WO2020107259A1

WO2020107259A1 - Dual-polarized micro-strip patch antenna, package antenna, and terminal device

Info

Publication number: WO2020107259A1
Application number: PCT/CN2018/117930
Authority: WO
Inventors: 周伟希; 尹红成
Original assignee: 华为技术有限公司
Priority date: 2018-11-28
Filing date: 2018-11-28
Publication date: 2020-06-04
Also published as: CN112335123B; CN112335123A

Abstract

Embodiments of the present invention relate to the technical field of antennas. Specifically disclosed are a dual-polarized micro-strip patch antenna, a package antenna, and a terminal device. The dual-polarized micro-strip patch antenna comprises a radiation patch, a reference ground, a first probe, and a second probe, wherein the radiation patch is provided with a first slot and a second slot, the first slot and the second slot intersect vertically, the first slot is symmetrical about the second slot, and the second slot is symmetrical about the first slot; an intersection point of the first slot and the second slot is located on the geometric center of the radiation patch; the radiation patch is provided at one side of the reference ground; the first probe and the second probe are respectively connected to the radiation patch, the first slot and the second slot that are vertically orthogonal divide the radiation patch into four right-angle regions, and a first feeding point and a second feeding point are located in two right-angle regions adjacent to each other. The antenna in the technical solution has high polarization isolation, and can be applied to application scenarios that require higher polarization isolation.

Description

Dual-polarized microstrip patch antenna, packaged antenna and terminal equipment

Technical field

The present application relates to the technical field of antennas, and in particular to a dual-polarized microstrip patch antenna, a packaged antenna, and a terminal device.

Background technique

The antenna is a transceiver component of a wireless communication system. Microstrip antennas have the advantages of low profile, low cost, and easy integration, and are widely used in the field of wireless communication. Microstrip antennas have many different structural forms, mainly including three basic components: radiating unit, reference ground and feeding structure. When the radiation unit is implemented in the form of a radiation patch, such an antenna is also called a microstrip patch antenna (mpa).

The direction of the electric field formed when the antenna radiates is the polarization direction of the antenna. The dual polarization of an antenna means that the antenna has two orthogonal polarization directions when radiating, that is, the two polarization directions when the antenna is radiating are perpendicular to each other. Such an antenna can form two non-interfering beams to reduce multipath loss, and the system capacity is twice that of a single-polarized antenna. With the advent of the 5G era, the application range of dual-polarized antennas will further expand from the base station side to the terminal side, becoming the choice of many application scenarios.

The microstrip patch antenna can realize dual polarization through orthogonal position feeding. Please refer to FIG. 1 and FIG. 2. FIG. 1 is a schematic structural view of a microstrip patch antenna, and FIG. 2 is a schematic cross-sectional structure diagram of the microstrip patch antenna of FIG. 1. The microstrip patch antenna includes a reference ground 62 and a radiation patch 61, and the radiation patch 61 is disposed above the reference ground 62. The radiation patch 61 has two feed points, one is a horizontally polarized feed point 611, and the other is a vertically polarized feed point 612, indicating the positions where the two probes are respectively connected to the radiation patch . The horizontally polarized feed point 611 and the line connecting the geometric center of the radiation patch are perpendicular to the vertically polarized feed point 612 and the line connecting the geometric center of the radiation patch, that is, the two straight lines are orthogonal to each other. The polarization directions of the microwave signal fed to the horizontally polarized feeding point 611 and the microwave signal fed to the vertically polarized feeding point 612 are perpendicular to each other. The coaxial feeding through the two feeding points enables the dual-polarization of the microstrip patch antenna.

The dual-polarized microstrip patch antenna can be applied to various application scenarios, such as terminals and base stations. Some of these application scenarios have lower requirements for the polarization isolation of microstrip patch antennas. For example, for general mobile terminals, the polarization isolation can only reach about 10dB. Some application scenarios have high requirements for polarization isolation of microstrip patch antennas. For example, for relay antennas in small and medium-sized base stations for cellular mobile communications, the polarization isolation is generally required to reach 25dB. Therefore, for application scenarios that require high polarization isolation, the dual-polarized microstrip patch antenna shown in Figures 1 and 2 has a strong coupling effect between the two feed points, resulting in the polarities of the antenna The degree of chemical isolation is low, so it cannot be applied to such application scenarios.

Summary of the invention

The present application provides a dual-polarized microstrip patch antenna, a packaged antenna, and terminal equipment to solve the problem of low polarization isolation of existing antennas.

In a first aspect, the present application provides a dual-polarized microstrip patch antenna, the antenna includes a radiation patch, a reference ground, a first probe, and a second probe, wherein: the radiation patch is provided with a first A slot and a second slot, the first slot and the second slot intersect perpendicularly, the first slot is symmetrical about the second slot, the second slot is symmetrical about the first slot; the first The intersection of a groove and the second groove is located on the geometric center of the radiation patch; the radiation patch is disposed on one side of the reference ground; the first probe and the second probe are respectively Connected to the radiation patch, the first probe feeds the radiation patch at a first feeding point, and the second probe feeds the radiation patch at a second feeding point, The vertically orthogonal first groove and the second groove divide the radiation patch into four right-angle areas, and the first feeding point and the second feeding point are located in two adjacent Right angle area.

In this implementation, the first slot and the second slot are opened on the radiation patch, and the first feeding point and the second feeding point are respectively arranged adjacent to each other by the first slot and the second slot In the two right-angle areas of the first feed point and the second feed point. In this way, when the radiation patch is excited, the path of the current on the radiation patch can be changed, and most of the current from one feeding point is blocked outside the right-angle area where the other feeding point is located, thereby reducing The current flowing from one feeding point to the other feeding point improves the polarization isolation of the antenna. Such an antenna can be applied to application scenarios that require higher polarization isolation, which broadens the application range of the antenna. In addition, since the first slot on the radiation patch is symmetrical with respect to the second slot, and the second slot is symmetrical with respect to the first slot, the first slot and the second slot provided will not destroy the dual polarization characteristics of the antenna.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the connection line between the first feeding point and the geometric center of the radiation patch corresponds to the right-angle area where the first feeding point is located A right angle bisector, the second feeding point and the first feeding point are symmetrical about the first slot or the second slot between them. With this implementation, the antenna can have a higher degree of symmetry in the two polarization directions.

With reference to the first aspect and the foregoing possible implementation manners, in a second possible implementation manner of the first aspect, current guide grooves are respectively provided at both ends of the first groove, and are located at either end of the first groove The current guiding groove intersects the corresponding end of the first groove; the two ends of the second groove are respectively provided with current guiding grooves, and the current guiding groove at any end of the second groove and the second groove The corresponding end intersects. With this implementation, the current guiding slot can restrain part of the current from one feeding point together with the first slot and the second slot, blocking its flow to another feeding point, thereby further improving the polarization isolation of the antenna.

