the overlapping part of the working frequency bands and the isolation frequency band for the isolation frequency band between the first feeding branch and the second feeding branch.

[0009] According to the antenna assembly of an embodiment of the present disclosure, wherein the matching circuit is configured to adjust the first feeding branch and / or the second feeding branch to make its working frequency band wider and the absolute value of the reflection parameter of the working frequency band larger.

[0010] The antenna assembly according to an embodiment of the present disclosure, wherein the first feed branch receives the feed input signal from the first feed source through its midpoint.

[0011] The antenna assembly according to an embodiment of the present disclosure, wherein the structure of the coupled radiator is symmetric and non-closed.

[0012] The antenna assembly according to an embodiment of the present disclosure, wherein the total length of the coupled radiator is half of the wavelength corresponding to its operating frequency.

[0013] According to a second aspect of the present disclosure, there is provided a user equipment, wherein the user equipment includes the antenna assembly according to the first aspect of the present disclosure.

[0014] The user equipment according to an embodiment of the present disclosure, wherein the user equipment further includes a housing, and the coupled radiator is arranged on the housing.

[0015] The antenna assembly and the user equipment of the present disclosure can realize antenna scheme design on the glass or ceramic appearance surface of handheld terminal products such as mobile phones, so as to maximize the use of the overall antenna design space and improve the antenna performance. At the same time, the antenna assembly and the user equipment of the present disclosure implement a dual-antenna coexistence scheme design that shares a coupled radiator, so as to achieve multi-antenna design in a smaller space and improve the antenna feeding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or other aspects and advantages of the present disclosure will become clearer and easier to understand through the following description of various aspects in conjunction with the drawings, and the same or similar units in the drawings are denoted by the same reference numerals. The drawings include:

[0017] Figure 1 A schematic structural diagram of an antenna assembly according to an embodiment of the present disclosure is shown;

[0018] Figure 2A An S-parameter diagram of an antenna assembly without a matching circuit is shown;

[0019] Figure 2B An S-parameter diagram of an antenna assembly with a matching circuit is shown;

[0020] Figure 3A A current distribution diagram under the working condition of the first feed branch is shown;

[0021] Figure 3B A current distribution diagram under the working condition of the second feed branch is shown; and

[0022] Figure 4A schematic block diagram of a user equipment 200 according to an embodiment of the present disclosure is shown. Detailed implementation manners

[0023] The following describes some of the multiple embodiments of the present disclosure, aiming to provide a basic understanding of the present disclosure. It is not intended to identify the key or decisive elements of the present disclosure or to limit the scope to be protected.

[0024] For the sake of simplicity and illustrative purposes, the principles of the present disclosure are mainly described herein with reference to its exemplary embodiments. However, those skilled in the art will readily recognize that the same principles can be equivalently applied to all types of antenna assemblies and user equipment and can be implemented therein, and any such variations do not depart from the true spirit and scope of this patent application.

[0025] Moreover, in the following description, reference is made to the accompanying drawings, which illustrate specific exemplary embodiments. Electrical, mechanical, logical, and structural changes can be made to these embodiments without departing from the spirit and scope of the present disclosure. In addition, although a feature of the present disclosure is disclosed in combination with only one of several embodiments / embodiments, this feature can be combined with one or more other features of other embodiments / embodiments as may be desired and / or advantageous for any given or identifiable function. Therefore, the following description should not be construed in a limiting sense, and the scope of the present disclosure is defined by the appended claims and their equivalents.

[0026] Terms such as "comprising" and "including" mean that in addition to having the units (modules) and steps directly and explicitly stated in the specification and claims, the technical solutions of the present disclosure do not exclude the situation of having other units (modules) and steps that are not directly or explicitly stated.

[0027] Figure 1 A schematic structural diagram of an antenna assembly according to an embodiment of the present disclosure is shown.

