Ultra-wideband antenna and communication equipment

Abstract

The embodiment of the utility model relates to the technical field of antennas, and particularly discloses an ultra wide band antenna and a communication device, the ultra wide band antenna comprises a substrate, a radiation piece and a radio frequency ground piece, the substrate is provided with a first surface and a second surface, the first surface and the second surface are oppositely arranged, the radiation piece is arranged on the first surface, and the radio frequency ground piece is arranged on the radiation piece. The radiation part comprises a radiation body and a feeder line, the radiation body is in a drum shape and is connected with the feeder line, the radio frequency ground part is arranged on the second surface, and a groove is formed in the radio frequency ground part. Through the above mode, the ultra-wideband antenna provided by the embodiment of the utility model has the advantages of relatively fewer components, compact overall structure, small occupied space and miniaturization.

Description

Technical Field

[0001] The embodiments of the present utility model relate to the technical field of antennas, and particularly to an ultra-wideband antenna and a communication device. Background Art

[0002] Millimeter-wave ultra-wideband antennas have the characteristics of high transmission rate, low cost, light weight, simple design, and easy integration with other components, making millimeter-wave ultra-wideband antennas widely used in communication devices.

[0003] However, in the process of implementing the embodiments of the present utility model, the inventors found that: currently, millimeter-wave ultra-wideband antennas have the defect of large size, resulting in large occupied space and restricting their use in communication devices. Summary of the Utility Model

[0004] The main technical problem to be solved by the present utility model is to provide an ultra-wideband antenna to solve the problem that the ultra-wideband antenna has a large size defect, resulting in large occupied space.

[0005] To solve the above technical problem, a technical solution adopted by the present utility model is: to provide an ultra-wideband antenna, including a substrate, a radiating element, and a radio frequency ground element. The substrate has a first surface and a second surface, the first surface and the second surface are oppositely arranged, the radiating element is arranged on the first surface, the radiating element includes a radiator and a feeder, the shape of the radiator is drum-shaped, the radiator is connected to the feeder, the radio frequency ground element is arranged on the second surface, and the radio frequency ground element is provided with a groove.

[0006] Optionally, the radiating element and the radio frequency ground element are symmetrically arranged with respect to the central axis plane of the substrate.

[0007] Optionally, the radiator includes a first radiating sheet, a second radiating sheet, and a third radiating sheet. The first radiating sheet, the second radiating sheet, and the third radiating sheet are connected in sequence, and the second radiating sheet is connected to the feeder.

[0008] Optionally, the shapes of the first radiating sheet and the third radiating sheet are both semi-elliptical, and the shape of the second radiating sheet is rectangular, so that the shape of the radiator is drum-shaped.

[0009] Optionally, the end of the feeder away from the radiator extends to the edge of the substrate.

[0010] Optionally, the characteristic impedance of the feeder is 50 ohms.

[0011] Optionally, the RF ground part includes a first RF ground sheet, a second RF ground sheet, and a third RF ground sheet. The first RF ground sheet, the second RF ground sheet, and the third RF ground sheet are connected in sequence, and the first RF ground sheet, the second RF ground sheet, and the third RF ground sheet enclose the groove.

[0012] Optionally, one end of the first RF ground sheet, the second RF ground sheet, and the third RF ground sheet away from the groove extends to the edge of the substrate.

[0013] Optionally, the first RF ground sheet, the second RF ground sheet, and the third RF ground sheet are all rectangular in shape.

[0014] To solve the above technical problems, another technical solution adopted by the present utility model is: to provide a communication device including the above-mentioned ultra-wideband antenna.

[0015] In an embodiment of the present utility model, the ultra-wideband antenna includes a substrate, a radiating part, and an RF ground part. The substrate has a first surface and a second surface, and the first surface and the second surface are oppositely arranged. The radiating part is disposed on the first surface, and the radiating part includes a radiator and a feeder. The shape of the radiator is drum-shaped, the radiator is connected to the feeder, and the RF ground part is disposed on the second surface, and the RF ground part is provided with a groove. Since the ultra-wideband antenna includes a substrate, a radiating part, and an RF ground part, and the radiating part includes a drum-shaped radiator and a feeder, the components of the ultra-wideband antenna are relatively few, the overall structure is compact, and the occupied space is small. Therefore, it has the advantage of miniaturization and is convenient to be applied to miniaturized communication devices. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. Obviously, the following described drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the drawings.