With reference to the first aspect and the foregoing possible implementation manners, in a third possible implementation manner of the first aspect, the current guiding slot includes a third sub-slot and a fourth sub-slot; one end of the third sub-slot is One end of the fourth sub-groove intersects either end of the first groove, and the third sub-groove and the fourth sub-groove are symmetrical with respect to the first groove; or, one end of the third sub-groove One end of the fourth sub-slot intersects with either end of the second slot, and the third sub-slot and the fourth sub-slot are symmetrical with respect to the second slot. With this implementation, the third sub-slot and the fourth sub-slot can restrain part of the current from one feeding point together with the first and second slots, blocking their flow to another feeding point, thereby further increasing the pole of the antenna化 isolation.

With reference to the first aspect and the foregoing possible implementation manners, in a fourth possible implementation manner of the first aspect, the angle formed by the intersection of the third sub-slot and the fourth sub-slot toward the geometric center is a right angle Or obtuse angle. With this implementation, the third sub-slot and the fourth sub-slot can better block the current from one feeding point in the area surrounded by the first, second, third and fourth sub-slots In addition, so that less current can flow to another feed within the area, further improving the polarization isolation of the antenna.

With reference to the first aspect and the foregoing possible implementation manners, in a fifth possible implementation manner of the first aspect, the current guiding groove is an arc-shaped groove, where: the arc-shaped groove is located at any position of the first groove At one end, the arc-shaped groove is symmetrical about the first groove; or, when the arc-shaped groove is located at either end of the second groove, the arc-shaped groove is symmetrical about the second groove. With this implementation, the arc-shaped slot can restrain part of the current from one feeding point together with the first slot and the second slot, blocking its flow to another feeding point, thereby further improving the polarization isolation of the antenna.

With reference to the first aspect and the foregoing possible implementation manners, in a sixth possible implementation manner of the first aspect, a first dielectric layer, the first groove, and all are provided between the radiation patch and the reference ground The second groove is filled with an insulating material, and the insulating material is the same as the material of the first dielectric layer. With this implementation, since the insulating material is the same as the first dielectric layer, the antenna can be easily manufactured.

With reference to the first aspect and the foregoing possible implementation manners, in a seventh possible implementation manner of the first aspect, the lengths of the first groove and the second groove are equal. With this implementation, the antenna can have a higher degree of symmetry in the two polarization directions.

With reference to the first aspect and the foregoing possible implementation manners, in an eighth possible implementation manner of the first aspect, the shape of the radiation patch is a square, and the centerline of the first groove is substantially a pair of the square Angular line, the center line of the second groove is substantially another diagonal line of the square, the extending direction of the center line of the first groove is the same as the length direction of the first groove, the second groove The extending direction of the centerline of is the same as the length direction of the second groove. With this implementation, the antenna can have a higher degree of symmetry in the two polarization directions.

With reference to the first aspect and the foregoing possible implementation manners, in a ninth possible implementation manner of the first aspect, the microwave signal fed to the first feeding point and the microwave signal fed to the second feeding point The polarization directions are perpendicular to each other. With this implementation, the antenna can be dual-polarized when in use.

With reference to the first aspect and the foregoing possible implementation manners, in a tenth possible implementation manner of the first aspect, a side of the radiation patch facing away from the reference ground is provided with a parasitic patch. The connection line between the geometric center and the geometric center of the radiation patch is perpendicular to the radiation patch. Based on this, the radiation patch with the first slot, the second slot and the current guiding slot provided in this application can be applied to a single-layer patch antenna or a multi-layer patch antenna, with a wide range of applications .

In a second aspect, the present application provides a packaged antenna including a radiation patch, a reference ground, a first feed path, a second feed path, and a radio frequency chip, wherein: the radiation patch is provided with a first A slot and a second slot, the first slot and the second slot intersect perpendicularly, the first slot is symmetrical about the second slot, the second slot is symmetrical about the first slot; the first The intersection of a slot and the second slot is located on the geometric center of the radiation patch; the radiation patch is disposed on one side of the reference ground; one end of the first feed path and the radiation patch Connected to the radio frequency chip at the other end, the first feeding path feeds the radiation patch at a first feeding point; one end of the second feeding path is connected to the radiation patch , The other end is connected to the radio frequency chip, and the second feeding path feeds the radiation patch at a second feeding point; the vertically orthogonal first slot and the second slot feed the The radiation patch is divided into four right-angle areas, and the first feeding point and the second feeding point are located in two adjacent right-angle areas.

In this implementation, the first slot and the second slot are opened on the radiation patch, and the first feeding point and the second feeding point are respectively arranged adjacent to each other by the first slot and the second slot In the two right-angle areas of the first feed point and the second feed point. In this way, when the radiation patch is excited, the path of the current on the radiation patch can be changed, and most of the current from one feeding point is blocked outside the right-angle area where the other feeding point is located, thereby reducing The current flowing from one feeding point to the other feeding point improves the polarization isolation of the packaged antenna. Such a packaged antenna can be applied to application scenarios requiring higher polarization isolation, which broadens the application range of the packaged antenna. In addition, since the first slot on the radiation patch is symmetrical with respect to the second slot, and the second slot is symmetrical with respect to the first slot, the first slot and the second slot provided will not destroy the dual polarization characteristics of the packaged antenna.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the connection line between the first feeding point and the geometric center of the radiation patch corresponds to the right-angle area where the first feeding point is located A right angle bisector, the second feeding point and the first feeding point are symmetrical about the first slot or the second slot between them.

With reference to the second aspect and the foregoing possible implementation manners, in a second possible implementation manner of the second aspect, the two ends of the first slot are respectively provided with current guiding slots, and are located at either end of the first slot The current guiding groove intersects the corresponding end of the first groove; the two ends of the second groove are respectively provided with current guiding grooves, and the current guiding groove at any end of the second groove and the second groove The corresponding end intersects.

With reference to the second aspect and the foregoing possible implementation manners, in a third possible implementation manner of the second aspect, the current guiding slot includes a third sub-slot and a fourth sub-slot; one end of the third sub-slot is One end of the fourth sub-groove intersects either end of the first groove, and the third sub-groove and the fourth sub-groove are symmetrical with respect to the first groove; or, one end of the third sub-groove One end of the fourth sub-slot intersects with either end of the second slot, and the third sub-slot and the fourth sub-slot are symmetrical with respect to the second slot.

With reference to the second aspect and the foregoing possible implementation manners, in a fourth possible implementation manner of the second aspect, the angle formed by the intersection of the third sub-groove and the fourth sub-groove facing the geometric center is a right angle Or obtuse angle.

