Antenna unit, array antenna and communication equipment

Abstract

The embodiment of the utility model relates to the technical field of wireless communication, in particular to an antenna unit, an array antenna and communication equipment, the antenna unit comprises a dielectric layer, a grounding layer, a radiation unit and a feed assembly, and the dielectric layer is provided with a first surface and a second surface; the grounding layer is arranged on the first surface; the radiation unit comprises a first radiation sheet and a second radiation sheet, the first radiation sheet and the second radiation sheet are arranged on the second surface at an interval, the first radiation sheet and the second radiation sheet are respectively conducted with the grounding layer, the first radiation sheet is provided with a first groove, and the second radiation sheet is provided with a second groove; the feed assembly comprises a first feed line and a second feed line, the first feed line is arranged on the second surface, one end of the first feed line is connected to the bottom of the first groove, the other end of the first feed line is connected to the bottom of the second groove, the second feed line is arranged in the dielectric layer, and one end of the second feed line is conducted with the first feed line. According to the embodiment of the utility model, the size of the antenna unit can be reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of wireless communication, and in particular to an antenna unit, an array antenna and a communication device. Background Art

[0002] UWB (Ultra Wide Band) technology is a wireless standard based on IEEE (Institute of Electrical and Electronics Engineers) 802.15.4z, which aims to provide precise positioning and secure communication. Compared with wireless technologies such as Bluetooth and NFC (Near Field Communication), UWB has advantages in positioning accuracy, positioning coverage, and security. With the development of science and technology, UWB technology has been gradually applied to mobile terminal devices such as smartphones to enhance perception capabilities. For example, when airdropping, the distance of the delivery device will be identified, and the closer the device, the higher the priority. Existing mobile terminal devices mainly implement UWB technology by setting UWB antennas inside them.

[0003] However, in the process of realizing the present invention, the inventors found that the internal space of mobile terminal devices currently on the market is relatively small, so that the area available for UWB antennas is often relatively small, and most of the existing UWB antennas have the problem of being large in size. Utility Model Content

[0004] In view of the above problems, the embodiments of the present invention provide an antenna unit, an array antenna and a communication device, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of an embodiment of the utility model, an antenna unit is provided, including a dielectric layer, a ground layer, a radiating unit and a feeding assembly, wherein the dielectric layer is provided with a first surface and a second surface; the ground layer is provided on the first surface; the radiating unit includes a first radiating plate and a second radiating plate, the first radiating plate and the second radiating plate are arranged on the second surface at intervals, the first radiating plate and the second radiating plate are respectively connected to the ground layer, the first radiating plate is provided with a first groove, and the second radiating plate is provided with a second groove; the feeding assembly includes a first feed line and a second feed line, the first feed line is arranged on the second surface, one end of the first feed line is connected to the bottom of the first groove, the other end of the first feed line is connected to the bottom of the second groove, the second feed line is arranged in the dielectric layer, and one end of the second feed line is connected to the first feed line.

[0006] In some embodiments, the first groove is located on a side of the first radiation plate close to the second radiation plate, and / or the second groove is located on a side of the second radiation plate close to the first radiation plate.

[0007] In some embodiments, along the direction from the radiation unit to the ground layer, the second feed line is located in the gap between the first radiation plate and the second radiation plate.

[0008] In some embodiments, the first radiation plate is symmetrical with respect to the first feed line, and / or the second radiation plate is symmetrical with respect to the first feed line.

[0009] In some embodiments, the first feed line is perpendicular to the second feed line.

[0010] In some embodiments, the antenna unit also includes a conductive component, the conductive component includes a first conductive member, a second conductive member and a third conductive member, the dielectric layer is provided with a first through hole, a second through hole and a third through hole, one end of the first conductive member is connected to the first radiation plate, the other end of the first conductive member is connected to the ground layer after passing through the first through hole, one end of the second conductive member is connected to the second radiation plate, the other end of the second conductive member is connected to the ground layer after passing through the second through hole, one end of the third conductive member is connected to the first feed line, and the other end of the third conductive member is connected to one end of the second feed line after passing through the third through hole.

