Positioning antenna structure

Abstract

The utility model relates to a positioning antenna structure, which comprises a printed circuit board, a first radiation sheet and a second radiation sheet are arranged on the front surface of the printed circuit board, a third radiation sheet is arranged on the back surface of the printed circuit board, and the first radiation sheet is connected with the third radiation sheet through a via hole on the printed circuit board; an antenna feed point bonding pad is arranged on the third radiation sheet, a bracket feed point bonding pad which is correspondingly welded and conducted with the antenna feed point bonding pad is arranged on one end face of the main bracket, and the bracket feed point bonding pad is welded and conducted on a corresponding equipment mainboard through a feed point pin bonding pad on the other end face of the main bracket; the second radiation sheet is connected with an antenna feed point welding pad located on the back face of the printed circuit board through a via hole, and the antenna feed point welding pad is connected with a corresponding equipment mainboard through a feed support. The utility model has the advantages of simple structure and manufacture procedure, high production efficiency and yield, good structural reliability, lower cost, greatly reduced weight and better anti-drop reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a positioning antenna structure. Background Art

[0002] With the development of science and technology, positioning technology has been applied to all walks of life in modern life. For example, in the fields of mobile phone positioning, route navigation, surveying and mapping, drones, etc., positioning technology can be seen everywhere, and the market demand is also increasing. In order to meet the application requirements of high-precision positioning, antennas often require higher height dimensions to meet performance requirements. At present, the market mainly adopts multi-layer printed circuit board stacking solutions or ceramic solutions. If multi-layer stacked printed circuit boards are used, the processing and manufacturing costs are high, the dimensional accuracy is poor, and the performance stability is difficult to control; if the ceramic solution is used, the process is complicated, the cost is high, and the product weight is heavy, and the anti-drop reliability is poor. Utility Model Content

[0003] The purpose of the utility model is to overcome the problems existing in the prior art and provide a positioning antenna structure, which reduces weight, simplifies manufacturing process and reduces cost while ensuring performance.

[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0005] A positioning antenna structure includes a printed circuit board, a main bracket, a feeding bracket, a first radiation sheet, a second radiation sheet and a third radiation sheet, wherein:

[0006] The first radiation sheet and the second radiation sheet are arranged on the front side of the printed circuit board, and the third radiation sheet is arranged on the back side of the printed circuit board. The first radiation sheet and the third radiation sheet are conductively connected through a plurality of conductive holes on the printed circuit board.

[0007] The third radiation piece is provided with an antenna feeding ground pad, one end surface of the main bracket is provided with a bracket feeding ground pad corresponding to the antenna feeding ground pad, and the bracket feeding ground pad is welded and connected to the corresponding device mainboard through the feeding ground pin pad on the other end surface of the main bracket;

[0008] The second radiation plate is connected to the antenna feed point pad located on the back of the printed circuit board through a conducting hole, and the antenna feed point pad is connected to the corresponding device mainboard through a feeding bracket.

[0009] Furthermore, two ends of the feeding bracket are provided with bracket feeding point pads and feeding point pin pads that are connected to each other, the bracket feeding point pads are correspondingly welded and connected with the antenna feeding point pads, and the feeding point pin pads are welded and connected on the corresponding device mainboard.

[0010] Furthermore, the feeding bracket is temporarily fixed to the main bracket by an auxiliary connecting member to facilitate the positioning and welding process together, and is removed after the welding between the main bracket, the feeding bracket and the corresponding radiation plate on the printed circuit board is completed.

[0011] Furthermore, the main bracket and the feeding bracket are sheet metal parts.

[0012] Furthermore, the first radiation sheet is a parasitic branch of the antenna, which is respectively arranged on each edge of the front side of the printed circuit board.

[0013] Furthermore, the second radiation plates are a pair of antenna radiators and are located in the front area of ​​the printed circuit board surrounded by the first radiation plates.

[0014] Furthermore, the third radiation piece is a parasitic branch of the antenna, which is respectively arranged on each edge of the back side of the printed circuit board and directly faces the first radiation piece across the printed circuit board.