[0028] As Figure 1As shown, the antenna assembly includes a coupled radiator, a first feeding branch, a second feeding branch, a first feeding power source, and a second feeding power source. The first feeding power source and the second feeding power source respectively provide feeding input signals for the first feeding branch and the second feeding branch. Specifically, the first feeding branch and the second feeding branch perform coupled feeding on the coupled radiator. Among them, the feeding stub of the first feeding branch and the structure of the coupled radiator are substantially mirror-symmetrical. In some examples, the feeding branch can feed current to the feeding stub via the center point of the feeding stub. Note that the term "substantially mirror-symmetrical" indicates that the design goal of the structure is to be geometrically symmetrical, but due to the constraints of actual manufacturing conditions, there may be slight deviations. Therefore, in this article, "substantially mirror-symmetrical" and "mirror-symmetrical" can be used interchangeably. This structure realizes the sharing of the same coupled radiator by two feeding branches (feeding stubs), saving the space required for the layout of the antenna assembly.

[0029] Optionally, the first feeding branch can be configured to excite a first operating mode of the coupled radiator, such as a common mode. Specifically, the first feeding branch and the coupled radiator form a first antenna. The first feeding branch is provided with a feeding input signal by the first feeding power source S1, and the first antenna is excited to generate a common mode signal (electromagnetic wave). The first antenna is mirror-symmetrical with the feeding point (for example, the point on the coupled radiator corresponding to the center point of the feeding stub) as the center. When the coupled radiator is fed, the electrons on the two mirror-symmetrical conductor arms will change in the same way at the same time, generating two current signals with the same amplitude and with directions and phases mirror-symmetrical about the center point of the coupled radiator (as Figure 3A shown).

[0030] Optionally, the second feeding branch can be configured to excite a second operating mode of the coupled radiator, such as a differential mode. In Figure 1 , the second feeding branch and the coupled radiator can form a second antenna. The second feeding branch is provided with a feeding input signal by the second feeding power source S2. The second antenna is excited to generate a differential mode signal. Specifically, in the second antenna, the feeding stub of the second feeding branch and the structure of the coupled radiator do not need to be mirror-symmetrical. As Figure 1 shown, the feeding stub of the second feeding branch can be located at any position below the coupled radiator (for example, any position except the two ends of the coupled radiator and the middle position where the first feeding branch is located), thereby enabling the second antenna to be excited to generate a unidirectional, half-envelope half-wave resonant current (as Figure 3B shown).

[0031] Continue to refer to Figure 1, in some examples, in the antenna assembly, the first feed branch may include a first matching circuit, and the second feed branch may include a second matching circuit. Specifically, when it comes to matching circuits, common devices include inductors and / or capacitors, and these devices can be combined into different types of circuits to optimize the impedance matching of the antenna port and tune the operating frequency point, and are used to adjust the impedance of the antenna port to achieve maximum power transfer. These matching circuits may include, for example, LC matching circuits, L-type matching circuits, π-type matching circuits, etc. The matching circuit can be configured to adjust the operating frequency band by adjusting the capacitance value of the capacitive element and / or the inductance value of the inductive element. In addition, in some other embodiments, the adjustment of the matching circuit can not only be directed at the overlap degree of the frequency bands, but also adjust the width of the operating frequency band of the antenna feed and the absolute value of the reflection S parameter.

[0032] Specifically, in the case where no matching circuit is configured in the antenna assembly described herein, referring to the experimental S parameter diagram of the antenna assembly without a matching circuit as shown in Figure 2A , when the above two antennas (the first antenna and the second antenna) work simultaneously, the port S parameter curve that is not optimized by the matching circuit. Among them, S1,1 and S2,2 are the respective feeding conditions of the first antenna and the second antenna (the S parameter changes with the feeding frequency). And S1,2 and S2,1 are the isolation conditions of the first antenna and the second antenna from each other, so S1,2 and S2,1 reflect the mutual isolation and interference conditions between the two ports of the first antenna and the second antenna. It can be seen from this port S parameter curve that when no matching circuit is configured, the operating frequency bands of the first antenna and the second antenna both have dips in a certain frequency band, and this frequency band of the dip part can be used as the operating frequency band of the first antenna and the second antenna. And S1,2 and S2,1 highly coincide, and there is a high isolation dip point near the original operating frequency bands of the two antennas ( Figure 2A near 2 GHz).

