WO2024040562A1

WO2024040562A1 - Wearable antenna and electronic device

Info

Publication number: WO2024040562A1
Application number: PCT/CN2022/115078
Authority: WO
Inventors: 卢志鹏; 范西超; 任亚洲; 于孟夏; 王亚丽; 曲峰
Original assignee: 京东方科技集团股份有限公司
Priority date: 2022-08-26
Filing date: 2022-08-26
Publication date: 2024-02-29

Abstract

A wearable antenna, comprising: a dielectric substrate (10), and a radiation layer (12) and a grounding layer (11) which are located on two opposite sides of the dielectric substrate (10). The radiation layer (12) comprises: an annular patch (121) and a plurality of bar-shaped patches (122) located on the inner side of the annular patch (121). At least one through hole (100) running through the dielectric substrate (10) and the grounding layer (11) is formed in the wearable antenna. The at least one through hole (100) is located on the inner side of the annular patch (121) and is configured to be integrated with a wearable article. The orthographic projection of the at least one through hole (100) on the dielectric substrate (10) does not overlap the orthographic projection of the radiation layer (12) on the dielectric substrate (10).

Description

Wearable antennas and electronic devices

Technical field

This article relates to but is not limited to the field of communication technology, especially a wearable antenna and electronic device.

Background technique

With the development of wireless network technology, industries such as medical and health monitoring and the Internet of Things (IOT) have developed rapidly. Antennas are essential components for receiving and transmitting data in wireless networks, and wearable antennas are an important research direction.

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

Embodiments of the present disclosure provide a wearable antenna and electronic device.

In one aspect, embodiments of the present disclosure provide a wearable antenna, including: a dielectric substrate, and a radiation layer and a ground layer located on opposite sides of the dielectric substrate. The radiation layer includes: an annular patch and a plurality of strip patches located inside the annular patch. The wearable antenna has at least one through hole penetrating the dielectric substrate and the ground layer. The at least one through hole is located inside the annular patch and is configured to be integrated with a wearable object. The orthographic projection of the at least one through hole on the dielectric substrate does not overlap with the orthographic projection of the radiation layer on the dielectric substrate.

In some exemplary embodiments, the annular patch is connected to the plurality of strip patches, and the plurality of strip patches divide the inner area of the annular patch into a plurality of sub-regions, at least one sub-region. The area must have at least one through hole.

In some exemplary embodiments, the annular patch and the plurality of strip patches are an integral structure.

In some exemplary embodiments, the center of the radiating layer coincides with the center of the dielectric substrate.

In some exemplary embodiments, each of the plurality of strip-shaped patches has a first end and a second end, the first ends of the plurality of strip-shaped patches are connected together, and a third end of at least one strip-shaped patch is connected together. The two ends are connected to the annular patches; the angles between adjacent strip patches are the same.

In some exemplary embodiments, the number of strip-shaped patches is N, and the annular patch is divided into M sub-patches by M slots, N is an integer greater than 1, and M is less than or equal to N. integer.

In some exemplary embodiments, M is equal to N, the M sub-patches and N strip-shaped patches are connected in a one-to-one correspondence, and the slot is adjacent to the connection position of one strip-shaped patch and the sub-patches.

In some exemplary embodiments, N is 3 or 4.

In some exemplary embodiments, M is less than N; N strip-shaped patches are all connected to the ring-shaped patches, and at least one sub-patch is connected to at least two strip-shaped patches.

In some exemplary embodiments, M is 2 and N is 4.

In some exemplary embodiments, a second end of at least one strip patch extends into the slot.

In some exemplary embodiments, the wearable antenna has a first center line passing through a center of the dielectric substrate and a feed position, and the M slots are located on opposite sides of the first center line and are about the The first center line is roughly symmetrical.

In some exemplary embodiments, the wearable antenna has a first center line passing through a center of the dielectric substrate and a feed position, and a second center line passing through the center of the dielectric substrate and perpendicular to the first center line. ; The M sub-patches are located on opposite sides of the second midline and are generally symmetrical about the second midline.

In some exemplary embodiments, the annular patch is a closed annular shape, and the number of strip patches is three.

In some exemplary embodiments, the wearable antenna further includes: a feed structure; the feed structure is connected to the ground layer, and is connected to the radiation layer through the ground layer and the dielectric substrate, and The center of the feed structure and the center of the radiation layer do not coincide with each other.

On the other hand, embodiments of the present disclosure provide an electronic device including the wearable antenna as described above.

Other aspects will be apparent after reading and understanding the drawings and detailed description.

