Circularly polarized magnetic dipole yagi antenna array module

Abstract

This invention discloses a circularly polarized magnetic dipole Yagi antenna array module, including a SIW power divider and four antenna elements mounted on the SIW power divider. The four antenna elements are arranged in a cross shape. Each antenna element includes a dielectric substrate, a first metal plate, a second metal plate, and SIW pillars. The dielectric substrate is generally convex in shape and includes a connected lower dielectric part and an upper dielectric part. The width of the lower dielectric part is greater than the width of the upper dielectric part. The first metal plate is located on the front of the lower dielectric part, and the second metal plate is located on the back of the lower dielectric part. The SIW pillars are located inside the lower dielectric part and connect the first metal plate and the second metal plate. Multiple SIW pillars are provided on both sides and the top of the lower dielectric part. No SIW pillars are provided at the connection between the lower and upper dielectric parts to form a feed port. Multiple rows of air isolation pillars are provided on the upper dielectric part to divide the upper dielectric part into multiple functional areas. This circularly polarized magnetic dipole Yagi antenna array module has a novel structure, small size, and high gain.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a circularly polarized magnetic dipole Yagi antenna array module. Background Technology

[0002] Chinese utility model patent application number 202022517211.6 discloses a circularly polarized Yagi antenna array, which has the drawbacks of being too large and having high requirements for the installation environment.

[0003] Therefore, it is necessary to develop a small-volume circularly polarized Yagi antenna array module to cope with application environments with large installation space constraints. Summary of the Invention

[0004] The main objective of this invention is to propose a novel circularly polarized magnetic dipole Yagi antenna array module, aiming to solve the problem of the excessively large size of existing circularly polarized Yagi antenna arrays.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a circularly polarized magnetic dipole Yagi antenna array module, including a SIW power divider and four antenna elements disposed on the SIW power divider. The four antenna elements are arranged in a cross shape. Each antenna element includes a dielectric substrate, a first metal plate, a second metal plate, and a SIW pillar. The dielectric substrate is generally convex in shape and includes a connected lower dielectric portion and an upper dielectric portion. The width of the lower dielectric portion is greater than the width of the upper dielectric portion. The first metal plate is disposed on the front side of the lower dielectric portion, and the second metal plate is disposed on the front side of the upper dielectric portion. On the back side of the lower part of the medium, the SIW pillar is disposed inside the lower part of the medium and connects the first metal plate and the second metal plate. Multiple SIW pillars are provided on both sides and the top of the lower part of the medium. No SIW pillar is provided at the connection between the lower part of the medium and the upper part of the medium to form a power supply port. Multiple rows of air isolation pillars are provided on the upper part of the medium to divide the upper part of the medium into multiple functional areas. The functional area adjacent to the lower part of the medium is a driver, and the remaining functional areas are directors. The SIW pillar located at the top of the lower part of the medium constitutes a reflector.

[0006] The beneficial effects of this invention are as follows:

[0007] This circularly polarized magnetic dipole Yagi antenna array module has a novel and compact structure, small size, and occupies little space, making it particularly suitable for applications with limited installation space.

[0008] This circularly polarized magnetic dipole Yagi antenna array module has a wide frequency coverage and high gain, and is a typical high-gain circularly polarized array. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of the structure of the circularly polarized magnetic dipole Yagi antenna array module according to Embodiment 1 of the present invention;

[0011] Figure 2 This is a perspective view of the SIW power divider in the circularly polarized magnetic dipole Yagi antenna array module according to Embodiment 1 of the present invention;

[0012] Figure 3 This is a perspective view of an antenna element in a circularly polarized magnetic dipole Yagi antenna array module according to Embodiment 1 of the present invention.

[0013] Figure 4 This is the S11 curve diagram of the circularly polarized magnetic dipole Yagi antenna array module according to Embodiment 1 of the present invention;

[0014] Figure 5 This is an axial ratio curve of the circularly polarized magnetic dipole Yagi antenna array module according to Embodiment 1 of the present invention;

[0015] Figure 6 This is a gain curve diagram of the circularly polarized magnetic dipole Yagi antenna array module according to Embodiment 1 of the present invention.

