A high gain omnidirectional antenna

Abstract

The utility model discloses a kind of high-gain omnidirectional antennas, including hollow cylindrical tube, half steel coaxial radio frequency wire, multiple metal reflector plates, multiple antenna plates, the side wall of hollow cylindrical tube is equipped with multiple notches extending along vertical direction, multiple notches are evenly distributed along the circumference of hollow cylindrical tube;Metal reflector plate, the side of antenna plate is equipped with the convex edge of insertion in notch, metal reflector plate and antenna plate are respectively equipped on each notch, metal reflector plate and antenna plate are adjacent at notch;The lower end of hollow cylindrical tube is connected with half steel coaxial radio frequency wire, half steel coaxial radio frequency wire is connected with the antenna feeder of antenna plate, the lower end of half steel coaxial radio frequency wire is connected with N female head connector.This scheme forms multiple oscillator radiations by dipole array of multiple antenna plates, uses the focusing principle of metal reflector plate, through uniform reflection space design, achieves high efficiency of directional antenna, also has radiating omnidirection, simultaneously also realizes the purpose of miniaturization.

Description

Technical Field

[0001] This disclosure relates to the field of antenna technology, and more particularly to a high-gain omnidirectional antenna. Background Technology

[0002] Antennas, as key components for signal transmission in communication equipment, are classified into directional antennas and omnidirectional antennas based on their radiation directionality. Directional antennas concentrate electromagnetic wave energy in a specific direction, offering limited coverage but concentrated signal strength, making them suitable for long-distance transmission or coverage of specific areas. Because directional antennas can radiate all energy in a specific orientation, they are characterized by high gain. Omnidirectional antennas achieve 360° uniform electromagnetic wave radiation in the horizontal direction, but still suffer from directional compression in the vertical direction. This structure limits energy concentration, resulting in lower gain compared to directional antennas. To address this, patent publication number CN105742827B discloses a broadband high-gain omnidirectional antenna based on corner reflectors. This antenna utilizes corner reflectors formed by four corner reflection spaces divided by two orthogonal metal plates. A dipole array is placed on the angle bisector of each corner reflection space and uniformly arranged in the horizontal plane, achieving uniform energy distribution in the horizontal plane and obtaining high-gain omnidirectional radiation characteristics. The aforementioned disclosed technical solution designs a corner reflector composed of two orthogonal metal plates. This corner reflector is formed by casting metal using a mold, resulting in high production costs. Furthermore, the dimensions of the formed metal plates are predetermined, making it inflexible for different metal plate dimensions or PCBA antenna boards of varying sizes. Therefore, this technical solution aims to optimize and improve the aforementioned omnidirectional antenna structure. Utility Model Content

[0003] In view of this, this disclosure proposes a high-gain omnidirectional antenna that realizes a corner reflector structure composed of a hollow cylindrical tube and a metal reflector. The structural components have low processing costs and are simple to assemble. It can flexibly adapt to different antennas by adjusting the size of the metal reflector and the size of the antenna plate.

[0004] According to one aspect of this disclosure, a high-gain omnidirectional antenna is provided, comprising a hollow cylindrical tube, a semi-steel coaxial radio frequency line, multiple metal reflectors, and multiple antenna plates. The sidewall of the hollow cylindrical tube is provided with multiple slots extending vertically, and the multiple slots are evenly distributed along the circumference of the hollow cylindrical tube. One side of each metal reflector and antenna plate is provided with a protruding edge that inserts into the slot. Each slot is provided with a metal reflector and an antenna plate, and the metal reflector and antenna plate are arranged adjacent to each other at the slot. The lower end of the hollow cylindrical tube is connected to a semi-steel coaxial radio frequency line, which is connected to the antenna feed line of the antenna plate. The lower end of the semi-steel coaxial radio frequency line is connected to an N-type female connector.

[0005] As one of the preferred embodiments, the hollow cylindrical tube has eight slots on its sidewall, four metal reflectors are arranged at a 90° angle to each other on the hollow cylindrical tube, and four antenna plates are arranged at a 45° angle to each other on the hollow cylindrical tube.

[0006] Furthermore, the antenna plate includes a dielectric plate and antenna elements disposed on the front and back surfaces of the dielectric plate. Among the four antenna plates, the antenna elements on two antenna plates that are at a 180° angle to each other on the hollow cylindrical tube are connected in pairs by antenna feed lines. The lower end of the antenna feed lines is connected to a semi-steel coaxial radio frequency line.

