Full-band coupled feed patch antenna

Abstract

The utility model discloses a full-band coupled feed patch antenna, which is characterized in that the outer edge part of a middle-layer FR4 dielectric plate is provided with a plurality of grounding Pin needle fixing holes; the shapes of the upper-layer metal patch and the lower-layer metal patch are equal-proportion reduction of the shape of the middle-layer FR4 dielectric plate; the edge part of the upper-layer metal patch is provided with a microstrip line, and the outer edge of the lower-layer metal patch is opposite to the inner edge of the microstrip line; a plurality of short-circuit columns are arranged between the upper-layer metal patch and the lower-layer metal patch; the upper layer metal patch and the lower layer metal patch are provided with rectangular grooves along two ends of the mutually vertical center-passing radial direction, and a coupling feed ring structure is arranged at an included angle of two adjacent rectangular grooves at the middle part of the upper layer metal patch and the lower layer metal patch. According to the utility model, through the design of the coupling feed, the short circuit point, the adjustable slit microstrip line and the peripheral Pin, compared with a traditional full-band antenna, the antenna is smaller in size, more excellent in performance and more convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and in particular to a full-band coupled-fed patch antenna. Background Art

[0002] In recent years, the role of the global navigation satellite system (GNSS) in national security, economy and social development has been very significant. Major powers in the world have competed to develop independent satellite navigation and positioning systems, and almost all satellite navigation systems have entered a stage of rapid development. The development of satellite navigation systems has driven the intelligent development of various industries, and technologies such as artificial intelligence, remote control, and intelligent vehicle driving are constantly updated.

[0003] The vigorous development of various industries has brought a large number of antenna demands. In order to keep up with the pace of the times, existing GPS & Beidou antennas and communication antennas not only need to be optimized in terms of performance and structure, but also need to control costs, and at the same time, the performance needs to be improved. Due to reasons such as manufacturing processes and processing cycles, the cost of ceramic chips in traditional GPS / Beidou antennas and communication antennas is slightly high when there is a large demand. In addition, traditional GPS / Beidou antennas use ceramics as the medium and silver paste as the receiving surface. During the assembly and welding processes, it is easy to cause scratches on the silver paste surface, and the silver paste on it is directly connected to the Pin holes, which leads to easy damage to the silver paste surface during the welding process, resulting in poor performance. Moreover, the fixing method of the ceramic chip to the RF PCB main board is mainly by pasting double-sided tape or using screws and nuts for fixing, which increases labor costs and is complex to assemble.

[0004] Therefore, developing a full-band coupled-fed patch antenna with a simple structure, convenient assembly and excellent performance is an urgent technical problem to be solved. Summary of the Utility Model

[0005] Due to the above-mentioned defects in the prior art, the utility model provides a full-band coupled-fed patch antenna. Through the design of coupled feeding, short connection points, adjustable slot microstrip lines and peripheral Pin pins, it is smaller in size, more stable in structure and superior in performance compared with traditional full-band antennas.

[0006] To achieve the above object, the utility model provides a full-band coupled-fed patch antenna, which includes a concentric middle-layer FR4 dielectric board and upper and lower metal patches arranged on its upper and lower surfaces; characterized in that,

[0007] A plurality of grounding Pin pin fixing holes are provided at the outer edge of the middle-layer FR4 dielectric board; the shapes of the upper and lower metal patches are proportional reductions of the shape of the middle-layer FR4 dielectric board;

[0008] The edge of the upper metal patch is provided with a microstrip line, and the outer edge of the lower metal patch is opposite to the inner edge of the microstrip line; a plurality of shorting posts are provided between the upper metal patch and the lower metal patch; both the upper metal patch and the lower metal patch are provided with rectangular slots along the two radial ends perpendicular to each other, and a coupled feed loop structure is provided at the middle part and at the included angle between two adjacent rectangular slots.

[0009] Further, the outer peripheries of the middle FR4 dielectric board, the upper metal patch and the lower metal patch are petal-shaped; the shorting posts are arranged at the protruding parts of each petal.

[0010] Further, the number of petals of the petal shape is 8.

[0011] Further, the number of the shorting posts arranged at the adjacent petals of the upper metal patch and the lower metal patch is one and two respectively. By precisely adjusting the number and position of the shorting points placed on the antenna, the fine-tuning of the working state of the device can be realized, and the full-band stability of the device can be improved.

