CN117613539A

CN117613539A - Antenna assembly and electronic equipment

Info

Publication number: CN117613539A
Application number: CN202311819845.9A
Authority: CN
Inventors: 张彩文
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2023-12-26
Filing date: 2023-12-26
Publication date: 2024-02-27

Abstract

The application provides an antenna assembly, including conducting plate, ground plate, conducting wall, feed and matching unit. The conductive plate includes a first side, a second side, and a first connecting side connected between the first and second sides. The grounding plate is parallel to the conductive plate and arranged at intervals, and comprises a third side, a fourth side and a second connecting side connected between the third side and the fourth side, and is grounded. The conductive wall is connected between the first and second connection edges for connecting the first connection edge to ground. The conductive plate, the ground plate and the conductive wall form a cavity antenna with two opening sides, the first side and the third side are two opposite sides of one opening side, and the second side and the fourth side are two opposite sides of the other opening side. The cavity antenna supports the reception of electromagnetic wave signals of two frequency bands under the excitation of the feed source and the impedance matching adjustment of the matching unit. The application also provides electronic equipment. The method and the device can ensure the antenna performance in an effective headroom area.

Description

Antenna assembly and electronic equipment

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna assembly and an electronic device having the antenna assembly.

Background

At present, with the popularization of 5G communication technology, the communication experience of people is better, but the number of antennas is also increased. With the pursuit of high screen ratio, the full-screen electronic device has become the mainstream, and the metal rear cover has become the mainstream rear cover adopted by more electronic devices due to the better hand feeling and better heat dissipation of the metal rear cover. In this case, the current electronic device leaves less and less headroom for the antenna, which results in reduced performance of the antenna or takes up space for other functional devices, which affects the functions of other functional devices.

Disclosure of Invention

The application provides an antenna assembly and electronic equipment, so as to solve the problem.

In a first aspect, an antenna assembly is provided that includes a conductive plate, a ground plate, a conductive wall, a feed, and a matching unit. The conductive plate includes a first side, a second side, and at least one first connection side connected between the first side and the second side, wherein the first side is connected with the second side. The grounding plate is parallel to the conducting plate and arranged at intervals, the grounding plate comprises a third side, a fourth side and at least one second connecting side connected between the third side and the fourth side, the third side is connected with the fourth side, and the grounding plate is grounded. The conductive wall is connected between the at least one first connection edge and the at least one second connection edge for connecting the at least one first connection edge of the conductive plate to ground. The matching unit is coupled among the conducting plate, the grounding plate and the feed source and is used for realizing impedance matching adjustment. The first side and the third side are opposite and are arranged at intervals, the second side and the fourth side are opposite and are arranged at intervals, the conducting plate, the grounding plate and the conducting wall form a cavity antenna with two opening side surfaces, the first side and the third side are two opposite sides of one opening side surface, and the second side and the fourth side are two opposite sides of the other opening side surface; the cavity antenna is used for supporting the reception of electromagnetic wave signals of at least two frequency bands under the excitation of the feed source and the impedance matching adjustment of the matching unit.

In a second aspect, there is also provided an electronic device comprising an antenna assembly comprising a conductive plate, a ground plate, a conductive wall, a feed, and a matching unit. The conductive plate includes a first side, a second side, and at least one first connection side connected between the first side and the second side, wherein the first side is connected with the second side. The grounding plate is parallel to the conducting plate and arranged at intervals, the grounding plate comprises a third side, a fourth side and at least one second connecting side connected between the third side and the fourth side, the third side is connected with the fourth side, and the grounding plate is grounded. The conductive wall is connected between the at least one first connection edge and the at least one second connection edge for connecting the at least one first connection edge of the conductive plate to ground. The matching unit is coupled among the conducting plate, the grounding plate and the feed source and is used for realizing impedance matching adjustment. The first side and the third side are opposite and are arranged at intervals, the second side and the fourth side are opposite and are arranged at intervals, the conducting plate, the grounding plate and the conducting wall form a cavity antenna with two opening side surfaces, the first side and the third side are two opposite sides of one opening side surface, and the second side and the fourth side are two opposite sides of the other opening side surface; the cavity antenna is used for supporting the reception of electromagnetic wave signals of at least two frequency bands under the excitation of the feed source and the impedance matching adjustment of the matching unit.

The antenna assembly and the electronic equipment can radiate through the side face of the opening through forming the cavity antenna, and can achieve good antenna radiation performance only by needing to have a certain clearance near the side face of the opening, so that the requirement on a clearance area is small, and the antenna assembly and the electronic equipment can be applied to an environment with a small clearance area. In addition, in the application, through coupling in the current conducting plate the ground plate reaches the matching unit between the feed realizes impedance matching and adjusts, can make the cavity antenna supports the receipt of the electromagnetic wave signal of two frequency channels at least, can satisfy the demand of current multiband, also can effectively promote whole communication performance.

Drawings

In order to more clearly describe the technical solutions in the embodiments or the background of the present application, the following description will describe the drawings that are required to be used in the embodiments or the background of the present application.

Fig. 1 is a simplified schematic diagram of an antenna assembly in some embodiments of the present application.

Fig. 2 is a schematic diagram of an electric field distribution of a reference antenna assembly.

Fig. 3 is a schematic diagram of electric field distribution of an antenna assembly in some embodiments of the present application.

Fig. 4 is another simplified structural schematic diagram of an antenna assembly in some embodiments of the present application.

Fig. 5 is a schematic diagram of yet another simple structure of an antenna assembly in some embodiments of the present application.

Fig. 6 is a schematic diagram of yet another simple structure of an antenna assembly in some embodiments of the present application.

Fig. 7 is a schematic structural diagram of a matching unit in some embodiments of the present application.

Fig. 8 is a further schematic structural diagram of a matching unit in some embodiments of the present application.

Fig. 9 is a schematic diagram of current distribution of an antenna assembly according to some embodiments of the present application operating in a first frequency band.

Fig. 10 is a schematic diagram of current distribution of an antenna assembly according to some embodiments of the present application operating in a second frequency band.

Fig. 11 is a schematic diagram of other simple structures of an antenna assembly in some embodiments of the present application.

Fig. 12 is a schematic view of yet another simple structure of an antenna assembly in some embodiments of the present application.

Fig. 13 is a simple structural diagram illustrating a part of the internal structure of an electronic device in some embodiments of the present application.

Fig. 14 is a return loss schematic diagram of an antenna assembly included in the electronic device in some embodiments of the present application.

Fig. 15 is a schematic diagram of radiation efficiency and overall system efficiency curves of an antenna assembly included in the electronic device according to some embodiments of the present application.

Fig. 16 is an antenna pattern of an antenna assembly of an electronic device according to some embodiments of the present application when the antenna assembly is operating in a first frequency band.

Fig. 17 is an antenna pattern of an antenna assembly of an electronic device according to some embodiments of the present application when the antenna assembly is operating in a second frequency band.

Fig. 18 is a schematic diagram showing a part of the internal structure of the electronic device in some embodiments of the present application, as viewed from the display screen side.

Fig. 19 is a side view schematically illustrating a part of the structure of an electronic device in some embodiments of the application.

Fig. 20 is another side view of a schematic partial structure of an electronic device in some embodiments of the present application.

Fig. 21 is a simplified schematic structural diagram of another schematic part of the internal structure of the electronic device in some embodiments of the present application.

Fig. 22 is a simplified schematic structural diagram illustrating still another partial internal structure of the electronic device in some embodiments of the present application.

Fig. 23 is a simplified schematic structure illustrating a part of the internal structure in still another embodiment of the present application.

Fig. 24 is a simplified overall schematic of an electronic device in some embodiments of the present application.

Fig. 25 is a simplified plan view schematic diagram of an electronic device in some embodiments of the application.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.

In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "thickness", "width", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not imply or indicate that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The term "coupled" in this application, unless otherwise indicated, shall mean physically connected, and, if so stated, shall also include electrical, direct, or indirect. In the description of the embodiments of the present invention, the terms "first", "second", "third", "fourth", etc. are not specific, but rather, in order to distinguish the same-named objects, the terms "first", "second", "third", "fourth", etc. refer to the same-named objects in the case of the description. Wherein "A/B" in the present application refers to A or B. Wherein the term "coupled" in this application includes both direct and indirect connections.

Referring to fig. 1, a simplified structure of an antenna assembly 1 according to some embodiments of the present application is shown. As shown in fig. 1, the antenna assembly 1 includes a conductive plate 11, a ground plate 12, a conductive wall 13, a feed 14, and a matching unit 15. The conductive plate 11 includes a first side B11, a second side B12, and at least one first connection side B13 connected between the first side B11 and the second side B12, wherein the first side B11 is connected with the second side B12. The grounding plate 12 is parallel to the conductive plate 11 and is disposed at intervals, the grounding plate 12 includes a third side B21, a fourth side B22, and at least one second connecting side B23 connected between the third side B21 and the fourth side B22, wherein the third side B21 is connected to the fourth side B22, and the grounding plate 12 is grounded. The conductive wall 13 is connected between the at least one first connection edge B13 and the at least one second connection edge B23 for connecting the at least one first connection edge B13 of the conductive plate 11 to ground. The matching unit 15 is coupled among the conductive plate 11, the ground plate 12 and the feed source 14, and is used for realizing impedance matching adjustment. The first side B11 is opposite to the third side B21 and is disposed at a distance, the second side B12 is opposite to the fourth side B22 and is disposed at a distance, the conductive plate 11, the ground plate 12 and the conductive wall 13 form a cavity antenna T1 having two open sides S1 and S2, the first side B11 and the third side B21 are two opposite sides of one open side S1, and the second side B12 and the fourth side B22 are two opposite sides of the other open side S2. The cavity antenna T1 is configured to support reception of electromagnetic wave signals in at least two frequency bands under excitation of the feed source 14 and impedance matching adjustment of the matching unit 15.

Among them, in this application, through forming cavity antenna T1, can radiate through the opening side, and only need have near the opening side certain headroom can realize better antenna radiation performance to the demand to the headroom area is very little, can use in the very little environment of headroom area. In addition, in the present application, the matching unit 15 coupled between the conductive plate 11, the ground plate 12 and the feed source 14 is used to implement impedance matching adjustment, so that the cavity antenna T1 supports at least two frequency bands of electromagnetic wave signal reception, and can meet the current multi-band requirement, and also can effectively improve the overall communication performance.

