A patchable ultra-wideband omni-directional vertical antenna

Abstract

The utility model discloses a kind of patchable ultra-wideband omnidirectional vertical antennas, including circuit board and antenna module, circuit board includes top layer and bottom layer, top layer is equipped with microstrip line;Antenna module includes connecting portion, transition portion and horizontal portion, the bottom of connecting portion and microstrip line are attached connection, top and transition portion are connected;Among them, the middle part of microstrip line is equipped with feed point, for generating first current mode;The both ends of microstrip line are grounded, for generating second current mode. Thus, by double-mode resonance, so that antenna forms impedance ultra-wideband effect in wideband range, with excellent frequency band coverage ability, realize ch5 to ch9 frequency band full coverage, in the entire covered frequency range can radiate omnidirectional pure linear polarization signal, solve the problem of insufficient bandwidth of prior art. Moreover, by the above structural design mode, the requirement of patch technology can be met, large-scale automated production is realized, manpower cost and the failure rate in production process are reduced, the quality and performance stability of antenna product are improved.

Description

Technical Field

[0001] This utility model relates to the field of patch antenna technology, and in particular to a patchable ultra-wideband omnidirectional vertical antenna. Background Technology

[0002] UWB (Ultra-Wideband) antennas are characterized by high data transmission rates, strong anti-interference capabilities, and high positioning accuracy, and are widely used in consumer electronics, automotive, and industrial IoT fields.

[0003] Due to cost or space constraints, most existing UWB antennas are PCB-printed antennas. Because the PCB board itself obstructs the radiation, PCB-printed antennas cannot achieve good pure linear polarization omnidirectional radiation, resulting in gain dips in certain directions and short communication distances at certain angles. Alternatively, existing technologies also employ vertical iron antennas designed outside the PCB, which can alleviate some of the problems associated with PCB-printed antennas, but also has the following drawbacks:

[0004] 1. In terms of bandwidth, vertical iron antennas have the problem of narrow bandwidth, often only meeting the 500MHz communication bandwidth of CH5 or CH9, and cannot meet the product requirements of both CH5 and CH9 at the same time.

[0005] 2. In terms of manufacturing process, most vertical iron antennas cannot meet the requirements of surface mount technology (SMT) and other surface mount processes, requiring manual soldering, which results in high labor costs and poor soldering consistency, affecting the quality of antenna products.

[0006] Overall, both existing UWB antenna types have their own limitations, affecting their performance and production efficiency in practical applications. Therefore, how to further optimize and improve UWB antennas is a key issue that needs to be addressed. Utility Model Content

[0007] To overcome the technical problems of poor antenna radiation field shape, narrow bandwidth, or inability to meet patch manufacturing process requirements mentioned above in the prior art, this utility model provides a patchable ultra-wideband omnidirectional vertical antenna. This patchable ultra-wideband omnidirectional vertical antenna has excellent frequency band coverage capability, can achieve full coverage from CH5 to CH9 frequency bands, radiates omnidirectional pure linear polarized signals within the frequency band range, has low antenna field shape non-circularity, and can realize various types of patch manufacturing processes without manual soldering, thus reducing costs.

[0008] The technical solution adopted by this utility model to solve its problem is:

[0009] A patchable ultrawideband omnidirectional vertical antenna, comprising:

[0010] A circuit board, comprising a top layer and a bottom layer, wherein the top layer is provided with microstrip lines;

[0011] The antenna module includes a connecting part and a transition part, wherein the bottom of the connecting part is fitted and connected to the microstrip line, and the top is connected to the transition part;

[0012] The microstrip line has a feed point in the middle to enable the antenna module to generate a first current mode at a first frequency; the two ends of the microstrip line are grounded to enable the antenna module to generate a second current mode at a second frequency.