[0016] Explanation of icon numbers:

[0017] 1. SIW power divider; 11. Substrate; 12. Upper ground plane; 121. Feed gap; 13. Lower ground plane; 14. Shorting post; 15. Feed connector;

[0018] 2. Antenna element; 21. Dielectric substrate; 211. Lower dielectric layer; 212. Upper dielectric layer; 22. First metal plate; 23. Second metal plate; 24. SIW post; 25. Feed port; 26. Driver; 27. Director; 28. Reflector; 29. ​​Through-hole;

[0019] 3. Pressure plate;

[0020] 4. Fastening components. Detailed Implementation

[0021] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0025] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Example 1

[0028] Please refer to Figures 1 to 6 Embodiment 1 of the present invention is as follows: Figures 1 to 3As shown, the circularly polarized magnetic dipole Yagi antenna array module includes a SIW power divider 1 and four antenna elements 2 disposed on the SIW power divider 1. The four antenna elements 2 are arranged in a cross shape, and any two antenna elements 2 do not contact each other. Each antenna element 2 includes a dielectric substrate 21, a first metal plate 22, a second metal plate 23, and SIW pillars 24. The dielectric substrate 21 is generally convex in shape and includes a connected lower dielectric portion 211 and an upper dielectric portion 212. The width of the lower dielectric portion 211 is greater than the width of the upper dielectric portion 212. The first metal plate 22 is disposed on the front side of the lower dielectric portion 211, and the second metal plate 23 is disposed on the front side of the lower dielectric portion 211. On the back side, the SIW pillar 24 is disposed within the lower dielectric portion 211 and connects the first metal plate 22 and the second metal plate 23. Multiple SIW pillars 24 are provided on both sides and the top of the lower dielectric portion 211. No SIW pillars 24 are provided at the connection between the lower dielectric portion 211 and the upper dielectric portion 212, thus forming a power supply port 25. Multiple rows of air isolation pillars are provided on the upper dielectric portion 212 to divide it into multiple functional areas. The functional area adjacent to the lower dielectric portion 211 is the driver 26, and the remaining functional areas are directors 27. The SIW pillars 24 located at the top of the lower dielectric portion 211 constitute a reflector 28. The air isolation pillars are the through holes 29 provided on the upper dielectric portion 212.

[0029] The dielectric substrate 21 is a PCB substrate 11 or a ceramic plate, and the dielectric constant of the dielectric substrate 21 is greater than or equal to 10.

[0030] To facilitate the fixing and subsequent maintenance of the antenna element 2, the circularly polarized magnetic dipole Yagi antenna array module also includes a pressure plate 3 and a fastening assembly 4. The pressure plate 3 is located above the SIW power divider 1 and is connected and fixed to the SIW power divider 1 through the fastening assembly 4. The pressure plate 3 has a through-hole for the upper part 212 of the dielectric to pass through, and the pressure plate 3 presses against the top surface of the lower part 211 of the dielectric. In some embodiments, the antenna element 2 can also be fixed to the SIW power divider 1 by welding or other connection methods.

[0031] Preferably, the pressure plate 3 is made of metal. The metal pressure plate 3 has high structural strength and can better install and fix the antenna unit 2. More preferably, the first metal plate 22 and / or the second metal plate 23 are in contact with the pressure plate 3, which can improve the reflection effect of the reflector 28 to a certain extent, thereby improving the antenna performance of the circularly polarized magnetic dipole Yagi antenna array module.

[0032] In this embodiment, the fastening component 4 is a bolt assembly. Using a bolt assembly as the fastening component 4 makes later maintenance of the circularly polarized magnetic dipole Yagi antenna array module more convenient. The SIW power divider 1 is rectangular. To ensure more stable installation of the antenna unit 2, optionally, the four corners of the SIW power divider 1 are provided with the bolt assembly. In other embodiments, the fastening component 4 can also be a snap-fit ​​structure, etc.

[0033] This circularly polarized magnetic dipole Yagi antenna array module achieves circular polarization through SIW power divider 1. Specifically, the SIW power divider 1 includes a substrate 11, with an upper ground layer 12 on the top surface and a lower ground layer 13 on the bottom surface. The substrate 11 contains multiple shorting posts 14 that connect the upper ground layer 12 and the lower ground layer 13. These shorting posts 14 form a hollow cross structure. The upper ground layer 12 has four power supply gaps 121 located within the hollow cross structure, at the four ends of the hollow cross structure. The bottom surface of the dielectric lower part 211 contacts the upper ground layer 12 and covers the power supply gaps 121. A power supply connector 15 is located at the bottom of the SIW power divider 1, corresponding to the center point of the hollow cross structure. The core of the power supply connector 15 is connected to the upper ground layer 12, and the outer conductor of the power supply connector 15 is connected to the lower ground layer 13.

