CN115663474A - UWB antenna and electronic equipment - Google Patents

Abstract

The invention discloses a UWB antenna and electronic equipment. The UWB antenna includes: a main body having a feeding point; resonance point. The UWB antenna of the present invention can effectively reduce the lowest resonance point of the UWB antenna and improve the isolation between the UWB antenna and the WIFI antenna by providing an obliquely connected grounding portion on the main body. While having the lowest resonance point, the UWB antenna has a small overall size, which satisfies the design requirement of miniaturization.

Description

UWB antenna and electronic equipment

technical field

The present invention relates to the technical field of antenna manufacturing, and more specifically, to a UWB antenna and electronic equipment.

Background technique

With the development of UWB technology (UWB, Ultra Wideband, which is a carrier-free communication technology), more and more products start to use UWB antennas. When the product needs both UWB antenna and WIFI antenna, the isolation of the antenna needs to be considered. At the same time, in order to meet the miniaturization design requirements, the size of the antenna also needs to be considered.

Contents of the invention

An object of the present invention is to provide a new technical solution for UWB antennas and electronic equipment, which can at least solve the problems of poor isolation and large size of UWB antennas in the prior art.

A first aspect of the present invention provides a UWB antenna, including: a main body, the main body has a feed point; a grounding part, the grounding part is connected obliquely to the main body to reduce the UWB antenna resonance point.

Optionally, the main body is in the shape of a ring, and the grounding portion is obliquely arranged on one side of the main body.

Optionally, the grounding part is a grounding copper wire, the main body part and the grounding part are both arranged on the substrate, the feeding point is connected to the substrate, and the first end of the grounding part is connected to the The substrate is connected, the second end of the grounding part is connected to the main body, and the horizontal distance between the first end of the grounding part and the feeding point is 5mm-6mm.

Optionally, an inclination angle between the ground portion and the substrate is 40°-50°.

Optionally, the length of the ground portion is 4mm-5mm.

Optionally, hollows are formed inside the main body.

Optionally, the main body part includes: a first side part, a second side part, a third side part and a fourth side part, the first side part and the second side part are spaced apart and arranged in parallel, the The feed point is set on the second side, the two ends of the third side are respectively connected to one end of the first side and the second side, and the two ends of the fourth side are respectively connected to the other end of the first side and the second side, the first side, the second side, the third side and the fourth side are surrounded by a In the hollowed-out main body portion, the ground portion is obliquely connected to the fourth side portion.

Optionally, the length of the first side is greater than the length of the second side.

Optionally, the length of the first edge is 5mm-7mm.

Optionally, the third side and the fourth side are respectively arc-shaped.

A second aspect of the present invention provides an electronic device, including the UWB antenna in the above embodiment.

The UWB antenna of the present invention can effectively reduce the lowest resonance point of the UWB antenna and improve the isolation between the UWB antenna and the WIFI antenna by providing an obliquely connected grounding portion on the main body. While having the lowest resonance point, the UWB antenna has a small overall size, which satisfies the design requirement of miniaturization.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

Fig. 1 is the structural representation of the UWB antenna of prior art;

Fig. 2 is a schematic structural diagram of a UWB antenna according to an embodiment of the present invention;

Fig. 3 is a simulation schematic diagram of the UWB antenna according to the embodiment of the present invention;

Fig. 4 is another schematic diagram of simulation of a UWB antenna according to an embodiment of the present invention.

Reference signs:

Ladder antenna 1;

UWB antenna 100;

Main body 10; first side 11; second side 12; third side 13; fourth side 14; feeding point 15; hollow 16;

grounding part 20;

Substrate 30.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the specification and claims of the present invention, if the terms "first" and "second" feature are involved, one or more of these features may be included explicitly or implicitly. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front ", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axis The orientations or positional relationships indicated by "to", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying No device or element must have a specific orientation, be constructed, and operate in a specific orientation and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" involved 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 an electrical connection; it can be a direct connection or an indirect connection through an intermediary; connected. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Figure 1, the UWB antenna in the prior art is usually designed as a trapezoidal antenna 1. The interior of the trapezoidal UWB antenna is a solid structure. The existing UWB antenna is large in size and poor in isolation, and it is difficult to form a trapezoidal antenna in a lower frequency band. resonance.