Description of drawings

The drawings are used to provide a further understanding of the technical solution of the present disclosure, and constitute a part of the specification. They are used to explain the technical solution of the present disclosure together with the embodiments of the present disclosure, and do not constitute a limitation of the technical solution of the present disclosure. The shape and size of one or more components in the drawings do not reflect true proportions and are intended only to illustrate the present disclosure.

Figure 1 is a schematic plan view of a wearable antenna according to at least one embodiment of the present disclosure;

Figure 2 is a partial cross-sectional schematic diagram along the Q-Q’ direction in Figure 1;

Figures 3A to 3C show the HFSS simulation results of the wearable antenna shown in Figure 1;

Figure 4 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure;

Figures 5A to 5C show the HFSS simulation results of the wearable antenna shown in Figure 4;

Figure 6 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure;

Figures 7A to 7C show the HFSS simulation results of the wearable antenna shown in Figure 6;

Figure 8 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure;

Figures 9A to 9C show the HFSS simulation results of the wearable antenna shown in Figure 8;

Figure 10 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure;

Figures 11A to 11C show the HFSS simulation results of the wearable antenna shown in Figure 10;

Figure 12 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure;

Figures 13A to 13E show the HFSS simulation results of the wearable antenna shown in Figure 12;

FIG. 14 is a schematic diagram of an electronic device according to at least one embodiment of the present disclosure.

Detailed ways

The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Embodiments may be implemented in many different forms. Those of ordinary skill in the art can easily appreciate the fact that the manner and content can be changed into other forms without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure should not be construed as being limited only to the contents described in the following embodiments. The embodiments and features in the embodiments may be arbitrarily combined with each other without conflict.

In the drawings, the size of one or more constituent elements, the thickness of a layer, or an area are sometimes exaggerated for clarity. Accordingly, one aspect of the present disclosure is not necessarily limited to such dimensions, and the shape and size of one or more components in the drawings do not reflect true proportions. In addition, the drawings schematically show ideal examples, and one aspect of the present disclosure is not limited to shapes, numerical values, etc. shown in the drawings.

Ordinal numbers such as "first", "second" and "third" in this specification are provided to avoid confusion of constituent elements and are not intended to limit the quantity. "A plurality" in this disclosure means a quantity of two or more.

In this manual, for convenience, "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner" are used , "outside" and other words indicating the orientation or positional relationship are used to illustrate the positional relationship of the constituent elements with reference to the drawings. They are only for the convenience of describing this specification and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation. , are constructed and operate in specific orientations and therefore should not be construed as limitations on the disclosure. The positional relationship of the constituent elements is appropriately changed depending on the direction of the described constituent elements. Therefore, they are not limited to the words and phrases described in the specification, and may be appropriately replaced according to circumstances.

In this manual, unless otherwise expressly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or a connection; it can be a direct connection, an indirect connection through an intermediate piece, or an internal connection between two elements. For those of ordinary skill in the art, the meanings of the above terms in this disclosure can be understood according to the circumstances.

In this specification, "electrical connection" includes a case where constituent elements are connected together through an element having some electrical effect. There is no particular limitation on the "element having some electrical function" as long as it can transmit electrical signals between connected components. Examples of "elements with some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements with multiple functions.

In this specification, "parallel" refers to a state in which the angle formed by two straight lines is -10° or more and 10° or less. Therefore, it also includes a state in which the angle is -5° or more and 5° or less. In addition, "vertical" refers to a state where the angle formed by two straight lines is 80° or more and 100° or less, and therefore includes an angle of 85° or more and 95° or less.

In this specification, triangles, rectangles, trapezoids, pentagons or hexagons are not strictly defined. They can be approximate triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small differences caused by tolerances. Deformation can include leading angles, arc edges, deformation, etc.

"About" and "approximately" in this disclosure refer to situations where the limits are not strictly limited and are within the allowable range of process and measurement errors. In the present disclosure, "substantially the same" refers to the case where the values differ within 10%.

In this disclosure, A extending along direction B means that A may include a main part and a secondary part connected to the main part, the main part is a line, line segment or bar-shaped body, the main part extends along direction B, and the main part The length of the portion extending along direction B is greater than the length of the minor portion extending along the other directions. In the following description, "A extends along direction B" means "the main body part of A extends along direction B".

In some implementations, wearable antennas can be divided into flexible antennas and non-flexible antennas. Most flexible antennas use woven fabrics such as denim or other flexible materials as the base. Flexible antennas are more flexible in use, but flexible designs have some drawbacks. For example, the bending of the flexible substrate caused by body movement and the influence of temperature will cause changes in antenna performance. Although the performance of non-flexible antennas is more stable, it may affect the wearing comfort of the human body and limit user activities.