[0034] Preferably, the upper layer 12 is in contact with and connected to the first metal plate 22 and / or the second metal plate 23.

[0035] Figure 4 The S11 curve of the circularly polarized magnetic dipole Yagi antenna array module of this embodiment is shown.

[0036] Figure 5 The axial ratio curve of the circularly polarized magnetic dipole Yagi antenna array module of this embodiment is shown.

[0037] Figure 6 The gain curve of the circularly polarized magnetic dipole Yagi antenna array module of this embodiment is shown.

[0038] Depend on Figures 4 to 6 As can be seen, the circularly polarized magnetic dipole Yagi antenna array module of this embodiment can effectively cover the 26.5-31.5GHz frequency band, with an axial ratio of 27.4-28.4GHz. Its gain in the 26-29GHz frequency band is as high as 12dB or more, and can reach a maximum of 14dB. It is a typical high-gain circularly polarized array.

[0039] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A circularly polarized magnetic dipole Yagi antenna array module, characterized in that: The device includes a SIW power divider and four antenna elements mounted on the SIW power divider. The four antenna elements are arranged in a cross shape. Each antenna element includes a dielectric substrate, a first metal plate, a second metal plate, and SIW pillars. The dielectric substrate is generally convex in shape and includes a connected lower dielectric part and an upper dielectric part. The width of the lower dielectric part is greater than the width of the upper dielectric part. The first metal plate is located on the front of the lower dielectric part, and the second metal plate is located on the back of the lower dielectric part. The SIW pillars are located inside the lower dielectric part and connect the first metal plate and the second metal plate. Multiple SIW pillars are provided on both sides and the top of the lower dielectric part. No SIW pillars are provided at the connection between the lower and upper dielectric parts to form a feed port. Multiple rows of air isolation pillars are provided on the upper dielectric part to divide the upper dielectric part into multiple functional areas. The functional areas adjacent to the lower dielectric part are drivers, and the remaining functional areas are directors. The SIW pillars located at the top of the lower dielectric part constitute a reflector.

2. The circularly polarized magnetic dipole Yagi antenna array module according to claim 1, characterized in that: The dielectric substrate is a PCB substrate or a ceramic plate.

3. The circularly polarized magnetic dipole Yagi antenna array module according to claim 1, characterized in that: The dielectric constant of the dielectric substrate is greater than or equal to 10.

4. The circularly polarized magnetic dipole Yagi antenna array module according to claim 1, characterized in that: It also includes a pressure plate and a fastening assembly. The pressure plate is located above the SIW power divider. The pressure plate is connected and fixed to the SIW power divider through the fastening assembly. The pressure plate has a through-hole for the upper part of the medium to pass through. The pressure plate presses against the top surface of the lower part of the medium.

5. The circularly polarized magnetic dipole Yagi antenna array module according to claim 4, characterized in that: The pressure plate is made of metal.

6. The circularly polarized magnetic dipole Yagi antenna array module according to claim 5, characterized in that: The first metal plate and / or the second metal plate are in contact with the pressure plate.

7. The circularly polarized magnetic dipole Yagi antenna array module according to claim 4, characterized in that: The fastening assembly is a bolt assembly.

8. The circularly polarized magnetic dipole Yagi antenna array module according to claim 7, characterized in that: The SIW power divider is rectangular, and the bolt assembly is provided at each of the four corners of the SIW power divider.

9. The circularly polarized magnetic dipole Yagi antenna array module according to claim 1, characterized in that: Any two of the antenna elements shall not be in contact with each other.

10. The circularly polarized magnetic dipole Yagi antenna array module according to claim 1, characterized in that: The SIW power divider includes a substrate, with an upper ground layer on the top surface and a lower ground layer on the bottom surface. Multiple shorting posts connecting the upper and lower ground layers are located within the substrate, forming a hollow cross structure. Four power supply slots are located on the upper ground layer within the hollow cross structure, at the four ends of the structure. The bottom surface of the dielectric layer contacts the upper ground layer and covers the power supply slots. A power supply connector is located at the bottom of the SIW power divider corresponding to the center point of the hollow cross structure.

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