In this application, the first edge B11 is connected to the second edge B12, and the at least one first connection edge B13 is connected between the first edge B11 and the second edge B12, so that 0, the first edge B11, the second edge B12, and the at least one first connection edge B13 connected between the first edge B11 and the second edge B12 form a complete outer periphery of the conductive plate 11. The third side B21 is connected to the fourth side B22, and the at least one second connecting side B23 is connected between the third side B21 and the fourth side B22, so that the third side B21, the fourth side B22, and the at least one second connecting side B23 connected between the third side B21 and the fourth side B22 form a complete outer periphery of the ground plate 12. And is connected between the at least one first connecting side B13 and the at least one second connecting side B23 by the conductive wall 13, the at least one first connecting side B13 of the conductive plate 11 is connected to the ground, the first side B11 is spaced from the third side B21, the second side B12 is spaced from the fourth side B22, so that the first side B11 and the third side B21 constitute two opposite sides of one of the open sides S1, the second side B12 and the fourth side B22 constitute two opposite sides of the other open side S2, and the other sides of the cavity antenna T1 constitute closed sides by the conductive wall 13, so that the conductive plate 11, the ground plate 12, and the conductive wall 13 form the cavity antenna T1 having the two open sides S1, S2.

The lengths of the first side B11 and the second side B12 are the dimensions in the length direction of the first side B11 and the second side B12, that is, the corresponding directions along the peripheral edge of the conductive plate 11.

Wherein, as shown in fig. 1, the first edge B11 includes a first end D1 and a second end D2 that are opposite, the second edge B12 includes a third end D3 and a fourth end D4 that are opposite, the first end D1 of the first edge B11 and the third end D3 of the second edge B12 are connected, and the at least one first connection edge B13 is connected between the second end D2 of the first edge B11 and the fourth end D4 of the second edge B12. The third side B21 includes a fifth end D5 and a sixth end D6 that are opposite, the fourth side B22 includes a seventh end D7 and an eighth end D8 that are opposite, the fifth end D5 of the third side B21 and the seventh end D7 of the fourth side B22 are connected, and the at least one second connecting side B23 is connected between the sixth end D6 of the third side B21 and the eighth end D8 of the fourth side B22.

Thus, in the present application, the corresponding terminals of the first side B11 and the second side B12 are connected together, and the at least one first connection side B13 is connected between the other corresponding terminals of the first side B11 and the second side B12, so as to form a complete outer periphery of the conductive plate 11. The two corresponding terminals of the third side B21 and the fourth side B22 are connected together, while the at least one second connecting side B23 is connected between the other two corresponding terminals of the third side B21 and the fourth side B22, while the connection forms a complete outer periphery of the ground plate 12.

In some embodiments, as shown in fig. 1, the projection of the first edge B11, the second edge B12, and the at least one first connection edge B13 of the conductive plate 11 on the ground plate 12 coincides with the third edge B21, the fourth edge B22, and the at least one second connection edge B23, respectively.

That is, in some embodiments, the projection of the first side B11 of the conductive plate 11 onto the ground plate 12 coincides with the third side B21; the projection of the second side B12 of the conductive plate 11 onto the ground plate 12 coincides with the fourth side B22; the projection of at least one first connecting edge B13 of the conductive plate 11 onto the ground plate 12 coincides with the at least one second connecting edge B23. Thus, the projection of the conductive plate 11 on the ground plate 12 coincides with the ground plate 12, so as to form a better cavity antenna T1.

It is obvious that the overlapping of a and B in the present application is not strictly overlapping, but is generally overlapping, and a deviation of a and B parallel to each other and a distance smaller than a predetermined distance, for example, 5mm (millimeters), or a and B intersecting each other, and an included angle of the two is smaller than a predetermined angle, for example, 20 ° may be regarded as overlapping.

In some embodiments, the first side B11 and the second side B12 are both straight and vertically connected, and the third side B21 and the fourth side B22 are both straight and vertically connected; the number of the at least one first connecting edge B13 is at least one, each first connecting edge is in a straight line shape, an arc shape or an irregular shape, the number of the at least one second connecting edge B23 is at least one, and each second connecting edge B23 is in a straight line shape, an arc shape or an irregular shape.

That is, in some embodiments, the first side B11 and the second side B12 are both straight and vertically connected, the third side B21 and the fourth side B22 are both straight and vertically connected, and the number and shape of the at least one first connecting side B13 and the at least one second connecting side B23 may be set as required.

In this application, the connection between a and B is not strictly vertical, but is substantially vertical, for example, the angle between a and B may be between 80 ° and 100 °, and so on, which may be regarded as vertical.

In this application, the shapes of the first side B11, the second side B12, and the at least one first connection side B13 may be the projected shapes of the first side B11, the second side B12, and the at least one first connection side B13 along the thickness direction of the conductive plate 11, and the shapes of the third side B21, the fourth side B22, and the at least one second connection side B23 may be the projected shapes of the third side B21, the fourth side B22, and the at least one second connection side B23 along the thickness direction of the ground plate 12. In some embodiments, since the conductive plate 11 and the ground plate 12 are plate-shaped and have a thickness that is negligible with respect to the projected areas of the conductive plate 11 and the ground plate 12 along the respective thickness directions, the first edge B11, the second edge B12, the at least one first connection edge B13 are peripheral edges, i.e. contour edges, of the conductive plate 11, and the third edge B21, the fourth edge B22, and the at least one second connection edge B23 are peripheral edges, i.e. contour edges, of the ground plate 12.

In some embodiments, as shown in fig. 1, the at least one first connecting edge B13 includes two first connecting edges B13, and the two first connecting edges B13 are linear and sequentially connected between the second end D2 of the first edge B11 and the fourth end D4 of the second edge B12; the at least one second connecting edge B23 includes two second connecting edges B23, and the two second connecting edges B23 are linear and sequentially connected between the sixth end D6 of the third edge B21 and the eighth end D8 of the fourth edge B22.

That is, in some embodiments, the at least one first connecting edge B13 and the at least two second connecting edges B23 may be both two and both linear.

In some embodiments, as shown in fig. 1, the two first connecting sides B13 are parallel to the first side B11 and the second side B12, respectively, and the two second connecting sides B23 are parallel to the third side B21 and the fourth side B22, respectively. Thus, since the first side B11 and the second side B12 are both straight and substantially vertically connected, the third side B21 and the fourth side B22 are both straight and substantially vertically connected, and the lengths of the first side B11 and the second side B12 are substantially equal to each other, λ/4, and thus, the two first connecting sides B13 are also substantially vertically connected, and the lengths are equal to each other and λ/4. At this time, the cavity antenna T1 is formed as a square-shaped cavity antenna projected in a direction from the conductive plate 11 to the ground plate 12. At this time, compared with the traditional rectangular cavity antenna, the volume can be effectively reduced, and the volume of the antenna is almost half of that of the traditional rectangular cavity antenna, and can be reduced by half.

Obviously, in other embodiments, the two first connecting sides B13 may not be parallel to the first side B11 and the second side B12, and the two second connecting sides B23 may not be parallel to the third side B21 and the fourth side B22, so long as the projection of the at least one first connecting side B13 of the conductive plate 11 on the ground plate 12 is ensured to be substantially coincident with the at least one second connecting side B23.

In this application, since the conductive wall 13 is connected between the at least one first connection edge B13 and the at least one second connection edge B23, the shape of the projection of the conductive wall 13 on the conductive plate 11 or the projection of the conductive wall on the ground plate 12 is the same as the shape of the at least one first connection edge B13 or the shape of the at least one second connection edge B23. Therefore, when the at least one first connecting edge B13 and the at least two second connecting edges B23 are both straight, the conductive wall 13 includes two planes that are connected to each other.

Referring to fig. 2, an electric field distribution of the reference antenna assembly 1' is shown. Wherein, the reference antenna assembly 1' is used for supporting the reception of electromagnetic wave signals of at least a certain frequency band. As shown in fig. 2, the reference antenna assembly 1 'includes an open side surface S1', and as shown in fig. 2, since there is only one open side surface S1', the dimension between the open side surface S1' and the conductive wall/shorting wall 13 'grounded around is theoretically required to be λ'/4 to meet the boundary condition requirement of the minimum length required by electromagnetic oscillation, and therefore, the length of the open side surface S1 'of the reference antenna assembly 1' is required to be 2×λ '/4=λ'/2 to meet the boundary condition requirement of the minimum length required by electromagnetic oscillation. Wherein, λ 'is a wavelength corresponding to a certain frequency band supported by the reference antenna assembly 1'.

As shown in fig. 2, the voltage of the conductive plate 11 'of the reference antenna assembly 1' at the middle position of the opening side surface S1 'is maximum Vmax, while the ground plate 12' is grounded, the voltage is 0, which corresponds to the minimum voltage point Vmin, so that the voltage difference between the conductive plate 11 'of the reference antenna assembly 1' and the ground plate 12 'at the middle position of the opening side surface S1' is Vmax-Vmin, and the voltage difference is Vmax due to the fact that Vmin is 0, which is two opposite positions with the maximum voltage difference between the conductive plate 11 'and the ground plate 12', and is the maximum electric field point.

Please refer to fig. 3, which is a schematic diagram illustrating an electric field distribution of the antenna assembly 1 according to some embodiments of the present application. Fig. 3 shows the electric field distribution of the antenna assembly 1 shown in fig. 1 as an example.

In some embodiments, the two frequency bands supported by the antenna assembly 1 in the present application include a first frequency band and a second frequency band, the first frequency band is lower than the second frequency band, and the lengths of the first edge B11 and the second edge B12 are equal to λ ₁ 4, wherein the lambda ₁ Is the wavelength corresponding to the electromagnetic wave signal of the first frequency band. That is, in some embodiments, the dimensions of the first side B11 and the second side B12 of the conductive plate 11 formed by the antenna assembly 1 of the present application preferably meet the fundamental mode resonance requirement of the first frequency band with a lower frequency, and then the impedance matching adjustment of the matching unit 15 is performed, so that the impedance matching of the second frequency band is better, the radiation efficiency of the second frequency band is also higher, and at least the reception of the electromagnetic wave signal of the first frequency band and the reception of the electromagnetic wave signal of the second frequency band with a higher frequency can be simultaneously supported. In fig. 3, the electric field distribution of the antenna assembly 1 when operating in the first frequency band is mainly illustrated, and the matching unit 15 and the like are omitted.

In this application, the first frequency band being lower than the second frequency band may mean that the center frequency of the first frequency band is lower than the center frequency of the second frequency band, and the frequency ranges corresponding to the first frequency band and the second frequency band may be partially overlapped or not overlapped. For example, the first frequency band being lower than the second frequency band may include: the maximum value of the frequency range corresponding to the first frequency band is smaller than the maximum value of the frequency range corresponding to the second frequency band, and the minimum value of the frequency range corresponding to the first frequency band is smaller than the minimum value of the frequency range corresponding to the second frequency band; or, the maximum value of the frequency range corresponding to the first frequency band is smaller than the minimum value of the frequency range corresponding to the second frequency band, and so on.