[0017] Figure 1 It is a schematic structural diagram of the ultra-wideband antenna provided by the embodiment of the present utility model;

[0018] Figure 2 It is an exploded schematic structural diagram of the ultra-wideband antenna provided by the embodiment of the present utility model;

[0019] Figure 3 It is a schematic top view of the ultra-wideband antenna provided by the embodiment of the present utility model;

[0020] Figure 4 It is a schematic bottom view of the ultra-wideband antenna provided by the embodiment of the present utility model;

[0021] Figure 5 is the graph of the reflection coefficient of the ultra-wideband antenna provided by the embodiment of the present utility model varying with different L P ;

[0022] Figure 6 is the graph of the reflection coefficient of the ultra-wideband antenna provided by the embodiment of the present utility model varying with different W P ;

[0023] Figure 7 is the graph of the reflection coefficient of the ultra-wideband antenna provided by the embodiment of the present utility model varying with different L GM ;

[0024] Figure 8 is the graph of the reflection coefficient of the ultra-wideband antenna provided by the embodiment of the present utility model varying with different W GM ;

[0025] Figure 9 is the graph of the reflection coefficient of the ultra-wideband antenna provided by the embodiment of the present utility model varying with different H T ;

[0026] Figure 10 is the simulation graph of the reflection coefficient of the ultra-wideband antenna provided by the embodiment of the present utility model;

[0027] Figure 11 is the simulation graph of the maximum gain and radiation efficiency of the ultra-wideband antenna provided by the embodiment of the present utility model;

[0028] Figure 12 is the radiation pattern of the ultra-wideband antenna provided by the embodiment of the present utility model at 9.0 GHz;

[0029] Figure 13 is the radiation pattern of the ultra-wideband antenna provided by the embodiment of the present utility model at 20.0 GHz;

[0030] Figure 14 is the radiation pattern of the ultra-wideband antenna provided by the embodiment of the present utility model at 29.0 GHz.

[0031] Description of reference numerals:

[0032] 100, ultra-wideband antenna;

[0033] 1, substrate;

[0034] 2, radiator; 21, radiating body; 211, first radiating sheet; 22, second radiating sheet; 213, third radiating sheet; 22, feeder;

[0035] 3, RF ground part; 31, first RF ground sheet; 32, second RF ground sheet; 33, third RF ground sheet; 34, groove. Detailed implementation manners

[0036] For the convenience of understanding the present utility model, the present utility model will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as "locked to" another element, it can be directly on the other element, or there can be one or more intermediate elements therebetween. When an element is expressed as "connected" to another element, it can be directly connected to the other element, or there can be one or more intermediate elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are only for the purpose of illustration.

[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in this specification in the description of the present utility model are only for the purpose of describing specific embodiments and are not used to limit the present utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0038] Please refer to Figure 1 and Figure 2 , the present application provides an ultra-wideband antenna 100. The ultra-wideband antenna 100 is generally in a planar structure. The ultra-wideband antenna 100 includes a substrate 1, a radiating element 2 and a radio frequency ground element 3. The substrate 1 has a first surface and a second surface, and the first surface and the second surface are oppositely arranged. The radiating element 2 is arranged on the first surface, and the radiating element 2 is symmetrically arranged with respect to the central axis plane of the substrate 1. The radio frequency ground element 3 is arranged on the second surface, and the radio frequency ground element 3 is symmetrically arranged with respect to the central axis plane of the substrate 1.

[0039] It should be noted that the substrate 1 is a dielectric plate.