The applicant researched and designed a new UWB antenna 100 mainly on the basis of the technical problems existing in the prior art, so as to solve the problems of large size and poor isolation of the UWB antenna in the prior art.

The UWB antenna 100 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 2 , the UWB antenna 100 according to the embodiment of the present invention includes a main body part 10 and a ground part 20 .

Specifically, the main body portion 10 has a feed point 15 . The ground part 20 is obliquely connected to the main body part 10 to lower the resonance point of the UWB antenna 100 .

In other words, referring to FIG. 2 , a UWB antenna 100 according to an embodiment of the present invention is mainly composed of a main body 10 and a ground 20 . Among them, the main body 10 has a feed point 15 . The ground portion 20 is obliquely connected to the main body 10 , and by disposing the obliquely connected ground portion 20 on the main body 10 , the lowest resonance point of the UWB antenna 100 can be effectively reduced.

The present invention increases the electrical length of the UWB antenna 100 by increasing the ground portion (ground portion 20 ). According to the principle of the antenna, the electrical length of the antenna increases, and the resonance point of the antenna moves to the low frequency, thereby achieving the effect of reducing the lowest resonance point.

Compared with the trapezoidal antenna in the prior art, under the same size, the UWB antenna 100 of the present invention can form resonance in a lower frequency band, meeting the performance requirements of the UWB antenna 100, and compared with the trapezoidal antenna in the prior art Therefore, the isolation between the UWB antenna 100 and the WIFI antenna of the present invention has been significantly improved.

It should be noted that, as shown in FIG. 1 and FIG. 2 , both can be improved on the basis of a square, wherein the same size means that the basic square has the same size. For FIG. 1 and FIG. 2 , the outer length of the first side portion 11 in FIG. 2 is the same as the length of the upper bottom edge of the T-shaped structure in FIG. 1 .

The present invention has carried out simulation test to UWB antenna 100, as shown in Figure 3, a is the trapezoidal antenna 1 in the prior art in Figure 3, and b is the UWB antenna 100 of the present invention, as can be seen from Figure 3, the UWB antenna of the present invention Compared with the trapezoidal antenna 1 in the prior art, the antenna 100 can form resonance in a lower frequency band under the same size, which meets the performance requirements of the UWB antenna 100 . As shown in Figure 4, a in Figure 4 is the trapezoidal antenna 1 in the prior art, and b is the UWB antenna 100 of the present invention, as can be seen from Figure 4, the UWB antenna 100 of the present invention is similar to the trapezoidal antenna 1 in the prior art Ratio, there is significant isolation between the two antennas.

For the antenna, it is generally below -10dB to meet the index requirements. It can be known from Figure 3 that curve a is below -10dB in the range of 6.5-9GHz, and curve b is below -10dB in the range of 6-8.5GHz. In contrast, the b curve meets the index requirements in a relatively lower frequency band than the a curve.

It should be noted that, according to the antenna theory, for the UWB antenna 100, the lower the frequency band of the antenna can resonate, the larger the required area of the antenna will be. In addition, under the same structure, the better the performance of the two antennas, the worse the isolation between the antennas. Therefore, the UWB antenna 100 of the present invention can resonate in a lower frequency band under the minimum size condition, and at the same time ensure better isolation from the WIFI antenna.

Thus, according to the UWB antenna 100 of the embodiment of the present invention, by providing the obliquely connected ground portion 20 on the main body 10, the lowest resonance point of the UWB antenna 100 can be effectively reduced, and the isolation between the UWB antenna 100 and the WIFI antenna can be improved. While having the lowest resonance point, the UWB antenna 100 has a small overall size, meeting the design requirement of miniaturization.

According to an embodiment of the present invention, referring to FIG. 2 , the main body 10 is in the shape of a ring, and the grounding portion 20 is obliquely disposed on one side of the main body 10 . That is to say, in the UWB antenna 100 of the present invention, the antenna main body is configured as a ring body, which can be understood as the outer contour of the main body part 10 . The ground portion 20 can be obliquely disposed on one side of the main body 10 , and by obliquely disposing the ground portion 20 on one side of the main body 10 , the lowest resonance point of the UWB antenna 100 can be effectively reduced. Compared with the trapezoidal antenna in the prior art, under the same size, the UWB antenna 100 of the present invention can form resonance in a lower frequency band, meeting the performance requirements of the UWB antenna 100, and compared with the trapezoidal antenna in the prior art Therefore, the isolation between the UWB antenna 100 and the WIFI antenna of the present invention has been significantly improved. By designing the main body 10 as a ring, on the one hand, the UWB antenna 100 can meet the requirement of -10dB at a lower frequency point. On the other hand, better isolation from the dual-frequency antenna can be ensured.