[0011] In some embodiments, the first conductive member is a conductive wire or a metal layer, and / or the second conductive member is a conductive wire or a metal layer, and / or the third conductive member is a conductive wire or a metal layer.

[0012] In some embodiments, the first conductive member is located on a side of the first radiation plate close to the second radiation plate, and / or the second conductive member is located on a side of the second radiation plate close to the first radiation plate.

[0013] According to one aspect of the embodiments of the present utility model, an array antenna is provided, comprising the above antenna unit.

[0014] According to one aspect of the embodiments of the utility model, a communication device is provided, including the above-mentioned array antenna.

[0015] The beneficial effects of the embodiment of the utility model are as follows: Different from the prior art, the embodiment of the utility model provides an antenna unit, including a dielectric layer, a ground layer, a radiation unit and a feeding assembly, wherein the dielectric layer is provided with a first surface and a second surface; the ground layer is provided on the first surface; the radiation unit includes a first radiation sheet and a second radiation sheet, the first radiation sheet and the second radiation sheet are arranged on the second surface at intervals, the first radiation sheet and the second radiation sheet are respectively connected to the ground layer, the first radiation sheet is provided with a first groove, and the second radiation sheet is provided with a second groove; the feeding assembly includes a first feeder and a second feeder, the first feeder is provided on the second surface, one end of the first feeder is connected to the bottom of the first groove, the other end of the first feeder is connected to the bottom of the second groove, the second feeder is provided in the dielectric layer, and one end of the second feeder is connected to the first feeder. In the above manner, the size of the antenna unit can be made more compact, thereby reducing the volume of the antenna unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0017] Figure 1 is a three-dimensional diagram of an antenna unit provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the antenna unit provided by the embodiment of the utility model after the dielectric layer is removed;

[0019] Figure 3 It is a top view of the antenna unit provided by the embodiment of the utility model after the dielectric layer is removed;

[0020] Figure 4 It is a schematic structural diagram of the antenna unit provided by an embodiment of the utility model in a front view direction after the dielectric layer is removed.

[0021] The reference numerals in the specific implementation manner are as follows:

[0022] 100. Antenna unit;

[0023] 10. dielectric layer; 10a. first surface; 10b. second surface;

[0024] 20. Ground layer;

[0025] 30. radiating unit; 31. first radiating plate; 31a. first groove; 32. second radiating plate; 32a. second groove;

[0026] 40. Feeding assembly; 41. First feeder; 42. Second feeder;

[0027] 50. Conductive component; 51. First conductive component; 52. Second conductive component; 53. Third conductive component. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in this specification are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0030] With the development of science and technology, UWB technology has gradually been applied to mobile terminal devices such as smartphones to enhance perception capabilities. For example, when transmitting over the air, it will identify the distance of the transmitting device, and the closer the device, the higher the priority. Existing mobile terminal devices mainly implement UWB technology by setting UWB antennas inside them.

[0031] The internal space of existing mobile terminal devices is relatively small, so that the area available for UWB antennas is often relatively small. However, most of the existing UWB antennas have the problem of being relatively large in size.

[0032] The antenna unit of the embodiment of the present application is achieved by arranging the first radiating plate, the second radiating plate and the first feed line on the surface of the dielectric layer, the first radiating plate and the second radiating plate are arranged at intervals, one end of the first feed line is connected to the bottom of the first groove of the first radiating plate, the other end of the first feed line is connected to the bottom of the second groove of the second radiating plate, and the second feed line is arranged in the dielectric layer, so that the size of the antenna unit is more compact.

[0033] In order to facilitate readers to understand the inventive concept of the present application, the specific structure of the antenna is described below:

[0034] See also Figure 1-4The antenna unit 100 includes a dielectric layer 10, a ground layer 20, a radiation unit 30 and a feeding assembly 40, wherein the dielectric layer 10 is provided with a first surface 10a and a second surface 10b which are opposite to each other; the ground layer 20 is provided on the first surface 10a; the radiation unit 30 includes a first radiation plate 31 and a second radiation plate 32, wherein the first radiation plate 31 and the second radiation plate 32 are spaced apart from each other on the second surface 10b, and the first radiation plate 31 and the second radiation plate 32 are respectively connected to the ground layer 20, the first radiation plate 31 is provided with a first groove 31a, and the second radiation plate 32 is provided with a second groove 32a; the feeding assembly 40 includes a first feed line 41 and a second feed line 42, wherein the first feed line 41 is provided on the second surface 10b, one end of the first feed line 41 is connected to the bottom of the first groove 31a, and the other end of the first feed line 41 is connected to the bottom of the second groove 32a, and the second feed line 42 is provided in the dielectric layer 10, and one end of the second feed line 42 is connected to the first feed line 41. In this way, the size of the antenna unit 100 can be made more compact, thereby reducing the volume of the antenna unit 100.

[0035] During use, when the antenna unit 100 needs to transmit an electrical signal to the outside, the power supply or electrical signal is connected from the other end of the second feeder 42 to enter the antenna unit 100, then flows through the first feeder 41, and then flows into the first radiation plate 31 and the second radiation plate 32 from both ends of the first feeder 41, and finally radiates the electrical signal to the external space through the first radiation plate 31 and the second radiation plate 32 respectively; when the antenna unit 100 needs to receive an electrical signal from the external space, the first radiation plate 31 and the second radiation plate 32 can receive the electrical signal from the external space, and then transmit it to the first feeder 41 and the second feeder 42 in turn, and then transmit it to the electronic device through the other end of the second feeder 42. In this application, in the UWB communication system, the first radiation plate 31 mainly covers the CH5 (Channel 1 5) frequency band, and the second radiation plate 32 mainly covers the CH9 (Channel 1 9) frequency band, so that the antenna unit 100 can cover both the CH5 and CH9 frequency bands at the same time. It can be understood that the positions of the first radiation plate 31 and the second radiation plate 32 can be interchanged, and the shape of the second radiation plate 32 of the first radiation plate 31 is not limited and can be adjusted according to needs, for example, it can be rectangular, circular or polygonal. The material of the second radiation plate 32 of the first radiation plate 31 is also not limited and can be adjusted according to needs, for example, it can be metal, alloy, plastic or transparent conductive material.

[0036] In some embodiments, the number of the dielectric layers 10 is two, for example, the dielectric layer 10 includes a first dielectric layer (not shown) and a second dielectric layer (not shown), the second dielectric layer is arranged on the first dielectric layer, the first surface 10a is arranged on the side of the first dielectric layer facing away from the second dielectric layer, the grounding layer 20 is arranged on the first surface 10a, the second surface 10b is arranged on the side of the second dielectric layer facing away from the first dielectric layer, the first radiation plate 31 and the second radiation plate 32 are arranged at intervals on the second surface 10b, the first feed line 41 is arranged on the second surface 10b, and the second feed line 42 is arranged between the first dielectric layer and the second dielectric layer. It can be understood that the number of the dielectric layers 10 can be multiple, and the multiple dielectric layers 10 are stacked in sequence. A first surface 10a is provided on one side of the multiple dielectric layers 10, and a second surface 10b is provided on the other side of the multiple dielectric layers 10. The ground layer 20 is provided on the first surface 10a, and the first radiation plate 31 and the second radiation plate 32 are arranged at intervals on the second surface 10b. The first feed line 41 is provided on the second surface 10b, and the second feed line 42 is provided between the multiple dielectric layers 10.

[0037] In a preferred embodiment, the first groove 31a is located on a side of the first radiation plate 31 close to the second radiation plate 32, and / or the second groove 32a is located on a side of the second radiation plate 32 close to the first radiation plate 31. In this way, the performance of the radiation unit 30 can be improved.

[0038] In a preferred embodiment, along the direction from the radiation unit 30 to the ground layer 20, the second feed line 42 is located in the gap between the first radiation plate 31 and the second radiation plate 32, so that the second feed line 42 can be arranged in different directions in the gap, which is beneficial to wiring.

[0039] In a preferred embodiment, the first radiation plate 31 is symmetrical with respect to the first feed line 41, and / or the second radiation plate 32 is symmetrical with respect to the first feed line 41. In this way, the structural design of the antenna unit 100 is simplified.

