WO2022007255A1

WO2022007255A1 - Siw antenna system and communication terminal

Info

Publication number: WO2022007255A1
Application number: PCT/CN2020/124384
Authority: WO
Inventors: 陈思; 武景
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-07-10
Filing date: 2020-10-28
Publication date: 2022-01-13
Also published as: CN213026487U

Abstract

The present utility model provides a SIW antenna system, comprising a dielectric substrate, a first conductive layer and a second conductive layer respectively formed on two opposite sides of the dielectric substrate, conductive posts, and a feed probe; the first conductive layer is provided with a through hole; the second conductive layer is provided with a coupling gap; there are multiple conductive posts which are uniformly embedded in the dielectric substrate; the multiple conductive posts are arranged at intervals and together define an enclosure structure; each conductive post is electrically connected to the first conductive layer and the second conductive layer, separately; the first conductive layer, the second conductive layer and the conductive posts together define a SIW cavity; both the through hole and the coupling gap are located within the range enclosed by the conductive posts; the feed probe is located in the range enclosed by the conductive posts; the two ends of the feed probe respectively extend to the coupling gap and the through hole for feeding. Compared with the related art, the SIW antenna system provided by the present utility model has a large bandwidth and a low profile; when the SIW antenna system is applied to a communication terminal, the structure and mechanical properties of the communication terminal are stable, and the overall appearance thereof is beautiful.

Description

SIW antenna system and communication terminal

technical field

The utility model relates to the technical field of communication, in particular to an SIW antenna system and a communication terminal.

Background technique

With the development of mobile communication technology, mobile phones, PADs, notebook computers, etc. have gradually become indispensable electronic products in life, and these electronic products have been updated to electronic communication products with an antenna system added to make them have communication functions. With the development of wireless communication technology, the high-speed data transmission of base stations and mobile terminals puts forward strict requirements on antenna design, which needs to meet the characteristics of broadband, low profile and miniaturization.

technical problem

At present, the 5G millimeter-wave antennas of mobile communication terminals (such as mobile phones) are often designed with patches or other forms of antennas, and are placed on the back or side of the mobile communication terminal. In order to achieve the space coverage performance required by 3GPP, it is necessary to place the side of the mobile communication terminal with the main radiation direction facing the antenna by placing the antenna. However, the existing antenna design of the mobile terminal often needs to break the metal frame on the side, thereby destroying its mechanical properties and overall appearance aesthetics.

Therefore, it is necessary to provide a new SIW antenna system and communication terminal to solve the above problems.

technical solutions

The technical problem to be solved by the utility model is to provide an antenna system with a large bandwidth and a low profile, and when used in a communication terminal, the communication terminal can have stable mechanical properties and good overall appearance.

In order to solve the above technical problems, the present invention provides an SIW antenna system, the SIW antenna system includes an antenna unit, and the antenna unit includes:

a first conductive layer, the first conductive layer is provided with a through hole passing through it;

a second conductive layer, the second conductive layer and the first conductive layer are arranged opposite to and spaced apart, and a coupling gap passing through the second conductive layer is provided on the second conductive layer;

a dielectric substrate, the first conductive layer and the second conductive layer are respectively formed on opposite sides of the dielectric substrate;

Conductive pillars, the conductive pillars are disposed between the first conductive layer and the second conductive layer, the conductive pillars include a plurality of and are embedded in the dielectric substrate, and the conductive pillars are spaced apart Arranged and encircled together in a ring-shaped structure, each of the conductive pillars is electrically connected to the first conductive layer and the second conductive layer respectively, the first conductive layer, the second conductive layer and the The conductive pillars together form an SIW cavity; the through holes are located in the range enclosed by the conductive pillars, and the coupling slot is located in the range enclosed by the conductive pillars; and,

A feeding probe located in the range enclosed by the conductive column and used for feeding, the feeding probe is at least partially embedded in the dielectric substrate and its two ends extend to the coupling gap and the The through hole is inside and exposed to the coupling slot and the through hole.

Preferably, the coupling slot is rectangular.

Preferably, the second conductive layer includes a first side that is opposite and parallel and a second side that connects the adjacent first sides and is opposite and parallel, and the extension line of the long-axis side of the coupling slot is connected to the The first side and/or the second side intersect.