[0012] Further, one grounding Pin hole is arranged at the protruding part of each petal of the middle FR4 dielectric board. The layout of the peripheral pins can also be adjusted and optimized according to actual requirements.

[0013] Further, the grounding Pin is directly connected to the RF circuit main board through the grounding Pin hole. In this way, the assembly is simpler and more convenient, and the peripheral pins are equivalent to a choke coil, which can generate an anti-multipath effect.

[0014] Further, the coupled feed loop structure includes a first through hole opened on the upper metal patch, a second through hole opened on the lower metal patch, and a metallized via hole opened on the middle FR4 dielectric board; the first through hole, the second through hole and the metallized via hole are concentric, the diameter of the second through hole is larger than that of the first through hole, and the diameter of the metallized via hole is between the second through hole and the first through hole.

[0015] Further, the support post passes through the first through hole, the second through hole and the metallized via hole to connect the coupled feed patch antenna and the RF circuit main board, and conducts the signal received by the coupled feed patch antenna to the RF circuit main board.

[0016] Compared with the prior art, the utility model has the following advantages or beneficial effects:

[0017] (1) The coupled-feed patch antenna of the present utility model realizes the transmission of microwave signals by means of coupled feed, simplifies the feeding structure, reduces the manufacturing cost, has good heat dissipation effect and wider bandwidth. By setting microstrip lines, the flatness of all low-frequency points is optimized, making the antenna have better consistency and high frequency stability. The upper and lower layers of metal are connected by short joints, covering all the frequency bands of Beidou / GPS high frequency and low frequency, ensuring the communication quality.

[0018] (2) The coupled-feed patch antenna of the present utility model adopts an optimized layout and connection method of peripheral pin pins, ensuring the stable connection between the device and external equipment, improving the reliability of the system, and the frequency deviation can also be corrected by the length of the pin pins and the holes on the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present utility model and its features, appearance and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present utility model.

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the coupled-feed patch antenna in an embodiment of the present utility model;

[0021] Figure 2 It is a top view schematic diagram of the overall structure of the coupled-feed patch antenna in an embodiment of the present utility model;

[0022] Figure 3 It is a top view schematic diagram of the middle FR4 dielectric board of the coupled-feed patch antenna in an embodiment of the present utility model;

[0023] Figure 4 It is a three-dimensional schematic diagram of the two-layer metal patch of the coupled-feed patch antenna in an embodiment of the present utility model;

[0024] Figure 5 It is a top view schematic diagram of the two-layer metal patch of the coupled-feed patch antenna in an embodiment of the present utility model;

[0025] Figure 6 It is a side view schematic diagram of the two-layer metal patch of the coupled-feed patch antenna in an embodiment of the present utility model;

[0026] Figure 7 It is a bottom view schematic diagram of the two-layer metal patch of the coupled-feed patch antenna in an embodiment of the present utility model;

[0027] Figure 8 It is a three-dimensional schematic diagram of the upper-layer metal patch of the coupled-feed patch antenna in an embodiment of the present utility model;

[0028] Figure 9Schematic three-dimensional view of the lower metal patch of the coupled-feed patch antenna in an embodiment of the present utility model;

[0029] Figure 10 Schematic three-dimensional view of the coupled-feed patch antenna during use in an embodiment of the present utility model;

[0030] Figure 11 Top view schematic of the coupled-feed patch antenna during use in an embodiment of the present utility model;

[0031] Figure 12 Side view schematic of the coupled-feed patch antenna during use in an embodiment of the present utility model;

[0032] Wherein, 11, upper metal patch; 12, middle FR4 dielectric board; 13, lower metal patch; 14, shorting post; 21, microstrip line; 22, rectangular groove; 23, coupled-feed ring structure; 31, support post; 32, RF circuit main board; 41, grounding Pin; 121, grounding Pin fixing hole; 231, first through hole; 232, second through hole; 233, metallized via hole. Detailed implementation manners

[0033] The exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. It should be understood that all these described exemplary embodiments are only partial embodiments and examples of the present utility model, rather than all of them. On the contrary, these exemplary embodiments are provided so that those skilled in the art can understand the present disclosure more thoroughly and can convey the technical content of the present disclosure more completely to those skilled in the art.

[0034] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present application, the meaning of "several" is two or more, unless otherwise specifically defined. In addition, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation, so it cannot be construed as a limitation to the present utility model. In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that well-known electronic devices or circuit configurations are not described in detail to avoid obscuring the gist of the present utility model.