[0015] The beneficial effects of the utility model are:

[0016] The printed circuit board of the utility model is connected to the main bracket and the feeding bracket by welding, and the manufacturing process is simple, the production efficiency and yield are high, the structural reliability is good, and the cost is low. At the same time, compared with the positioning antenna using a ceramic solution, the weight is greatly reduced, and the anti-drop reliability is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the three-view drawing of the antenna of the utility model after assembly;

[0018] Figure 2 This is a front oblique perspective view of the utility model antenna after assembly;

[0019] Figure 3 This is a three-dimensional view of the back side of the antenna of the utility model after assembly;

[0020] Figure 4 It is a front projection schematic diagram of the printed circuit board of the utility model;

[0021] Figure 5 It is a back projection schematic diagram of the printed circuit board of the utility model;

[0022] Figure 6 This is a three-dimensional oblique view of the upper end surface of the main bracket of the utility model;

[0023] Figure 7 This is a three-dimensional oblique view of the lower end surface of the main bracket of the utility model;

[0024] Figure 8 It is a structural schematic diagram of the utility model in which the feeding bracket is temporarily fixed to the main bracket through the auxiliary connecting member;

[0025] Fig. 9 It is the return loss diagram of the antenna of the utility model;

[0026] Fig.10 It is the GPS L2 frequency right-hand / left-hand circular polarization gain diagram of the utility model antenna;

[0027] Fig.11 This is the GPS L1 frequency right-hand / left-hand circular polarization gain diagram of the antenna of the utility model.

[0028] Explanation of the numbers in the figure: 1. Printed circuit board, 11. First radiation plate, 12. Second radiation plate, 121. Antenna feed point pad, 13. Third radiation plate, 131. Antenna feed point pad, 111. Through hole, 2. Main bracket, 21. Bracket feed point pad, 22. Feed point pin pad, 3. Feed bracket, 31. Bracket feed point pad, 32. Feed point pin pad, 4. Auxiliary connecting component. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] like Figures 1 to 7 As shown, a positioning antenna structure includes a printed circuit board 1, a main bracket 2, a feeding bracket 3, a first radiation plate 11, a second radiation plate 12 and a third radiation plate 13, wherein:

[0031] The first radiation sheet 11 and the second radiation sheet 12 are arranged on the front side of the printed circuit board 1, and the third radiation sheet 13 is arranged on the back side of the printed circuit board 1. The first radiation sheet 11 and the third radiation sheet 13 are conductively connected through a plurality of conductive holes 111 on the printed circuit board 1.

[0032] The third radiation plate 13 is provided with an antenna feeding ground pad 131, and one end surface of the main bracket 2 is provided with a bracket feeding ground pad 21 corresponding to the antenna feeding ground pad 131 and welded and connected, and the bracket feeding ground pad 21 is welded and connected to the corresponding device mainboard through the feeding ground pin pad 22 on the other end surface of the main bracket 2;

[0033] The second radiation sheet 12 is connected to the antenna feed point pad 121 located on the back of the printed circuit board 1 through the via 111 , and the antenna feed point pad 121 is connected to the corresponding device mainboard through the feeding bracket 3 .

[0034] like Figure 6 and Figure 7As shown, two ends of the feeding bracket 3 are provided with a bracket feeding point pad 31 and a feeding point pin pad 32 which are connected to each other. The feeding bracket 3 also adopts a sheet metal part, which itself has conductivity, so that the bracket feeding point pad 31 and the feeding point pin pad 32 are directly connected. The bracket feeding point pad 31 is welded and connected with the antenna feeding point pad 121 correspondingly, and the feeding point pin pad 32 is welded and connected on the corresponding device mainboard.

[0035] like Figure 8 As shown, the feeding bracket 3 is temporarily fixed on the main bracket 2 by an auxiliary connecting member 4, which is convenient for positioning and welding process together, and is removed after welding between the main bracket 2, the feeding bracket 3 and the corresponding radiation plate on the printed circuit board 1 is completed. In the specific implementation of production, the number of printed circuit boards 1, main brackets 2, and feeding brackets 3 can be single or multiple, and the shapes of the printed circuit boards 1, main brackets 2, and feeding brackets 3 themselves can be diversified, such as circular, rectangular, irregular, etc. The number of each feeding point and feeding point can be single or multiple. In actual production, the auxiliary connecting member 4 can connect multiple independent main brackets 2 and feeding brackets 3 into a whole to simplify materials and processes. After the process is completed, it can be easily removed to further reduce costs.