At least one embodiment of the present disclosure provides a wearable antenna, including: a dielectric substrate, a radiation layer and a ground layer located on opposite sides of the dielectric substrate. The radiation layer includes: an annular patch and a plurality of strip patches located inside the annular patch. The wearable antenna has at least one through hole penetrating the dielectric substrate and the ground layer. The at least one through hole is located inside the annular patch and is configured to be integrated with the wearable object. The orthographic projection of the at least one through hole on the dielectric substrate does not overlap with the orthographic projection of the radiation layer on the dielectric substrate.

The wearable antenna provided in this embodiment has the advantages of low profile, small size, compact and simple structure, and easy preparation. Moreover, the wearable antenna provided by this embodiment is easy to integrate into wearable objects (such as clothes, buttons, etc.), causes less interference to users, and can maintain stable antenna performance.

In some examples, the wearable object may be clothes, pants, hats, gloves, socks, shoes, etc. The wearable antenna of this example can be prepared in a button-like shape, or can be provided inside the button and fixed on the wearable object through the at least one through hole.

In some exemplary embodiments, the annular patch of the radiating layer and multiple strip patches can be connected, and the multiple strip patches can separate the inner area of the annular patch into multiple sub-regions, and at least one sub-region can be provided At least one through hole. For example, a through hole can be set in each sub-area, or through holes can be set in some sub-areas. In some examples, three strip-shaped patches can separate the inner area of the annular patch into three sub-areas, and a through hole is provided in each sub-area; or, four strip-shaped patches can separate the inner area of the annular patch. Divide it into four sub-areas and set a through hole in each sub-area. This example facilitates the realization of the wearable function of the wearable antenna by configuring a through hole for integrating the wearable object. Moreover, the size of the wearable antenna in this example is smaller, which can reduce interference to the user.

In some exemplary embodiments, the annular patch and the plurality of strip patches may be an integral structure. The radiation layer in this example adopts a sheet structure, which can reduce the overall thickness of the wearable antenna and achieve low profile and small size.

The wearable antenna of this embodiment is illustrated below through multiple examples.

FIG. 1 is a schematic plan view of a wearable antenna according to at least one embodiment of the present disclosure. Figure 2 is a partial cross-sectional view along the Q-Q’ direction in Figure 1. In some examples, as shown in Figures 1 and 2, the wearable antenna of this example may include: a dielectric substrate 10, a radiation layer 12 and a ground layer 11 located on opposite sides of the dielectric substrate 10, and a connection between the radiation layer 12 and the ground layer. Feed structure 13 of layer 11.

In some examples, as shown in Figure 1, the wearable antenna may be generally cylindrical. For example, the overall thickness of the wearable antenna may be approximately 1.4 millimeters (mm) to 1.8 mm, such as approximately 1.6 mm. The top view shape of the dielectric substrate 10 and the ground layer 11 may be circular or elliptical.

In some examples, the dielectric substrate 10 may be a flexible substrate. For example, the material of the dielectric substrate 10 may be FR-4 (epoxy resin board) material. The radiation layer 12 and the ground layer 11 may be formed on the dielectric substrate 10 through a circuit board preparation process. The radiation layer 12 and the ground layer 13 may be made of metal materials, such as copper (Cu) or silver (Ag). However, this embodiment is not limited to this. The dielectric substrate 10 in this example is made of flexible material, which can increase flexibility during use.

In some examples, as shown in FIG. 1 , the center O of the radiation layer 12 and the center of the dielectric substrate 10 may substantially coincide. However, this embodiment is not limited to this. For example, there may be a certain offset between the center of the radiation layer and the center of the dielectric substrate.

In some examples, as shown in FIGS. 1 and 2 , the center of the feed structure 13 and the center line O of the radiation layer 12 may not coincide with each other. Feed structure 13 may include coaxial feed lines. The coaxial feeder may include an inner conductor and an outer conductor located outside the inner conductor. The inner conductor and outer conductor may be isolated by a dielectric material. The outer conductor of the coaxial feed line can be connected to the ground layer 11 , and the inner conductor can be connected to the radiation layer 12 . For example, the inner conductor can be connected to the radiation layer 12 from the dielectric substrate 10 side through an opening penetrating the dielectric substrate 10 and the ground layer 11 . The orthographic projections of the inner conductor and the outer conductor on the dielectric substrate 10 may be concentric circles, and the radius of the orthographic projection of the outer conductor may be larger than the radius of the orthographic projection of the inner conductor. In some examples, the feed structure 13 may also be connected to a radio frequency connector, and the radio frequency connection line may be configured to connect an external radio frequency signal. The radio frequency connector may be located on a side of the ground layer 11 away from the dielectric substrate 10 . This example uses coaxial feeding to feed the radiation layer. There is no complicated feeding structure. The structure is simple and easy to prepare.