With reference to the second aspect and the foregoing possible implementation manners, in a fifth possible implementation manner of the second aspect, the current guiding groove is an arc-shaped groove; when the arc-shaped groove is located at either end of the first groove , The arc-shaped groove is symmetrical about the first groove; or, when the arc-shaped groove is located at either end of the second groove, the arc-shaped groove is symmetrical about the second groove.

With reference to the second aspect and the foregoing possible implementation manners, in a sixth possible implementation manner of the second aspect, a first dielectric layer is provided between the radiation patch and the reference ground, and the first groove and the The second groove is filled with an insulating material, and the insulating material is the same as the material of the first dielectric layer.

With reference to the second aspect and the foregoing possible implementation manners, in a seventh possible implementation manner of the second aspect, the lengths of the first groove and the second groove are equal.

With reference to the second aspect and the foregoing possible implementation manners, in an eighth possible implementation manner of the second aspect, the shape of the radiation patch is a square, and the centerline of the first slot is substantially a pair of the square Angular line, the center line of the second groove is substantially another diagonal line of the square, the extending direction of the center line of the first groove is the same as the length direction of the first groove, the second groove The extending direction of the centerline of is the same as the length direction of the second groove.

With reference to the second aspect and the foregoing possible implementation manners, in a ninth possible implementation manner of the second aspect, the microwave signal fed to the first feeding point and the microwave signal fed to the second feeding point The polarization directions are perpendicular to each other.

With reference to the second aspect and the foregoing possible implementation manners, in a tenth possible implementation manner of the second aspect, a side of the radiation patch facing away from the reference ground is provided with a parasitic patch. The connection line between the geometric center and the geometric center of the radiation patch is perpendicular to the radiation patch.

In a third aspect, the present application provides a terminal device, including a radio frequency signal processing circuit and an antenna, wherein the radio frequency signal processing circuit is used to process a received radio frequency signal or a radio frequency signal to be transmitted, and the antenna is used to receive or transmit For the radio frequency signal, the antenna is any dual-polarized microstrip patch antenna of the first aspect.

In this implementation, the first slot and the second slot are opened on the radiation patch of the antenna to change the current path between the two feeding points on the radiation patch to reduce the flow from one feeding point to the other The current at a feed point, thereby increasing the polarization isolation of the antenna. The terminal equipment with such an antenna has less mutual interference between the received signal and the transmitted signal, which is conducive to better transmission and reception duplex.

BRIEF DESCRIPTION

In order to explain the technical solution of the present application more clearly, the drawings required in the embodiments will be briefly introduced below.

FIG. 1 is a schematic structural plan view of a microstrip patch antenna in the prior art;

2 is a schematic cross-sectional structure diagram of the microstrip patch antenna of FIG. 1;

FIG. 3 is a schematic diagram of the top structure of a dual-polarized microstrip patch antenna using coupled feeding;

4 is a schematic side view of the dual-polarized microstrip patch antenna of FIG. 3;

FIG. 5 is a schematic structural plan view of an implementation manner of a dual-polarized microstrip patch antenna in an embodiment of the present application;

6 is a schematic diagram of a side structure of the antenna of FIG. 5;

FIG. 7 is a schematic structural plan view of a dual-polarized microstrip patch antenna with a circular radiation patch in an embodiment of the present application;

8 is a schematic side view structure diagram of another implementation manner of a dual-polarized microstrip patch antenna in an embodiment of the present application;

9 is a schematic diagram of the current curve on the radiation patch when the second feed point of the antenna of FIG. 1 is excited;

10 is a schematic diagram of the current curve on the radiation patch when exciting the second feeding point of the antenna shown in FIG. 5 of the present application;

FIG. 11 is a simulation polarization isolation curve diagram of an antenna using an unslotted radiation patch and an antenna using the radiation patch in the embodiment of the present application;

12 is a schematic structural plan view of an implementation manner of a dual-polarized microstrip patch antenna with a current guide slot in an embodiment of the present application;

13 is a schematic side view of the antenna structure of FIG. 12;

14 is a schematic diagram of the current curve on the radiation patch when exciting the second feeding point of the antenna shown in FIG. 12 of the present application;

15 is a schematic structural plan view of another implementation manner of a dual-polarized microstrip patch antenna with a current guide slot in an embodiment of the present application;

16 is a schematic structural plan view of an implementation manner of an antenna with a parasitic patch in an embodiment of the present application;

17 is a schematic diagram of a side structure of the antenna of FIG. 16;

18 is a schematic side view of an implementation manner of a packaged antenna in an embodiment of the present application;

19 is a schematic structural diagram of an implementation manner of a terminal device in an embodiment of this application.

Description of reference signs:

Figures 1 and 2: Radiation patch 61; horizontal polarization feed point 611; vertical polarization feed point 612; reference ground 62; microstrip line 63; probe 64;

Figures 3 and 4: radiation patch 71; reference ground 72; microstrip line 73; H-shaped groove 74;

5 to 18: radiation patch 1; first slot 11; second slot 12; intersection point 13; first feed point 14; second feed point 15; arrow-shaped slot 16; third sub-slot 161; Four sub-groove 162; arc-shaped groove 17; reference ground 2; first dielectric layer 3; probe 4; first probe 41; second probe 42; first feed path 43; second feed path 44; Parasitic patch 5; radio frequency chip 100; printed circuit board 200; first solder ball 300; second solder ball 400; antenna 500; radio frequency signal processing circuit 600.

detailed description

The embodiments of the present application will be described in detail below.

In order to facilitate understanding of the technical solution of the present application, the two concepts of the feeding point and isolation of the antenna are briefly introduced below.

The feed point of the antenna (feedpoint), also called the feed port, mainly refers to the interface between the feeder and the antenna. For some microstrip patch antennas, the feed point marked on the radiation patch indicates the position where the probe is connected to the radiation patch. The position of the feed point on the radiation patch is different, that is, the contact position of the probe and the surface of the radiation patch is different, then the impedance of the antenna is correspondingly different. When designing the antenna, you can match the impedance of the antenna with the impedance of the feeder by selecting an appropriate location.

For a dual-polarized microstrip patch antenna, it generally uses two probes to connect the radiation patch and the signal emitting device, respectively. In this way, there are two feeding points on the radiation patch, and these two feeding points are at orthogonal positions on the radiation patch, and the polarization directions of the microwave signals fed to the two feeding points are generally perpendicular to each other. For example, in FIG. 1 and FIG. 2, the geometric center of the radiation patch point C and the horizontally polarized feed point 611 are connected to a line perpendicular to the point C and the vertically polarized feed point 612. That is, the two straight lines are orthogonal positions. The polarization direction of the microwave signal fed to the horizontally polarized feed point 611 is parallel to the ground plane, and the polarization direction of the microwave signal fed to the vertically polarized feed point 612 is perpendicular to the ground plane, two microwave signals The polarization directions are perpendicular to each other. The above two microwave signals with different polarization directions can make the antenna have dual polarization characteristics, and at the same time will not destroy the balance of the antenna current, causing the problem of asymmetry of the antenna pattern.