[0040] For the above-mentioned radiating element 2, please refer to Figure 2 and Figure 3 , the radiating element 2 includes a radiator 21 and a feeder 22. The radiator 21 is arranged at one end of the first surface, and the shape of the radiator 21 is drum-shaped. The feeder 22 is arranged at the other end of the first surface. The feeder 22 is connected to the radiator 21, and the end of the feeder 22 away from the radiator 21 extends to the edge of the substrate 1. Since the radiating element 2 is symmetrically arranged with respect to the central axis plane of the substrate 1, in other words, the central axis plane of the feeder 22, the central axis plane of the radiator 21 and the central axis plane of the substrate 1 are coplanar.

[0041] The radiator 21 includes a first radiating sheet 211, a second radiating sheet 22, and a third radiating sheet 213. The first radiating sheet 211, the second radiating sheet 22, and the third radiating sheet 213 are connected in sequence. The second radiating sheet 22 is connected to the feeder 22. The shapes of the first radiating sheet 211 and the third radiating sheet 213 are both semi-elliptical, and the shape of the second radiating sheet 22 is rectangular, so that the overall shape of the radiating element 2 is drum-shaped, thereby expanding the impedance bandwidth of the ultra-wideband antenna 100 and ensuring that the radiation efficiency is sufficiently flat within the passband. Since the radiating element 2 is symmetrically arranged with respect to the central axis plane of the substrate 1, the first radiating sheet 211 and the third radiating sheet 213 are symmetrically arranged with respect to the central axis plane of the substrate 1, and the second radiating sheet 22 is symmetrically arranged with respect to the central axis plane of the substrate 1. As a result, the length of the second radiating sheet 22, the major axis length of the semi-elliptical first radiating sheet 211, and the major axis length of the semi-elliptical third radiating sheet 213 are equal, and the minor axis length of the semi-elliptical first radiating sheet 211 and the minor axis length of the semi-elliptical third radiating sheet 213 are the same.

[0042] In some embodiments, the radiator 21 is made of metal.

[0043] In some embodiments, the characteristic impedance of the feeder 22 is 50 ohms, and the feeder 22 is made of metal.

[0044] For the above-mentioned RF ground element 3, please refer to Figure 4 , the RF ground element 3 includes a first RF ground sheet 31, a second RF ground sheet 32, and a third RF ground sheet 33. The first RF ground sheet 31, the second RF ground sheet 32, and the third RF ground sheet 33 are connected in sequence. One end of the first RF ground sheet 31 and one end of the third RF ground sheet 33 both protrude from the second RF ground sheet 32, so that the first RF ground sheet 31, the second RF ground sheet 32, and the third RF ground sheet 33 enclose a groove 34. One end of the first RF ground sheet 31 away from the groove 34, one end of the second RF ground sheet 32 away from the groove 34, and one end of the third RF ground sheet 33 away from the groove 34 all extend to the edge of the substrate 1. The sum of the widths of the first RF ground sheet 31, the second RF ground sheet 32, and the third RF ground sheet 33 is equal to the width of the substrate 1. The shapes of the first RF ground sheet 31, the second RF ground sheet 32, and the third RF ground sheet 33 are all rectangular. By providing the groove 34 in the RF ground element 3, the impedance bandwidth of the ultra-wideband antenna 100 is increased. Since the RF ground element 3 is symmetrically arranged with respect to the central axis plane of the substrate 1, the first RF ground sheet 31 and the third RF ground sheet 33 are symmetrically arranged with respect to the central axis plane of the substrate 1, and the second RF ground sheet 32 is symmetrically arranged with respect to the central axis plane of the substrate 1. As a result, the lengths and widths of the rectangular first RF ground sheet 31 and the rectangular second RF ground sheet 32 are equal.

[0045] In some embodiments, the RF ground element 3 is made of metal.

[0046] It should be noted that the radiation performance of the ultra-wideband antenna 100 is determined by the size parameters of the radiator 21, and the bandwidth and reflection coefficient of the ultra-wideband antenna 100 are jointly determined by the size parameters of the RF ground element 3 and the size parameters of the radiator 21.