[0007] Furthermore, the hollow cylindrical tube has an upward-sloping through hole on its side wall near its lower end. The upper end of the semi-steel coaxial radio frequency cable is inserted into the lower end of the hollow cylindrical tube and passes through the through hole. The outer wall of the semi-steel coaxial radio frequency cable is welded to the hollow cylindrical tube at the through hole.

[0008] Furthermore, the lower inner side of the protruding edge of the metal reflector and the antenna plate is provided with a slot. After the protruding edge of the metal reflector and the antenna plate is inserted into the slot of the hollow cylindrical tube, it moves downward. The slot at the lower end of the protruding edge of the metal reflector and the antenna plate is engaged with the side wall of the hollow cylindrical tube corresponding to the lower end of the slot of the hollow cylindrical tube.

[0009] To further ensure the stability of the installation and fixation of the metal reflector and antenna plate in the slot on the side wall of the hollow cylindrical tube, a plastic limiting column is inserted into the upper end of the hollow cylindrical tube. The outer wall of the plastic limiting column is provided with a limiting groove for inserting the protruding edge of the metal reflector and antenna plate.

[0010] Furthermore, a base is provided at the lower end of the semi-steel coaxial radio frequency cable. The center of the base is provided with a through hole for the semi-steel coaxial radio frequency cable to pass through. The base is provided with an outer shell that covers the hollow cylindrical tube, metal reflector, and antenna plate. The outer shell is a hollow shell with an opening at the lower end. The outer edge of the base is provided with external threads, and the lower opening edge of the outer shell is provided with internal threads. The outer shell and the base are connected by internal and external threads.

[0011] Furthermore, a hollow insertion post is provided at the center of the inner top of the outer shell, and the upper end of the hollow cylindrical tube is inserted into the hollow insertion post.

[0012] The beneficial effects of this utility model are as follows: This technical solution designs a hollow cylindrical tube with slots on its sidewalls for mounting metal reflectors and antenna plates. For metal reflectors and antenna plates of different sizes, hollow cylindrical tubes of varying lengths can be selected, corresponding to the slot lengths for mounting the metal reflectors and antenna plates. Compared to molded corner reflectors, the structural components of this solution are simpler to manufacture and have lower costs. Furthermore, traditional multi-element antennas require a significant increase in the number of elements to improve gain, often resulting in a larger size with higher gain. This solution, however, uses a dipole array composed of multiple antenna plates to form multi-element radiation. Utilizing the focusing principle of the metal reflector and a uniform reflection space design, it achieves both the high efficiency of a directional antenna and omnidirectional radiation, while also miniaturizing the device. Attached Figure Description

[0013] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this disclosure together with the specification and serve to explain the principles of this disclosure.

[0014] Figure 1 This is a schematic diagram of the overall antenna structure provided in an embodiment of the present invention.

[0015] Figure 2 An exploded view of the metal reflector, antenna plate, and hollow cylindrical tube provided in the embodiments of this utility model.

[0016] Figure 3 This is a schematic diagram of the metal reflector structure provided in an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of the antenna board structure provided for an embodiment of the present utility model.

[0018] Figure 5 A schematic diagram of the plastic limiting column structure provided in the embodiment of this utility model.

[0019] Figure 6 A schematic diagram of the high-gain omnidirectional antenna with a base and outer shell provided in this embodiment of the utility model.

[0020] Figure 7 for Figure 6 An axial cross-sectional view of the overall assembly structure.

[0021] Figure 8 for Figure 6 A radial section view of the overall assembly structure.

[0022] The following are explanations of the reference numerals in the attached figures: 1. Hollow cylindrical tube body; 101. Groove; 2. Semi-steel coaxial RF cable; 3. Metal reflector; 4. Antenna plate; 34. Raised edge; 341. Slot; 5. N-type female connector; 6. Plastic limiting post; 601. Limiting groove; 7. Base; 8. Outer shell; 801. Hollow plug-in post. Detailed Implementation

[0023] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this disclosure.