In some examples, as shown in FIG. 1 , the radiation layer 12 may include: an annular patch 121 and three strip patches 122 located inside the annular patch 121 . The annular patch 121 and the three strip patches 122 may be connected to each other and may have an integrated structure. The annular patch 121 may be in the shape of a non-closed annular ring. The annular patch 121 can be divided into three sub-patches 1211 by three slots 120 . In this example, the number N of strip patches is 3, and the number M of slots and sub-patches is both 3.

In some examples, as shown in Figure 1, the three sub-patches 1211 may be approximately the same shape and size. For example, the sub-tile 1211 may be a curved patch. The three strip patches 122 may be approximately the same shape and size. For example, strip patch 122 may be generally rectangular. Each strip patch 122 may have a first end and a second end. The first ends of the three strip patches 122 can be connected together, and the second end of each strip patch 122 can be connected to one sub- patch 1211 . In other words, three strip patches 122 and three sub-patches 1211 can be connected in a one-to-one correspondence. The first ends of the three strip-shaped patches 122 are connected together to form a common connection end, and the center of the common connection end can coincide with the center O of the radiation layer 12 . The orthographic projection of the three connected strip-shaped patches 122 on the dielectric substrate 10 may be approximately Y-shaped. The included angle between two adjacent strip patches 122 may be approximately the same.

In some examples, as shown in FIG. 1 , a slot 120 is provided between two adjacent sub-patches 1211 . The slot 120 is adjacent to the connection position of one sub-pattern 1211 and the strip-shaped patch 122 . Sub-patch 1211 may have third and fourth ends. The fourth end of the sub-patch 1211 may be connected to the second end of a strip-shaped patch 122. The slot 120 may be located between the third end of one sub-pad 1211 and the fourth end of the other sub-pad 1211 . For example, the sub-patches 1211, the slots 120 and the strip-shaped patches 122 may be arranged sequentially in a clockwise direction.

In some examples, as shown in Figure 1, three strip patches 122 can separate the inner area of the annular patch 121 into three sub-areas. Each sub-region may be surrounded by two adjacent strip-shaped patches 122 and one sub- patch 1211. The shape of the sub-regions may be roughly fan-shaped. A through hole 100 is provided in each sub-area. The orthographic projection of the through hole 100 on the dielectric substrate 10 does not overlap with the orthographic projection of the radiation layer 12 on the dielectric substrate 10 . The through hole 100 may penetrate the dielectric substrate 10 and the ground layer 11 . The distance between two adjacent through holes 100 may be approximately the same. For example, the three through holes 100 may be located at three vertex corners of an equilateral triangle centered on the radiation layer center O.

In some examples, as shown in FIG. 1 , the orthographic projection of the through hole 100 on the dielectric substrate 10 may be circular. However, this embodiment is not limited to this. For example, the orthographic projection of the through hole on the dielectric substrate may be an ellipse, a quadrilateral, a pentagon, a hexagon, or other shapes. The through hole 100 in this example does not affect the performance of the wearable antenna, and can realize the wearable function while ensuring the performance of the antenna.

In some examples, as shown in FIG. 1 , one of the three strip patches 122 may extend along the first direction X. The orthographic projection of the strip patch 122 and the feed structure 13 on the dielectric substrate 10 may overlap. The remaining two strip patches 122 may be generally symmetrical about the strip patch 122 . In this example, the second direction Y and the first direction X may be located on the same plane and perpendicular to each other. The third direction Z may be perpendicular to the plane where the first direction X and the second direction Y are located. In this example, thickness can represent the length along the third direction Z.

Figures 3A to 3C show the three-dimensional electromagnetic simulation software (HFSS, High Frequency Structure Simulator) simulation results of the wearable antenna shown in Figure 1. Figure 3A is a simulation result diagram of the S11 curve of the wearable antenna shown in Figure 1. Figure 3B is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 1. FIG. 3C is the E-plane radiation pattern of the wearable antenna shown in FIG. 1 . Among them, the E surface is also called the electric surface, which refers to the plane parallel to the direction of the electric field. The azimuth angle Phi refers to the angle in the azimuth plane (horizontal plane, that is, the XOY plane where the first direction X and the second direction Y are located), ranging from 0 to 360 degrees; the pitch angle Theta refers to the pitch plane (vertical plane, that is, the second The angle between the direction Y and the third direction Z in the YOZ plane), ranging from 0 to 180 degrees. In Figure 3C, L11 is all the gain (Gain Total) curves of the XOZ plane; L12 is all the gain curves of the YOZ plane.