[0047] To more thoroughly illustrate the structure proposed by this invention, this application provides a design example. In this design example, the dielectric constant of the substrate 1 is 3.38, the dielectric loss of the substrate 1 is 0.0022, and the thickness of the substrate 1 is 0.2 mm; both the radiator 2 and the RF ground element 3 are copper-plated, and the thicknesses of both the radiator 2 and the RF ground element 3 are 0.035 mm. The top view and bottom view of the layout of this design example are respectively as Figure 4 and 5 shown. Among them, L A is the length of the substrate 1, W A is the width of the substrate 1 and the width of the RF ground element 3, L GM is the length of the second RF ground sheet 32, L GRL is the length of the first RF ground sheet 31 and the length of the third RF ground sheet 33, W GM is the width of the second RF ground sheet 32, L P is the length of the second radiator sheet 22, the major axis length of the semi-elliptical first radiator sheet 211 and the major axis length of the semi-elliptical third radiator sheet 213, W P is the width of the second radiator sheet 22 group, H T is the minor axis length of the semi-elliptical first radiator sheet 211 and the minor axis length of the semi-elliptical third radiator sheet 213, LF is the length of the feeder 22, W F is the width of the feeder 22.

[0048] Figures 5 - 9 The effects of the size parameters L P , W P , L GM , W GM and H T on the reflection coefficient of the ultra-wideband antenna 100 are respectively given.

[0049] Figure 5 is the graph of the change of the reflection coefficient of the ultra-wideband antenna 100 with different L P . As Figure 5 shown, as the parameter L P increases, the impedance bandwidth of the ultra-wideband antenna 100 becomes wider, and the reflection coefficient within the impedance bandwidth becomes worse.

[0050] Figure 6 is the graph of the change of the reflection coefficient of the ultra-wideband antenna 100 with different W P . As Figure 6As shown, as the parameter W P increases, the impedance bandwidth of the ultra-wideband antenna 100 becomes wider, and the reflection coefficient within the impedance bandwidth improves.

[0051] Figure 7 is a graph showing the variation of the reflection coefficient of the ultra-wideband antenna 100 with different L GM . As Figure 7 shown, as the parameter L GM increases, the impedance bandwidth of the ultra-wideband antenna 100 becomes narrower, and the reflection coefficient within the impedance bandwidth deteriorates.

[0052] Figure 8 is a graph showing the variation of the reflection coefficient of the ultra-wideband antenna 100 with different W GM . As Figure 8 shown, as the parameter W GM increases, the impedance bandwidth of the ultra-wideband antenna 100 becomes narrower, and the reflection coefficient within the impedance bandwidth improves.

[0053] Figure 9 is a graph showing the variation of the reflection coefficient of the ultra-wideband antenna 100 with different H T , as Figure 9 shown, as the parameter H T increases, the impedance bandwidth of the ultra-wideband antenna 100 becomes narrower, and the reflection coefficient within the impedance bandwidth deteriorates.

[0054] From the above research, a set of optimized parameters are obtained: L A = 11.0 mm, W A = 11.0 mm, L GM = 3.8 mm, L GRL = 5.0 mm, W GM = 8.4 mm, L P = 6.5 mm, W P = 4.8 mm, H T = 2.6 mm, L F = 4.0 mm, W F = 0.4 mm.

[0055] Based on the above parameter optimization, the reflection coefficient of the ultra-wideband antenna 100 is as Figure 10 shown. The bandwidth range where the reflection coefficient of the ultra-wideband antenna 100 is less than -10 dB is from 10.1 GHz to 29.7 GHz, the center frequency is 19.9 GHz, the absolute bandwidth is 19.6 GHz, and the relative bandwidth is 98.5%, showing ultra-wideband characteristics; there are also two transmission poles within the passband of the ultra-wideband antenna 100, located at 14.3 GHz and 24.5 GHz respectively, ensuring the flatness of the maximum gain and radiation efficiency within the passband.

[0056] The simulation results of the maximum gain and radiation efficiency of the ultra-wideband antenna 100 optimized based on the above parameters are as follows Figure 11 shown. The average maximum gain of the ultra-wideband antenna 100 within the passband is 3.98 dBi, showing the advantage of high maximum gain; the average radiation efficiency of the ultra-wideband antenna 100 within the passband is 97.4%, showing the advantage of high radiation efficiency.