Preferably, the second conductive layer includes a first side that is opposite and parallel to each other and a second side that is connected to the adjacent first side and is opposite and parallel, and the long-axis side of the coupling slot is connected to the first side. or the second side is parallel.

Preferably, a plurality of the conductive pillars are arranged along the periphery of the second conductive layer.

Preferably, the SIW antenna system includes at least two of the antenna units, and at least two of the antenna units are arranged in a row and spliced in sequence to form the SIW antenna system.

The present invention also provides a communication terminal, the communication terminal comprises a ring-shaped frame, a lower case and an upper case respectively covered on opposite sides of the frame, and a frame according to the present invention mounted on the inner side of the frame. In the above-mentioned SIW antenna system provided, the frame is provided with a through opening passing through the frame, and the coupling slot is disposed opposite to the through opening.

Preferably, the frame includes a partition plate extending into the through opening and dividing the through opening into at least two sub-through openings, the SIW antenna system includes at least two of the antenna units, and at least two of the antennas The units are arranged in a one-to-one correspondence with at least two of the sub-ports.

Preferably, the through hole is filled with plastic.

Preferably, the through openings include at least two and are respectively located on opposite sides of the frame, the number of the SIW antenna systems matches the number of the through openings, and the coupling slots of each of the SIW antenna systems are respectively It is arranged opposite to one of the through ports.

beneficial effect

Compared with the related art, in the SIW antenna system of the present invention, the antenna unit of the antenna unit is arranged between the first conductive layer and the second conductive layer, and the conductive columns are arranged to form a ring-shaped structure at intervals, Thereby, the SIW cavity is formed together, the first conductive layer is provided with through holes, the second conductive layer is provided with coupling slits, and the SIW cavity is provided within the range surrounded by conductive pillars and used for feeding. The two ends of the feeding probe are respectively extended into the coupling slot and the through hole and exposed to the coupling slot and the through hole to form a probe feed. The SIW antenna of this structure The system is easy to achieve miniaturization, and can cover multiple 5G millimeter-wave frequency bands such as n257 (26.5GHz - 29.5GHz) and n261 (27.5-28.35GHz), with large bandwidth; when the SIW antenna system is used in communication terminals, due to the SIW antenna system Small in size, it is convenient to install on the side of the communication terminal. It only needs to open the opening on the side to face the coupling gap, without forming a fracture on the side, which avoids damaging the mechanical structure of the communication terminal and improves the overall structural reliability. And improve the overall appearance and structural beauty.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

1 is a three-dimensional schematic diagram of the SIW antenna system of the present invention;

2 is an exploded schematic diagram of the three-dimensional structure of an antenna unit in the SIW antenna system of the present invention;

Fig. 3 is a sectional view along line A-A in Fig. 1;

Fig. 4 is the performance curve diagram of the SIW antenna system of the present invention;

5 is a schematic structural diagram of the SIW antenna system of the present utility model applied to the side of the communication terminal of the present utility model;

Figure 6 is an enlarged view of the part shown in B in Figure 5;

FIG. 7 is a graph of the gain corresponding to the CDF@50% of the communication terminal of FIG. 5 using two SIW antenna systems and the maximum gain of antenna radiation.

Embodiments of the present invention

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, but not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

1-3, the present invention provides an SIW antenna system 100. The SIW antenna system 100 includes an antenna unit 10, and the antenna unit 10 includes a first conductive layer 1 and a second conductive layer 2. , a dielectric substrate 3 , a conductive column 4 and a feeding probe 5 .

The first conductive layer 1 is provided with through holes 11 therethrough.

The second conductive layer 2 is opposite to the first conductive layer 1 and arranged at intervals, and the second conductive layer 2 is provided with a coupling slot 21 penetrating thereon. In this embodiment, the coupling slot 21 is rectangular.

The first conductive layer 1 and the second conductive layer 2 are respectively formed on opposite sides of the dielectric substrate 3 .

The conductive pillars 4 are disposed between the first conductive layer 1 and the second conductive layer 2 . The conductive pillars 4 include a plurality of and are embedded in the dielectric substrate 3 . The pillars 4 are arranged at intervals and together form a ring-shaped structure. Each of the conductive pillars 2 is electrically connected to the first conductive layer 1 and the second conductive layer 2 respectively. The first conductive layer 1, the The second conductive layer 2 and the conductive pillars 4 together form an SIW cavity 20 (Substrate Integrated Waveguide, SIW). The hole 11 communicates with the SIW cavity 20 , and the coupling slot 21 is located within the range enclosed by the conductive pillar 4 , that is, the coupling slot 21 communicates with the SIW cavity 20 .