In some specific embodiments of the present invention, the grounding part 20 is a grounding copper wire, the main body 10 and the grounding part 20 are both arranged on the substrate 30, the feeding point 15 is connected to the substrate 30, and the first end of the grounding part 20 is connected to the substrate 30. 30 connection, the second end of the grounding part 20 is connected to the main body 10, and the horizontal distance between the first end of the grounding part 20 and the feeding point 15 is 5mm-6mm. The inclination angle between the ground portion 20 and the substrate 30 is 40°-50°. The length of the ground portion 20 is 4mm-5mm.

In other words, as shown in FIG. 2 , the grounding part 20 can be a grounding copper wire, the main body 10 and the grounding part 20 are both disposed on the substrate 30 , and the substrate 30 can be a copper plate of 50×60×1 mm. The feed point 15 on the main body 10 is connected to the substrate 30, the first end of the grounding part 20 is connected to the substrate 30, the second end of the grounding part 20 is connected to the main body 10, the first end and the second end of the grounding part 20 are opposite ends in the length direction of the ground portion 20 . Wherein, the horizontal distance between the first end of the grounding portion 20 and the feeding point 15 is approximately 5mm-6mm. Preferably, the distance between the ground part 20 (ground copper wire) and the feeding point 15 may be 5.6 mm, and the inclination angle between the ground part 20 and the substrate 30 is approximately 40°-50°. Preferably, the inclination angle between the ground portion 20 and the substrate 30 is approximately 45°, and the length of the ground portion 20 is approximately 4mm-5mm. Preferably, the length of the grounding point is 4.74mm. The UWB antenna 100 of the present invention is simulated and tested under the above conditions. Compared with the trapezoidal antenna in the prior art, under the same size, the antenna forms resonance at a lower frequency band, which meets the performance requirements of the UWB antenna 100 . And compared with the trapezoidal antenna in the prior art, the isolation between the UWB antenna 100 and the WIFI antenna has been significantly improved.

According to an embodiment of the present invention, referring to FIG. 2 , a hollow 16 is formed inside the main body 10 . That is to say, the inside of the main body 10 of the present invention is designed to dig holes, and a hollow 16 is formed inside the main body 10. By digging holes inside the main body 10, the lowest resonance point of the UWB antenna 100 can be further reduced, ensuring Under the same size, the UWB antenna 100 can complete resonance in a lower frequency band, and the isolation from the WIFI antenna can be further improved.

In the present invention, compared with the solid structure in the prior art, as shown in FIG. 1 , the solid structure is relatively simple and manufacturable, but the performance of the antenna is relatively poor. As shown in FIG. 2 , the present invention has relatively better antenna performance through the hole-digging design.

Comparing the antenna performance before and after digging, it is found that after digging, it can reach -10dB at a lower frequency point.

In some specific embodiments of the present invention, as shown in FIG. 2 , the main body portion 10 includes: a first side portion 11 , a second side portion 12 , a third side portion 13 and a fourth side portion 14 , the first side portion 11 It is spaced apart from and parallel to the second side portion 12, the feed point 15 is arranged on the second side portion 12, the two ends of the third side portion 13 are respectively connected with one end of the first side portion 11 and the second side portion 12, and the second The two ends of four sides 14 are respectively connected with the other end of the first side 11 and the second side 12, and the first side 11, the second side 12, the third side 13 and the fourth side 14 are surrounded to form a The main body portion 10 has a hollow 16 , and the ground portion 20 is obliquely connected to the fourth side portion 14 . The length of the first side portion 11 is greater than the length of the second side portion 12 . The length of the first side portion 11 is 5mm-7mm. The third side part 13 and the fourth side part 14 are respectively arc-shaped parts.