[0033] In the frequency band where the high isolation dip point is generated in the two operating modes, the current distributions of the first antenna and the second antenna can each exert a greater isolation effect relative to each other, greatly reducing the influence of crosstalk. As shown in Figure 3A , when the first feed branch (feed branch 1) is operating (i.e., the first antenna is operating in the first operating mode), the current distribution is symmetric along the conductor arm, that is, the current intensities on the two conductor arms are equal, and the maximum value of the current intensity usually appears at the position closest to the feeding point, and then gradually decreases as the distance from the feeding point increases until it reaches the end of the conductor arm, thus forming a standing wave field, presenting a sine or cosine form. And as shown in Figure 3BAs shown in [figure], when the second feeding branch (feeding branch 2) is operating (i.e., the second antenna is operating in the second operating mode), the current distribution is unidirectional along the conductor arm. However, the current intensity is also the largest in the middle of the radiator, and the current intensity gradually decreases from the middle of the radiator towards both sides until it reaches the top or end of the antenna, where the current intensity is zero.

[0034] As an example, the matching circuit can be configured to increase the proportion of the overlapping parts of the operating frequency bands of the first antenna and the second antenna, that is, for example Figure 2A the depressions of S1,1 and S2,2 overlap more. Additionally or alternatively, the matching circuit can also be configured to increase the proportion of the overlapping parts of the operating frequency bands and the overlapping parts of the isolation frequency band (i.e., the high isolation notch or notch section) between the first antenna and the second antenna. And, in some examples, the adjustment of the matching circuit can also focus on the width of the operating frequency band. For example, it can be more inclined to use the adjustment of the matching circuit to adjust the width of the operating frequency band of the first antenna or the second antenna, or it can be more inclined to use the adjustment of the matching circuit to adjust the absolute value of the S-parameters of the operating frequency band of the first antenna or the second antenna, so as to obtain a better antenna feeding frequency response in the operating frequency band. It should be noted that in one or more embodiments, the matching circuit can include the first matching circuit and / or the second matching circuit as described above, that is, only one of the first matching circuit and the second matching circuit can be configured, or both can be configured. Or, in some other embodiments, the first feeding branch and the second feeding branch can both be not provided with a matching circuit, and relevant hardware (such as the length and position of the feeding stub, the length and shape of the coupled radiator) can be adjusted before the antenna assembly of the present disclosure is used, so that the antenna assembly without a matching circuit can also achieve many benefits described in this article.

[0035] Therefore, as Figure 2B shown in the experimental S-parameter change diagram in [figure], in one or more embodiments, by combining the optimization of the matching circuit, the antenna assembly can adjust the operating frequency bands of the two antennas (S1,1 and S2,2) and the isolation frequency band (S1,2) of the high isolation notch to be in approximately the same frequency band (i.e., the lower concave part of the isolation frequency band (S1,2 line) of the high isolation notch and the operating frequency band overlap more, for example Figure 2B near 2 GHz in [figure]), that is, the matching circuit can finely adjust two frequency bands with not so good overlapping conditions to make the overlapping conditions better. Note that in Figure 2B [figure], since the S-parameter curves of the interference of the first antenna on the second antenna and the interference of the second antenna on the first antenna highly overlap, only the interference S1,2 of the first antenna on the second antenna is shown here.

[0036] In one or more embodiments, the feed branch further includes a feed power source or a feed signal source, and the feed power source provides a feed input signal for the feed stub. Among them, the first feed power source provides a feed input signal for the first feed branch, and the second feed power source provides a feed input signal for the second feed branch. Optionally, the first feed branch receives the feed input signal from the feed power source through its midpoint. Generally speaking, radio frequency signals on the main board PCB (Printed Circuit Board) can be used as the feed power source or the feed signal source to provide the feed input signal for the feed stub.

[0037] In one or more embodiments, the structure of the coupled radiator is symmetric and non-closed. The coupled radiator of the antenna is designed to be an open structure to ensure good radiation efficiency, radiation directivity, and impedance matching. The open coupled radiator can better promote the current to flow in the expected direction and effectively radiate electromagnetic waves. It can be understood that in Figure 1 a U-shaped coupled radiator is shown, but the coupled radiator in the present disclosure can be of any geometric shape (such as a straight line type) and has a non-closed loop notch and a symmetric structure.