[0036] The main bracket 2 and the feeding bracket 3 are sheet metal parts.

[0037] like Figure 4 As shown, the first radiation sheet 11 is a parasitic branch of the antenna, which is respectively arranged at each edge of the front side of the printed circuit board 1.

[0038] The second radiation plates 12 are a pair of antenna radiators and are located in the front area of ​​the printed circuit board 1 surrounded by the first radiation plates 11 .

[0039] like Figure 5 As shown, the third radiation plate 13 is a parasitic branch of the antenna, which is respectively arranged at each edge of the back side of the printed circuit board 1 and is opposite to the first radiation plate 11 across the printed circuit board 1 .

[0040] like Fig. 9 As shown in the figure, s11 is feed 1, s22 is feed 2, and the return loss of the two feeds is around -5dB. Because a good gain is required, the frequency is not selected at the best point in this example.

[0041] like Fig.10 As shown, the right-hand circular polarization is currently more than 6dB larger than the left-hand circular polarization. In such a low frequency band and in the current very small size, this is a better right-hand circular polarization.

[0042] like Fig.11As shown, right-hand circular polarization is more than 30dB larger than left-hand circular polarization, which is a very excellent performance under the current size. In addition, the GPS L1 frequency band plays a major role in currently commonly used devices. The better the performance, the more accurate the positioning function of the device.

[0043] In addition, it should be noted that, unless otherwise specified or indicated, the terms "first", "second", "third", etc. in the specification are only used to distinguish the various components, elements, steps, etc. in the specification, and are not used to indicate the logical relationship or sequential relationship between the various components, elements, steps, etc.

[0044] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A positioning antenna structure, characterized in that: The structure comprises a printed circuit board (1), a main support (2), a feeding support (3), a first radiation sheet (11), a second radiation sheet (12) and a third radiation sheet (13), wherein: The first radiation sheet (11) and the second radiation sheet (12) are arranged on the front side of the printed circuit board (1), and the third radiation sheet (13) is arranged on the back side of the printed circuit board (1); the first radiation sheet (11) and the third radiation sheet (13) are conductively connected via a plurality of conductive holes (111) on the printed circuit board (1); An antenna feeding ground pad (131) is provided on the third radiation sheet (13); a bracket feeding ground pad (21) corresponding to the antenna feeding ground pad (131) is provided on one end surface of the main bracket (2); the bracket feeding ground pad (21) is welded and connected to the corresponding device mainboard via a feeding ground pin pad (22) on the other end surface of the main bracket (2); The second radiation sheet (12) is connected to an antenna feed point pad (121) located on the back of the printed circuit board (1) via a via hole (111), and the antenna feed point pad (121) is connected to a corresponding device mainboard via a feed bracket (3).

2. The positioning antenna structure according to claim 1, characterized in that: Two ends of the feeding bracket (3) are provided with bracket feeding point pads (31) and feeding point pin pads (32) that are connected to each other, the bracket feeding point pads (31) and the antenna feeding point pads (121) are correspondingly welded and connected, and the feeding point pin pads (32) are welded and connected on the corresponding device mainboard.

3. The positioning antenna structure according to claim 2, characterized in that: The feeding bracket (3) is temporarily fixed to the main bracket (2) via an auxiliary material connecting member (4) to facilitate the joint positioning and welding process, and is removed after welding between the main bracket (2), the feeding bracket (3) and the corresponding radiation sheet on the printed circuit board (1) is completed.

4. The positioning antenna structure according to claim 3, characterized in that: The main bracket (2) and the feeding bracket (3) are sheet metal parts.

5. The positioning antenna structure according to claim 3, characterized in that: The first radiation sheet (11) is a parasitic branch of the antenna and is respectively arranged on each edge of the front side of the printed circuit board (1).

6. The positioning antenna structure according to claim 4, characterized in that: The second radiation sheet (12) is a pair of antenna radiators and is located in the front area of ​​the printed circuit board (1) surrounded by the first radiation sheet (11).

7. The positioning antenna structure according to claim 4, characterized in that: The third radiation sheet (13) is a parasitic branch of the antenna, and is respectively arranged on each edge of the back side of the printed circuit board (1) and is directly opposite to the first radiation sheet (11) across the printed circuit board (1).

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