Isolation refers to the ratio of the transmit power of one antenna to the power received by another antenna, and the unit can be dB. The isolation of the antenna is used to quantitatively characterize the strength of the coupling between the antennas.

For dual-polarized microstrip patch antennas, polarization isolation refers to the ratio of the power of signals fed in one polarization direction to the power that occurs in the other polarization direction. The unit of polarization isolation can be dB. Take the logarithm of base 10 as the ratio of the power, that is, lg, to obtain the value of polarization isolation expressed in dB as the counting unit. For example, in the dual-polarized microstrip patch antenna shown in FIG. 1, when the vertical polarization is excited, the signal power fed to the vertical polarization direction through the vertical polarization feed point is P1, while the vertical polarization Part of the current at the feed point flows to the horizontally polarized feed point, so that a signal appears in the direction of horizontal polarization, the signal power is P2, then the polarization isolation can be expressed as P1/P2, or lg(P1/P2)dB . At this time, the larger the value of the polarization isolation, the smaller the degree of mutual interference between the two polarization directions on the dual-polarized microstrip patch antenna.

In order to improve the polarization isolation, a prior art improves the feeding method of the dual-polarized microstrip patch antenna. Please refer to FIG. 3 and FIG. 4. FIG. 3 is a schematic structural plan view of a dual-polarized microstrip patch antenna using coupled feeding, and FIG. 4 is a schematic structural side view of the antenna of FIG. 3. The antenna includes a radiation patch 71 and a reference ground 72. Among them, two H-shaped grooves 74 are opened on the reference ground 72, and the two H-shaped grooves 74 are orthogonal. Two microstrip lines 73 are provided below the reference ground 72, and the two microstrip lines 73 are respectively provided directly below the two H-shaped grooves 74 and are perpendicular to each other. The polarization directions of the microwave signals fed by the two microstrip lines 73 are perpendicular to each other. Through this coupling and feeding method, the microstrip patch antenna has better polarization isolation.

However, due to the coupled feed method, the microstrip line 73 is below the reference ground 72. Therefore, the microstrip line 73 also generates radiation below the reference ground 72, resulting in a front-to-to-front ratio of the microstrip patch antenna. -rear ratio) is poor, and the gain is reduced accordingly.

In order to improve the problem of the front-to-back ratio difference, a reflective plate can be added below the microstrip line 73 to reflect the radiation of the microstrip line 73 below the reference ground 72 upward, thereby improving the front-to-back ratio of the antenna. But at the same time, this will also bring another problem, that is, adding a reflective plate will increase the overall height of the microstrip patch antenna, which is not conducive to miniaturization and cost control of the dual-polarized microstrip patch antenna. That is to say, although the above-mentioned dual-polarized microstrip patch antenna has better polarization isolation, there is a problem that the overall height of the antenna is higher and the cost is higher.

To this end, this application proposes a microstrip patch antenna, a slot is formed in the radiating patch of the microstrip patch antenna to isolate the feeding points of different polarization directions, so as not to increase the dual-polarized microstrip patch In the case of the overall height of the patch antenna, the polarization isolation of the dual-polarized microstrip patch antenna is improved.

The first embodiment of the present application provides a dual-polarized microstrip patch antenna. Please refer to FIG. 5 and FIG. 6. FIG. 5 is a top schematic structural view of one implementation of the dual-polarized microstrip patch antenna of the present application. FIG. 6 is a schematic structural side view of FIG. 5. The antenna includes a radiation patch 1, a reference ground 2, and a first probe 41 and a second probe 42. The radiation patch 1 is provided with a first groove 11 and a second groove 12, wherein the first groove 11 and the second groove 12 intersect perpendicularly, and the first groove 11 is symmetrical with respect to the second groove 12, and the second groove 12 is with respect to the first groove 11 Symmetrical; the intersection 13 of the first groove 11 and the second groove 12 is located at the geometric center of the radiation patch 1. The radiation patch 1 is disposed on one side of the reference ground 2. One end of the first probe 41 is connected to the radiation patch, and the other end may be connected to a signal transmission device (not shown). The first probe 41 feeds the radiation patch 1 at the first feeding point 14. One end of the second probe 42 is connected to the radiation patch 1 and the other end may be connected to the signal transmission device. The second probe 42 feeds the radiation patch 1 at the second feeding point 15. The vertically orthogonal first groove 11 and the second groove 12 divide the radiation patch 1 into four right-angle areas, and the first feeding point 14 and the second feeding point 15 are located in two adjacent right-angle areas.

The shape of the radiation patch 1 may be a center-symmetric shape, such as a circle or a regular polygon. 7 is a schematic diagram of a top view of a dual-polarized microstrip patch antenna whose radiation patch 1 is circular, wherein the shapes of the radiation patch 1 and the reference ground 2 are both circular. In addition, the first slot 11, the second slot 12, the intersection point 13, the first feeding point 14 and the second feeding point 15 are the same as those in FIGS. 5 and 6 and will not be repeated here. When the shape of the radiation patch 1 is a regular polygon, the number of sides is an even number, for example, the regular polygon is a square, regular hexagon, regular octagon, etc.

The material of the radiation patch 1 may be a metal material, such as copper, gold, silver, stainless steel, or the like. Taking copper as an example, due to its low price and high electrical conductivity, it can make the antenna more efficient and less lossy, and at the same time it is beneficial to control costs.

The slots formed on the radiation patch 1 in the embodiment of the present application, such as the aforementioned first slot 11, second slot 12, and subsequent third sub-slot 161, fourth sub-slot 162, arc-shaped slot 17, etc. It refers to a groove located in the radiation patch 1 and penetrating from one surface of the radiation patch 1 to the other surface of the radiation patch 1 along the thickness direction of the radiation patch 1.

The shapes of the first slot 11 and the second slot 12 on the radiation patch 1 are regular figures, and the shape can be a single figure shape, such as a rectangle, an ellipse, etc., or a shape formed by stitching multiple figures, such as a rectangle The shape formed by joining two semicircles at both ends is not limited in this application. The lengths of the first groove 11 and the second groove 12 may be equal or different. When the lengths of the first slot 11 and the second slot 12 are equal, the degree of symmetry of the dual polarized microstrip patch antenna in the two polarization directions is higher. The specific shapes and sizes of the first slot 11 and the second slot 12 can be determined by simulation and experiment according to the product performance requirements of the antenna.

The first slot 11 and the second slot 12 that vertically intersect divide the radiation patch 1 into four right-angle regions, the first feed point 14 is located in any one of the right-angle regions, and the second feed point 15 is located The electric point 14 is located in another right-angle area adjacent to the right-angle area. In this way, the first feeding point 14 and the second feeding point 15 are separated by the first groove 11 or the second groove 12 between the two right-angle areas.