As shown in fig. 3, the antenna assembly 1 of the present application has two open sides S1 and S2, the maximum electric field point is the intersection point N1 of the first side B11 and the second side B12, that is, the first end D1 of the first side B11 and the third end D3 of the second side B12, and the lengths of the first side B11 and the second side B12 are equal to λ/λ ₁ Thus, the distance from the maximum electric field point of the cavity antenna T1 to the grounded conductive wall 13 is still satisfied ₁ And/4, satisfying the boundary condition of minimum size required for electromagnetic oscillation, while making the length of the side located at the side of the opening only required to be lambda ₁ And/4, the overall size can be effectively reduced. For example, if the reference antenna assembly 1 'is used to support the first frequency band as shown in fig. 2, the length of the side of the reference antenna assembly 1' located at the opening side needs λ ₁ The antenna assembly 1 according to the present application can thus be reduced in volume by approximately half relative to the reference antenna assembly 1', while effectively reducing space occupation. Wherein reference numerals for parts of the elements in fig. 3 are omitted for clarity of illustration.

As shown in fig. 3, the voltage at the intersection point N1 of the first side B11 and the second side B12 of the conductive plate 11 is the maximum, that is, vmax shown in fig. 3, and the intersection point N2 of the third side B21 and the fourth side B22 of the ground plate 12 corresponds to the intersection point N1, and since the ground plate 12 is grounded, the voltage at each position of the ground plate 12 is 0, which corresponds to the minimum voltage Vmin, and therefore, the differential pressure between the intersection point N1 of the first side B11 and the second side B12 of the conductive plate 11 and the intersection point N2 of the third side B21 and the fourth side B22 of the ground plate 12 is Vmax-Vmin, and since Vmin is 0, the differential pressure is Vmax, which is two opposite positions having the maximum voltage difference between the conductive plate 11 and the ground plate 12, which is the maximum electric field maximum point.

Thus, as described above, the conventional cavity antenna is one-sided open, i.e., only one open side, and the maximum electric field point is located at the middle point of the long side of the open side, and in order to meet the boundary condition of minimum electromagnetic oscillation, the long side of the open side needs 1/2 of the wavelength λ ' corresponding to the supported frequency band, so that the distance between the maximum electric field point and the grounded conductive walls on both sides is λ '/4, and therefore, the long side of the cavity antenna T1 in the prior art, i.e., the long side located on the open side, needs at least λ '/2 in size. However, in the cavity antenna T1 of the present application, since there are two open sides S1 and S2, the maximum point of the electric field is the intersection point of the first side B11 and the second side B12, and the lengths of the first side B11 and the second side B12 are equal to 1/4 of the wavelength corresponding to the corresponding supported frequency band, such as λ ₁ 4, whereby the distance between the maximum electric field point of the cavity antenna T1 and the grounded conductive wall 13 still satisfies lambda ₁ 4, satisfying the boundary condition of minimum size required by electromagnetic oscillation when operating in the first frequency band, and making the length of the side located at the side of the opening only be lambda ₁ And/4, the overall size can be effectively reduced, and the occupied space can be effectively reduced. As described above, the matching means 15 can support at least the reception of the electromagnetic wave signal in the first frequency band and the reception of the electromagnetic wave signal in the second frequency band having a higher frequency at the same time.

Referring to fig. 4, another simple structure of the antenna assembly 1 according to some embodiments of the present application is shown. As shown in fig. 4, the at least one first connecting edge B13 includes a first connecting edge B13, where the first connecting edge B13 is in any shape such as an arc shape, a straight line shape, or an irregular shape, and is connected between the second end D2 of the first edge B11 and the fourth end D4 of the second edge B12; the at least one second connecting edge B23 includes a second connecting edge B23, where the second connecting edge B23 is in any shape such as an arc shape, a straight line shape, or an irregular shape, and is connected between the sixth end D6 of the third edge B21 and the eighth end D8 of the fourth edge B22.

That is, in some embodiments, the number of the at least one first connecting side B13 and the at least one second connecting side B23 may be only one.

In fig. 4, the at least one first connecting edge B13 and the at least one second connecting edge B23 are both arc-shaped. And the curvature center of the first connecting side B13 faces to the sides of the first side B11 and the second side B12, and the curvature center of the second connecting side B23 faces to the sides of the third side B21 and the fourth side B22. Thus, as shown in fig. 4, the cavity antenna T1 formed by the conductive plate 11, the ground plate 12 and the conductive wall 13 of the antenna assembly 1 is substantially fan-shaped, and the conductive wall 13 is substantially arc-shaped.

Thus, by providing the at least one first connection side B13 and the at least one second connection side B23 as one arc structure, respectively, the overall size of the cavity antenna T1 can be further reduced.

Referring to fig. 5, another simple structure of the antenna assembly 1 according to some embodiments of the present application is shown. As shown in fig. 5, the at least one first connecting edge B13 and the at least one second connecting edge B23 are both linear. Thus, as shown in fig. 5, the cavity antenna T1 formed by the conductive plate 11, the ground plate 12 and the conductive wall 13 of the antenna assembly 1 is substantially triangular, and the conductive wall 13 is planar. Compared with the structure shown in fig. 1, by setting the at least one first connecting edge B13 and the at least one second connecting edge B23 to be one straight connecting edge, the size of the cavity antenna T1 can be further reduced by nearly half, which is more advantageous for reducing the overall size of the cavity antenna T1.

Obviously, as mentioned above, in some embodiments, the at least one first connecting edge B13 includes one first connecting edge B13, and the one first connecting edge B13 may also have any shape such as an irregular shape; the at least one second connecting edge B23 includes a second connecting edge B23, and the second connecting edge B23 may be any shape such as an irregular shape.

Referring to fig. 6, another simple structure of the antenna assembly 1 according to some embodiments of the present application is shown. As shown in fig. 6, the at least one first connecting edge B13 includes at least three first connecting edges B13, where the at least three first connecting edges B13 are linear and are sequentially connected between the second end D2 of the first edge B11 and the fourth end D4 of the second edge B12, and two adjacent first connecting edges B13 are connected with each other by an included angle; the at least one second connecting edge B23 includes at least three second connecting edges B23, where the at least three second connecting edges B23 are linear and are sequentially connected between the sixth end D6 of the third edge B21 and the eighth end D8 of the fourth edge B22, and two adjacent second connecting edges B23 are connected with each other by an included angle. The conductive wall 13 comprises at least three planes which meet.

Wherein, the included angle θ between any two adjacent first connecting edges B13 is greater than 90 °, and the included angle between any two adjacent second connecting edges B23 is also greater than 90 °.

In some embodiments, as shown in fig. 6, the connection vertex of any two adjacent first connection edges B13 is further away from the first edge B11 and the second edge B12 than the two adjacent first connection edges B13, and the connection vertex of any two adjacent second connection edges B23 is further away from the third edge B21 and the fourth edge B22 than the two adjacent second connection edges B23, so that the at least three first connection edges B13 are integrally protruded away from the first edge B11 and the second edge B12, and the at least three second connection edges B23 are integrally protruded away from the third edge B21 and the fourth edge B22.

Thus, by providing the at least one first connection side B13 and the at least one second connection side B23 respectively as a structure including at least three connection sides, the overall size of the cavity antenna T1 can also be reduced.

It is obvious that in some embodiments, when the at least one first connecting edge B13 comprises two or more first connecting edges B13, at least part of the first connecting edges B13 may have different shapes, for example, a part of the first connecting edges B13 are arc-shaped and a part of the first connecting edges B13 are linear. Similarly, when the at least one second connecting edge B23 includes two or more second connecting edges B23, at least part of the second connecting edges B23 may have different shapes, for example, a part of the second connecting edge B23 may be arc-shaped and a part of the second connecting edge B23 may be straight, so long as it is ensured that the projection of each first connecting edge B13 of the conductive plate 11 on the ground plate 12 substantially coincides with the corresponding second connecting edge B23.

The view angles of fig. 4 to 6 are different from those of fig. 1 and 3, and in the view angles of fig. 4 to 6, the two opening sides S1 and S2 are both facing inward.

Please refer to fig. 7, which is a schematic diagram illustrating a configuration of the matching unit 15 according to some embodiments of the present application. As shown in fig. 7, the matching unit 15 includes a first matching branch 151, a second matching branch 152, and a third matching branch 153. The first matching branch 151 and the second matching branch 152 are sequentially coupled between the feed 14 and the conductive plate 11, the third matching branch 153 is coupled between the connection node N0 of the first matching branch 151 and the second matching branch 152 and the ground plate 12, and each of the first matching branch 151, the second matching branch 152 and the third matching branch 153 includes at least one matching element M1.

That is, in some embodiments, the matching unit 15 is coupled between the conductive plate 11, the ground plate 12 and the feed source 14, and the matching unit 15 includes three matching branches, i.e., a first matching branch 151, a second matching branch 152 and a third matching branch 153, which are in a structure similar to a T shape, and each matching branch includes at least one matching element M1, so as to enable corresponding impedance matching adjustment, so that the cavity antenna T1 can support at least two frequency bands, i.e., reception of electromagnetic wave signals of the first frequency band and the second frequency band.

In some embodiments, as previously described, the first and second sides B11, B12 of the conductive plate 11 of the antenna assembly 1 of the present applicationThe length being equal to 1/4 of the wavelength corresponding to the corresponding supported lower frequency band, e.g. 1/4 of the wavelength corresponding to the first frequency band, i.e. lambda ₁ 4, whereby the distance between the maximum electric field point of the cavity antenna T1 and the grounded conductive wall 13 still satisfies lambda ₁ And/4, satisfying the boundary condition of minimum size required by electromagnetic oscillation when operating in the first frequency band, and supporting at least the reception of electromagnetic wave signals in the first frequency band. As described above, the matching means 15 can support at least the reception of the electromagnetic wave signal in the first frequency band and the reception of the electromagnetic wave signal in the second frequency band having a higher frequency at the same time.

In some embodiments, the matching unit 15 performs impedance matching adjustment so that impedance matching can substantially meet the impedance matching requirements of the first frequency band and the second frequency band at the same time, and can enable the antenna radiation efficiency in both the first frequency band and the second frequency band to meet the requirements, so as to effectively expand the bandwidth and cover the first frequency band and the second frequency band.

Since the grounding plate 12 in the present application is grounded, the connection of the matching unit 15 to the grounding plate 12 includes a direct connection to the grounding plate 12, or the connection of the matching unit 15 to other grounding structures corresponds to a connection to the grounding plate 12. Similarly, the third matching branch 153 is coupled between the connection node N0 of the first matching branch 151 and the second matching branch 152 and the ground plate 12, and the third matching branch 153 is directly connected between the connection node N0 of the first matching branch 151 and the second matching branch 152 and the ground plate 12, or the third matching branch 153 is connected between the connection node N0 of the first matching branch 151 and the second matching branch 152 and other ground structures.

