CN216720293U

CN216720293U - Laminated structure UWB circular polarization antenna and electronic equipment

Info

Publication number: CN216720293U
Application number: CN202123176217.2U
Authority: CN
Inventors: 向涛; 李怀山; 郑理强; 黄学胜; 卢北华
Original assignee: Shenzhen Youbisheng Information Technology Co ltd
Current assignee: Ubisoft Semiconductor Shenzhen Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-06-10
Anticipated expiration: 2031-12-16

Abstract

The utility model relates to a laminated UWB circular polarized antenna and electronic equipment, including: a first substrate and a second substrate; the first radiating unit is arranged on the first surface of the first substrate, the second radiating unit is arranged on the first surface of the second substrate, the ground unit is arranged on the second surface of the second substrate, and the feed through hole is arranged in the second radiating unit and penetrates through the second surface of the second substrate; the second surface of the first substrate is contacted with the first surface of the second substrate so that the first substrate is laminated on the second substrate; the first radiating element and the second radiating element are the same in shape, and the feed through hole penetrates through the ground element and is isolated from the ground element in an annular mode. The utility model can reduce the occupied space of the antenna while ensuring the performance of the antenna.

Description

Laminated structure UWB circular polarization antenna and electronic equipment

Technical Field

The utility model relates to the technical field of antennas, in particular to a laminated UWB (ultra Wide band) circularly polarized antenna and electronic equipment.

Background

Ultra Wideband (UWB) is a wireless carrier communication technology that can transmit data using nanosecond-level narrow pulses of non-sinusoidal waves, and thus occupies a wide frequency spectrum. The UWB technology has the advantages of low system complexity, low power spectral density of transmitted signals, insensitivity to channel fading, low interception capability, high positioning accuracy and the like, and is particularly suitable for high-speed wireless access in indoor and other dense multipath places.

However, the UWB system needs to transmit data at a high speed using a wide frequency of 500MHz or more, and thus, it has strict requirements on the design of an antenna, and it is required to implement a wide-band design of the antenna through a small size as much as possible to ensure data transmission performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a laminated UWB (ultra Wide band) circularly polarized antenna and electronic equipment.

The technical scheme adopted by the utility model for solving the technical problems is as follows: constructing a stacked UWB circularly polarized antenna comprising: a first substrate and a second substrate; and

the first radiating element is arranged on the first surface of the first substrate, the second radiating element is arranged on the first surface of the second substrate, the ground element is arranged on the second surface of the second substrate, and the feed through hole is arranged in the second radiating element and penetrates through the second surface of the second substrate;

wherein the second surface of the first substrate is in contact with the first surface of the second substrate to laminate the first substrate on the second substrate;

the first radiating element and the second radiating element are the same in shape, and the feed through hole penetrates through the ground element and is isolated from the ground element in an annular mode.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, the first radiation element and the second radiation element have the same size.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, the first radiation element and the second radiation element are overlapped with each other in a stacking direction of the first substrate and the second substrate.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, each of the first radiation element and the second radiation element is a hexagon.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, the hexagon includes a rectangle and a first isosceles triangle and a second isosceles triangle respectively connecting two opposite sides of the rectangle and having the opposite sides as bases.

Preferably, in the stacked UWB circular polarized antenna of the present invention, the first isosceles triangle and the second isosceles triangle are right triangles having the same size.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, the feeding via is disposed near an obtuse vertex of the hexagon.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, the ground unit has a rectangular shape.

Preferably, in the stacked UWB circular polarized antenna according to the present invention, the first substrate and the second substrate are rectangular substrates having the same size, and the ground unit covers all regions of the second surface of the second substrate except for the feed via and the annular isolation.

The present invention also provides an electronic device comprising a stacked UWB circularly polarized antenna as described in any of the above.

The implementation of the UWB circularly polarized antenna with the laminated structure and the electronic equipment has the following beneficial effects: the antenna can reduce the occupied space of the antenna while ensuring the performance of the antenna.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural diagram of an embodiment of a stacked UWB circular polarized antenna of the utility model;

FIG. 2 is a schematic structural diagram of another embodiment of a stacked UWB circular polarized antenna of the utility model;

FIG. 3 is a schematic structural diagram of another embodiment of a stacked UWB circular polarized antenna of the utility model;

FIG. 4 is a schematic structural diagram of another embodiment of a stacked UWB circular polarized antenna of the utility model;

FIG. 5 is a schematic diagram of hexagonal acquisition in a stacked UWB circular polarized antenna of the utility model;

FIG. 6 is a diagram illustrating impedance bandwidth testing of an embodiment of a stacked UWB circularly polarized antenna of the utility model;

FIG. 7 is an axial ratio bandwidth test chart of an embodiment of a stacked UWB circular polarized antenna of the utility model;