Optionally, referring to FIG. 5, the right angle corresponding to the right-angle area where the first feed point 14 is located is α angle, the right angle corresponding to the right-angle area where the second feed point 15 is located is β angle, and the first feed point 14 is attached to the radiation patch The connection line of the geometric center of the sheet 1 is an angle bisector of angle α, and the second feeding point 15 and the first feeding point 14 are symmetrical about the first slot 11 between them, that is, the second feeding point 15 and the radiation The connection line of the geometric center of the patch 1 is the angle bisector of the angle β. It should be understood that when the slot between the second feeding point 15 and the first feeding point 14 is the second slot 12, the two are correspondingly symmetrical about the second slot 12 between them.

Reference ground 2, also referred to as a ground plate, may have the same shape as the radiation patch 1 or different from the radiation patch 1, which is not limited in this application. The material of reference ground 2 may be a metal material, such as copper, gold, silver, stainless steel, or the like.

A gas such as air, nitrogen, etc. can be filled between the reference ground 2 and the radiation patch 1. In addition, a first dielectric layer may also be provided between the reference ground 2 and the radiation patch 1. Please refer to FIG. 8, which is a schematic diagram of a side view structure of one implementation manner of the dual-polarized microstrip patch antenna of the present application. In the implementation shown in FIG. 8, the first slot 11, the second slot 12, the intersection 13, the first feed point 14, the second feed point 15, the first probe 41, the second probe 42 and the reference The ground 2 is the same as that in the aforementioned FIG. 6 and will not be repeated here. A first dielectric layer 3 is provided between the reference ground 2 and the radiation patch 1, the first dielectric layer 3 is a non-gas material, in addition, the first slot 11, the second slot 12, the first feeding point 14, the second The feeding point 15, the first probe 41 and the second probe 42 are the same as those in FIG. 6 and will not be repeated here. Optionally, the relative dielectric constant of the first dielectric layer 3 is greater than that of air. For example, the material of the first dielectric layer 3 may be polytetrafluoroethylene.

Optionally, the first groove 11 and the second groove 12 may be filled with an insulating material. The insulating material here refers to a material that is not conductive within a certain voltage range, and its resistivity is very high, generally in the range of 10 ¹⁰ ～ 10 ²² Ω·m, such as polytetrafluoroethylene, glass fiber epoxy resin, etc. . The insulating material may be the same as or different from the material of the first dielectric layer. When the insulating material and the material of the first dielectric layer are the same, it is more convenient for the processing of the antenna.

One end of the first probe 41 is connected to the radiation patch 1, and the other end may be connected to a signal emitting device, such as a radio frequency chip, etc., so as to feed the signal to the radiation patch 1. Similarly, one end of the second probe 42 is connected to the radiation patch 1, and the other end may also be connected to the signal transmitting device. The signal emitting device and the other end of the probe can be connected by various connection methods, for example, by microstrip lines or solder balls, which is not limited in this application. Generally, the first probe 41 and the second probe 42 can pass through the reference ground 2 respectively when connecting the radiation patch 1 and the signal transmitting device. The first probe 41 and the second probe 42 may have various specific implementation forms, such as metalized vias, metal pillars, and the like.

For a dual-polarized antenna, the first probe 41 and the second probe 42 are respectively used to feed signals with two polarization directions perpendicular to each other, so that the antenna has dual-polarization characteristics. That is, the polarization directions of the microwave signal fed to the first feeding point 14 and the microwave signal fed to the second feeding point 15 are perpendicular to each other.

It should be noted that, in addition to the first probe 41 and the second probe 42, the antenna may also include other probes, for example, a third probe and a fourth probe (not shown in the figure). Among them, one end of the third probe and the fourth probe are respectively connected to the radiation patch, and the other end can be respectively connected to the signal emitting device, the third probe and the second probe can be symmetrical about the second slot, and the fourth probe The first probe may be symmetrical about the second slot.

When the above dual-polarized microstrip patch antenna is used, a signal can be fed to the radiation patch through a probe to excite the radiation patch and generate or receive electromagnetic wave signals. By arranging the first slot and the second slot on the radiation patch, the radiation patch is divided into four right-angle areas. The position where the two probes are connected to the radiation patch, that is, the first feeding point and the second feeding point are arranged in two adjacent right-angle areas, thereby separating the first feeding point and the second feeding point . With this structure, you can change the path of the current on the radiating patch, and block most of the current from one feed point outside the right-angle area where the other feed point is located, reducing the feed from one of the feed points. The current flowing from one point to another feeding point further improves the polarization isolation of the antenna. In addition, since the first slot on the radiation patch is symmetrical about the second slot, and the second slot is symmetrical about the first slot, the first slot and the second slot will not destroy the dual polarization characteristics of the antenna. Such a dual-polarized microstrip patch antenna can be applied to application scenarios requiring higher polarization isolation, thereby broadening the application range of the dual-polarized microstrip patch antenna.

For an ungrooved radiation patch, FIG. 9 shows the current curve on the radiation patch when the second feed point 15 is excited. For the radiation patch after the first slot 11 and the second slot 12 are opened, FIG. 10 shows the current curve on the radiation patch when the second feeding point 15 is excited. In the two current curve diagrams, the darker the color and the greater the density, the stronger the current. It can be seen that when the slot is not slotted, a strong current flows from the second feeding point 15 to the first feeding point 14, and after the first slot 11 and the second slot 12 are opened, the current flowing from the second feeding point 15 The flow direction of the current changes, reducing the current flowing from the second feeding point 15 to the first feeding point 14.

Fig. 11 shows that in the simulation experiment, the antenna using the unslotted radiation patch, that is, the original patch antenna, and the antenna using the radiation slot with the first slot and the second slot, the polarization isolation of the two Degrees curve. Among them, the abscissa indicates the operating frequency of the antenna, and the ordinate indicates the polarization isolation of the antenna. It should be noted that, in the polarization isolation graph obtained by this simulation experiment, since the polarization isolation is expressed by lg(P2/P1)dB, its value is generally negative. At this time, the larger the absolute value of the numerical value shown in the figure, the smaller the degree of mutual interference between the two polarization directions. It can be seen from Figure 11 that in the working frequency band of 26.50-29.50GHz, the polarization isolation of the antenna using the original patch has a maximum value of -13.73dB, and the radiation patch with the first slot and the second slot is used. The maximum polarization isolation of the antenna is -26.12dB. Described in terms of the absolute value of the polarization isolation, the minimum value of the polarization isolation between the two feed points is raised from about 13 dB from slotting to about 26 dB after slotting. This shows that opening the first slot and the second slot on the radiation patch can greatly improve the polarization isolation of the antenna.