[0035] Embodiment

[0036] See Figures 1 to 9, this embodiment provides a full-band coupled-feed patch antenna, which includes a concentric middle-layer FR4 dielectric board 12 and upper-layer metal patches 11 and lower-layer metal patches 13 disposed on its upper and lower surfaces; several grounding Pin-hole fixing holes 121 are provided at the outer edge of the middle-layer FR4 dielectric board 12; the shapes of the upper-layer metal patches 11 and the lower-layer metal patches 13 are proportional reductions of the shape of the middle-layer FR4 dielectric board 12; a microstrip line 21 is opened at the edge of the upper-layer metal patch 11, and the outer edge of the lower-layer metal patch 13 is aligned with the inner edge of the microstrip line 21; several shorting posts 14 are provided between the upper-layer metal patches 11 and the lower-layer metal patches 13; both the upper-layer metal patches 11 and the lower-layer metal patches 13 are provided with rectangular slots 22 along the radial ends perpendicular to each other through the center, and a coupled-feed ring structure 23 is provided at the middle part and at the angle between two adjacent rectangular slots 22. The rectangular slot 22 area is not copper-plated to isolate the copper skin.

[0037] The coupled-feed patch antenna synthesizes metal radiation plates with high and low frequency responses on a single patch antenna by using shorting posts, so as to cover the full band; uses the coupled-feed in the middle to increase the bandwidth, enhance the antenna performance, and improve the in-band flatness; by adjusting the width of the microstrip line at the edge, the optimization of high and low frequencies can be realized, and the in-band flatness can be improved; a Pin is introduced at the periphery, one end is connected to the antenna to adjust the frequency offset, and the other end is connected to the RF PCB main board, so that the peripheral circuit is connected to the internal circuit of the device body, which not only realizes the connection and fixation between the device and external equipment, but also can adjust the frequency offset by adjusting the position in the grounding Pin-hole fixing hole. During installation, since the diameters of the Pin-hole and the via are in proportion, compared with the full-band ceramic antenna, the installation is more convenient and fast, greatly saving labor costs and material costs, and reducing factors such as production and later assembly efficiency.

[0038] As a preferred embodiment, further: the outer peripheries of the middle-layer FR4 dielectric board 12, the upper-layer metal patches 11 and the lower-layer metal patches 13 are petal-shaped; the shorting posts 14 are disposed at the protruding parts of each petal. Such a shape can ensure that the gains at the lowest and highest points in the corresponding frequency band are the same, thus ensuring the flatness consistency throughout the band and optimizing the frequency offset.

[0039] As a preferred embodiment, further: the number of petals of the petal shape is 8.

[0040] As a preferred embodiment, further: the number of shorting posts 14 provided for adjacent petals of the upper-layer metal patches 11 and the lower-layer metal patches 13 is one and two respectively. By precisely adjusting the number and position of the shorting points placed on the antenna, the fine adjustment of the working state of the device can be realized, and the full-band stability of the device can be improved.

[0041] As a preferred embodiment, further: One grounding Pin hole 121 is provided at the protruding part of each petal of the middle FR4 dielectric board 12. The layout of the peripheral pins can also be adjusted and optimized according to actual requirements.

[0042] As a preferred embodiment, further: Refer to Figures 10 to 12 , the grounding Pin 41 is directly connected to the RF circuit main board 32 through the grounding Pin hole 121. In this way, the assembly is simpler and more convenient. The peripheral pins are equivalent to a choke coil and can generate an anti-multipath effect.

[0043] As a preferred embodiment, further: The coupled feed loop structure 23 includes a first through hole 231 formed in the upper metal patch 11, a second through hole 232 formed in the lower metal patch 13, and a metallized via 233 formed in the middle FR4 dielectric board 12; the first through hole 231, the second through hole 232, and the metallized via 233 are concentric. The diameter of the second through hole 232 is larger than that of the first through hole 231, and the diameter of the metallized via 233 is between the second through hole 232 and the first through hole 231.

[0044] As a preferred embodiment, further: Refer to Figures 10 to 12 , the support column 31 passes through the first through hole 231, the second through hole 232, and the metallized via 233 to connect the coupled feed patch antenna and the RF circuit main board 32, and conducts the signal received by the coupled feed patch antenna to the RF circuit main board 32. On the one hand, the coupled feed loop structure 23 provides a transmission channel for microwave signals, increasing the bandwidth of the microwave signals. On the other hand, the support column 31 plays a role in fixing the antenna height.