In other words, referring to FIG. 2 , the main body portion 10 is mainly composed of a first side portion 11 , a second side portion 12 , a third side portion 13 and a fourth side portion 14 . The main body part 10 may be an integral structure, wherein the first side part 11 and the second side part 12 are spaced apart and arranged in parallel, and the feeding point 15 is arranged on the second side part 12 . The two ends of the third side portion 13 can be respectively connected with one end of the first side portion 11 and the second side portion 12, and the two ends of the fourth side portion 14 can be respectively connected with the other end of the first side portion 11 and the second side portion 12. Connected at one end. The first side portion 11 , the second side portion 12 , the third side portion 13 and the fourth side portion 14 form a main body portion 10 with a hollow 16 , and the ground portion 20 is obliquely connected to the fourth side portion 14 . Wherein, the length of the first side portion 11 may be greater than the length of the second side portion 12 . The length of the first side portion 11 is 5mm-7mm, preferably, the length of the first side portion 11 is 6mm. The third side portion 13 and the fourth side portion 14 are respectively arranged as arc-shaped portions. In the present invention, the UWB antenna 100 can be located on a 50×60×1mm copper plate, the clearance area of the UWB antenna 100 can be 50×10mm in size, and the part enclosed by the main body 10 can be a 6×6mm copper plate. The third side portion 13 and the fourth side portion 14 are configured as two arcuate portions by removing two right-angled triangles with a side length of approximately 1.5 mm and taking arcs at opposite corners. In the present invention, a curved corner-cutting square patch (main body 10) is dug inside a hole, and an inclined grounding copper wire (grounding portion 20) is added to form a UWB antenna 100. The UWB antenna 100 can be used in a wider range under the same size. Resonance is completed in the low frequency band, and the isolation from the WIFI antenna is also significantly improved (see Figure 3 and Figure 4).

In a word, compared with the trapezoidal antenna in the prior art, the UWB antenna 100 of the present invention resonates in a lower frequency band under the same size, which meets the performance requirements of the UWB antenna 100 . And compared with the trapezoidal antenna in the prior art, the isolation between the UWB antenna 100 and the WIFI antenna has been significantly improved.

The second aspect of the present invention provides an electronic device, including the UWB antenna 100 in the above-mentioned embodiment. Since the UWB antenna 100 according to the present invention has the above-mentioned technical effects, the electronic device according to the embodiment of the present invention should also have Corresponding technical effects, that is, the electronic device of the present invention can form resonance in a lower frequency band by using the UWB antenna 100, which meets the performance requirements of the UWB antenna 100, and the isolation between the UWB antenna 100 and the WIFI antenna has improved. Obvious improvement, effectively improving the performance of electronic equipment.

In the present invention, the electronic equipment may be electronic products such as mobile phones and computers. Of course, for those skilled in the art, other structures and working principles of the electronic device and the UWB antenna 100 can be understood and realized, and will not be described in detail in the present invention.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (10)

1. An UWB antenna, comprising:

a body portion having a feed point;

a ground part connected to the main body part in an inclined manner to lower a resonance point of the UWB antenna.

2. The UWB antenna according to claim 1, wherein the main body portion is an annular body, and the ground portion is provided obliquely on one side of the main body portion.

3. The UWB antenna of claim 1, wherein the ground portion is a grounded copper wire, the main body portion and the ground portion are both disposed on a substrate, the feeding point is connected to the substrate, a first end of the ground portion is connected to the substrate, a second end of the ground portion is connected to the main body portion, and a horizontal distance between the first end of the ground portion and the feeding point is 5mm to 6mm.

4. The UWB antenna of claim 3 wherein the tilt angle between the ground and the substrate is 40 ° -50 °.

5. The UWB antenna of claim 1 wherein the ground section has a length of 4mm-5mm.

6. The UWB antenna of claim 1 wherein the interior of the body section is hollowed out.

7. The UWB antenna of claim 6 wherein the body section comprises: the feed point is arranged on the second edge part, two ends of the third edge part are respectively connected with one ends of the first edge part and the second edge part, two ends of the fourth edge part are respectively connected with the other ends of the first edge part and the second edge part, the main body part with the hollow part is surrounded by the first edge part, the second edge part, the third edge part and the fourth edge part, and the grounding part is obliquely connected with the fourth edge part.

8. The UWB antenna of claim 7 wherein the length of the first side is greater than the length of the second side, the length of the first side being 5-7 mm.

9. The UWB antenna of claim 7 wherein the third and fourth sides are each an arc-shaped portion.

10. An electronic device, characterized in that it comprises a UWB antenna according to any of claims 1 to 9.

Images