In addition, compared with the foregoing two implementations for improving polarization isolation, the antenna in this embodiment does not need to add an additional stack, such as an additional reflective plate, etc., and thus does not increase the overall height of the antenna, which is beneficial to Antenna cost control.

In order to further improve the polarization isolation, the embodiment of the present application further improves the radiation patch. Optionally, current guide grooves are respectively provided at both ends of the first groove 11, and the current guide grooves located at any one end of the first groove 11 intersect the corresponding end of the first groove 11. Current guide grooves are also provided at both ends of the second groove 12, and the current guide grooves located at any one end of the second groove 12 intersect the corresponding end of the second groove 12. By providing current guiding slots at both ends of the first slot 11 and the second slot 12, part of the current from one feeding point can be restricted and blocked from flowing to another feeding point, thereby improving the polarization isolation of the antenna.

Please refer to FIG. 12 and FIG. 13. FIG. 12 is a schematic structural view of a top view of one implementation of a dual-polarized microstrip patch antenna with a current guiding slot. FIG. 13 is a schematic structural view of the side view of FIG. 12. In the implementation shown in FIGS. 12 and 13, the first slot 11, the second slot 12, the first feeding point 14, the second feeding point 15, the first probe 41, the second probe 42 and the reference Ground 2 is the same as that in the foregoing FIG. 5 and FIG. 6 and will not be repeated here. The current guiding slot may be an arrow-shaped slot 16, including a third sub-slot 161 and a fourth sub-slot 162. It should be understood that the current guiding groove may refer to any one of the current guiding grooves located at both ends of the first groove 11 or the current guiding grooves located at both ends of the second groove 12.

An arrow-shaped groove 16 may be provided at each end of the first groove 11 and the two ends of the second groove 12. For the arrow-shaped groove 16 provided at one end of the first groove 11, one end of the third sub-groove 161 and one end of the fourth sub-groove 162 intersect at one end of the first groove 11, and the third sub-groove 161 and the fourth The sub-groove 162 is symmetrical about the first groove 11. Correspondingly, for the arrow-shaped groove 16 provided at the other end of the first groove 11, one end of the third sub-groove 161 and one end of the fourth sub-groove 162 intersect the other end of the first groove 11. Similarly, for the arrow-shaped slot 16 provided at one end of the second slot 12, the end of the third sub slot 161 and the end of the fourth sub slot 162 intersect at the end of the second slot 12, and the third sub slot 161 It is symmetrical with the fourth sub-groove 162 about the second groove 12. For the arrow-shaped groove 16 provided at the other end of the second groove 12, one end of the third sub-groove 161 and one end of the fourth sub-groove 162 intersect the other end of the second groove 12.

For the radiation patch 1 after the first slot 11, the second slot 12 and the arrow-shaped slot 16 are opened, FIG. 14 shows the current curve on the radiation patch 1 when the second feeding point 15 is excited. Comparing the current curve of FIG. 14 with FIG. 10, it can be seen that the current guiding groove further blocks part of the current from the second feeding point 15 so that it cannot flow to the first feeding point 14, thereby improving the two feedings Polarization isolation between points.

The angle formed by the intersection of the third sub-groove 161 and the fourth sub-groove 162 of the arrow-shaped groove 16 is toward the geometric center, and the angle may be an acute angle, a right angle, or an obtuse angle. Optionally, when the angle is a right angle or an obtuse angle, the arrow-shaped slot 16 can better block the current from a feeding point to be enclosed by the first slot 11, the second slot 12, and the arrow-shaped slot 16 Outside the area, so that less current can flow to another feed within the area, further improving the polarization isolation of the antenna.

The shapes of the third sub-groove 161 and the fourth sub-groove 162 are regular figures, and the shape may be a single figure shape, such as a rectangle, an ellipse, etc., or a shape formed by splicing multiple figures, for example, two ends of a rectangle are spliced This semi-circular shape is not limited in this application. The lengths of the third sub-groove 161 and the fourth sub-groove 162 may be equal or different. When the lengths of the third sub-slot 161 and the fourth sub-slot 162 are equal, the degree of symmetry of the dual-polarized microstrip patch antenna in the two polarization directions is higher. The specific shapes and sizes of the third sub-groove 161 and the fourth sub-groove 162 can be determined through simulation and experiment according to the product performance requirements of the antenna.

Please refer to FIG. 15, which is a schematic structural top view of another implementation manner of a dual-polarized microstrip patch antenna with a current guiding slot. In the implementation shown in FIG. 15, the first slot 11, the second slot 12, the intersection 13, the first feed point 14, the second feed point 15 and the reference ground 2 are the same as in the aforementioned FIG. 7, here No longer. The current guiding slot may be an arc-shaped slot 17, and both ends of the first slot 11 and the second slot 12 may be provided with an arc-shaped slot 17, the arc-shaped slot 17 and the first slot 11 at one end of the first slot 11 One end of the first groove 11 intersects, and the arc-shaped groove 17 at the other end of the first groove 11 intersects the other end of the first groove 11 accordingly. Similarly, the arc-shaped groove 17 at one end of the second groove 12 intersects one end of the second groove 12, and the arc-shaped groove 17 at the other end of the second groove 12 intersects the other end of the second groove 12 accordingly.

Optionally, for the arc-shaped groove 17 provided at either end of the first groove 11, the arc-shaped groove 17 is symmetrical with respect to the first groove 11. For the arc-shaped groove 17 provided at either end of the second groove 12, the arc-shaped groove 17 is symmetrical with respect to the second groove 12. At this time, the antenna has a higher degree of symmetry in the two polarization directions.

Here, the arc length, diameter, etc. of the arc-shaped slot 17 can be determined through simulation and experiment according to the product performance requirements of the antenna, which is not limited in this application.

It should be understood that regardless of whether the current guiding groove is an arrow-shaped groove or an arc-shaped groove, the radiation patch may have a circular, regular polygonal, etc. center-symmetric shape.

Optionally, when the shape of the radiation patch 1 is square, the current guiding groove is an arrow-shaped groove 16, and the angle formed by the third sub-groove 161 and the fourth sub-groove 162 is a right angle, as shown in FIG. When the shape of the radiation patch 1 is circular, the current guiding groove is an arc-shaped groove 17, and the center of the arc-shaped groove 17 coincides with the center of the radiation patch 1, as shown in FIG. 15. At this time, the shape of the current guiding groove is similar to the shape of the edge of the radiation patch, which is beneficial to improve the degree of polarization of the antenna.

Taking the radiation patch shown in FIG. 14 as an example, the third sub-groove 161 is parallel to the two sides of the radiation patch 1, and the fourth sub-groove 162 is parallel to the other two sides of the radiation patch 1. It can be seen from the figure that the current blocked by the arrow-shaped groove 16 is mainly concentrated in the area near the outside of the arrow-shaped groove 16, and the area is outward to the area of the edge of the radiation patch. The current curve is generally straight, and it is less affected by the concentration area The squeezing effect of current. In this way, the influence of the arrow-shaped groove 16 on the degree of polarization of the antenna is reduced.