[0045] The antenna of this embodiment can be adjusted and optimized according to actual requirements, including but not limited to the design of the coupled feed structure, the layout and connection line adjustment of the short circuit points, the shape and size of the slot structure, the number and layout of the peripheral pins, etc. During specific implementation, various parameters can be accurately calculated and optimized according to parameters such as the operating frequency band and power requirement of the microwave device to achieve the best performance.

[0046] In summary, the present utility model provides a full-band coupled-fed patch antenna, which is characterized in that a plurality of grounding Pin pin fixing holes are provided at the outer edge of the middle FR4 dielectric board; the shapes of the upper metal patch and the lower metal patch are proportional reductions of the shape of the middle FR4 dielectric board; a microstrip line is provided at the edge of the upper metal patch, and the outer edge of the lower metal patch is aligned with the inner edge of the microstrip line; a plurality of shorting posts are provided between the upper metal patch and the lower metal patch; both the upper metal patch and the lower metal patch are provided with rectangular slots along the radial two ends passing through the center and perpendicular to each other, and a coupled-feed loop structure is provided at the middle part and at the included angle between two adjacent rectangular slots. Through the design of coupled feed, shorting points, adjustable-slit microstrip lines and peripheral pins, the present utility model is smaller in size, superior in performance and more convenient to install compared with traditional full-band antennas.

[0047] The preferred embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific embodiments, and the devices and structures not described in detail therein should be understood to be implemented in a common manner in the art; any person skilled in the art can, without departing from the scope of the technical solution of the present utility model, make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of the protection of the technical solution of the present utility model.

Claims

1. A full-band coupled-fed patch antenna, comprising a concentric middle-layer FR4 dielectric board (12) and an upper-layer metal patch (11) and a lower-layer metal patch (13) provided on its upper and lower surfaces; characterized in that, a plurality of ground Pin pin fixing holes (121) are provided at the outer edge of the middle-layer FR4 dielectric board (12); the shapes of the upper-layer metal patch (11) and the lower-layer metal patch (13) are proportional reductions of the shape of the middle-layer FR4 dielectric board (12); a microstrip line (21) is provided at the edge of the upper-layer metal patch (11), and the outer edge of the lower-layer metal patch (13) is aligned with the inner edge of the microstrip line (21); a plurality of shorting posts (14) are provided between the upper-layer metal patch (11) and the lower-layer metal patch (13); rectangular slots (22) are provided at both ends of the upper-layer metal patch (11) and the lower-layer metal patch (13) along the radial direction passing through the center and perpendicular to each other, and a coupled-feed ring structure (23) is provided at the angle between two adjacent rectangular slots (22) in the middle.

2. The all-band coupled-fed patch antenna according to claim 1, wherein The outer peripheries of the middle-layer FR4 dielectric board (12), the upper-layer metal patch (11) and the lower-layer metal patch (13) are petal-shaped; the shorting posts (14) are provided at the protruding parts of each petal.

3. The all-band coupled-fed patch antenna according to claim 2, characterized in that, The number of petals of the petal shape is 8.

4. A full-band coupled-feed patch antenna according to claim 2, wherein, The shorting posts (14) provided between the adjacent petals of the upper-layer metal patch (11) and the lower-layer metal patch (13) are one and two respectively.

5. A full-band coupled-fed patch antenna according to claim 1, characterized in that, One ground Pin pin fixing hole (121) is provided at the protruding part of each petal of the middle-layer FR4 dielectric board (12).

6. The all-band coupled-feed patch antenna according to claim 5, wherein The ground Pin pin (41) is directly connected to the RF circuit main board (32) through the ground Pin pin fixing hole (121).

7. A full-band coupled-feed patch antenna according to claim 1 or 2, characterized in that, The coupled-feed ring structure (23) includes a first through hole (231) provided on the upper-layer metal patch (11), a second through hole (232) provided on the lower-layer metal patch (13), and a metallized via hole (233) provided on the middle-layer FR4 dielectric board (12); the first through hole (231), the second through hole (232) and the metallized via hole (233) are concentric, the diameter of the second through hole (232) is larger than that of the first through hole (231), and the diameter of the metallized via hole (233) is between the second through hole (232) and the first through hole (231).

8. The all-band coupled-fed patch antenna according to claim 7, characterized in that, The support post (31) passes through the first through hole (231), the second through hole (232) and the metallized via hole (233) to connect the coupled-fed patch antenna and the RF circuit main board (32), and conduct the signal received by the coupled-fed patch antenna to the RF circuit main board (32).

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