Ultrahigh frequency broadband antenna with bending structure

Abstract

The utility model discloses an ultrahigh frequency broadband antenna with a bending structure, and belongs to the technical field of antennas. Through the combination design of the butterfly plane radiator and the vertical bending rectangular conductor sheet, the ultrahigh frequency broadband antenna with compact structure, broadband coverage and high radiation efficiency is realized. The antenna structure comprises a dielectric substrate, a butterfly-shaped plane radiator, a vertical bending rectangular conductor sheet and a coaxial feeder line. And the butterfly-shaped plane radiator is connected with the vertical bending conductor sheet in a welding manner, so that the distribution of an electromagnetic field is optimized. The coaxial feed line is connected with the radiator through the substrate to form a stable feed structure. The antenna has the characteristics of wide band, low loss and miniaturization, and has wide market prospect and application value in the fields of wireless communication, Internet of Things, sensing systems and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of antenna, especially a kind of ultra-high frequency broadband antenna with bending structure. BACKGROUND

[0002] With the rapid development of wireless communication technology, ultra-high frequency band is widely used in mobile communication, radar, broadcast television, Internet of Things and other fields. As an important part of wireless communication system, the design of antenna directly affects the transmission quality of signal and the overall performance of system. In the application of ultra-high frequency band, the antenna not only needs to meet the design requirements of compactness and miniaturization, but also needs to realize wideband characteristics to adapt to various communication environments and frequency requirements. However, the design of traditional ultra-high frequency antenna usually faces the following challenges: first, the miniaturization design of antenna will cause the resonance frequency to move up, the bandwidth to decrease, and even the radiation efficiency to decrease significantly; second, the existing wideband antenna usually relies on complex multi-layer or multi-element structure, which increases the manufacturing cost and debugging difficulty; finally, in compact antenna, the optimization of electromagnetic field distribution is difficult, which limits the further improvement of antenna performance.

[0003] As a kind of antenna design method, the bending structure antenna can realize miniaturization in limited physical size while maintaining good bandwidth performance and radiation efficiency to some extent by introducing bending path to extend the electrical length of antenna. Traditional bending structure antenna is widely used in low frequency communication equipment, but in ultra-high frequency band, the performance of bending structure antenna still has deficiencies, such as difficult impedance matching optimization, high design structure complexity, and large power loss when realizing wideband coverage. In addition, the design of bending path has a significant impact on the distribution of electromagnetic field, which easily leads to the distortion of antenna radiation pattern. Therefore, an ultra-high frequency broadband antenna with innovative structure is needed, which can realize wide working bandwidth and high radiation efficiency while maintaining miniaturization design to meet the needs of modern wireless communication equipment. SUMMARY

[0004] In order to solve the technical problems mentioned in the background, the utility model provides an ultra-high frequency broadband antenna with bending structure, which improves the miniaturization, wideband performance and radiation efficiency of antenna through innovative structure design, to meet the needs of modern wireless communication equipment.

[0005] In order to realize the above technical purpose, the technical scheme of the utility model is as follows:

[0006] An ultra-high frequency broadband antenna with bending structure, characterized by comprising a butterfly-shaped planar radiator, a vertical bending conductor sheet, a dielectric substrate and a vertical coaxial feeder;

[0007] The butterfly-shaped planar radiator is a symmetrical butterfly-shaped structure and is made on a medium substrate with a single-layer copper clad layer; the copper clad layer is connected with the vertical bending conductor sheet;

[0008] The vertical bending conductor sheet is two, one end of each vertical bending conductor sheet is connected with a corresponding part of the butterfly-shaped planar radiator, and the two vertical bending conductor sheets and the butterfly-shaped planar radiator combine to form a basic antenna structure, which optimizes the electromagnetic field distribution of the antenna and improves the radiation efficiency and working bandwidth of the antenna;

[0009] The medium substrate is used for supporting the butterfly-shaped planar radiator and the vertical bending rectangular conductor sheet.