Optionally, referring to FIG. 5, when the shape of the radiation patch 1 is square, the center line of the first slot 11 is substantially a diagonal line of the square radiation patch, and the center line of the second slot 12 is substantially square The other diagonal of the radiation patch. The extending direction of the center line of the first groove 11 is the same as the longitudinal direction of the first groove 11, and the extending direction of the center line of the second groove 12 is the same as the longitudinal direction of the second groove 12. At this time, the radiation patch 1 is axisymmetric with respect to the first slot 11 and also axisymmetric with respect to the second slot 12, so that the dual-polarization characteristic of the antenna is not damaged, and the performance of the antenna in two polarization directions is consistent The degree is higher.

The radiation patch with the first slot, the second slot and the current guiding slot provided in the embodiment of the present application can be applied to a single-layer patch antenna or a multi-layer patch antenna. Please refer to FIG. 16 and FIG. 17. FIG. 16 is a schematic structural plan view of an implementation manner of an antenna with a parasitic patch, and FIG. 17 is a schematic structural side view of the antenna shown in FIG. 16. In the implementation shown in FIGS. 16 and 17, the first slot 11, the second slot 12, the intersection point 13, the first feeding point 14, the second feeding point 15 and the reference ground 2 are the same as in the aforementioned FIG. 7 The first probe 41 and the second probe 42 are similar to those in the aforementioned FIG. 6 and will not be repeated here. A side of the radiation patch 1 facing away from the reference ground 2 may also be provided with a parasitic patch 5. A line L between the geometric center of the parasitic patch 5 and the geometric center of the radiation patch 1 is perpendicular to the radiation patch 1. By setting the parasitic patch 5, the working bandwidth of the antenna can be widened.

The size and shape of the parasitic patch 5 and the distance between the parasitic patch 5 and the radiation patch 1 can be determined by simulation and experiment according to the product performance requirements of the antenna, and this application is not limited thereto.

The parasitic patch 5 and the radiation patch 1 may be filled with gas, such as air, nitrogen, or the like. The parasitic patch 5 and the radiation patch 1 and between the radiation patch 1 and the reference ground 2 may be filled with the same or different gases, which is not limited in this application. In addition, a second dielectric layer may also be provided between the parasitic patch 5 and the radiation patch 1. The second dielectric layer is a non-gas material, such as a polytetrafluoroethylene layer. The second dielectric layer and the aforementioned first dielectric layer 3 may use the same or different non-gas materials, which is not limited in this application.

The second embodiment of the present application provides an encapsulated antenna (Antenna in Package, AiP). Please refer to FIG. 18, which is a schematic side view of an implementation manner of a packaged antenna. The packaged antenna includes a radiation patch 1, a reference ground 2, a first feeding path 43, a second feeding path 44, and a radio frequency chip 100. The radiation patch 1 is provided with a first slot and a second slot, the first slot and the second slot intersect perpendicularly, the first slot is symmetrical about the second slot, and the second slot is symmetrical about the first slot; the first slot and the second slot The intersection of the two grooves is located on the geometric center of the radiation patch 1; the radiation patch 1 is disposed on one side of the reference ground 2; one end of the first feeding path 43 is connected to the radiation patch 1 and the other end is connected to the radio frequency chip 100, The first feeding path 43 feeds the radiation patch 1 at the first feeding point; one end of the second feeding path 44 is connected to the radiation patch 1 and the other end is connected to the radio frequency chip 100, and the second feeding path 44 is at The second feeding point feeds the radiation patch 1; the vertically orthogonal first slot and the second slot divide the radiation patch 1 into four right-angle areas, and the first feeding point and the second feeding point are located in the phase Two adjacent right-angle areas.

A side of the radiation patch 1 facing away from the reference ground 2 may also be provided with a parasitic patch 5. The connection line between the geometric center of the parasitic patch 5 and the geometric center of the radiation patch 1 is perpendicular to the radiation patch 1.

The functions of the above first feeding path 43 and the second feeding path 44 are similar to those of the aforementioned first probe 41 and second probe 42, and are used to feed the signal emitted by the radio frequency chip 100 to the radiation patch 1. The first feeding path 43 and the second feeding path 44 can also have various specific implementation forms, such as metalized vias, metal pillars, and the like.

The package can use Ball Grid (BGA.) packaging technology, for example, plastic ball array (Plasric Ball Grid, PBGA), ceramic ball array (Ceramic Ball Grid Array, CBGA), ceramic column grid Array (Ceramic Column Grid Array, CCGA), tape ball array (Tape Ball Grid Array, TBGA), etc. As shown in FIG. 18, the other end of the first feeding path 43 and the other end of the second feeding path 44 are connected to the radio frequency chip 100 through a first solder ball 300. In addition, the second solder ball 400 serves as an input/output end of the circuit of the radio frequency chip 100 and can also be used to connect with a printed circuit board (Printed Circuit Board, PCB) 200.

For the radiation patch 1, the first slot, the second slot, the first feeding point, the second feeding point, and the parasitic patch 5, reference may be made to the related description in the foregoing first embodiment, and details are not described herein again. In addition, the radiation patch in the packaged antenna of this embodiment may also be provided with a current guiding slot, and the current guiding slot may also refer to the related description in the first embodiment, which will not be repeated here.

Part or all of the components of the antenna in the first embodiment are integrated with the radio frequency chip and packaged as a packaged antenna to facilitate miniaturization of the antenna.

In addition, this embodiment also provides a terminal device. Please refer to FIG. 19, which is a schematic structural diagram of an implementation manner of a terminal device. The terminal device includes a radio frequency signal processing circuit 600 and an antenna 500, wherein the radio frequency signal processing circuit 600 is used to process the received radio frequency signal or the radio frequency signal to be transmitted, and the antenna 500 is used to receive or transmit the radio frequency signal, and the antenna 500 may be the first The dual-polarized microstrip patch antenna of any one embodiment.

The RF signal processing circuit 600 may be connected to the other end of the first probe and the other end of the second probe in the antenna, respectively. When transmitting a signal, the radio frequency signal to be transmitted processed by the radio frequency signal processing circuit 600 is fed to the radiation patch of the antenna through the first probe or the second probe, and then emitted by the antenna. When receiving the signal, the antenna receives the radio frequency signal, and transmits the radio frequency signal to the radio frequency signal processing circuit 600 through the first probe or the second probe. Here, both the first probe and the second probe may be used to feed the radio frequency signal to be transmitted or the received radio frequency signal. Generally speaking, at the same time, one probe is used to feed the RF signal to be transmitted, and the other probe is used to transmit the received RF signal, so that the antenna can send and receive information at the same time , To achieve transceiver duplex.

