Bluetooth antenna with structure shaped like Chinese character'hui 'based on composite dielectric base

Abstract

The utility model relates to a composite dielectric base-based dual-rectangular-shaped structure Bluetooth antenna, which comprises a radiation patch layer and a substrate, the radiation patch layer comprises a top dual-rectangular-shaped structure radiation patch layer and a bottom slotted radiation patch layer, and the substrate is a composite dielectric substrate. And the top-layer radiation patch layer with the concentric-square-shaped structure comprises a concentric-square-shaped bending part and a straight line part which form a whole and are arranged at the top of the composite dielectric substrate. The bottom slotted radiation patch layer is of a two-part structure which is symmetrically arranged, a gap exists between the two-part structure, and the bottom slotted radiation patch layer is arranged at the bottom of the composite dielectric substrate. Compared with the prior art, the composite dielectric with high dielectric constant is adopted as the substrate, so that the antenna has good toughness and processability; by adopting the resin-based medium, better processing performance can be achieved, and the problems of cracking of the substrate and the antenna in the processing process and the like can be reduced; the dual-rectangular-ambulatory-plane antenna adopts a dual-rectangular-ambulatory-plane structure, the capacitance value in the antenna can be increased, and the frequency can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency and antenna, in particular to a composite dielectric-based circular structure Bluetooth antenna. Background Art

[0002] Bluetooth is a radio technology that supports short-range communication between devices (generally within 10 meters). It can effectively simplify the communication between mobile communication terminal devices, including mobile phones, wireless headphones, laptops, etc., making data transmission faster and more efficient. Antennas, as an indispensable element in wireless communication, affect the communication distance. It is particularly important to design a high-performance Bluetooth antenna. At present, ceramic antennas are the main ones on the market, but ceramic antennas are poor in reliability and processability, and are prone to risks such as brittle fracture.

[0003] Therefore, there is an urgent need to design a miniaturized Bluetooth antenna that also has high performance. Utility Model Content

[0004] The purpose of the utility model is to provide a composite dielectric-based circular structure Bluetooth antenna to overcome the defects of the prior art. By using a composite dielectric with a high dielectric constant as a substrate, the prepared antenna has good radiation performance and reduces the cracking problem.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The utility model provides a composite dielectric-based U-shaped structure Bluetooth antenna, comprising a radiation patch layer and a substrate, wherein the radiation patch layer comprises a top U-shaped structure radiation patch layer and a bottom slotted radiation patch layer, and the substrate is a composite dielectric substrate;

[0007] The top U-shaped structure radiation patch layer includes a U-shaped bending part and a straight part, the U-shaped bending part and the straight part form a whole, and are both arranged on the top of the composite dielectric substrate;

[0008] The bottom slotted radiation patch layer is a symmetrically arranged two-part structure with a gap between the two parts. The bottom slotted radiation patch layer is arranged at the bottom of the composite dielectric substrate.

[0009] Furthermore, the top-layer circular structure radiation patch layer is a front-etched copper-clad board.

[0010] Furthermore, there is no conduction between the circular bending portion and the straight portion.

[0011] Furthermore, the dielectric constant of the composite dielectric substrate is (4-10)@5GHz.

[0012] Furthermore, the material of the composite dielectric substrate is a composite dielectric resin base.

[0013] Furthermore, two ends of the composite dielectric substrate are provided with through metallized vias, and the through metallized vias are used to conduct the top-layer circular structure radiation patch layer and the bottom-layer slotted radiation patch layer.

[0014] Furthermore, the sides of the two symmetrically arranged structures are both provided with arc-shaped opening structures, and the arc-shaped opening structures correspond to the through metallized vias.

[0015] Furthermore, the bottom slotted radiation patch layer is a reverse-etched copper-clad board.

[0016] Furthermore, solder pads are provided at both ends of the bottom layer of the Bluetooth antenna, and the solder pads are used to fix the Bluetooth antenna on a clear area of ​​a PCB (Printed Circuit Board).