[0010] The vertical coaxial feeder is connected with a feeding source at one end and connected with the butterfly-shaped planar radiator at the other end; wherein the coaxial feeder is connected with the conductors on both sides of the butterfly-shaped radiator through the substrate.

[0011] Further, the medium substrate is a rectangle.

[0012] Further, the material of the medium substrate has a relative dielectric constant of 3.87-4.2 and a loss tangent less than 0.02.

[0013] Further, the outer conductor of the vertical coaxial feeder is connected with the small conductor sheet at the bottom of the substrate first, and then connected with one side of the butterfly-shaped planar radiator through a hole, and the inner conductor of the vertical coaxial feeder is directly connected with the other side of the butterfly-shaped planar radiator through the substrate.

[0014] Further, the butterfly-shaped planar radiator is composed of a pair of symmetrical isosceles trapezoids.

[0015] Further, the vertical bending conductor sheet is a rectangular structure.

[0016] Further, the vertical bending conductor sheet is connected with the butterfly-shaped planar radiator on the upper surface of the medium substrate by welding.

[0017] Further, the coaxial feeder is connected with the antenna at one end of the vertical butterfly-shaped planar radiator, and connected with the feeding source through an SMA joint or other standard joint.

[0018] Further, the coaxial feeder is vertically extended, then bent by 90 degrees to be parallel to the butterfly-shaped planar radiator, thereby forming a parallel section of the feeder.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. Superior broadband performance: Through the combination of innovative butterfly-shaped structure and vertically bent conductor sheet design, the antenna can maintain good performance in a wide frequency range of 600MHz to 3000MHz, with low reflection coefficient S11, which can significantly improve the operating bandwidth of the antenna and meet the application requirements of the very high frequency band.

[0021] 2. High radiation efficiency: The vertically bent structure optimizes the electromagnetic field distribution, and the optimized electromagnetic field distribution design enables the antenna to have high radiation efficiency and total efficiency in a wide frequency range, ensuring effective transmission and reception of signals.

[0022] 3. Miniaturized design: The antenna structure of the present utility model is compact, and the vertically bent structure realizes the extension of the electrical length in a limited physical size, meeting the demand of modern wireless communication equipment for miniaturization and integration.

[0023] 4. Low manufacturing cost: The design of the present utility model is simple, and conventional materials such as single-layer copper-clad rectangular dielectric substrate and vertically bent rectangular conductor sheet are used, which reduces the manufacturing cost and is conducive to large-scale production and application.

[0024] 5. The present utility model is suitable for various application scenarios such as wireless communication, Internet of Things, radar, etc., and has high practical value and wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of the present utility model.

[0026] Figure 2 is a butterfly-shaped radiation main body structure schematic diagram of the present utility model.

[0027] Figure 3 is a vertically bent rectangular conductor sheet structure schematic diagram of the present utility model.

[0028] Figure 4 is a coaxial feed line antenna end structure schematic diagram of the present utility model.

[0029] Figure 5 is a coaxial feed line power supply end structure schematic diagram of the present utility model.

[0030] Figure 6 is a simulation result of the radiation efficiency and total efficiency of the present utility model. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present utility model more clear and explicit, the present utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present utility model and do not limit the present utility model.

[0032] Referring toFigure 1 The utility model discloses a high frequency broadband antenna with bending structure, including butterfly plane radiator 1, vertical bending rectangular conductor piece 2, dielectric substrate 3, coaxial feeder 4.

[0033] Referring to Figure 2 Butterfly plane radiator 1 is made of copper layer material on dielectric substrate 3, and its shape is symmetric butterfly structure, which is made of a pair of symmetric upper base 12mm, lower base 160mm, high 59mm, the trapezoidal structure of both sides of butterfly structure is 2mm apart, the thickness of dielectric substrate 3 is 2mm, length is 120mm, and the width is 160mm, and the material with relative dielectric constant 3.87 is made.

[0034] Referring to Figure 3 Vertical bending rectangular conductor 2 is connected with butterfly plane radiator 1 on the upper surface of dielectric substrate 3 by welding, and its length is 3mm, width is 160mm, and height is 25mm, and it is combined with butterfly plane radiator 1 to form the basic high frequency antenna with bending structure.