The matching unit 15 shown in fig. 7 is only an example, and the matching unit 15 may have other structures. For example, in some embodiments, the matching unit 15 may also include four matching branches, for example, two of the matching branches are connected to the ground plate 12 at the same time to form a "pi" structure. Alternatively, in some embodiments, the matching unit 15 may include only two matching branches, for example, only two matching branches, where the two matching branches are sequentially coupled between the feed 14 and the conductive board 11, and a connection node of the two matching branches is directly connected to the ground board 12.

The structure of the matching unit 15, and the matching parameter values of the matching elements included in each matching branch of the matching unit 15 may be determined according to a predetermined test, for example, when the test determines that the antenna radiation efficiency of the antenna assembly 1 operating in the first frequency band and the second frequency band is high, the structure of the matching unit 15 and the matching element M1 have the matching parameter values.

In some embodiments, the matching element M1 may be a capacitance or an inductance, and the at least one matching element M1 may include a capacitance and/or an inductance.

Referring to fig. 8, a further schematic structure of the matching unit 15 in some embodiments of the present application is shown. In some embodiments, as shown in fig. 8, the first matching branch 151 includes a first inductance L1, the second matching branch 152 includes a second inductance L2 and a first capacitance C1 connected in series, and the third matching branch 153 includes a third inductance L3 and a second capacitance C2 connected in series.

That is, in some embodiments, the at least one matching element M1 included in the first matching branch 151 may be the first inductance L1, the at least one matching element M1 included in the second matching branch 152 may be the second inductance L2 and the first capacitance C1 connected in series, and the at least one matching element M1 included in the third matching branch 153 may be the third inductance L3 and the second capacitance C2 connected in series.

In some embodiments, the inductance value of the first inductor L1 is 8.2nH (nano henry), the inductance value of the second inductor L2 is 22nH, the capacitance value of the first capacitor C1 is 0.5pF, the inductance value of the third inductor L3 is 13nH, and the capacitance value of the second capacitor C2 is 6.1pF.

Thus, in some embodiments, the first matching branch 151 includes a first inductor L1, the second matching branch 152 includes a second inductor L2 and a first capacitor C1 that are connected in series, the third matching branch 153 includes a third inductor L3 and a second capacitor C2 that are connected in series, the inductance value of the first inductor L1 is 8.2nH, the inductance value of the second inductor L2 is 22nH, the capacitance value of the first capacitor C1 is 0.5pF, the inductance value of the third inductor L3 is 13nH, and the capacitance value of the second capacitor C2 is 6.1pF, so that the matching unit 15 can achieve better impedance matching for both the first frequency band and the second frequency band, and the radiation efficiency of the cavity antenna T1 when operating in the first frequency band and the second frequency band is higher, so as to meet the communication requirement, and at least support the reception of electromagnetic wave signals in the first frequency band and the second frequency band.

It is obvious that fig. 8 is also merely an example, and as mentioned above, the structure of the matching unit 15 and the matching element M1 having the matching parameter values may be a structure and matching parameter values satisfying that the antenna radiation efficiency of the antenna assembly 1 operating in both the first frequency band and the second frequency band is high. For example, the first matching branch 151 may include two inductors connected in parallel, the second matching branch 152 may include an inductor and a capacitor connected in parallel, the third matching branch 153 may include only one inductor, and so on.

In some embodiments, as shown in fig. 1, the conductive plate 11 includes a feeding point F1, and the matching unit 15 is directly connected between the feeding point F1 of the conductive plate 11, the ground plate 12, and the feed 14.

That is, in some embodiments, the conductive plate 11 includes a feeding point F1, and the foregoing matching unit 15 is coupled between the feeding point F1 of the conductive plate 11, the ground plate 12, and the feed 14, and the matching unit 15 may be directly connected between the feeding point F1 of the conductive plate 11, the ground plate 12, and the feed 14. That is, in some embodiments, the feed 14 is directly connected to the feed point F1 of the conductive plate 11 through the matching unit 15, and the conductive plate 11 is excited after impedance matching adjustment by the matching unit 15, so as to excite the cavity antenna T1 to support at least reception of electromagnetic wave signals in the first frequency band and the second frequency band.

Wherein in some embodiments, the feeding point F1 may be disposed at any position of the conductive plate 11. For example, the feeding point F1 may be disposed at a position of the first side B11 between the first end D1 and the second end D2, or at a position close to the first side B11 and where a projection on the first side B11 is located between the first end D1 and the second end D2. Alternatively, the feeding point F1 may be disposed at a position of the second side B12 between the third end D3 and the fourth end D4, or at a position close to the second side B12 and where a projection on the second side B12 is located between the third end D3 and the fourth end D4. In some embodiments, the feeding point F1 may be disposed at a position near the middle of the conductive plate 11. In some embodiments, the vertical distance between the feeding point F1 and the conductive wall 13 along the extending direction of the first side B11 or the second side B12 may be 1/3, 1/2, or 2/3 of the length of the first side B11 or the second side B12. In fig. 1, the feeding point F1 is illustrated as being disposed near the first side B11 and a projection on the first side B11 being located between the first end D1 and the second end D2.

Wherein, since the first side B11 and the second side B12 are free ends as a whole, and the at least one first connection side B13 is grounded by connecting the conductive wall 13 with the ground plate 12, which is equivalent to a ground end, the conductive plate 11 is connected with the feed 14 through the feed point F1 to form a structure similar to an inverted-F antenna (IFA, inverted F antenna), thereby being capable of operating in the first frequency band and the second frequency band under the excitation of the feed 14 and the impedance matching adjustment of the matching unit 15. Further, since the lengths of the first side B11 and the second side B12 are equal to lambda ₁ 4, so that the cavity antenna T1 can oscillate in the first frequency band as a whole, and at least support the reception of electromagnetic wave signals in the first frequency band under the excitation of the feed 14, and the working mode of the second frequency band can be effectively excited after the impedance matching adjustment of the matching unit 15, the radiation efficiency is higher, and the cavity antenna T1 can also oscillate in the second frequency band at the same time, and the excitation of the feed 14 reachesThe reception of electromagnetic wave signals of the second frequency band is rarely supported.

In some embodiments, the first frequency band and the second frequency band are closer frequency bands, for example, the ratio of the center frequency of the second frequency band to the center frequency of the first frequency band is smaller than a preset value, for example, smaller than 1.5, so that the lengths of the first side B11 and the second side B12 are equal to lambda ₁ And/4, that is, equal to 1/4 of the wavelength corresponding to the first frequency band, the resonance requirement of the second frequency band can be met to a certain extent, and after the impedance matching adjustment of the matching unit 15, the impedance matching of the second frequency band can be better realized, so that the radiation efficiency of the second frequency band is higher, the working frequency of the second frequency band can be effectively excited, the cavity antenna T1 can also oscillate in the second frequency band at the same time, and at least the reception of electromagnetic wave signals of the second frequency band is supported under the excitation of the feed source 14.

Fig. 9 is a schematic diagram of current distribution of the antenna assembly 1 in the first frequency band according to some embodiments of the present application. Fig. 9 is a schematic diagram of current distribution in a first frequency band, which is obtained by taking the antenna assembly 1 shown in any one of the embodiments of fig. 1, fig. 4 to fig. 6 as an example for simulation test.

Fig. 9 illustrates a current distribution diagram (a 1) and a current distribution diagram (a 2), wherein the current distribution diagram (a 1) illustrates an overall current distribution diagram on the conductive plate 11 when the antenna assembly 1 operates in the first frequency band, and the current distribution diagram (a 2) illustrates current distribution diagrams on the first side B11 and the second side B12 when the antenna assembly 1 operates in the first frequency band. As can be seen from the current distribution diagram (a 1) in fig. 9, since the lengths of the first side B11 and the second side B12 of the conductive plate 11 are equal to λ, respectively ₁ I.e. 1/4 of the wavelength of the first frequency band, so that when the conductive plate 11 is operating in the first frequency band, the conductive plate 11 has substantially no current zero, mainly due to the fact that the current zero is located at two end positions of the first side B11 and the second side B12It appears that there is no current zero point, and as also seen from the current distribution diagram (a 2) in fig. 9, the first side B11 and the second side B12 of the conductive plate 11 are both substantially the current large-point region Q1, and therefore, the oscillating electromagnetic wave energy in the first frequency band is high.

Fig. 10 is a schematic diagram illustrating a current distribution of the antenna assembly 1 according to some embodiments of the present application operating in the second frequency band. Fig. 10 may also be a schematic diagram of current distribution in the second frequency band, which is obtained by taking the antenna assembly 1 shown in any of the embodiments of fig. 1, 4-6 as an example for performing a simulation test.

In fig. 10, a current distribution diagram (B1) and a current distribution diagram (B2) are illustrated, where the current distribution diagram (B1) is an overall current distribution diagram on the conductive plate 11 when the antenna assembly 1 operates in the second frequency band, and the current distribution diagram (B2) is an overall current distribution diagram on the first side B11 and the second side B12 when the antenna assembly 1 operates in the second frequency band. As can be seen from the current distribution diagram (B1) in fig. 10, since the lengths of the first side B11 and the second side B12 of the conductive plate 11 are equal to λ, respectively ₁ And/4, namely 1/4 of the wavelength of the first frequency band, so that the wavelength is larger than 1/4 of the wavelength corresponding to the second frequency band with higher frequency. While the current zero represents the trough position of the electromagnetic wave, so that when the conductive plate 11 works in the second frequency band, the current zero area Q2 appears on the conductive plate 11, and as seen from the current distribution diagram (B2) in fig. 10, in the current large-point area Q1 of the first side B11 and the second side B12 of the conductive plate 11, there is one current zero area Q2, because the second frequency band is higher than the first frequency band, the wavelength is shorter, and thus, the size of the cavity antenna T1, that is, the size on the first side B11 and the second side B12 is greater than one quarter of the wavelength of the second frequency band, so that the corresponding electromagnetic wave of the second low frequency band will be more than one quarter of the wavelength on the first side B11 and the second side B12, and the current zero area Q2 appears more easily and obviously. This is also expected in line with current mode theory.

In some embodiments, the ratio of the center frequency of the second frequency band to the center frequency of the first frequency band is smaller than a predetermined value, for example, smaller than 1.5, so that, when the antenna assembly 1 operates at the second frequency, at most one current zero position occurs on both the first side B11 and the second side B12, and thus the effect on the oscillating electromagnetic wave energy is not substantial. Therefore, after the impedance matching adjustment is performed by the matching unit 15, the working mode of the second frequency band can be effectively excited, and the radiation efficiency can also meet the requirement.