[0013] In the above technical solution, the surface-mount ultra-wideband omnidirectional vertical antenna adopts a vertical antenna design. Compared with the PCB printed antenna design, it avoids the influence of the PCB board on the antenna in the XOY plane, allowing the antenna current to flow from bottom to top, achieving a vertically polarized horizontal omnidirectional coverage pattern, ensuring good radiation performance in the horizontal direction, and achieving uniform omnidirectional coverage. The microstrip line connected to the antenna module has a central feed point and grounding points at both ends, enabling the antenna module to generate a first current mode at a first frequency and a second current mode at a second frequency. Through dual-mode resonance, the antenna forms an impedance ultra-wideband effect over a wide frequency range, achieving wideband coverage and solving the problem of insufficient bandwidth in existing technologies. The exposed microstrip line on the top layer of the circuit board allows the antenna module to be directly mounted on the circuit board using a surface-mount process, while also achieving direct electrical connection with the microstrip line. Compared with manual soldering, this reduces labor costs and the defect rate during the production process.

[0014] As a preferred embodiment, the antenna module further includes a horizontal portion, the top of which is bent outward to form the horizontal portion, and the horizontal portion is arranged parallel to the circuit board.

[0015] In the above technical solution, on the one hand, bending the top of the transition section to both sides can effectively shorten the physical length of the antenna module in the vertical direction, allowing it to occupy less space without compromising the antenna's electrical performance. On the other hand, the design of the horizontal section can further meet the requirements of the surface mount technology (SMT) process. During automated SMT operations on the production line, structures such as suction nozzles are needed to pick up the antenna module and then place it onto the upper surface of the circuit board for mounting. The horizontal section of the antenna module provides a large and smooth contact surface, facilitating accurate material pickup and placement by the suction nozzle, improving the reliability and efficiency of SMT, and facilitating the large-scale automated production of surface mountable ultra-wideband omnidirectional vertical antennas.

[0016] As a preferred embodiment, the number of transition portions is at least two, and the tops of the transition portions are not connected, so that the connecting portion and the transition portions combine to form a U-shaped structure; or, the number of transition portions is at least two, and the tops of the transition portions are connected, so that the connecting portion and the transition portions combine to form a regular or irregular ring structure.

[0017] In the above technical solution, when current passes through the transition section, an electromagnetic field is generated in the surrounding space, thereby achieving vertically polarized electromagnetic wave radiation. The design of two transition sections reduces the antenna's inductance and increases its bandwidth; it also extends the antenna body onto the circuit board, improving its radiation efficiency. Simultaneously, the symmetry of the U-shaped structure helps optimize the antenna's radiation pattern, enabling more uniform omnidirectional radiation in the horizontal plane (XOY plane), thus improving the antenna's communication and positioning performance. Furthermore, the U-shaped structure design allows the antenna module to achieve a large radiation area within a limited space while maintaining the overall structural compactness; this design helps reduce the space occupied by the antenna module.

[0018] As a preferred embodiment, the circuit board is provided with a first via, and the feed point of the microstrip line is connected to the feed signal line through the first via.

[0019] In the above technical solution, the first via serves as a vertical connection channel penetrating the circuit board, used to achieve electrical connection between the top and bottom layers of the circuit board. Specifically, the first via connects the microstrip line feed point on the top layer of the circuit board to the feed signal line on the bottom layer of the circuit board, ensuring that the signal can be transmitted from the feed signal line on the bottom layer to the microstrip line on the top layer, and then transmitted to the antenna module through the microstrip line, thus achieving efficient signal transmission.

[0020] As a preferred embodiment, the bottom layer of the circuit board is a ground plane, and the circuit board is provided with a second via, through which the grounding point of the microstrip line is connected to the ground plane.

[0021] In the above technical solution, the second via, as a vertical connection channel penetrating the circuit board, is similar to the first via, but its main function is to achieve electrical connection between the microstrip line ground point and the underlying ground plane. Specifically, the second via provides a grounding path for the microstrip line, ensuring that the ground points at both ends of the microstrip line can achieve a good electrical connection with the underlying ground plane.