In some examples, as shown in FIG. 1 , the diameter D1 of the dielectric substrate 10 and the ground layer may be approximately 20 mm. The outer ring radius R1 of the annular patch 12 may be approximately 8.6 mm, and the inner ring radius R2 may be approximately 6.1 mm. The width W1 of the strip patch 122 may be approximately 1.4 mm. The angle A1 between adjacent strip patches 122 may be approximately 120 degrees. The width W2 of the slot 120 may be approximately 2.5 mm. The distance H1 between the feed center of the feed structure 13 and the center O of the radiation layer 12 may be approximately 2 mm. The diameter of the coaxial feed lines of the feed structure 13 may be approximately 1.2 mm. The distance H2 between the center of the through hole 100 and the center O of the radiation layer 12 may be approximately 3 mm. The diameter of the through hole 100 may be approximately 1.6 mm.

In some examples, as shown in Figure 3A, the -10dB impedance bandwidth of the wearable antenna can be approximately 270MHz (5.94GHz to 6.21GHz) and the center frequency can be approximately 6.08GHz. Figures 3B and 3C show the long-range radiation gain diagram and E-plane radiation pattern of the wearable antenna shown in Figure 1 at a frequency of 6.0GHz. As shown in Figure 3B and Figure 3C, the maximum gain of the wearable antenna can be approximately 4.2dB at a frequency of 6.0GHz.

The wearable antenna provided in this example has the advantages of low profile, small size, compact and simple structure, and easy preparation. Moreover, through the shape design of the radiation layer and the position design of the feed structure, the antenna performance can be kept stable. The through-hole design makes it easy to wear and causes less interference to the user.

FIG. 4 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure. In some examples, as shown in FIG. 4 , the radiation layer 12 may include: an annular patch 121 and four strip patches 122 located inside the annular patch 121 and connected to the annular patch 121 . The annular patch 121 and the four strip patches 122 may have an integrated structure. The annular patch 121 may be in the shape of a non-closed annular ring. The annular patch 121 can be divided into four sub-patches 1211 by four slots 120 . In this example, the number N of strip tiles is 4, and the number M of slots and sub-patches is 4.

In some examples, as shown in FIG. 4 , the shape and size of the four sub-patches 1211 may be approximately the same, for example, they may be quarter-arc-shaped patches. The four strip patches 122 may be approximately the same shape and size. For example, strip patch 122 may be generally rectangular. Each strip patch 122 may have a first end and a second end. The first ends of the four strip-shaped patches 122 may be connected together, and the second end of each strip-shaped patch 122 may be connected to one sub- patch 1211 . In other words, four strip patches 122 and four sub-patches 1211 can be connected in a one-to-one correspondence. The first ends of the four strip-shaped patches 122 are connected together to form a common connection end, and the center of the common connection end can coincide with the center O of the radiation layer 12 . The orthographic projection of the connected four strip-shaped patches 122 on the dielectric substrate 10 may be a cross shape. The included angle between two adjacent strip patches 122 may be approximately the same. For example, the angle A2 between two adjacent strip patches 122 may be approximately 90 degrees. For example, two strip-shaped patches 122 may extend along the first direction X, and the other two strip-shaped patches 122 may extend along the second direction Y.

In some examples, as shown in Figure 4, four strip patches 122 may separate the inner area of the annular patch 121 into four sub-areas. Each sub-region may be surrounded by two adjacent strip-shaped patches 122 and one sub- patch 1211. The shape of the sub-region can be roughly a quarter circle. One through hole 100 can be provided in each sub-area. The distance between two adjacent through holes 100 may be approximately the same. For example, the four through holes 100 may be located at the four vertex corners of a square centered on the center O of the radiation layer 12 .

In some examples, as shown in Figure 4, the width of slot 120 may be W3. The width of the slot 120 in this example may be smaller than the width W2 of the slot of the wearable antenna shown in FIG. 1 . Regarding the remaining structure and parameters of the wearable antenna of this embodiment, reference can be made to the description of the wearable antenna shown in FIG. 1 , and therefore will not be described again here.

Figures 5A to 5C show the HFSS simulation results of the wearable antenna shown in Figure 4. FIG. 5A is a simulation result diagram of the S11 curve of the wearable antenna shown in FIG. 4 . Figure 5B is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 4 at a frequency of 6.9GHz. Figure 5C is the E-plane radiation pattern of the wearable antenna shown in Figure 4 at a frequency of 6.9GHz. In Figure 5C, L21 is all the gain curves of the XOZ plane; L22 is all the gain curves of the YOZ plane.

In some examples, as shown in Figure 5A, the -10dB impedance bandwidth of the wearable antenna can be approximately 810MHz (6.65GHz to 7.46GHz) and the center frequency can be approximately 6.92GHz. As shown in Figure 5B and Figure 5C, at a frequency of 6.9GHz, the maximum gain of the wearable antenna can be approximately 5.11dB.