The feeding probe 5 is at least partially embedded in the dielectric substrate 3 and located in the range enclosed by the conductive column 4 , and the two ends of the feeding probe 5 extend to the coupling slot 21 and the coupling slot 21 respectively. The through hole 11 is inside and exposed to the coupling slot 21 and the through hole 11 , and the feeding probe 5 is connected to a feed source outside the antenna unit 10 for feeding.

In the above structure, the first conductive layer 1, the second conductive layer 2 and the conductive column 4 are designed to form the SIW cavity 20, and the feeding probe 5 extends to one end of the through hole 11 for connecting with the SIW cavity 20. The feed source is connected, and the end extending to the coupling slot 21 is coupled with the coupling slot 21. The feed probe 5 and the coupling slot 21 form a probe slot feeding mode, which can cover n257 (26.5GHz - 29.5GHz) and n261 (27.5-28.35GHz) frequency bands and other 5G millimeter wave frequency bands, with large coverage and large bandwidth.

In this embodiment,

In this embodiment, the second conductive layer 2 includes a first side 201 that is opposite and parallel to each other and a second side 202 that connects the adjacent first sides 201 and is opposite and parallel. The long axis of the coupling slot 21 The extension line of the side intersects the first side 201 and/or the second side 202 .

Of course, the setting angle of the coupling slot 21 is not limited to this. For example, the long axis side of the coupling slot 21 may be parallel to the first side 201 or the second side 202 .

More preferably, a plurality of the conductive pillars 4 are arranged along the periphery of the second conductive layer 2 to form a rectangular structure.

In this embodiment, the SIW antenna system 100 includes at least two of the antenna units 10, and at least two of the antenna units are arranged in a row and formed by splicing, for example, including four antenna units 10. The SIW antenna system 100 has The performance is shown in FIG. 4 , wherein the curve group a is the return loss curve of the four antenna units 10 , and the curve group b is the isolation degree between adjacent antenna units 10 .

Referring to FIGS. 5-6 , the present invention also provides a communication terminal 200 , the communication terminal 200 includes a ring-shaped frame 201 , a lower casing 202 and an upper casing 202 , which are respectively covered on opposite sides of the frame 201 . The casing 203, and the above-mentioned SIW antenna system 100 provided by the present invention installed on the inner side of the frame 201, the frame 201 is provided with a through hole 2011 thereon, and the coupling slot 21 is directly connected to the through hole 2011. pair settings.

Because the port 2011 does not need to cut off the frame 201 to serve as the coupling slot structure of the SIW antenna system 100 , when the SIW antenna system 100 is applied to the communication terminal 200 , only the frame 201 needs to be co-designed to match the coupling slot 21 . The size of the port 2011 is small, which will not destroy the mechanical characteristics of the frame 2011, effectively ensure the stability of its structure, and ensure the overall aesthetic appearance of the structure to the greatest extent.

More preferably, the through port 2011 is filled with plastic, which further improves the overall aesthetic appearance of the communication terminal 200 .

Specifically, the frame 201 includes a partition 2012 extending into the through hole 2011 and dividing the through hole 2011 into at least two sub-through holes 20111, and the SIW antenna system 100 includes at least two of the antenna units 10. At least two of the antenna units 10 are arranged in a one-to-one correspondence with at least two of the sub-through holes 20111 . For example, the port 2011 is divided into four sub-ports 20111, the SIW antenna system 100 includes four antenna units 10, and the four antenna units 10 correspond to the four sub-ports 20111 one-to-one.

In this embodiment, the through holes 2011 include at least two and are located on opposite sides of the frame 201, respectively, the number of the SIW antenna systems 100 matches the number of the through holes 2011, and each SIW antenna system The coupling slits 21 of 100 are respectively disposed opposite to one of the through holes 2011 .

When the communication terminal 200 uses two SIW antenna systems 100, its performance is better. The two SIW antenna systems 100 are arranged on opposite sides of the frame 201 to form a dual-module structure to obtain the maximum gain and CDF (cumulative distribution function). ), as shown in FIG. 7 , the ordinate is the gain (dBI), and the abscissa is the frequency (GHz). It can be seen from FIG. 7 that the antenna system 10 of the communication terminal 200 can achieve a gain of 6dBI when the space covers 50% of the area, Space coverage performance that meets 3GPP requirements.