[0038] Moreover, in some embodiments, the total length of the coupled radiator is half (or approximately half) of the wavelength corresponding to the operating frequency of the feed branch. Therefore, in hardware design, the length of the coupled radiator can be designed according to the operating frequency of the configured feed branch, so that the coupled radiator is symmetric, non-closed, and the length of each side of the symmetry is approximately one-quarter of the wavelength, and the total length of the coupled radiator is approximately half of the wavelength.

[0039] In summary, by using the above-described mode isolation technical solution, a dual-antenna coexistence scheme design with a shared radiator can be realized, thereby achieving a multi-antenna design in a smaller space and achieving a better antenna radiation and feeding effect.

[0040] Figure 4 A schematic block diagram of a user equipment 200 according to an embodiment of the present disclosure is shown. As Figure 4 shown, the user equipment 200 includes a feeding part 202 and a coupled radiator 204 arranged outside the housing of the user equipment (such as the outer surface or the inner surface of the housing).

[0041] Specifically, the coupled radiator 204 can be attached to the outer surface of the housing of the user equipment 200 without penetrating the housing of the user equipment 200, thereby maintaining the integrity of the housing. The feeding part 202 is designed inside the user equipment 200, and the feeding part 202 may include (not shown) a first feed branch, a second feed branch, and / or a first feed power source, a second feed power source, and optionally may include a first matching circuit and a second matching circuit.

[0042] In summary, by using the design of placing the coupled radiator 204 outside the outer housing of the user equipment 200 and placing the feeding part 202 inside the user equipment 200, it is possible to improve the performance, signal quality and user experience of the user equipment while simplifying the structure of the user equipment, optimizing the space layout and reducing electromagnetic interference.

[0043] The above mainly describes the antenna assembly and user equipment of the present disclosure. Although only some specific embodiments of the present disclosure have been described, those of ordinary skill in the art should understand that the present disclosure can be implemented in many other forms without departing from its gist and scope. Therefore, the examples and embodiments shown are regarded as illustrative rather than restrictive, and the present disclosure may cover various modifications and substitutions without departing from the spirit and scope of the present disclosure as defined by the appended claims.

Claims

1. An antenna assembly, characterized in that: The antenna assembly comprises: coupled radiators; a first feeding branch and a second feeding branch for coupling and feeding the coupled radiator; and A first feeding power source and a second feeding power source for providing feeding input signals to the first feeding branch and the second feeding branch respectively; The structures of the feeding branch section of the first feeding branch and the coupled radiator are mirror-symmetrical.

2. The antenna assembly according to claim 1, characterized in that: The first feeding branch is configured to excite a first working mode of the coupled radiator, and the second feeding branch is configured to excite a second working mode of the coupled radiator.

3. The antenna assembly according to claim 1, characterized in that: At least one of the first feeding branch and the second feeding branch includes a matching circuit.

4. The antenna assembly according to claim 3, characterized in that: in, The matching circuit is configured to increase the ratio of the overlap between the working frequency band of the first feeding branch and the working frequency band of the second feeding branch.

5. The antenna assembly according to claim 4, characterized in that: The matching circuit is configured to increase the ratio of the overlapping portion of the working frequency bands to the overlapping portion of the isolation frequency band for the isolation frequency band between the first feeding branch and the second feeding branch.

6. The antenna assembly according to claim 3, characterized in that: The matching circuit is configured to adjust the first feeding branch and / or the second feeding branch so that an operating frequency band thereof is wider and an absolute value of a reflection parameter of the operating frequency band is larger.

7. The antenna assembly according to claim 1, characterized in that: The first feeding branch receives the feeding input signal from the first feeding source through a midpoint thereof.

8. The antenna assembly according to claim 1, characterized in that: The structure of the coupled radiator is symmetrical and non-closed, and the total length of the coupled radiator is half of the wavelength corresponding to its operating frequency.

9. A user equipment, characterized in that: The user equipment comprises an antenna assembly according to any one of claims 1-8.

10. The user equipment according to claim 9, characterized in that The user equipment further includes a housing, and the coupled radiator is arranged in the housing.

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