The wearable antenna provided in this example has the advantages of low profile, small size, compact and simple structure, and easy preparation. It is easy to wear, causes less interference to users, and can maintain stable antenna performance.

FIG. 6 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure. In some examples, as shown in FIG. 6 , the radiation layer 12 may include: an annular patch 121 and four strip patches 122 located inside the annular patch 121 . The annular patch 121 may be in the shape of a non-closed annular ring. The annular patch 121 can be divided into two sub-patches 1211 by two slots 120 . In this example, the number N of strip patches is 4, and the number M of slots and sub-patches is 2.

In some examples, as shown in FIG. 6 , the shape and size of the two sub-patches 1211 can be approximately the same, for example, they can be semi-circular arc-shaped patches. Two of the four strip patches 122 may extend along the first direction X, and the other two may extend along the second direction Y. The shape of the four strip patches 122 may be approximately the same, for example, rectangular, and may have different sizes. For example, the size of the two strip-shaped patches 122 extending along the second direction Y may be larger than the size of the two strip-shaped patches 122 extending along the first direction X. Each strip patch 122 may have a first end and a second end. The first ends of the four strip patches 122 may be connected together, and the second ends of the two strip patches 122 extending along the first direction The second ends of the two extended strip patches 122 can extend into the slot 120 and be located in the middle of the slot 120 . The first ends of the four strip-shaped patches 122 are connected together to form a common connection end, and the center of the common connection end can coincide with the center O of the radiation layer 12 . The orthographic projection of the connected four strip-shaped patches 122 on the dielectric substrate 10 may be a cross shape. The included angle between two adjacent strip-shaped patches 122 may be approximately the same. For example, the included angle A3 between two adjacent strip-shaped patches 122 may be approximately 90 degrees.

In some examples, as shown in Figure 6, the wearable antenna may have a first center line P1 and a second center line P2. The first center line P1 may pass through the center O of the radiation layer 12 and the corresponding feed position of the feed structure 13, and be parallel to the first direction X; the second center line P2 may pass through the center O, and be parallel to the second direction Y. The first center line P1 may be perpendicular to the second center line P2. The radiation layer 12 may be substantially symmetrical about the first center line P1 and may also be substantially symmetrical about the second center line P2. The two sub-patches 1211 may be approximately symmetrical about the second center line P2, and the two slots 120 may be located on opposite sides of the first center line P1, and may be approximately symmetrical about the first center line P1. The feed structure 13 may be connected to a strip patch 122 extending along the first direction X.

In some examples, as shown in FIG. 6 , the difference between the outer ring radius R3 and the inner ring radius R4 of the annular patch 12 may be greater than the outer ring radius R1 and the inner ring radius R4 of the annular patch of the wearable antenna shown in FIG. 1 The difference between the inner ring radius R2. The width W4 of the slot 120 may be greater than the width W2 of the slot of the wearable antenna shown in FIG. 1 . The distance between the sub-pattern 1211 and the strip-shaped patch 122 extending into the slot 120 is W5. W4 can be twice as large as W5.

For the rest of the structure and parameters of the wearable antenna of this embodiment, reference can be made to the description of the wearable antenna shown in FIG. 2 , and therefore will not be described again here.

Figures 7A to 7C show the HFSS simulation results of the wearable antenna shown in Figure 6. FIG. 7A is a simulation result diagram of the S11 curve of the wearable antenna shown in FIG. 6 . Figure 7B is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 6 at a frequency of 8.4GHz. Figure 7C is the E-plane radiation pattern of the wearable antenna shown in Figure 6 at a frequency of 8.4GHz. In Figure 7C, L31 is all the gain curves of the XOZ plane; L32 is all the gain curves of the YOZ plane.

In some examples, as shown in Figure 7A, the -10dB impedance bandwidth of the wearable antenna can be approximately 640MHz (8.19GHz to 8.83GHz), and the center frequency can be approximately 8.44GHz. As shown in Figure 7B and Figure 7C, at a frequency of 8.4GHz, the maximum gain of the wearable antenna can be approximately 5.11dB.

FIG. 8 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure. In some examples, as shown in FIG. 8 , the radiation layer 12 may include: an annular patch 121 and four strip patches 122 located inside the annular patch 121 . The annular patch 121 may be in the shape of a non-closed annular ring. The annular patch 121 can be divided into two sub-patches 1211 by two slots 120 . In this example, the number N of strip patches is 4, and the number M of slots and sub-patches is 2.