FIG. 8 is a group delay test chart of an embodiment of a stacked UWB circular polarized antenna of the utility model;

FIG. 9 is a group delay test chart of an embodiment of a stacked UWB circular polarized antenna of the utility model.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, in a first embodiment of a stacked UWB circular polarized antenna according to the present invention, the stacked UWB circular polarized antenna includes: a first substrate 10 and a second substrate 20; the first radiating element 111 is disposed on the first surface 11 of the first substrate 10, the second radiating element 211 is disposed on the first surface 21 of the second substrate 20, the ground element 221 is disposed on the second surface 22 of the second substrate 20, and the feed via 23 is disposed in the second radiating element 211 and penetrates through the second surface 22 of the second substrate 20; wherein the second surface of the first substrate 10 is in contact with the first surface 21 of the second substrate 20 to laminate the first substrate 10 on the second substrate 20; the first radiation element 111 and the second radiation element 211 have the same shape, and the feed via 23 penetrates through the ground element 221 and is provided with an annular isolation 24 with the ground element 221. Specifically, the first substrate 10 and the second substrate 20 are stacked, wherein the second surface of the first substrate 10 and the first surface 21 of the second substrate 20 are stacked in contact. The first substrate 10 and the second substrate 20 may be directly attached to each other by non-inductive screws such as plastic screws, or bonded by adhesives, or may be formed of four-layer type PCBs, for example, four-layer PCBs, in which copper foils are removed from the middle layers. The first surface 11 of the first substrate 10 is provided with a first radiating element 111, the first surface 21 of the second substrate 20 is provided with a second radiating element 211, and the second radiating element 211 penetrates the second surface 22 of the second substrate 20 through a feeding via 23 penetrating through the second substrate 20, and is connected with a previous stage circuit on the second surface 22 of the second substrate 20 to receive and transmit a corresponding feeding signal. While the second surface 22 of the second substrate 20 is provided with a ground unit 221 for correspondingly connecting the ground corresponding to the feeding signal. Wherein the feed via 23 is isolated from the ground cell 221 at the second surface 22 of the second substrate 20 by a ring-shaped isolation 24. That is, it can be understood that the feed via 23 is located within the ground cell 221 and surrounded by the ground cell 221. In addition, the first radiation unit 111 and the second radiation unit 211 are in the same shape, and the first radiation unit 111 enhances signals of the second radiation unit 211, so that the performance of the whole antenna is improved. The first radiation unit 111 and the second radiation unit 211 are both formed of a metal layer, and the ground unit 221 is also formed of a metal layer.

Optionally, in the stacked UWB circular polarized antenna of the present invention, the first radiation element 111 and the second radiation element 211 have the same size. Specifically, the first radiation unit 111 and the second radiation unit 211 have the same shape and are designed to have the same size.

Alternatively, in the stacked UWB circular polarized antenna of the present invention, the first radiation element 111 and the second radiation element 211 are overlapped in the stacking direction of the first substrate 10 and the second substrate 20. Specifically, the first radiation unit 111 and the second radiation unit 211 are overlapped with each other in the lamination direction of the first substrate 10 and the second substrate 20, that is, the projections of the first radiation unit 111 and the second radiation unit 211 on the contact surface of the first substrate 10 and the second substrate 20 are overlapped.

Optionally, in the stacked UWB circular polarized antenna of the present invention, both the first radiation element 111 and the second radiation element 211 are hexagonal. Specifically, the first radiation unit 111 and the second radiation unit 211 are hexagons having the same size.

Optionally, in the stacked UWB circular polarized antenna of the present invention, the hexagon includes a rectangle and a first isosceles triangle and a second isosceles triangle respectively connected to two opposite sides of the rectangle and having the opposite sides as bases. Specifically, the hexagons of the first radiation unit 111 and the second radiation unit 211 can be obtained by cutting corners of a large rectangle with the same size, that is, the corresponding hexagons can be obtained by cutting off four corners of the rectangle. The frequency difference between two resonant frequencies of the antenna can be influenced by the size of the angle cut-off part of the large rectangle, so that the bandwidth of the whole antenna can be greatly adjusted by selecting a proper selection cut-off angle. The selection of the side length of the large rectangle can be adjusted appropriately according to the requirement of the antenna frequency. The schematic diagram of the cutting angle is shown in fig. 5, points A1 and A2 are taken along two pairs of edges of the rectangle, A1 and A2 are respectively taken as an end point, and the other two pairs of edges are extended along dotted lines A1B1, A1B3, A2B2 and A2B4 to perform the cutting angle. The hexagons are switched to obtain a small rectangle and two isosceles triangles connecting a set of opposite sides of the small rectangle.