Referring to fig. 11, another simple structure of the antenna assembly 1 according to some embodiments of the present application is shown. In some embodiments, the antenna assembly 1 further includes a feed coupling branch 16, the feed coupling branch 16 is spaced from and parallel to the first side B11 and/or the second side B12 of the conductive plate 11 and coupled to the conductive plate 11, the matching unit 15 is connected between the feed coupling branch 16, the ground plate 12 and the feed source 14, the matching unit 15 is coupled to the conductive plate 11 through the feed coupling branch 16, the feed source 14 is coupled to excite the cavity antenna T1 through the matching unit 15 and the feed coupling branch 16, and the cavity antenna T1 supports at least two frequency bands of electromagnetic wave signal reception under the coupling excitation of the feed source 14 and under the impedance matching adjustment of the matching unit 15.

That is, in some embodiments, the foregoing matching unit 15 is coupled between the feeding point F1 of the conductive plate 11, the ground plate 12 and the feed source 14, and the matching unit 15 may be connected between the feeding coupling branch 16, the ground plate 12 and the feed source 14, and then the matching unit 15 is coupled with the conductive plate 11 through the feeding coupling branch 16. Thus, in some embodiments, the feed 14 is coupled to excite the cavity antenna T1 through the matching unit 15 and the feed coupling stub 16.

Thus, in some embodiments, the cavity antenna T1 can also be effectively excited by means of coupling excitation to support at least two frequency bands of electromagnetic wave signals.

The feed source 14 is specifically configured to provide a feed signal, where the feed signal provided by the feed source 14 is coupled to the cavity of the cavity antenna T1 through the matching unit 15 and the feed coupling branch 16, and periodically oscillating electromagnetic wave signals, that is, electromagnetic wave signals of a first frequency band and a second frequency band that form periodic oscillation, are formed in the cavity, so as to support at least reception of the electromagnetic wave signals of the first frequency band and the second frequency band.

In some embodiments, when the matching unit 15 is directly connected between the feeding point F1 of the conductive plate 11, the ground plate 12 and the feed source 14, the feeding signal provided by the feed source 14 is directly fed to the feeding point F1 of the conductive plate 11 through the matching unit 15, and also periodically oscillating electromagnetic wave signals, that is, electromagnetic wave signals of a first frequency band and a second frequency band, are formed in the cavity of the cavity antenna T1, so as to support at least the reception of the electromagnetic wave signals of the first frequency band and the second frequency band.

In some embodiments, the feed coupling stub 16 is in a straight bar shape, spaced from and parallel to the first side B11 or the second side B12 of the conductive plate 11, and coupled to the conductive plate 11.

That is, in some embodiments, the feed coupling stub 16 may be spaced from and parallel to any one of the first and second sides B11, B12 of the conductive plate 11 to be coupled with the conductive plate 11. In fig. 9, the feed coupling stub 16 is illustrated as being adjacent to the first side B11 of the conductive plate 11, spaced apart from and parallel to the first side B11 of the conductive plate 11, and coupled to the conductive plate 11.

Thus, in some embodiments, the feed coupling stub 16 may be spaced from and parallel to one edge of the conductive plate 11 on the open side, such that the feed 14 may be effectively coupled to excite the cavity antenna T1 through the matching unit 15 and the feed coupling stub 16.

Wherein, in some embodiments, the projection area of the feed coupling branch 16 on the first side B11 or the second side B12 of the conductive plate 11 is smaller than the size of the first side B11 or the second side B12, and may be located at any suitable position on the first side B11 or the second side B12, that is, the feed coupling branch 16 may be opposite to any suitable position on the first side B11 or the second side B12. The projection area of the feed coupling branch 16 on the first side B11 or the second side B12 of the conductive plate 11, that is, the area where the first side B11 or the second side B12 of the conductive plate 11 faces the feed coupling branch 16, is equivalent to a feed area, that is, the equivalent feed area may be located at any suitable position on the first side B11 or the second side B12.

The structure of the antenna assembly 1 shown in fig. 11 is different from the foregoing embodiment in that the conductive plate 11 is fed by coupling, the cavity antenna T1 is excited by coupling excitation, and other more specific structures can be referred to in the foregoing embodiment.

Referring to fig. 12, a schematic diagram of still another simple structure of the antenna assembly 1 according to some embodiments of the present application is shown. As shown in fig. 12, in some embodiments, the feed coupling stub 16 may be bent, and the feed coupling stub 16 includes a first feed coupling stub 161 and a second feed coupling stub 162, and the first feed coupling stub 161 is spaced apart from and parallel to the first side B11 of the conductive plate 11, and the second feed coupling stub 162 is spaced apart from and parallel to the second side B12 of the conductive plate 11.

That is, in some embodiments, the feed coupling stub 16 may be spaced from and parallel to the first and second sides B11, B12 of the conductive plate 11 at the same time, so as to effectively increase the coupling area with the conductive plate 11, so as to effectively increase the coupling energy, and effectively improve the radiation performance of the cavity antenna T1 under the coupling excitation of the feed 14.

In some embodiments, as shown in fig. 12, when the feed coupling branch 16 is bent and includes a first feed coupling branch 161 and a second feed coupling branch 162, the feed coupling branch 16 may be disposed at a junction of the first side B11 and the second side B12 of the conductive plate 11, and the junction of the first feed coupling branch 161 and the second feed coupling branch 162 of the feed coupling branch 16 may be close to the junction of the first side B11 and the second side B12 of the conductive plate 11.

Wherein in some embodiments, the distance of the feed coupling branch 16 from the first side B11 and/or the second side B12 may be any distance required to satisfy the coupling between the feed coupling branch 16 and the conductive plate 11.

Wherein the matching unit 15 may be connected to any suitable location of the feed coupling stub 16, e.g. may be connected to an end, an intermediate location, etc. of the feed coupling stub 16.

The structure of the antenna assembly 1 shown in fig. 11 and fig. 12 is different from the foregoing embodiment in that the conductive plate 11 is fed by coupling, the cavity antenna T1 is excited by coupling excitation, and other more specific structures can be seen in the related content of the foregoing embodiment. In fig. 11 and 12, the reference numerals are omitted from fig. 1 for the sake of clarity.

In some embodiments, the first frequency band and the second frequency band are two of the navigation communication frequency bands. The navigation communication frequency band can be a GPS navigation frequency band, a Beidou navigation frequency band, a Galileo navigation frequency band, a George navigation frequency band and the like.

For example, the first frequency band may be the GPS L5 frequency band (resonant frequency of approximately 1176 MHz), and the second frequency band may be the GPS L1 frequency band (resonant frequency of 1575 MHz); alternatively, the first frequency band may be a BDS B2 frequency band (the beidou B2 frequency band, the resonance frequency is about 1207 MHz), and the second frequency band may be a BDS B1 frequency band (the beidou B1 frequency band, the resonance frequency is about 1561 MHz); alternatively, the first frequency band may be the GAL E5b frequency band (galileo E5b frequency band, resonance frequency about 1207 MHz), the second frequency band may be the GAL E5b frequency band (galileo E1 frequency band, resonance frequency about 1575 MHz), and so on.

It is apparent that in some embodiments, the first frequency band and the second frequency band may be any other two frequency bands, for example, two frequency bands in a middle-high frequency band or two frequency bands in a low frequency band in a cellular communication network, and so on. Alternatively, in some embodiments, different frequency bands in the WiFi frequency band may be used, for example, the WiFi 2.4G frequency band and the WiFi 5G frequency band may be used respectively.

In this application, the receiving of the electromagnetic wave signals supporting at least the first frequency band and the second frequency band may include: besides supporting the reception of the electromagnetic wave signals of the first frequency band and the second frequency band, the transmission of the electromagnetic wave signals of the first frequency band and the second frequency band can be supported, or the reception of other frequency bands can be supported, or the reception and the transmission of other frequency bands can be supported.

Wherein in some embodiments, when the first frequency band and the second frequency band may be two frequency bands in a cellular communication network or two frequency bands in a WiFi frequency band, that is, when the first frequency band and the second frequency band are not two frequency bands in a navigation communication frequency band, the cavity antenna T1 is configured to support reception and transmission of electromagnetic wave signals of at least the two frequency bands of the first frequency band and the second frequency band under excitation of the feed 14 and under impedance matching adjustment of the matching unit 15. That is, when the first frequency band and the second frequency band are not two frequency bands in the navigation communication frequency band, the cavity antenna T1 supports not only reception of electromagnetic wave signals of the two frequency bands, but also transmission of the two frequency bands under excitation of the feed source 14 and impedance matching adjustment of the matching unit 15.

In some embodiments, the cavity antenna T1 is configured to support the transceiving of electromagnetic wave signals in a third frequency band under the excitation of the feed source 14 and the impedance matching adjustment of the matching unit 15. For example, when the first frequency band and the second frequency band are two frequency bands in the navigation communication frequency band, the third frequency band may be a frequency band in the cellular communication network or a frequency band in a non-navigation communication frequency band such as a WiFi frequency band.

Therefore, in the application, by forming the cavity antenna T1, radiation can be performed through the opening side surface, and good antenna radiation performance can be realized only by having a certain clearance near the opening side surface, so that the requirement on the clearance area is small, and the antenna can be applied to an environment with a small clearance areaIs a kind of medium. In addition, the cavity antenna T1 of the present application has two open sides S1 and S2, the maximum electric field point is the intersection point of the first side B11 and the second side B12, and the lengths of the first side B11 and the second side B12 are equal to λ ₁ 4, so that the distance from the maximum electric field point of the cavity antenna T1 to the grounded conductive wall 13 is still satisfied by lambda ₁ And/4, satisfying the boundary condition of the minimum size required for electromagnetic oscillation of the first frequency band, while making the length of the side located at the opening side only required to be lambda ₁ And/4, the overall size can be effectively reduced, and the occupied space can be effectively reduced.

In addition, in the present application, when the first frequency band and the second frequency band are two frequency bands in the navigation communication frequency band, the antenna assembly 1 supports dual frequencies in the navigation communication frequency band, for example, supports dual-frequency GPS, and thus, by receiving signals in two or more different frequency bands, the atmospheric error and the multipath interference effect can be effectively corrected, so as to improve the accuracy and reliability of navigation positioning.

In some embodiments, the distance between the conductive plate 11 and the ground plate 12, that is, the height of the cavity antenna T1, may be any suitable distance, as long as the efficiency and bandwidth of the cavity antenna T1 operating in the first frequency band and the second frequency band are satisfied. In some embodiments, the distance between the conductive plate 11 and the ground plate 12 may be around 3mm (millimeters).