Since the antenna in this embodiment may be any one of the antennas in the foregoing first embodiment, it accordingly has the same beneficial effects as the foregoing antenna, which will not be repeated here.

It should be understood that in the description of this application, the terms "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, just for the convenience of description This application and the simplified description do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the application.

It should also be understood that the terms “first” and “second” are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise specifically limited.

The same or similar parts between the embodiments in this specification can be referred to each other. In particular, for the embodiment of the packaged antenna and the terminal device, since it is basically similar to the embodiment of the dual-polarized microstrip patch antenna, the description is relatively simple. For the related parts, refer to the description in the method embodiment. The above-mentioned embodiments of the present invention do not constitute a limitation on the protection scope of the present invention.

Claims

A dual-polarized microstrip patch antenna, characterized in that the antenna includes a radiation patch, a reference ground, a first probe and a second probe, wherein:

The radiation patch is provided with a first groove and a second groove, the first groove and the second groove intersect perpendicularly, the first groove is symmetrical about the second groove, and the second groove is about The first groove is symmetrical; the intersection of the first groove and the second groove is located on the geometric center of the radiation patch;

The radiation patch is arranged on one side of the reference ground;

The first probe and the second probe are respectively connected to the radiation patch, the first probe feeds the radiation patch at a first feeding point, and the second probe is at The second feeding point feeds the radiation patch, and the vertically orthogonal first slot and the second slot divide the radiation patch into four right-angle areas, and the first feeding point and The second feeding point is located in two adjacent right-angle areas.
The antenna according to claim 1, wherein the line connecting the first feeding point and the geometric center of the radiation patch is a right angle bisector corresponding to the right-angle area where the first feeding point is located , The second feeding point and the first feeding point are symmetrical about the first slot or the second slot between them.
The antenna according to claim 1 or 2, wherein two ends of the first slot are respectively provided with current guiding slots, and the current guiding slot and the first slot at either end of the first slot The corresponding end of is intersected;

Current guide grooves are respectively provided at both ends of the second groove, and the current guide grooves located at any one end of the second groove intersect the corresponding end of the second groove.
The antenna according to claim 3, wherein the current guiding slot comprises a third sub-slot and a fourth sub-slot;

One end of the third sub-slot and one end of the fourth sub-slot intersect at either end of the first slot, and the third sub-slot and the fourth sub-slot are symmetrical about the first slot; or,

One end of the third sub-groove intersects one end of the fourth sub-groove at either end of the second groove, and the third sub-groove and the fourth sub-groove are symmetrical with respect to the second groove.
The antenna according to claim 4, wherein the angle formed by the intersection of the third sub-slot and the fourth sub-slot toward the geometric center is a right angle or an obtuse angle.
The antenna according to claim 3, wherein the current guiding groove is an arc-shaped groove, wherein:

When the arc-shaped groove is located at either end of the first groove, the arc-shaped groove is symmetrical about the first groove; or,

When the arc-shaped groove is located at either end of the second groove, the arc-shaped groove is symmetrical with respect to the second groove.
The antenna according to any one of claims 1-6, wherein a first dielectric layer is provided between the radiation patch and the reference ground, and the first slot and the second slot are filled Insulating material, the insulating material is the same as the material of the first dielectric layer.
The antenna according to any one of claims 1-7, wherein the lengths of the first slot and the second slot are equal.
The antenna according to any one of claims 1-8, wherein the shape of the radiation patch is a square, and the centerline of the first slot is substantially a diagonal line of the square, and the first The center line of the two grooves is substantially another diagonal line of the square, the extension direction of the center line of the first groove is the same as the length direction of the first groove, and the extension direction of the center line of the second groove It is the same as the length direction of the second groove.
The antenna according to any one of claims 1 to 9, wherein the polarization directions of the microwave signal fed to the first feeding point and the microwave signal fed to the second feeding point are perpendicular to each other.
The antenna according to any one of claims 1-10, wherein a parasitic patch is provided on a side of the radiation patch facing away from the reference ground, and the geometric center of the parasitic patch is The line of the geometric center of the patch is perpendicular to the radiation patch.
A packaged antenna, characterized in that the packaged antenna includes a radiation patch, a reference ground, a first feeding path, a second feeding path and a radio frequency chip, wherein:

The radiation patch is provided with a first groove and a second groove, the first groove and the second groove intersect perpendicularly, the first groove is symmetrical about the second groove, and the second groove is about The first groove is symmetrical; the intersection of the first groove and the second groove is located on the geometric center of the radiation patch;

The radiation patch is arranged on one side of the reference ground;

One end of the first feeding path is connected to the radiation patch and the other end is connected to the radio frequency chip, and the first feeding path feeds the radiation patch at a first feeding point;

One end of the second feeding path is connected to the radiation patch, and the other end is connected to the radio frequency chip, and the second feeding path feeds the radiation patch at a second feeding point;

The vertically orthogonal first groove and the second groove divide the radiation patch into four right-angle areas, and the first feeding point and the second feeding point are located in two adjacent Right angle area.
The antenna according to claim 12, wherein the line connecting the first feeding point and the geometric center of the radiation patch is a right angle bisector corresponding to the right-angle area where the first feeding point is located , The second feeding point and the first feeding point are symmetrical about the first slot or the second slot between them.
The antenna according to claim 12 or 13, wherein two ends of the first slot are respectively provided with current guiding slots, and the current guiding slot and the first slot at either end of the first slot The corresponding end of is intersected;

Current guide grooves are respectively provided at both ends of the second groove, and the current guide grooves located at any one end of the second groove intersect the corresponding end of the second groove.
The antenna according to claim 14, wherein the current guiding slot comprises a third sub-slot and a fourth sub-slot;

One end of the third sub-slot and one end of the fourth sub-slot intersect at either end of the first slot, and the third sub-slot and the fourth sub-slot are symmetrical about the first slot; or,

One end of the third sub-groove intersects one end of the fourth sub-groove at either end of the second groove, and the third sub-groove and the fourth sub-groove are symmetrical with respect to the second groove.
The antenna according to claim 15, wherein the angle formed by the intersection of the third sub-slot and the fourth sub-slot facing the geometric center is a right angle or an obtuse angle.
The antenna according to claim 14, wherein the current guiding groove is an arc-shaped groove;

When the arc-shaped groove is located at either end of the first groove, the arc-shaped groove is symmetrical about the first groove; or,

When the arc-shaped groove is located at either end of the second groove, the arc-shaped groove is symmetrical with respect to the second groove.
A terminal device is characterized by comprising a radio frequency signal processing circuit and an antenna, wherein the radio frequency signal processing circuit is used to process a received radio frequency signal or a radio frequency signal to be transmitted, and the antenna is used to receive or transmit the radio frequency Signal, the antenna is the dual-polarized microstrip patch antenna of any one of claims 1-11.