[0035] Referring to Figure 4 Coaxial feeder 4 is used for the power supply of antenna, and in the connection antenna one end, the coaxial feeder 4 is perpendicular to butterfly plane radiator 1, and the length is 18mm, wherein the outer conductor is connected with the small conductor piece at the bottom of the substrate first, and then is connected with one side butterfly plane radiator 1 through a hole, and the inner conductor is directly connected with the other side butterfly plane radiator 1 through the substrate, to enhance the conductivity and stability.

[0036] Referring to Figure 5 Coaxial feeder 4 is curved and bent 90 degrees to be parallel to butterfly plane radiator 1, and the parallel length is 75mm.

[0037] Referring to Figure 6 The total efficiency of the embodiment antenna in the frequency range of 600-3000MHz is about-1dB, and the radiation efficiency is close to 0dB, which shows that the embodiment has higher radiation efficiency and total efficiency.

[0038] In summary, the embodiment optimizes the electromagnetic field distribution of the antenna through the combination design of butterfly plane radiator 1 and vertical bending rectangular conductor piece 2. The antenna can work in the ultra-high frequency range of 600MHz to 3GHz, has a wide frequency band coverage and high radiation efficiency, and is simple in design, low in manufacturing cost, and suitable for various application scenarios such as wireless communication, Internet of Things and radar.

[0039] The above embodiment is a preferred embodiment of the present application, but the embodiment of the present application is not limited by the above embodiment. Any change, modification, replacement, combination or simplification made without departing from the spirit and principle of the present application is an equivalent alternative, and is included in the protection scope of the present application. The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the changes and improvements of the present application also fall within the scope of protection.

Claims

1. A Tefra-band antenna with bending structure, characterized in that The butterfly-shaped planar radiator, the vertical bent conductor sheet, the dielectric substrate, and the vertical coaxial feed line are included. The butterfly-shaped planar radiator is a symmetrical butterfly-shaped structure and is made on a dielectric substrate with a single-layer copper-clad layer. The vertical bent conductor sheet is two, one end of each vertical bent conductor sheet is connected with a corresponding part of the butterfly-shaped planar radiator, and the two vertical bent conductor sheets and the butterfly-shaped planar radiator combine to form a basic antenna structure, which optimizes the electromagnetic field distribution of the antenna and improves the radiation efficiency and operating bandwidth of the antenna. The dielectric substrate is used to support the butterfly-shaped planar radiator and the vertical bent rectangular conductor sheet. One end of the vertical coaxial feed line is connected with a feed source, and the other end of the vertical coaxial feed line is connected with the butterfly-shaped planar radiator.

2. The TFB antenna with bending structure according to claim 1, characterized in that The dielectric substrate is rectangular.

3. The TFB antenna with bending structure according to claim 1, characterized in that The outer conductor of the vertical coaxial feed line is first connected with a small conductor sheet at the bottom of the substrate, and then connected with one side of the butterfly-shaped planar radiator through a hole.

4. The TFB antenna with bending structure according to claim 1, characterized in that The butterfly-shaped planar radiator is composed of a pair of symmetrical isosceles trapezoids.

5. The Tefra wideband antenna with bending structure according to claim 1, characterized in that The vertical bent conductor sheet is a rectangular structure.

6. The Tefra wideband antenna with bending structure according to claim 1, characterized in that The vertical bent conductor sheet is connected with the butterfly-shaped planar radiator on the upper surface of the dielectric substrate by welding.

7. The TFBW antenna with bent structure according to claim 1, characterized in that The coaxial feed line is vertically connected with the butterfly-shaped planar radiator at one end of the antenna, and is connected with the feed source through an SMA joint or other standard joint at the other end.

8. The TFB antenna with bending structure according to claim 1, characterized in that The coaxial feed line is bent by 90 degrees after vertical extension to be parallel to the butterfly-shaped planar radiator, forming a parallel section of the feed line.

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