Compared with the related art, in the SIW antenna system of the present invention, the antenna unit is arranged between the first conductive layer and the second conductive layer to form the conductive pillars in a ring-shaped structure, Thereby, the SIW cavity is formed together, the first conductive layer is provided with through holes, the second conductive layer is provided with coupling slits, and the SIW cavity is provided within the range surrounded by conductive pillars and used for feeding. The two ends of the feeding probe are respectively extended into the coupling slot and the through hole and exposed to the coupling slot and the through hole to form a probe feed. The SIW antenna of this structure The system is easy to achieve miniaturization, and can cover multiple 5G millimeter-wave frequency bands such as n257 (26.5GHz - 29.5GHz) and n261 (27.5-28.35GHz), with large bandwidth; when the SIW antenna system is used in communication terminals, due to the SIW antenna system Small in size, it is convenient to install on the side of the communication terminal. It is only necessary to open the opening on the side to face the coupling gap, and there is no need to form a fracture on the side, which avoids damaging the mechanical structure of the communication terminal and improves the overall structural reliability. And improve the overall appearance and structural beauty.

The above are only the embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and accompanying drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims

An SIW antenna system, characterized in that the SIW antenna system includes an antenna unit, and the antenna unit includes:

a first conductive layer, the first conductive layer is provided with a through hole passing through it;

a second conductive layer, the second conductive layer and the first conductive layer are arranged opposite to and spaced apart, and a coupling gap passing through the second conductive layer is provided on the second conductive layer;

a dielectric substrate, the first conductive layer and the second conductive layer are respectively formed on opposite sides of the dielectric substrate;

Conductive pillars, the conductive pillars are disposed between the first conductive layer and the second conductive layer, the conductive pillars include a plurality of and are embedded in the dielectric substrate, and the conductive pillars are spaced apart Arranged and together to form a ring-shaped structure, each of the conductive pillars is electrically connected to the first conductive layer and the second conductive layer, the first conductive layer, the second conductive layer and the The conductive pillars together form an SIW cavity; the through holes are located in the range enclosed by the conductive pillars, and the coupling slot is located in the range enclosed by the conductive pillars; and,

A feeding probe located in the range enclosed by the conductive column and used for feeding, the feeding probe is at least partially embedded in the dielectric substrate and its two ends extend to the coupling gap and the The through hole is inside and exposed to the coupling slot and the through hole.
The SIW antenna system according to claim 1, wherein the coupling slot is rectangular.
The SIW antenna system according to claim 2, wherein the second conductive layer comprises a first side opposite and arranged in parallel and a second side connected with the adjacent first sides and arranged oppositely in parallel, the The extension line of the long axis side of the coupling slot crosses the first side and/or the second side.
The SIW antenna system according to claim 2, wherein the second conductive layer comprises a first side opposite and arranged in parallel and a second side connected with the adjacent first sides and arranged oppositely in parallel, the The long axis side of the coupling slot is parallel to the first side or the second side.
The SIW antenna system according to claim 3 or 4, wherein a plurality of the conductive pillars are arranged along the periphery of the second conductive layer.
The SIW antenna system according to claim 1, wherein the SIW antenna system comprises at least two of the antenna units, and at least two of the antenna units are arranged in a row and spliced in sequence to form the SIW antenna system.
A communication terminal, characterized in that, the communication terminal comprises a ring-shaped frame, a lower case and an upper case respectively covered on opposite sides of the frame, and a frame as claimed in claim 1- 6. The SIW antenna system according to any one of the preceding items, wherein the frame is provided with a through opening penetrating the frame, and the coupling slot is disposed opposite to the through opening.
The communication terminal according to claim 7, wherein the frame includes a partition extending into the through opening and dividing the through opening into at least two sub-through openings, and the SIW antenna system includes at least two For the antenna units, at least two of the antenna units are arranged in a one-to-one correspondence with at least two of the sub-ports.
The communication terminal according to claim 7, wherein the through hole is filled with plastic.
The communication terminal according to claim 7, wherein the through openings comprise at least two and are respectively located on opposite sides of the frame, the number of the SIW antenna systems matches the number of the through openings, and each The coupling slots of the SIW antenna system are respectively disposed opposite to one of the through ports.