[0057] The radiation patterns of the ultra-wideband antenna 100 optimized based on the above parameters at 9.0 GHz, 20.0 GHz, and 29 GHz are as follows Figures 12 - 14 shown. The ultra-wideband antenna 100 is an omnidirectional antenna.

[0058] In the embodiment of the present utility model, the ultra-wideband antenna 100 includes a substrate 1, a radiating element 2, and a radio frequency ground element 3. The substrate 1 has a first surface and a second surface, and the first surface and the second surface are oppositely arranged. The radiating element 2 is disposed on the first surface. The radiating element 2 includes a radiator 21 and a feeder 22. The shape of the radiator 21 is drum-shaped, and the radiator 21 is connected to the feeder 22. The radio frequency ground element 3 is disposed on the second surface, and the radio frequency ground element 3 is provided with a groove 34. Since the ultra-wideband antenna 100 includes the substrate 1, the radiating element 2, and the radio frequency ground element 3, and the radiating element 2 includes a drum-shaped radiator 21 and a feeder 22, the components of the ultra-wideband antenna 100 are relatively few, the overall structure is compact, and the occupied space is small. Therefore, it has the advantage of miniaturization and is convenient to be applied to miniaturized communication devices.

[0059] The present utility model also provides an embodiment of a communication device. The communication device includes the above ultra-wideband antenna 100. For the structure and function of the ultra-wideband antenna 100, reference can be made to the above embodiments, and details will not be repeated here.

[0060] It should be noted that the present utility model provides preferred embodiments in the description and drawings of the present utility model. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not impose additional limitations on the content of the present utility model. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Furthermore, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the description of the present utility model. Further, for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A ultra-wideband antenna, characterized in that, Comprising: A substrate having a first surface and a second surface, the first surface and the second surface being oppositely arranged; A radiator disposed on the first surface, the radiator including a radiating body and a feeder, the shape of the radiating body being drum-shaped, and the radiating body being connected to the feeder; A radio frequency ground element disposed on the second surface, the radio frequency ground element being provided with a groove.

2. The ultra-wideband antenna according to claim 1, wherein The radiator and the radio frequency ground element are symmetrically arranged with respect to the central axis plane of the substrate.

3. The ultra-wideband antenna according to claim 2, wherein The radiating body includes a first radiating sheet, a second radiating sheet and a third radiating sheet, the first radiating sheet, the second radiating sheet and the third radiating sheet are sequentially connected, and the second radiating sheet is connected to the feeder.

4. The ultra-wideband antenna according to claim 3, wherein The shapes of the first radiating sheet and the third radiating sheet are both semi-elliptical, and the shape of the second radiating sheet is rectangular, so that the shape of the radiating body is drum-shaped.

5. The ultra-wideband antenna according to claim 2, wherein One end of the feeder away from the radiating body extends to the edge of the substrate.

6. The ultra-wideband antenna according to claim 1, wherein The characteristic impedance of the feeder is 50 ohms.

7. The ultra-wideband antenna according to claim 2, wherein The radio frequency ground element includes a first radio frequency ground sheet, a second radio frequency ground sheet and a third radio frequency ground sheet, the first radio frequency ground sheet, the second radio frequency ground sheet and the third radio frequency ground sheet are sequentially connected, and the first radio frequency ground sheet, the second radio frequency ground sheet and the third radio frequency ground sheet enclose the groove.

8. The ultra-wideband antenna according to claim 7, wherein One ends of the first radio frequency ground sheet, the second radio frequency ground sheet and the third radio frequency ground sheet away from the groove all extend to the edge of the substrate.

9. The ultra-wideband antenna according to claim 7, wherein The shapes of the first radio frequency ground sheet, the second radio frequency ground sheet and the third radio frequency ground sheet are all rectangular.

10. A communication device, characterized in that, An ultra-wideband antenna comprising any one of claims 1-9.

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