Referring to fig. 13, a simplified schematic diagram of an internal structure of a portion of an electronic device 100 according to some embodiments of the present application is shown. The electronic device 100 may comprise an antenna assembly 1 according to any of the previous embodiments.

A simple example of the antenna assembly 1 being located in the electronic device 100 is illustrated in fig. 13. As shown in fig. 13, the electronic device 100 includes two adjacent side frames 2, and the two opening sides S1 and S2 are respectively adjacent to and spaced from the two adjacent side frames 2.

As described above, the conductive plate 11, the ground plate 12, and the conductive wall 13 of the antenna assembly 1 form the cavity antenna T1 having the two opening sides S1 and S2, and in general, the opening sides S1 and S2 of the cavity antenna T1 are radiation windows for electromagnetic wave signals, so that the two opening sides S1 and S2 are respectively adjacent to and spaced apart from the two adjacent side frames 2, and at least the reception of electromagnetic wave signals can be performed by utilizing the clearance area near the side frames 2 of the electronic device 100, thereby ensuring the antenna performance.

In some embodiments, the two open sides S1, S2 are parallel to the two adjacent side frames 2, respectively.

As previously mentioned, in some embodiments, the first side B11 and the second side B12 are both straight and vertically connected, the third side B21 and the fourth side B22 are both straight and vertically connected, and since the first side B11 and the third side B21 are two opposite sides of one of the opening sides S1, the second side B12 and the fourth side B22 are two opposite sides of the other opening side S2, so that the opening side S1 is actually a side defined by the first side B11 and the third side B21, the opening side S2 is a side defined by the second side B12 and the fourth side B22, and since the first side B11 and the second side B12 are both straight and vertically connected, the third side B21 and the fourth side B22 are both straight and vertically connected, so that the two opening sides S1, S2 are also vertically connected. The two adjacent side frames 2 of the electronic device 100 are also generally in a vertical relationship, so that by placing the two opening sides S1, S2 parallel to the two adjacent side frames 2, respectively, it is possible to advantageously save the space occupied by the antenna assembly 1 in the electronic device 100.

The antenna assembly 1 included in the electronic device 100 shown in fig. 13 is illustrated by taking the structure of the antenna assembly 1 shown in fig. 1 as an example, and parts of elements, such as the feed 14 and the matching unit 15, are omitted.

Referring to fig. 14, a schematic diagram of return loss of the antenna assembly 1 included in the electronic device 100 according to some embodiments of the present application is shown. Fig. 14 may be a schematic diagram of a return loss curve obtained by performing a simulation test using the antenna assembly 1 included in the electronic device 100 as the antenna assembly 1 shown in any one of the embodiments of fig. 1, fig. 4-fig. 6, and fig. 11-fig. 12.

Fig. 14 illustrates a return loss curve S11-1, and is exemplified by taking the first frequency band as the GPS L5 frequency band and the second frequency band as the GPS L1 frequency band. Obviously, as mentioned above, the first frequency band and the second frequency band may be frequency bands in other navigation communication frequency bands, or may be other frequency bands in a cellular communication network.

The lower the input return loss, the lower the loss at the resonance frequency is, which means the higher the antenna efficiency.

As shown in fig. 14, the return loss at the resonance frequency of 1.176GHz in the first frequency band (GPS L5 frequency band) is about-11.29 dB, and the return loss at the resonance frequency of 1.575GHz in the second frequency band (GPS L5 frequency band) is about-12.46 dB. It can be seen that the return loss is low when the antenna assembly 1 included in the electronic device 100 operates in both the first frequency band and the second frequency band.

Referring to fig. 15, a schematic diagram of a radiation efficiency and a total system efficiency curve of an antenna assembly 1 included in the electronic device 100 according to some embodiments of the present application is shown. Fig. 15 may also be a schematic diagram of radiation efficiency and overall system efficiency curves obtained by taking the antenna assembly 1 included in the electronic device 100 as an example and performing simulation test on the antenna assembly 1 shown in any one of the embodiments of fig. 1, fig. 4-fig. 6 and fig. 11-fig. 12.

Fig. 15 illustrates a radiation efficiency curve Sr1 and a total system efficiency curve St1, and is also exemplified by the first frequency band being a GPS L5 frequency band and the second frequency band being a GPS L1 frequency band.

The peak value of the total efficiency curve of the system in the same frequency band generally corresponds to the trough value of the corresponding input echo curve. As shown in fig. 15, the radiation efficiency at the resonance frequency of 1.176GHz in the first frequency band (GPS L5 frequency band) is about-4.6 dB, the total system efficiency is about-4.6 dB, and the radiation efficiency and the total system efficiency are both high, so that good antenna efficiency can be achieved. In addition, at the resonance frequency of 1.575GHz of the second frequency band (GPS L5 frequency band), the radiation efficiency is about-3.71 dB, the total system efficiency is about-3.71 dB, and the radiation efficiency and the total system efficiency are both high.

Thus, it can be seen that the antenna assembly 1 of the electronic device 100 of the present application can achieve better antenna performance in both the first frequency band and the second frequency band.

Fig. 16 is an antenna pattern of the antenna assembly 1 of the electronic device 100 according to some embodiments of the present application when the antenna assembly is operated in the first frequency band. In fig. 16, the simulation test may also be performed by taking the antenna assembly 1 included in the electronic device 100 as an example of the antenna assembly 1 shown in any one of the embodiments in fig. 1, fig. 4-fig. 6, and fig. 11-fig. 12, where the antenna assembly 1 works in the antenna pattern of the first frequency band that is the GPS L5 frequency band.

As shown in fig. 16, the electronic device 100 further includes a display screen 3, and the plane on which the display screen 3 of the electronic device 100 is located is an XOY plane, and a direction perpendicular to the display screen 3 and pointing to one side of the display screen 3 is a positive Z-axis direction. In which, the direction from light to dark in the antenna pattern is the main radiation direction, that is, the beam direction, as can be seen from fig. 16, the main radiation direction of the antenna assembly 1 when operating in the first frequency band is biased toward the upper hemisphere, that is, toward the positive Z-axis direction, that is, toward the vertical display 3 and toward one side of the display 3. Therefore, the beam direction R1, i.e., the main radiation direction, is always biased toward the upper hemisphere, i.e., toward the positive Z-axis, regardless of whether the user holds the electronic device 100 square or at an angle, or regardless of whether the electronic device 100 is in a landscape or portrait state. Therefore, when the first frequency band is a navigation communication frequency band, for example, a GPS L1 frequency band, the first frequency band is favorable for pointing upwards, and points to a navigation communication satellite positioned above, so that the antenna performance of the navigation communication frequency band is favorable for improving.

Fig. 17 is an antenna pattern of the antenna assembly 1 of the electronic device 100 according to some embodiments of the present application when the antenna assembly is operated in the second frequency band. In fig. 17, simulation tests may also be performed by taking the antenna assembly 1 included in the electronic device 100 as an example of the antenna assembly 1 shown in any one of the embodiments in fig. 1, fig. 4-fig. 6, and fig. 11-fig. 12, where the antenna assembly 1 works in the antenna pattern of the second frequency band that is the GPS L1 frequency band.

In some embodiments, the two side frames 2 adjacent to the two opening sides S1, S2 may be the side frame 2 located on the top and the side frame 2 located on the right in the view shown in fig. 17, respectively.

As shown in fig. 17, the plane on which the display screen 3 of the electronic device 100 is located is an XOY plane, and the direction perpendicular to the display screen 3 and pointing to the display screen 3 is the positive Z-axis direction. As can be seen from fig. 17, the beam direction R1, i.e. the main radiation direction, of the antenna assembly 1 when operating in the second frequency band is biased towards the upper hemisphere, i.e. towards the positive Z-axis. Therefore, the beam direction R1, i.e., the main radiation direction, is always biased toward the upper hemisphere, i.e., toward the positive Z-axis, regardless of whether the user holds the electronic device 100 square or at an angle, or regardless of whether the electronic device 100 is in a landscape or portrait state. Therefore, when the second frequency band is a navigation communication frequency band, such as a GPS L1 frequency band, the second frequency band is beneficial to pointing upwards, and points to the navigation communication satellite located above, so that the antenna performance of the navigation communication frequency band is beneficial to improving.

Referring to fig. 18, a schematic diagram of a portion of an internal structure of the electronic device 100 according to some embodiments of the present application, which is shown from a display screen side. As shown in fig. 18, the electronic device 100 further includes a display 3, where a gap is formed between the display 3 and the side frame 2 to form a black area H1, and projections of the two opening sides S1 and S2 on a plane on which the display 3 is located are located in the black area H1.

The black edge area H1 between the display screen 3 and the side frame 2 is generally filled with an insulating material such as glue for edge sealing, so that the black edge area H1 can be used as a clearance area. By making the projections of the two opening sides S1, S2 on the plane of the display screen 3 be located in the black area H1, the electromagnetic wave signals radiated by the opening sides S1, S2 of the cavity antenna T1 can be conducted to the outside of the electronic device 100 through the black area H1, so that normal transmission of the electromagnetic wave signals can be performed, and the antenna performance is ensured.

In some embodiments, since the electromagnetic wave signals radiated from the opening sides S1 and S2 of the cavity antenna T1 are conducted to the outside of the electronic device 100 through the black edge region H1, the side frame 2 of the electronic device 100 is not required to be conducted through the side frame 2, and the side frame 2 of the electronic device 100 may be integrally made of a metal material, so as to improve the overall appearance effect of the electronic device 100.

In some embodiments, the projection of the two open sides S1, S2 on the plane of the display 3 coincides with the boundary line between the black border area H1 and the edge of the display 3.

The two open side surfaces S1 and S2 are substantially perpendicular to the plane of the display screen 3, the projection of the open side surface S1 on the plane of the display screen 3 is actually a line of the projection of the first side B11 and the third side B21 on the plane of the display screen 3, and the projection of the open side surface S2 on the plane of the display screen 3 is actually a line of the projection of the second side B12 and the fourth side B22 on the plane of the display screen 3. By making the projection of the two opening sides S1, S2 on the plane on which the display screen 3 is located coincide with the boundary line between the black edge region H1 and the edge of the display screen 3, the black edge region H1 can be maximized and utilized by the cavity antenna T1, and the space region of the black edge region H1 can be maximized and utilized, that is, the electromagnetic wave signal radiated from the opening sides S1, S2 of the cavity antenna T1 can be almost conducted to the outside of the electronic device 100 through the whole black edge region H1, so that the antenna performance can be effectively ensured.