[0022] As a preferred embodiment, the top layer of the circuit board is provided with a fabric-free zone, and the connecting portion is correspondingly located within the fabric-free zone.

[0023] In the above technical solution, the "ghost area" refers to the area on the circuit board where other conductive metal structures, wiring, or other electronic components are prohibited from being placed. Its main function is to prevent other metals or conductive objects from interfering with the radiation and reception of the antenna module, while providing sufficient isolation space for the antenna module to ensure a relatively stable and controllable electromagnetic environment around the antenna. Therefore, in terms of structural design, the shape and position of the ghost area should match the design of the antenna module to ensure that the radiating part and the connection part of the antenna module are all within the ghost area.

[0024] As a preferred embodiment, the length and / or width of the restricted area is 0.5 to 3 mm larger than the connecting portion.

[0025] In the above technical solution, both the restricted area and the connecting part are set to a rectangular shape. The length and width of the restricted area are 0.5~3mm larger than the connecting part. This design provides the necessary isolation space for the antenna module to prevent other components on the circuit board from interfering with its electromagnetic wave radiation and reception.

[0026] As a preferred embodiment, the height of the antenna module is 4~8mm.

[0027] In the above technical solution, in order to correspond to the UWB frequency, the antenna module is designed with the corresponding size, that is, the antenna height is between 4 and 8 mm.

[0028] As a preferred embodiment, the transition portion has at least one perforated hole.

[0029] In the above technical solution, the purpose of the hollow hole design is to reduce the weight of the antenna by reducing the amount of material used in the antenna module without affecting the performance of the antenna module.

[0030] As a preferred embodiment, the antenna module is a UWB antenna, which can cover at least the ch5~ch9 frequency band.

[0031] In the above technical solution, the antenna module, as a UWB antenna, can support a variety of application requirements by covering the ch5~ch9 frequency band, providing high data transmission rate, accurate positioning capability and strong anti-interference performance, and is suitable for various complex usage environments.

[0032] In summary, the patchable ultra-wideband omnidirectional vertical antenna provided by this utility model has at least the following technical advantages compared with the prior art:

[0033] 1) Designing the antenna module in a vertical structure avoids the influence of the PCB board on the antenna in the XOY plane, allowing the antenna current to flow from bottom to top. This achieves a vertically polarized, horizontally omnidirectional coverage pattern, ensuring good radiation performance in the horizontal direction and achieving uniform omnidirectional coverage. This design helps improve the antenna's radiation efficiency, gain, and positioning accuracy. Compared to PCB-printed antenna solutions, this invention's antenna pattern has less non-circularity, and the signal radiation intensity difference in all directions is minimal. This effectively avoids problems such as short communication distance caused by gain dips, ensuring communication stability and reliability, and achieving relatively ideal communication effects in all directions.

[0034] 2) Through the microstrip line feed point and two ground points, the antenna module can generate a first current mode at a first frequency and a second current mode at a second frequency. Through dual-mode resonance, the antenna forms an impedance ultra-wideband effect in a wide frequency range, enabling the antenna module to have excellent frequency band coverage capability and achieve wide frequency band coverage (e.g., full coverage from ch5 to ch9). It can radiate omnidirectional pure linear polarized signals in the entire covered frequency band, solving the problem of insufficient bandwidth in existing technologies.

[0035] 2) By incorporating microstrip lines on the circuit board, electrical connections can be established with the antenna module's connection points, serving as an electrical connection channel between the antenna module and the circuitry. Simultaneously, the exposed copper on the upper surface of the microstrip lines allows the antenna module to be mounted directly above them using a surface mount process, thus achieving electrical connection between the antenna module and the microstrip lines. Therefore, this structural design meets the requirements of surface mount technology, enabling large-scale automated production, reducing labor costs and production defect rates, and improving the quality and performance stability of antenna products. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the first structure of the patchable ultrawideband omnidirectional vertical antenna of this utility model.