[0040] In a preferred embodiment, the first feed line 41 is perpendicular to the second feed line 42 , so as to simplify the structural design of the antenna unit 100 and improve the performance of the antenna unit 100 .

[0041] In some embodiments, the antenna unit 100 also includes a conductive component 50, which includes a first conductive component 51, a second conductive component 52 and a third conductive component 53. The dielectric layer 10 is provided with a first through hole (not shown), a second through hole (not shown) and a third through hole (not shown). One end of the first conductive component 51 is connected to the first radiation plate 31, and the other end of the first conductive component 51 is connected to the ground layer 20 after passing through the first through hole. One end of the second conductive component 52 is connected to the second radiation plate 32, and the other end of the second conductive component 52 is connected to the ground layer 20 after passing through the second through hole. One end of the third conductive component 53 is connected to the first feed line 41, and the other end of the third conductive component 53 is connected to one end of the second feed line 42 after passing through the third through hole.

[0042] In some embodiments, the first conductive member 51 is a wire or a metal layer, and / or the second conductive member 52 is a wire or a metal layer, and / or the third conductive member 53 is a wire or a metal layer. In the present application, the first conductive member 51, the second conductive member 52 and the third conductive member 53 are preferably metal layers, and the material of the metal layer is preferably copper to provide good conductivity.

[0043] In some embodiments, the first conductive member 51 is located on a side of the first radiation plate 31 close to the second radiation plate 32 to reduce the influence of the first conductive member 51 on the performance of the first radiation plate 31; and / or, the second conductive member 52 is located on a side of the second radiation plate 32 close to the first radiation plate 31 to reduce the influence of the second conductive member 52 on the performance of the second radiation plate 32.

[0044] Furthermore, the distance between the first conductive member 51 and the second radiation plate 32 is smaller than the distance between the bottom of the first groove 31a and the second radiation plate 32, so as to improve the performance of the first radiation plate 31; and / or the distance between the second conductive member 52 and the first radiation plate 31 is smaller than the distance between the bottom of the second groove 32a and the first radiation plate 31, so as to improve the performance of the second radiation plate 32.

[0045] In some embodiments, there are multiple first conductive members 51 and the first through hole, and one first conductive member 51 passes through one first through hole to improve the conductivity between the first radiation plate 31 and the first feeder 41; and / or there are multiple second conductive members 52 and the second through hole, and one second conductive member 52 passes through one second through hole to improve the conductivity between the second radiation plate 32 and the second feeder 42. Wherein, when there are multiple first conductive members 51, multiple first conductive members 51 are linearly and uniformly arranged on the side of the first radiation plate 31 close to the second radiation plate 32, and the distance between any one of the first conductive members 51 and the second radiation plate 32 is smaller than the distance between the bottom of the first groove 31a and the second radiation plate 32; when there are multiple second conductive members 52, multiple second conductive members 52 are linearly and uniformly arranged on the side of the second radiation plate 32 close to the first radiation plate 31, and the distance between any one of the second conductive members 52 and the first radiation plate 31 is smaller than the distance between the bottom of the second groove 32a and the first radiation plate 31.

[0046] In a preferred embodiment, when viewing the antenna unit 100 from a side perspective, the shape formed by the conductive component 50, the radiating unit 30 and the feeding component 40 is roughly F-shaped, that is, the antenna unit 100 can form a PI FA antenna (Planar Inverted F-shaped Antenna). Since the radiating unit 30 includes a first radiating plate 31 and a second radiating plate 32, the antenna unit 100 can form two PI FA antennas. The conductive components connected to the ground layer 20 of the two PI FA antennas together with the second feed line 42 constitute a microstrip coplanar waveguide, thereby reducing signal crosstalk between the signal line and the radiating plate.