Optionally, the first isosceles triangle and the second isosceles triangle are right-angled triangles with the same size. Specifically, when the large rectangle is subjected to corner cutting, the cut-off part is an isosceles triangle, and the first isosceles triangle and the second isosceles triangle which are formed by cutting off are also right-angled triangles.

Optionally, in the stacked UWB circular polarized antenna of the present invention, the feed via 23 is disposed near an obtuse vertex of the hexagon. Specifically, the position of the feed via 23 has a significant effect on the axial ratio bandwidth, and in one embodiment, the feed via 23 may be disposed as close to an obtuse vertex of the hexagon as possible.

Optionally, in the stacked UWB circular polarized antenna of the present invention, the ground unit 221 is rectangular. Specifically, the ground unit 221 is provided with a rectangle, and the size of the rectangle can be set according to the requirement of the antenna.

Optionally, in the stacked UWB circular polarized antenna of the present invention, the first substrate 10 and the second substrate 20 are rectangular substrates having the same size, and the ground unit 221 covers all regions of the second surface 22 of the second substrate 20 except for the feed via 23 and the annular isolation 24. Specifically, the first substrate 10 and the second substrate 20 are rectangular substrates having the same size, and the first substrate 10 and the second substrate 20 are completely overlapped when they are stacked. Meanwhile, the rectangular ground unit 221 covers all the area on the entire second substrate 20 except for the feed via 23 and the annular isolation 24. In addition, the feed via 23 size can affect antenna performance, which is typically provided as desired.

In a specific embodiment, the first substrate 10 and the second substrate 20 are both made of RF4 board with a dielectric constant of 4.3, the first substrate 10 and the second substrate 20 are both set to have a thickness of 2mm, and the first radiation unit 111, the second radiation unit 211 and the ground unit 221 are all set to have a metal layer thickness of 1 oz; the antenna test effect is shown in fig. 6 to 9, and compared with the existing UWB antenna, the performance of the antenna is greatly improved while the size of the antenna is reduced. In the embodiment, the impedance bandwidth of-10 dB can be expanded from the existing 1GHz to 2.7 GHz; the axial ratio bandwidth of 3dB is expanded from the existing 160MHz to 810 MHz.

Further, an electronic device of the present invention includes the stacked-structure UWB circularly polarized antenna as described in any of the above. Which is connected to the internal electronic circuit at the second surface 22 of the second substrate 20 through the feeding via 23, can achieve a reduction in the overall volume of the electronic device while ensuring the performance of the electronic device.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the utility model, are given by way of illustration and description, and are not to be construed as limiting the scope of the utility model; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.

Claims

1. A stacked UWB circularly polarized antenna comprising: a first substrate (10) and a second substrate (20); and

a first radiation unit (111) disposed on the first surface of the first substrate (10), a second radiation unit (211) disposed on the first surface of the second substrate (20), a ground unit (221) disposed on the second surface of the second substrate (20), and a feed via (23) disposed in the second radiation unit (211) and penetrating to the second surface of the second substrate (20);

wherein the second surface of the first substrate (10) is in contact with the first surface of the second substrate (20) to laminate the first substrate (10) on the second substrate (20);

the first radiating element (111) and the second radiating element (211) are the same in shape, and the feed through hole (23) penetrates through the ground element (221) and is provided with annular isolation (24) with the ground element (221).

2. The stacked UWB circularly polarized antenna of claim 1 wherein the first radiating element (111) is the same size as the second radiating element (211).

3. The stacked structure UWB circularly polarized antenna according to claim 2, wherein the first radiation element (111) and the second radiation element (211) coincide in a stacking direction of the first substrate (10) and the second substrate (20).

4. The stacked UWB circularly polarized antenna according to claim 2, wherein the first radiation element (111) and the second radiation element (211) are each hexagonal.

5. The stacked UWB circularly polarized antenna of claim 4, wherein the hexagon comprises a rectangle and a first isosceles triangle and a second isosceles triangle respectively connecting and being based on two opposite sides of the rectangle.

6. The stacked UWB circularly polarized antenna of claim 5 wherein the first isosceles triangle and the second isosceles triangle are right triangles of equal size.

7. The stacked UWB circularly polarized antenna of claim 5 wherein the feed via (23) is disposed near an obtuse vertex of the hexagon.

8. The stacked UWB circularly polarized antenna according to claim 1, wherein the ground unit (221) has a rectangular shape.

9. The stacked UWB circular polarized antenna according to claim 1, wherein the first substrate (10) and the second substrate (20) are rectangular substrates having the same size, and the ground unit (221) covers all regions except the feed via (23) and the annular isolation (24) in the second surface of the second substrate (20).

10. An electronic device comprising the stacked UWB circularly polarized antenna according to any one of claims 1 to 9.