[0017] Furthermore, the size of the Bluetooth antenna is 3.2 mm×1.6 mm×0.5 mm.

[0018] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0019] 1. The utility model adopts a composite medium with a high dielectric constant as a substrate, which has good toughness and processability, and the prepared antenna has good radiation performance. Compared with traditional ceramics, it has higher reliability during processing and use, and meets the use requirements while achieving miniaturization.

[0020] 2. The resin-based medium used in the present invention can have better processing performance, can reduce the problem of substrate cracking during the processing, and can also reduce the problem of antenna cracking due to falling during use.

[0021] 3. The utility model adopts a circular structure in terms of structure, which can increase the capacitance in the antenna, thereby reducing the frequency, or using a smaller clearance area to achieve the same antenna effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a composite dielectric-based circular structure Bluetooth antenna;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure of the middle and bottom slotted radiation patch layer;

[0024] Figure 3 for Figure 1 Structural diagram of the top middle and top circular structure radiation patch layer;

[0025] Figure 4 This is a schematic diagram of a composite dielectric-based circular structure Bluetooth antenna on a PCB board.

[0026] Figure 1 Description of the mark in:

[0027] 1-bottom slotted radiation patch layer, 2-through metallized vias, 3-composite dielectric substrate, 4-straight portion, 5-return-bend portion;

[0028] Figure 2 Description of the mark in:

[0029] 3-1-arc opening structure, 3-2-copper surface coverage length, 3-3 gap;

[0030] Figure 4 Description of the mark in:

[0031] 6-PCB board, 7-PCB clearance area. DETAILED DESCRIPTION

[0032] The specific implementation methods of the utility model are described in detail below through examples. These examples are implemented on the premise of the scheme described in the utility model, and provide detailed implementation methods and specific operating processes, but the protection scope of the utility model is not limited to the following examples.

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The features such as component models, material names, connection structures, etc. that are not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.

[0034] Example 1

[0035] This embodiment provides a composite dielectric-based Bluetooth antenna. Figure 1 As shown, it includes a radiation patch layer and a substrate, the radiation patch layer includes a top-layer circular structure radiation patch layer and a bottom-layer slotted radiation patch layer 1, and the substrate is a composite dielectric substrate 3.

[0036] like Figure 2 As shown, the bottom slotted radiation patch layer 1 is arranged at the bottom of the composite dielectric substrate 3. The bottom slotted radiation patch layer 1 is a reverse-etched copper-clad plate, which includes a symmetrically arranged left and right part structure, and the length of the copper surface covering is as shown in FIG. Figure 2 As shown in 3-2 in the figure, there is a gap 3-3 between the left and right parts. The sides of the left and right parts are both provided with arc-shaped opening structures 3-1, and the arc-shaped opening structures 3-1 correspond to the through metallized vias 2.

[0037] like Figure 3As shown in FIG. 1 , the top U-shaped structure radiation patch layer is a copper-clad plate etched on the front side, which includes a U-shaped bending portion 5 and a straight portion 4. The U-shaped bending portion 5 and the straight portion 4 form a whole and are arranged on the top of the composite dielectric substrate 3. There is no conduction between the U-shaped bending portion 5 and the straight portion 4. The top radiation patch layer is a "U-shaped" loop, as shown in FIG. Figure 3 As shown, 2-1, 2-5, 2-6, and 2-7 are the return bending parts 5, and 2-2, 2-3, 2-4, 2-8 to 2-14 are the straight parts 4. Both parts are on the top radiation patch layer, which are copper patches and form an overall plane. Among them, 2-4, 2-8, and 2-14 are parallel. The length of each copper wire is shown in Table 1. Due to the processing accuracy error, the line width and line spacing are allowed to have a deviation of ±10%.