[0047] In an embodiment of the utility model, the antenna unit 100 includes a dielectric layer 10, a ground layer 20, a radiation unit 30 and a feeding assembly 40, the dielectric layer 10 is provided with a first surface 10a and a second surface 10b; the ground layer 20 is provided on the first surface 10a; the radiation unit 30 includes a first radiation plate 31 and a second radiation plate 32, the first radiation plate 31 and the second radiation plate 32 are arranged at intervals on the second surface 10b, the first radiation plate 31 and the second radiation plate 32 are respectively connected to the ground layer 20, the first radiation plate 31 is provided with a first groove 31a, and the second radiation plate 32 is provided with a second groove 32a; the feeding assembly 40 includes a first feed line 41 and a second feed line 42, the first feed line 41 is provided on the second surface 10b, one end of the first feed line 41 is connected to the bottom of the first groove 31a, and the other end of the first feed line 41 is connected to the bottom of the second groove 32a, the second feed line 42 is provided in the dielectric layer 10, and one end of the second feed line 42 is connected to the first feed line 41. Through the above method, the size of the antenna unit 100 can be made more compact, thereby reducing the volume of the antenna unit 100. In addition, the antenna unit 100 covers both CH5 and CH9 frequency bands and is easy to wire. When multiple antenna units 100 need to be arranged in actual applications, the antenna units 100 have high consistency.

[0048] The present invention further provides an array antenna embodiment, wherein the array antenna comprises the antenna unit 100 described above. The function and structure of the antenna unit 100 may refer to the above embodiment, and will not be described in detail herein.

[0049] The utility model also provides a communication device embodiment, wherein the communication device comprises the above array antenna.

[0050] It should be noted that the preferred embodiments of the utility model are given in the specification and drawings of the utility model, but the utility model can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional restrictions on the content of the utility model. The purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the utility model; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the utility model.

Claims

1. An antenna unit, characterized in that: include: A dielectric layer having a first surface and a second surface; A ground layer, disposed on the first surface; A radiation unit, comprising a first radiation sheet and a second radiation sheet, wherein the first radiation sheet and the second radiation sheet are arranged on the second surface at an interval, the first radiation sheet and the second radiation sheet are respectively connected to the ground layer, the first radiation sheet is provided with a first groove, and the second radiation sheet is provided with a second groove; A feeding assembly includes a first feed line and a second feed line, wherein the first feed line is arranged on the second surface, one end of the first feed line is connected to the bottom of the first groove, the other end of the first feed line is connected to the bottom of the second groove, the second feed line is arranged in the dielectric layer, and one end of the second feed line is connected to the first feed line.

2. The antenna unit according to claim 1, characterized in that The first groove is located on a side of the first radiation plate close to the second radiation plate, and / or the second groove is located on a side of the second radiation plate close to the first radiation plate.

3. The antenna unit according to claim 1, characterized in that Along the direction from the radiation unit to the ground layer, the second feed line is located in the gap between the first radiation plate and the second radiation plate.

4. The antenna unit according to claim 3, characterized in that The first radiation plate is symmetrical with respect to the first feed line, and / or the second radiation plate is symmetrical with respect to the first feed line.

5. The antenna unit according to claim 4, characterized in that The first feed line is perpendicular to the second feed line.

6. The antenna unit according to any one of claims 1 to 5, characterized in that: The antenna unit also includes a conductive component, which includes a first conductive member, a second conductive member and a third conductive member. The dielectric layer is provided with a first through hole, a second through hole and a third through hole. One end of the first conductive member is connected to the first radiation plate, and the other end of the first conductive member is connected to the ground layer after passing through the first through hole. One end of the second conductive member is connected to the second radiation plate, and the other end of the second conductive member is connected to the ground layer after passing through the second through hole. One end of the third conductive member is connected to the first feeder, and the other end of the third conductive member is connected to one end of the second feeder after passing through the third through hole.

7. The antenna unit according to claim 6, characterized in that The first conductive member is a conductive wire or a metal layer, and / or the second conductive member is a conductive wire or a metal layer, and / or the third conductive member is a conductive wire or a metal layer.

8. The antenna unit according to claim 6, characterized in that The first conductive member is located on a side of the first radiation plate close to the second radiation plate, and / or the second conductive member is located on a side of the second radiation plate close to the first radiation plate.

9. An array antenna, characterized in that: The invention comprises the antenna unit as claimed in any one of claims 1 to 8.

10. A communication device, characterized in that: Comprising the array antenna as claimed in claim 9.

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