Obviously, in some embodiments, the portions of the two adjacent side frames 2 of the electronic device 100 facing the two open sides S1 and S2 of the cavity antenna T1 may also be partially hollowed out, for example, by being provided with a slit, the electromagnetic wave signals radiated by the open sides S1 and S2 of the cavity antenna T1 may be conducted to the outside of the electronic device 100 through the side frames 2, so that the clearance area is further improved, and the antenna radiation performance is further improved.

As shown in fig. 18, the electronic device 100 may be square, and includes two opposite long sides and two opposite short sides, where fig. 18 illustrates that the antenna assembly 1 may be disposed substantially at an upper right corner of the view shown in fig. 18.

Referring to fig. 19, a schematic side view of a schematic part of an electronic device 100 according to some embodiments of the present application is shown. In this case, fig. 19 may be a schematic side view of the electronic device 100 from the long side.

As shown in fig. 19, the electronic device 100 includes a motherboard 4, the motherboard 4 includes a ground layer 41, and the ground plate 12 of the antenna assembly 1 may be grounded for electrical connection with the ground layer 41 of the motherboard 4, or the ground plate 12 may be at least a partial region in the ground layer 41.

That is, in some embodiments, the ground layer 41 of the motherboard 4 of the electronic device 100 may provide a ground potential, the ground plate 12 of the antenna assembly 1 may be electrically connected to the ground layer 41 of the motherboard 4 to ground, or the ground plate 12 of the antenna assembly 1 may be directly a partial region of the ground layer 41 of the motherboard 4.

The predetermined area of the ground layer 41 of the motherboard 4 may be exposed toward the side where the display screen 3 is located, for example, the predetermined area of the ground layer 41 may be exposed by removing the predetermined area of the other layer of the motherboard 4 located on the side of the ground layer 41 near the display screen 3.

When the ground plate 12 of the antenna assembly 1 may be electrically connected to the ground layer 41 of the motherboard 4 to be grounded, the ground plate 12 of the antenna assembly 1/the cavity antenna T1 may be carried on a predetermined area of the ground layer 41 exposed toward the side of the display screen 3 and electrically connected to the ground layer 41 to be grounded. While, when the ground plate 12 may be at least a partial area of the ground layer 41, at least one first connection edge B13 of the antenna assembly 1 may be connected to a corresponding position of a predetermined area of the ground layer 41 through a conductive wall 13, so that the conductive plate 11, the predetermined area of the ground layer 41, and the conductive wall 13 may form a cavity antenna T1 having two open sides.

The feed source 14 may be disposed on the main board 4 and connected to the feed point F1 through a corresponding feed connector, where the feed connector may be a conductive spring sheet, a conductive wire, an FPC (flexible circuit board), or the like.

In some embodiments, when the ground plate 12 may be at least a partial area in the ground layer 41, the space occupied by the cavity antenna T1 in the thickness of the electronic device 100 can be effectively reduced, so that the space of the electronic device 100 can be effectively saved, and the utilization rate of the space in the thickness of the electronic device 100 can be improved.

Referring to fig. 20, another side view of a schematic part of the structure of the electronic device 100 in some embodiments of the present application is shown. Fig. 20 may be a schematic side view of the electronic device 100 from the long side. As shown in fig. 20, the electronic device 100 further includes a middle frame 5, and the ground plate 12 of the antenna assembly 1 is electrically connected to the middle frame 5 and grounded, or the ground plate 12 is at least a partial area in the middle frame 5.

Generally, the center 5 is used to carry the display 3 and to provide the ground potential of the whole machine. The ground plate 12 of the antenna assembly 1 may be electrically connected to the middle frame 5 to be grounded, or the ground plate 12 of the antenna assembly 1 may be directly a partial area of the middle frame 5.

The middle frame 5 may include a first surface 51 and a second surface 52 opposite to each other, where the first surface of the middle frame 5 faces the display 3 and is used to carry the display 3, and the second surface of the middle frame 5 may be used to carry the motherboard 4 and other structures. The preset area of the middle frame 5 may be thinned or recessed away from the display screen 3, so that the cavity antenna T1 may be accommodated therein.

When the ground plate 12 of the antenna assembly 1 may be electrically connected to the middle frame 5 for grounding, the ground plate 12 of the cavity antenna T1 may be carried on a predetermined area of the middle frame 5 and electrically connected to the middle frame 5 for grounding. While, when the ground plate 12 may be at least a partial area of the middle frame 5, at least one first connection edge B13 of the antenna assembly 1 may be connected to a corresponding position of a predetermined area of the middle frame 5 through a conductive wall 13, so that the conductive plate 11, the predetermined area of the middle frame 5, and the conductive wall 13 may form a cavity antenna T1 having two open sides.

As shown in fig. 20, since the middle frame 5 is disposed between the motherboard 4 and the display screen 3, when the ground plate 12 of the antenna assembly 1 is electrically connected to the ground layer 41 of the motherboard 4 and grounded, or the ground plate 12 is at least a partial area of the ground layer 41, a portion of the middle frame 5 corresponding to a preset area of the ground layer 41 of the motherboard 4 may be hollowed out to allow the cavity antenna T1 to pass through.

Referring to fig. 21, a simplified schematic diagram of another schematic part of the internal structure of the electronic device 100 according to some embodiments of the present application is shown. As shown in fig. 21, in some embodiments, the antenna assembly 1 included in the electronic device 100 may also be the aforementioned antenna assembly 1 shown in fig. 4, that is, the at least one first connection edge B13 and the at least one second connection edge B23 are both one and arc-shaped, and the cavity antenna T1 formed by the conductive plate 11, the ground plate 12 and the conductive wall 13 of the antenna assembly 1 is substantially fan-shaped.

Similarly, the two opening sides S1 and S2 of the cavity antenna T1 are respectively adjacent to and spaced from the two adjacent side frames 2, and the conductive wall 13 is close to the inside of the electronic device 100, so that more avoiding spaces can be formed due to the fact that the conductive wall 13 is approximately a cambered surface, and other functional devices of the electronic device 100 can be conveniently placed.

Referring to fig. 22, a simplified schematic diagram of another schematic part of the internal structure of the electronic device 100 according to some embodiments of the present application is shown. As shown in fig. 22, in some embodiments, the antenna assembly 1 included in the electronic device 100 may also be the antenna assembly 1 shown in fig. 6, that is, the at least one first connection edge B13 includes at least three first connection edges B13, where the at least three first connection edges B13 are linear and are sequentially connected between the second end D2 of the first edge B11 and the fourth end D4 of the second edge B12, and two adjacent first connection edges B13 are connected at an included angle; the at least one second connecting edge B23 includes at least three second connecting edges B23, and the at least three second connecting edges B23 are linear and sequentially connected between the sixth end D6 of the third edge B21 and the eighth end D8 of the fourth edge B22.

At this time, the cavity antenna T1 may also have a fan-like structure, and the conductive wall 13 may include at least three connected planes, and may also form a non-smooth arc surface, so that more avoidance spaces may be formed, thereby facilitating placement of other functional devices of the electronic apparatus 100.

Referring to fig. 23, a simplified schematic diagram illustrating a portion of an internal structure according to still another embodiment of the present application is shown. As shown in fig. 23, and also shown in fig. 11 and the like, the electronic device 100 includes a plurality of sets of two adjacent side frames 2, the antenna assemblies 1 may include a plurality of sets, each antenna assembly 1 is disposed at a set of two adjacent side frames 2, and two opening sides S1 and S2 of each antenna assembly 1 are respectively disposed adjacent to and spaced from the two adjacent side frames 2 of the corresponding set.

That is, in some embodiments, the electronic device 100 may include a plurality of antenna assemblies 1 of any of the previous embodiments. Therefore, a plurality of antenna assemblies 1 with small requirements on the clearance area in the application can be arranged, and the contradiction that the number of the currently required antennas is large and the current clearance area is small can be relieved to a great extent.

As shown in fig. 23, the number of the groups of two adjacent side frames 2 in the electronic device 100 is four, and the number of the antenna assemblies 1 may include at most 4, which can greatly meet the requirement of the current electronic device 100 on antennas.

In fig. 23, two antenna assemblies 1 are illustrated as an example. Obviously, the number of antenna assemblies 1 may also be 3 or 4, etc.

In some embodiments, when the electronic device 100 includes the antenna assembly 1 in any of the foregoing embodiments, at least some of the electromagnetic wave signals supported by the antenna assembly 1 have different frequency bands. For example, one of the antenna assemblies 1 supports reception of electromagnetic wave signals of two of the navigation communication bands, the other antenna assembly 1 supports transmission and reception of electromagnetic wave signals of two of the medium-high frequencies, and so on.

In some embodiments, when the electronic device 100 includes a plurality of antenna assemblies 1 in any of the foregoing embodiments, at least some of the antenna assemblies 1 have different structures, for example, one antenna assembly 1 has a structure shown in fig. 1, another antenna assembly 1 has a structure shown in fig. 4, and so on. The structure of the antenna assembly 1 more conforming to the component layout requirement of the area where the antenna assembly 1 is disposed can be determined according to the layout requirement of the components of the area where the antenna assembly 1 is disposed, and the antenna assembly 1 having a corresponding structure is disposed in the area.

In some embodiments, as shown in fig. 13 and fig. 21-23, the electronic device 100 is a non-foldable electronic device, and the two adjacent side frames 2 are any two adjacent side frames 2 of the electronic device 100.

That is, in some embodiments, the electronic device 100 is a non-foldable electronic device, and the two adjacent side frames 2 of the antenna assembly 1 that are disposed close together may be any two adjacent side frames 2 of the electronic device 100. The antenna assembly 1 may be positioned adjacent any two adjacent side frames 2 as desired.

When the electronic device 100 is a non-foldable electronic device, the electronic device 100 may be a tablet mobile phone, a tablet computer, or the like.

Please refer to fig. 24, which is a simplified overall schematic diagram of the electronic device 100 according to some embodiments of the present application. In some embodiments, as shown in fig. 24, the electronic device 100 is a foldable electronic device, and the foldable electronic device includes a first body 110 and a second body 120, at least one of the first body 110 and the second body 120 is provided with a display screen 3, and the two adjacent side frames 2 are any two adjacent side frames 2 on the first body 110 and/or the second body 120 provided with the display screen 3.

That is, in some embodiments, the electronic device 100 may be a folder type electronic device, in which a display screen 3 is disposed on at least one of the first body 110 and the second body 120 of the electronic device 100, and the adjacent two side frames 2 are any two adjacent side frames 2 on the first body 110 and/or the second body 120 on which the display screen 3 is disposed, so that a black side region H1 can be formed as a headroom region of the antenna assembly 1 by a gap with the display screen 3. Accordingly, as described above, the two opening side surfaces S1 and S2 of the antenna assembly 1 are respectively adjacent to and spaced from the two adjacent side frames 2, so that the electromagnetic wave signals radiated from the opening side surfaces S1 and S2 of the antenna assembly 1/the cavity antenna T1 can be conducted to the outside of the electronic device 100 through the black edge region H1, and normal transmission of the electromagnetic wave signals can be performed, thereby ensuring the antenna performance.