[0037] Figure 2 This is a schematic diagram of the second structure of the patchable ultrawideband omnidirectional vertical antenna of this utility model;

[0038] Figure 3 This is a partial cross-sectional schematic diagram of the patchable ultrawideband omnidirectional vertical antenna of this utility model.

[0039] The meanings of the reference numerals in the attached figures are as follows:

[0040] 1. Circuit board; 11. No-cover zone; 2. Antenna module; 21. Connector; 22. Transition section; 221. Hole; 23. Horizontal section; 3. Microstrip line; 4. First via; 5. First via. Detailed Implementation

[0041] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0042] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0044] See Figure 1 and Figure 2 As shown, the patchable ultrawideband omnidirectional vertical antenna provided by this utility model includes a circuit board 1, which includes a top layer and a bottom layer. The top layer is provided with a microstrip line 3. The top layer is the upper surface of the circuit board 1, which is the surface used to mount the antenna module 2; the bottom layer is the side opposite to the top layer, which is the lower surface of the circuit board 1.

[0045] The patchable ultrawideband omnidirectional vertical antenna also includes an antenna module 2, which includes a connecting part 21 and a transition part 22. The bottom of the connecting part 21 is attached to the microstrip line 3, and the top is connected to the transition part 22. The connecting part 21 serves as a structure for electrically connecting the antenna module 2 and the microstrip line 3, and also facilitates the patch manufacturing process.

[0046] The microstrip line 3 has a feed point in its middle, which is connected to the feed signal line, enabling the antenna module 2 to generate a first current mode at a first frequency. Both ends of the microstrip line 3 are grounded, enabling the antenna module 2 to generate a second current mode at a second frequency. The first and second frequencies are preferably different frequencies. Specifically, through the aforementioned dual-mode resonance, the antenna module 2 achieves an ultra-wideband impedance effect over a wide frequency range, giving it excellent frequency coverage capabilities. It can radiate omnidirectional linearly polarized signals across the entire covered frequency range, solving the problem of insufficient bandwidth in existing technologies.

[0047] For example, the first frequency of the first current mode generated by the antenna body is 6.5 GHz, and the second frequency of the second current mode is 11 GHz. The interaction of these two resonant modes at different frequencies ultimately enables antenna module 2 to achieve an impedance ultra-wideband effect in the 5.2 GHz to 10.2 GHz frequency band, which can fully cover the UWB ch5~ch9 frequency band, thereby solving the problem of insufficient bandwidth in existing technologies.

[0048] Furthermore, the antenna module 2 of this invention includes a connecting part 21 and a transition part 22. This vertical structure design avoids the influence of the circuit board 1 on the antenna module 2 in the XOY plane, allowing the antenna current to flow from bottom to top. This achieves a vertically polarized, horizontally omnidirectional coverage pattern, ensuring good radiation performance of the antenna in the horizontal direction and achieving uniform omnidirectional coverage. Compared to PCB-printed antenna solutions, the antenna pattern non-circularity of this invention is smaller, and the difference in signal radiation intensity in all directions is minimal. This effectively avoids problems such as short communication distance caused by gain dips, and achieves a more ideal communication effect in all directions.

[0049] Furthermore, the exposed microstrip line 3 on the top layer of circuit board 1 can be electrically connected to the connection part 21 of antenna module 2, serving as an electrical connection channel between antenna module 2 and the circuit. Specifically, the exposed copper on the upper surface of microstrip line 3 allows antenna module 2 to be mounted directly above microstrip line 3 using a surface mount process, thereby achieving an electrical connection between antenna module 2 and microstrip line 3. Thus, this structural design meets the requirements of surface mount technology, enabling large-scale automated production, reducing labor costs and defect rates during production, and improving the quality and performance stability of antenna products.

[0050] Example 1

[0051] In the first embodiment of this utility model, a specific structural design scheme for antenna module 2 is provided.