[0038] Table 1 Detailed parameters of antenna structure

[0039]

[0040]

[0041] The dielectric constant of the composite dielectric substrate 3 is 8@5GHz, and its material is a composite dielectric resin-based, non-LTCC co-fired ceramic. The composite dielectric substrate 3 is based on resin, and is compounded with different particle sizes and filler types to achieve high dielectric while having good processability and reliability. The composite dielectric resin-based substrate is obtained by the preparation method in patent number CN114106558B, which is a prior art and will not be described here. Through metallized vias 2 are provided at both ends of the composite dielectric substrate 3, and the through metallized vias 2 are used to conduct the top-layer circular structure radiation patch layer and the bottom-layer slotted radiation patch layer 1 of the Bluetooth antenna.

[0042] The two ends of the bottom layer of the Bluetooth antenna are provided with soldering pads, which are used to fix the Bluetooth antenna on the clearance area of ​​the PCB (Printed Circuit Board). Figure 4 As shown, the thickness of the PCB board is 1mm, and the boundary of the PCB clearance area is the etching boundary of the bottom slotted radiation patch layer on the PCB board. The size of the PCB clearance area is 5*6mm, and the center frequency of the obtained antenna is 2.45GHz. The size of the Bluetooth antenna is 3.2mm×1.6mm×0.5mm. The PCB clearance area is connected to the Bluetooth antenna board by reflow soldering, so that the Bluetooth antenna and the PCB clearance area form a whole, and the final resonant frequency of the Bluetooth antenna is 2.45GHz. In addition, a layer of solder mask with a thickness of 20-50μm can be covered on the top-layer circular structure radiation patch layer and the bottom-layer slotted radiation patch layer 1 to prevent the Bluetooth antenna from oxidizing.

[0043] By using a composite medium with a high dielectric constant as the substrate, which has good toughness and processability, the prepared antenna has good radiation performance. Compared with traditional ceramics, it has higher reliability during processing and use, and meets the use requirements while achieving miniaturization. The use of resin-based media can have better processing performance, can reduce the problem of substrate cracking during processing, and at the same time reduce the problem of antenna cracking due to falling during use. In terms of structure, the use of a circular structure can increase the capacitance in the antenna, thereby reducing the frequency, or using a smaller clearance area to achieve the same antenna effect.

[0044] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A composite dielectric-based Bluetooth antenna with a circular structure, comprising a radiation patch layer and a substrate, characterized in that: The radiation patch layer comprises a top circular structure radiation patch layer and a bottom slotted radiation patch layer (1), and the substrate is a composite dielectric substrate (3); The top-layer circular structure radiation patch layer comprises a circular bending portion (5) and a straight portion (4), wherein the circular bending portion (5) and the straight portion (4) form a whole and are both arranged on the top of the composite dielectric substrate (3); The bottom slotted radiation patch layer (1) is a two-part structure that is symmetrically arranged, and there is a gap (3-3) between the two parts of the structure. The bottom slotted radiation patch layer (1) is arranged at the bottom of the composite medium substrate (3).

2. The composite dielectric-based Bluetooth antenna according to claim 1, characterized in that: The top-layer circular structure radiation patch layer is a copper-clad plate etched on the front side.

3. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: There is no conduction between the circular bending portion (5) and the straight portion (4).

4. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: The dielectric constant of the composite dielectric substrate (3) is (4-10)@5GHz.

5. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: The material of the composite medium substrate (3) is a composite medium resin base.

6. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: Both ends of the composite dielectric substrate (3) are provided with through metallized vias (2), and the through metallized vias (2) are used to conduct the top-layer circular structure radiation patch layer and the bottom-layer slotted radiation patch layer (1).

7. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: The sides of the two symmetrically arranged structures are both provided with arc-shaped opening structures (3-1), and the arc-shaped opening structures (3-1) correspond to the through metallized vias (2).

8. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: The bottom slotted radiation patch layer (1) is a copper-clad plate with reverse etching.

9. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: Solder pads are arranged at two ends of the bottom layer of the Bluetooth antenna, and the solder pads are used to fix the Bluetooth antenna on the clearance area of ​​the PCB board.

10. The composite dielectric-based circular structure Bluetooth antenna according to claim 1, characterized in that: The size of the Bluetooth antenna is 3.2 mm×1.6 mm×0.5 mm.

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