In some examples, as shown in FIG. 8 , two strip patches 122 extending along the second direction Y are connected to corresponding sub-patches 1211 , and the second strip patch 122 extending along the first direction X is connected to the corresponding sub-patches 1211 . The two ends can extend into the slot 120 . The two sub-patches 1211 may be approximately symmetrical about the first center line P1, and the two slots 120 may be approximately symmetrical about the second center line P2. The feed structure 13 may be connected to a strip patch 122 extending along the first direction X. Compared with the wearable antenna shown in FIG. 6 , the position of the slot 120 of the radiation layer 12 of the wearable antenna in this example is changed relative to the position of the feed structure 13 . For the rest of the structure and parameters of the wearable antenna of this embodiment, reference can be made to the description of the wearable antenna shown in FIG. 6 , and therefore will not be described again here.

Figures 9A to 9C show the HFSS simulation results of the wearable antenna shown in Figure 8. FIG. 9A is a simulation result diagram of the S11 curve of the wearable antenna shown in FIG. 8 . Figure 9B is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 8 at a frequency of 8.8GHz. Figure 9C is the E-plane radiation pattern of the wearable antenna shown in Figure 8 at a frequency of 8.8GHz. In Figure 9C, L41 is all the gain curves of the XOZ plane; L42 is all the gain curves of the YOZ plane.

In some examples, as shown in Figure 9A, the -10dB impedance bandwidth of the wearable antenna can be approximately 280MHz (8.66GHz to 8.94GHz), and the center frequency can be approximately 8.80GHz. As shown in Figure 9B and Figure 9C, at a frequency of 8.8GHz, the maximum gain of the wearable antenna can be approximately 1.4dB.

FIG. 10 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure. In some examples, as shown in FIG. 10 , the radiation layer 12 may include: an annular patch 121 and four strip patches 122 located inside the annular patch 121 . The annular patch 121 may be in the shape of a non-closed annular ring. The annular patch 121 can be divided into two sub-patches 1211 by two slots 120. In this example, the number N of strip patches is 4, and the number M of slots and sub-patches is 2.

In some examples, as shown in FIG. 10 , each sub-patch 1211 is connected to one strip-shaped patch 122 extending along the first direction X and one strip-shaped patch 122 extending along the second direction Y. The slot 120 may be adjacent to a connection position of the strip patch 122 and the sub- patch 1211 extending along the second direction Y. For the rest of the structure and parameters of the wearable antenna of this embodiment, reference can be made to the description of the wearable antenna shown in FIG. 4 , and therefore will not be described again here.

Figures 11A to 11C show the HFSS simulation results of the wearable antenna shown in Figure 10. FIG. 11A is a simulation result diagram of the S11 curve shown in FIG. 10 . Figure 11B is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 10 at a frequency of 10.3GHz. Figure 11C is the E-plane radiation pattern of the wearable antenna shown in Figure 10 at a frequency of 10.3GHz. In Figure 11C, L51 is all the gain curves of the XOZ plane; L52 is all the gain curves of the YOZ plane.

In some examples, as shown in Figure 11A, the -10dB impedance bandwidth of the wearable antenna may be approximately 380MHz (10.08GHz to 10.46GHz) and the center frequency may be approximately 10.3GHz. As shown in Figure 11B and Figure 11C, the maximum gain of the wearable antenna can be approximately 2.6dB at a frequency of 10.3GHz.

Figure 12 is another plan view of a wearable antenna according to at least one embodiment of the present disclosure. In some examples, as shown in FIG. 12 , the radiation layer 12 may include: an annular patch 121 and three strip patches 122 located inside the annular patch 121 . The annular patch 121 may be in the shape of a closed ring, for example, may be in the shape of a closed circular ring. The annular patch 121 is connected to the three strip patches 122 and may have an integrated structure. The included angle between two adjacent strip patches 122 may be the same, for example, may be approximately 120 degrees. Regarding the remaining structure and parameters of the wearable antenna of this embodiment, reference can be made to the description of the wearable antenna shown in FIG. 1 , and therefore will not be described again here.

Figures 13A to 13E show the HFSS simulation results of the wearable antenna shown in Figure 12. FIG. 13A is a simulation result diagram of the S11 curve shown in FIG. 12 . Figure 13B is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 12 at a frequency of 18.3GHz. Figure 13C is the E-plane radiation pattern of the wearable antenna shown in Figure 12 at a frequency of 18.3GHz. Figure 13D is a long-range 3D radiation gain diagram of the wearable antenna shown in Figure 12 at a frequency of 22.0GHz. Figure 13E is the E-plane radiation pattern of the wearable antenna shown in Figure 12 at a frequency of 22.0GHz. In Figure 13C, L61 is all the gain curves of the XOZ plane; L62 is all the gain curves of the YOZ plane. In Figure 13E, L63 is all the gain curves of the XOZ plane; L64 is all the gain curves of the YOZ plane.