[0052] See Figure 1 and Figure 2As shown, in a preferred embodiment, the antenna module 2 further includes a horizontal portion 23. The top of the transition portion 22 is bent outward to form the horizontal portion 23, which is parallel to the circuit board 1. Structurally, bending the top of the transition portion 22 to form the horizontal portion 23 effectively shortens the physical length of the antenna module 2 in the vertical direction, allowing it to occupy less space without compromising its electrical performance, thus facilitating optimized structural design. From a surface mount technology (SMT) perspective, the design of the horizontal portion 23 further meets the requirements of the SMT process: during automated SMT operations on the production line, a suction nozzle or similar structure can be used to pick up the antenna module 2 and place it onto the upper surface of the circuit board 1 for SMT. Therefore, the horizontal portion 23 of the antenna module 2 provides a large and smooth contact surface, facilitating accurate suction and placement of materials by the suction nozzle, improving the reliability and efficiency of SMT, and contributing to the large-scale automated production of surface mountable ultra-wideband omnidirectional vertical antennas.

[0053] See Figure 1 and Figure 2 As shown, in another preferred embodiment, the number of transition portions 22 is at least two, and the tops of the transition portions 22 are not connected, so that the connecting portion 21 and the transition portions 22 combine to form a U-shaped structure. Specifically, the design of two transition portions 22 can increase the effective radiation area of ​​the antenna module 2, improve the gain and radiation efficiency of the antenna module 2, while maintaining the compactness of the overall structure. This design helps to reduce the space occupied by the antenna module 2. More specifically, the symmetry of the U-shaped structure helps to optimize the radiation pattern of the antenna, enabling it to achieve more uniform omnidirectional radiation on the horizontal plane (XOY plane) where the circuit board 1 is located, thereby improving the communication and positioning performance of the antenna.

[0054] Optionally, there are at least two transition portions 22, and the tops of the transition portions 22 are connected so that the connecting portion 21 and the transition portion 22 combine to form a regular or irregular ring structure. The cross-section of the transition portion 22 can be semi-circular, arc-shaped, or triangular, etc., and it combines with the connecting portion 21 at its bottom to form a regular or irregular ring structure.

[0055] In another preferred embodiment, to correspond to the UWB frequency, the antenna module 2 is designed with a corresponding size, that is, the height of the antenna module 2 is 4~8mm, to ensure that the antenna module 2 achieves good resonance and radiation efficiency in the UWB frequency band, while meeting the requirements of structural miniaturization.

[0056] See Figures 1-3As shown, in another preferred embodiment, the transition portion 22 is provided with at least one perforation 221. The purpose of the perforation 221 is to directly reduce the weight of the antenna by reducing the amount of material used in the antenna module 2 without affecting its performance, thus saving costs. Furthermore, since the connecting portion 21 and the horizontal portion 23 of the antenna module respectively perform mounting and adsorption functions in the patch process, it is inconvenient to provide perforations on either of them. Therefore, the perforation 221 is provided on the two transition portions 22 of the antenna module 2.

[0057] In another preferred embodiment, the antenna module 2 preferably adopts a UWB antenna, which can cover at least the ch5~ch9 frequency band, thereby supporting a variety of application requirements, providing high data transmission rate, accurate positioning capability and strong anti-interference performance, and is suitable for various complex usage environments.

[0058] Example 2

[0059] In the second embodiment of this utility model, a specific structural design scheme for circuit board 1 is provided.

[0060] See Figure 2 and Figure 3 As shown, in a preferred embodiment, the circuit board 1 is provided with a first via 4, and the feed point of the microstrip line 3 is connected to the feed signal line through the first via 4. Specifically, the first via 4 is a first vertical connection channel penetrating the circuit board 1, used to connect the feed point of the microstrip line 3 on the top layer of the circuit board 1 to the feed signal line on the bottom layer of the circuit board 1, ensuring that the signal can be transmitted from the feed signal line on the bottom layer to the microstrip line 3 on the top layer, and then transmitted to the antenna module 2 through the microstrip line 3, thereby achieving efficient signal transmission.