When the electronic device 100 is a folder-type electronic device, the electronic device 100 may be a notebook computer, a folder-type mobile phone, or the like.

In some embodiments, as shown in fig. 24, the electronic device 100 is a notebook computer, the display screen 3 is disposed on the first body 110, and the keyboard 6 is disposed on the second body 120. Therefore, the two adjacent side frames 2 are any two adjacent side frames 2 on the first body 110, as shown in fig. 24, the antenna assembly 1 may be disposed in the first body 110, and may include at least one of the two adjacent side frames 2 in the corresponding group.

When the electronic device 100 is a notebook computer, the preset frequency band supported by the antenna assembly 1 may be a WIFI frequency band, a bluetooth frequency band, or the like, so as to facilitate WIFI and/or bluetooth communication.

As shown in fig. 24, the second body 120 is further provided with a touch pad 61 for a user to perform touch input.

Please refer to fig. 25, which is a simplified schematic plan view of the electronic device 100 according to some embodiments of the present application. As shown in fig. 25, the electronic device 100 is a foldable electronic device, and the display screen 3 is disposed on each of the first body 110 and the second body 120.

At this time, the electronic device 100 may be a folder-type mobile phone or the like. The two adjacent side frames 2 are any two adjacent side frames 2 on the first body 110 and the second body 120, and the antenna assembly 1 may be disposed in the first body 110 and/or the second body 120, and may include at least one of the two adjacent side frames 2 in the corresponding group.

Thus, to all be provided with the foldable electronic device of display screen 3 on first body 110 and the second body 120, can set up the antenna assembly 1 of this application in more positions, can greatly satisfy the demand of current antenna quantity under little headroom environment.

As shown in fig. 25, the electronic device 100 may be a folding mobile phone or the like, and the electronic device 100 further includes a rotating member 130, where the first body 110 and the second body 120 are rotatably connected through the rotating member 130. The rotating member 130 may be any structure such as a rotating shaft or a hinge, which can rotatably connect the first body 110 and the second body 120.

Obviously, when the electronic device 100 is a notebook computer, the display 3 is disposed on the first body 110, and the keyboard 6 is disposed on the second body 120, the first body 110 and the second body 120 are also rotatably connected by corresponding rotating members, which is not illustrated in fig. 14.

In some embodiments, when the electronic device 100 is a foldable electronic device in which the display screen 3 is disposed on each of the first body 110 and the second body 120, and the antenna assembly 1 includes a plurality of antenna assemblies, the frequency bands supported by the two antenna assemblies 1 disposed at the corresponding positions of the first body 110 and the second body 120 are different, so that when the electronic device 100 is in a folded state, interference between the two antenna assemblies can be effectively avoided. The corresponding positions of the first body 110 and the second body 120 may refer to positions where projections overlap when the electronic device 100, which is a foldable electronic device, is in a folded state.

The electronic device 100 in the present application may be any electronic device with an antenna, such as a mobile phone, a tablet computer, a notebook computer, and the like.

The antenna assembly and the electronic device 100 can radiate through the opening side by forming the cavity antenna T1, and can achieve good antenna radiation performance only by having a certain clearance near the opening side, so that the requirement on a clearance area is small, and the antenna assembly and the electronic device can be applied to an environment with a small clearance area. In addition, in the present application, the matching unit 15 coupled between the conductive plate 11, the ground plate 12 and the feed source 14 is used to implement impedance matching adjustment, so that the cavity antenna T1 supports at least two frequency bands of electromagnetic wave signal reception, and can meet the current multi-band requirement, and also can effectively improve the overall communication performance. In addition, the cavity antenna T1 of the present application has two open sides S1 and S2, the maximum electric field point is the intersection point of the first side B11 and the second side B12, and the lengths of the first side B11 and the second side B12 are equal to λ ₁ 4, so that the distance from the maximum electric field point of the cavity antenna T1 to the grounded conductive wall 13 is still satisfied by lambda ₁ And/4, satisfying the boundary condition of the minimum size required for electromagnetic oscillation of the first frequency band, while making the length of the side located at the opening side only required to be lambda ₁ And/4, the overall size can be effectively reduced, and the occupied space can be effectively reduced.

Wherein each embodiment or each of the embodiments has an emphasis, and the details of each embodiment are not described in detail in some embodiments, reference may be made to the relevant content of the other embodiments.

The foregoing description is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and should be covered in the scope of the present application; embodiments of the present application and features of embodiments may be combined with each other without conflict. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An antenna assembly, the antenna assembly comprising:

a conductive plate including a first edge, a second edge, and at least one first connection edge connected between the first edge and the second edge, wherein the first edge is connected with the second edge;

The grounding plate is parallel to the conductive plate and is arranged at intervals, the grounding plate comprises a third side, a fourth side and at least one second connecting side connected between the third side and the fourth side, the third side is connected with the fourth side, and the grounding plate is grounded;

a conductive wall connected between the at least one first connection edge and the at least one second connection edge for connecting the at least one first connection edge of the conductive plate to ground;

a feed source;

the matching unit is coupled among the conducting plate, the grounding plate and the feed source and is used for realizing impedance matching adjustment;

the first side and the third side are opposite and are arranged at intervals, the second side and the fourth side are opposite and are arranged at intervals, the conducting plate, the grounding plate and the conducting wall form a cavity antenna with two opening side surfaces, the first side and the third side are two opposite sides of one opening side surface, and the second side and the fourth side are two opposite sides of the other opening side surface; the cavity antenna is used for supporting the reception of electromagnetic wave signals of at least two frequency bands under the excitation of the feed source and the impedance matching adjustment of the matching unit.

2. The antenna assembly of claim 1, wherein the first side includes opposing first and second ends, the second side includes opposing third and fourth ends, the first end of the first side and the third end of the second side are connected, and the at least one first connection side is connected between the second end of the first side and the fourth end of the second side; the third side comprises a fifth end and a sixth end which are opposite, the fourth side comprises a seventh end and an eighth end which are opposite, the fifth end of the third side is connected with the seventh end of the fourth side, and the at least one second connecting side is connected between the sixth end of the third side and the eighth end of the fourth side.

3. The antenna assembly of claim 2, wherein the projections of the first edge, the second edge, and the at least one first connection edge of the conductive plate onto the ground plane coincide with the third edge, the fourth edge, and the at least one second connection edge, respectively.

4. The antenna assembly of claim 3, wherein the first and second sides are each linear and vertically connected, and the third and fourth sides are each linear and vertically connected; the number of the at least one first connecting edge is at least one, each first connecting edge is in a straight line shape, an arc shape or an irregular shape, the number of the at least one second connecting edge is at least one, and each second connecting edge is in a straight line shape, an arc shape or an irregular shape.

5. The antenna assembly of claim 1, wherein the two frequency bands include a first frequency band and a second frequency band, the first frequency band being lower than the second frequency band, the first side and the second side each having a length equal to λ ₁ 4, wherein the lambda ₁ Is the wavelength corresponding to the electromagnetic wave signal of the first frequency band.

6. The antenna assembly of claim 1, wherein the matching unit comprises a first matching branch, a second matching branch, and a third matching branch; the first matching branch circuit and the second matching branch circuit are sequentially coupled between the feed source and the conducting plate, the third matching branch circuit is coupled between the connecting nodes of the first matching branch circuit and the second matching branch circuit and the grounding plate, and the first matching branch circuit, the second matching branch circuit and the third matching branch circuit comprise an inductor and/or a capacitor.

7. The antenna assembly of claim 6, wherein the first matching branch comprises a first inductance, the second matching branch comprises a second inductance and a first capacitance connected in series, and the third matching branch comprises a third inductance and a second capacitance connected in series.

8. The antenna assembly of claim 7, wherein the first inductor has an inductance of 8.2nH, the second inductor has an inductance of 22nH, the first capacitor has a capacitance of 0.5pF, the third inductor has an inductance of 13nH, and the second capacitor has a capacitance of 6.1pF.

9. The antenna assembly of claim 5, wherein the first frequency band and the second frequency band are two of a navigational communication frequency band.

10. The antenna assembly of any one of claims 1-9, wherein the conductive plate includes a feed point, and the matching element is directly connected between the feed point of the conductive plate, the ground plate, and the feed.

11. The antenna assembly according to any of claims 1-9, further comprising a feed coupling stub spaced from and parallel to the first side and/or the second side of the conductive plate, the matching unit being connected between the feed coupling stub, the ground plate and the feed, the matching unit being coupled to the conductive plate by the feed coupling stub, the feed coupling exciting the cavity antenna by the matching unit and the feed coupling stub, the cavity antenna supporting reception of electromagnetic wave signals of at least two frequency bands under coupled excitation of the feed and under impedance matching adjustment of the matching unit.

12. The antenna assembly of claim 11, wherein the feed coupling stub is in the shape of a straight bar spaced from and parallel to the first or second side of the conductive plate to couple with the conductive plate.

13. The antenna assembly of claim 11, wherein the feed coupling stub is a meander shape comprising a first feed coupling stub spaced from and parallel to a first edge of the conductive plate and a second feed coupling stub spaced from and parallel to a second edge of the conductive plate.

14. An electronic device comprising an antenna assembly according to any of claims 1-13.

15. The electronic device of claim 14, wherein the electronic device comprises two adjacent side frames, the two open sides being respectively adjacent to and spaced apart from the two adjacent side frames.

16. The electronic device of claim 15, wherein the two open sides are parallel to the two adjacent side frames, respectively.

17. The electronic device of claim 15, further comprising a display screen having a gap between the display screen and the side frame to form a black border region, wherein projections of the two open sides onto a plane of the display screen are located in the black border region.

18. The electronic device of claim 15, wherein the electronic device comprises a motherboard, the motherboard comprising a ground plane, the ground plane being electrically connected to the ground plane of the motherboard to ground, or the ground plane being at least a partial region of the ground plane; alternatively, the electronic device includes a middle frame, and the grounding plate is electrically connected with the middle frame and grounded, or the grounding plate is at least a partial area in the middle frame.

19. The electronic device of any of claims 15-18, wherein the electronic device is a non-folding electronic device and the two adjacent side frames are any two adjacent side frames of the electronic device.

20. The electronic device of any one of claims 15-18, wherein the electronic device is a foldable electronic device, the foldable electronic device includes a first body and a second body, at least one of the first body and the second body is provided with a display screen, and the two adjacent side frames are any two adjacent side frames on the first body and/or the second body provided with the display screen.