In some examples, as shown in Figure 13A, the wearable antenna can have two main radiation frequency points, 18.3GHz and 22.0GHz, respectively, and the corresponding -10dB impedance bandwidths are 1.98GHz (17.25GHz to 19.23GHz) and 1.34 GHz (21.38GHz to 22.72GHz). As shown in Figure 13B and Figure 13C, when the frequency is 18.3GHz, the maximum gain of the wearable antenna can be about 6.0dB; when the frequency is 22.0GHz, the maximum gain of the wearable antenna can be about 4.54dB.

The wearable antenna provided in the above embodiments can ensure the overall performance of the antenna by designing the shape of the radiation patch and the position of the feed structure within a limited size area, thereby making it easy to wear and causing less interference to the user. And a wearable antenna with stable performance.

FIG. 14 is a schematic diagram of an electronic device according to at least one embodiment of the present disclosure. In some examples, as shown in FIG. 14 , this embodiment provides an electronic device 91 including: a portable antenna 910 . The electronic device 91 may be a portable or wearable product or component with communication functions in the fields of medical health monitoring, sports test analysis, tracking and positioning, etc. However, this embodiment is not limited to this.

The drawings in this disclosure only refer to the structures involved in this disclosure, and other structures may refer to common designs. If there is no conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other to obtain new embodiments. Those of ordinary skill in the art should understand that the technical solutions of the present disclosure can be modified or equivalently substituted without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be covered by the scope of the claims of the present disclosure.

Claims

A wearable antenna including:

A dielectric substrate, a radiation layer and a ground layer located on opposite sides of the dielectric substrate;

The radiation layer includes: an annular patch and a plurality of strip patches located inside the annular patch;

The wearable antenna has at least one through hole penetrating the dielectric substrate and the ground layer, the at least one through hole is located inside the annular patch and is configured to be integrated with the wearable object;

The orthographic projection of the at least one through hole on the dielectric substrate does not overlap with the orthographic projection of the radiation layer on the dielectric substrate.
The wearable antenna according to claim 1, wherein the annular patch is connected to the plurality of strip patches, and the plurality of strip patches separate an inner area of the annular patch into a plurality of sub-sections. area, at least one sub-area is provided with at least one through hole.
The wearable antenna according to claim 1 or 2, wherein the annular patch and the plurality of strip patches are an integrated structure.
The wearable antenna according to any one of claims 1 to 3, wherein the center of the radiation layer coincides with the center of the dielectric substrate.
The wearable antenna according to any one of claims 1 to 4, wherein each of the plurality of strip patches has a first end and a second end, and the first end of the plurality of strip patches is connected to Together, the second end of at least one strip-shaped patch is connected to the annular patch; the included angles between adjacent strip-shaped patches are the same.
The wearable antenna according to claim 5, wherein the number of the strip patches is N, the annular patch is divided into M sub-patches by M slots, N is an integer greater than 1, and M is An integer less than or equal to N.
The wearable antenna according to claim 6, wherein M is equal to N, the M sub-patches and N strip-shaped patches are connected in a one-to-one correspondence, and the slot is connected to a strip-shaped patch and a sub-patch. The location is adjacent.
The wearable antenna according to claim 7, wherein N is 3 or 4.
The wearable antenna according to claim 6, wherein M is less than N; N strip patches are all connected to the annular patch, and at least one sub-patch is connected to at least two strip patches.
The wearable antenna according to claim 9, wherein M is 2 and N is 4.
The wearable antenna of claim 6, wherein a second end of at least one strip patch extends into the slot.
The wearable antenna according to claim 11, wherein the wearable antenna has a first center line passing through the center of the dielectric substrate and a feeding position, and the M slots are located at opposite two sides of the first center line. side, and generally symmetrical about the first midline.
The wearable antenna according to claim 11, wherein the wearable antenna has a first center line passing through the center of the dielectric substrate and a feeding position, and passing through the center of the dielectric substrate and being connected to the first center line A vertical second centerline; the M sub-patches are located on opposite sides of the second centerline and are generally symmetrical about the second centerline.
The wearable antenna according to claim 5, wherein the ring-shaped patch is a closed ring shape, and the number of the strip-shaped patches is three.
The wearable antenna according to any one of claims 1 to 14, further comprising: a feed structure; the feed structure is connected to the ground layer and penetrates the ground layer and the dielectric substrate with the The radiation layers are connected, and the center of the feed structure and the center of the radiation layer do not coincide with each other.
An electronic device including the wearable antenna according to any one of claims 1 to 15.