[0061] See Figure 2 and Figure 3 As shown, in another preferred embodiment, the bottom layer of the circuit board 1 is a ground plane, and the circuit board 1 is provided with a second via 5. The grounding point of the microstrip line 3 is connected to the ground plane through the second via 5. Specifically, the second via 5 is a second vertical connection channel penetrating the circuit board 1, and its main function is to realize the electrical connection between the grounding point of the microstrip line 3 and the bottom ground plane, providing a grounding path for the microstrip line 3.

[0062] It is worth mentioning that the microstrip line 3 has two grounding points, so the number of second vias 5 is also set to two accordingly.

[0063] See Figure 1As shown, in another preferred embodiment, the top layer of the circuit board 1 is provided with a containment area 11, and the connecting part 21 is correspondingly disposed within the containment area 11. The containment area 11 is the top layer area of ​​the circuit board 1 where other conductive metal structures, wiring, or other electronic components are prohibited. Specifically, the purpose of setting the containment area 11 is to prevent other metal or conductive objects from interfering with the radiation and reception of the antenna module 2, while providing sufficient isolation space for the antenna module 2 to ensure a relatively stable and controllable electromagnetic environment around the antenna. Therefore, in terms of structural design, the shape and position of the containment area 11 should match the design of the antenna module 2 to ensure that both the radiating part of the antenna module 2 and the connecting part 21 are within the containment area 11.

[0064] Furthermore, both the containment area 11 and the connection portion 21 of the antenna module 2 are rectangular in shape, and the length and / or width of the containment area 11 are 0.5~3mm larger than the connection portion 21. The above structural design provides the necessary isolation space for the antenna module 2, further preventing other components on the circuit board 1 from interfering with its electromagnetic wave radiation and reception.

[0065] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A patchable ultrawideband omnidirectional vertical antenna, characterized in that, include: A circuit board, comprising a top layer and a bottom layer, wherein the top layer is provided with microstrip lines; The antenna module includes a connecting part and a transition part, wherein the bottom of the connecting part is fitted and connected to the microstrip line, and the top is connected to the transition part; The microstrip line has a feed point in the middle to enable the antenna module to generate a first current mode at a first frequency; the two ends of the microstrip line are grounded to enable the antenna module to generate a second current mode at a second frequency.

2. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The antenna module also includes a horizontal section, the top of which is bent outward to form the horizontal section, and the horizontal section is arranged parallel to the circuit board.

3. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The number of transition portions is at least two, and the tops of the transition portions are not connected, so that the connecting portion and the transition portions combine to form a U-shaped structure; or, the number of transition portions is at least two, and the tops of the transition portions are connected, so that the connecting portion and the transition portions combine to form a regular or irregular ring structure.

4. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The circuit board has a first via hole, and the feed point of the microstrip line is connected to the feed signal line through the first via hole.

5. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The bottom layer of the circuit board is a ground plane, and a second via is provided through the circuit board. The grounding point of the microstrip line is connected to the ground plane through the second via.

6. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The top layer of the circuit board has a fabric-free zone, and the connecting part is correspondingly located within the fabric-free zone.

7. The patchable ultra-wideband omnidirectional vertical antenna according to claim 6, characterized in that, The length and / or width of the restricted area are 0.5 to 3 mm larger than the connecting portion.

8. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The height of the antenna module is 4~8mm.

9. The patchable ultra-wideband omnidirectional vertical antenna according to claim 1, characterized in that, The transition section has at least one perforated hole.

10. The patchable ultra-wideband omnidirectional vertical antenna according to any one of claims 1-9, characterized in that, The antenna module is a UWB antenna, which can cover at least the ch5~ch9 frequency band.

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