[0024] Please refer to Figures 1 to 5 This is a specific embodiment of a high-gain omnidirectional antenna provided by this solution. In this embodiment, it includes a hollow cylindrical tube 1, a semi-steel coaxial RF cable 2, four metal reflectors 3, and four antenna plates 4. The side wall of the hollow cylindrical tube 1 is provided with eight slots 101 extending vertically, and the eight slots 101 are evenly distributed around the circumference of the hollow cylindrical tube 1. One side of each of the metal reflectors 3 and antenna plates 4 is provided with a protruding edge 34 that is inserted into the slot 101. Each slot 101 is provided with a metal reflector 3 and an antenna plate 4, and the metal reflector 3 and the antenna plate 4 are arranged adjacent to each other at the slot 101. The lower end of the hollow cylindrical tube 1 is connected to the semi-steel coaxial RF cable 2, which is connected to the antenna feed line of the antenna plate 4. The lower end of the semi-steel coaxial RF cable 2 is connected to an N-type female connector 5. In the specific assembly of the metal reflector 3, antenna plate 4, and hollow cylindrical tube 1, adjacent metal reflectors 3 are positioned at a 90° angle to the hollow cylindrical tube 1, and each antenna plate 4 is positioned at a 45° angle to the adjacent metal reflector 3, forming 360-degree omnidirectional radiation. Through this structural arrangement, adjacent metal reflectors 3 of each antenna plate 4 form mutually beneficial back-to-back radiation. The feed signal current is transmitted through the feed lines at the bottom to the antenna elements on the antenna plates 4. Utilizing the focusing principle, the electromagnetically induced magnetic field signal is concentrated and emitted after focused reflection by the metal reflectors 3, resulting in a higher antenna gain than the original element.

[0025] In this embodiment, the antenna plate 4 includes a dielectric plate and antenna elements disposed on the front and back surfaces of the dielectric plate. Among the four antenna plates 4, the antenna elements on the two antenna plates 4 that are at a 180° angle to each other on the hollow cylindrical tube 1 are connected in pairs by antenna feed lines. The lower end of the antenna feed lines is connected to the semi-steel coaxial radio frequency line 2.

[0026] In this embodiment, the hollow cylindrical tube 1 has an upward-sloping through hole on its side wall near its lower end. The upper end of the semi-steel coaxial radio frequency cable 2 is inserted into the lower end of the hollow cylindrical tube 1 and passes through the through hole. The outer wall of the semi-steel coaxial radio frequency cable 2 is welded to the hollow cylindrical tube 1 at the through hole, thereby forming a supporting strength for the hollow cylindrical tube 1.

[0027] Please refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 Preferably, the lower inner side of the protrusion 34 of the metal reflector 3 and the antenna plate 4 is provided with a slot 341. After the protrusion 34 of the metal reflector 3 and the antenna plate 4 are inserted into the slot 101 of the hollow cylindrical tube 1, they move downwards and the slot 341 at the lower end of the protrusion 34 of the metal reflector 3 and the antenna plate 4 is engaged with the side wall of the hollow cylindrical tube 1 corresponding to the lower end of the slot 101 of the hollow cylindrical tube 1.

[0028] Please refer to Figures 5 to 8 To further ensure the stability of the installation and fixation of the metal reflector plate 3 and antenna plate 4 on the side wall of the hollow cylindrical tube 1, a plastic limiting column 6 is inserted into the upper end of the hollow cylindrical tube 1. The outer wall of the plastic limiting column 6 is provided with a limiting groove 601 for inserting the protrusion 34 of the metal reflector plate 3 and antenna plate 4. The metal reflector plate 3 and the antenna plate 4 are installed one by one into the slot 101 of the hollow cylindrical tube 1. Then, the plastic limiting column 6 is inserted from the upper end of the hollow cylindrical tube 1. The limiting groove 601 on the plastic limiting column 6 is inserted into the protruding edge 34 of the slot 101 of the metal reflector plate 3 and the antenna plate 4 one by one. The upper end of the limiting groove 601 presses the upper end of the protruding edge 34 of the slot 101 of the metal reflector plate 3 and the antenna plate, and the locking groove 101 at the lower end of the protruding edge 34 of the slot 101 of the metal reflector plate 3 and the antenna plate, respectively, engages with the side wall of the hollow cylindrical tube 1 corresponding to the lower end of the slot 101 of the slot 101 of the hollow cylindrical tube 1, thereby making it difficult for the metal reflector plate 3 and the antenna plate 4 to detach from the slot 101 of the hollow cylindrical tube 1.

[0029] Preferably, a base 7 is provided at the lower end of the semi-steel coaxial RF cable 2. The center of the base 7 has a through hole for the semi-steel coaxial RF cable 2 to pass through. The base 7 is provided with an outer shell 8 that covers the hollow cylindrical tube 1, the metal reflector plate 3, and the antenna plate 4. The outer shell 8 is a hollow shell with an open lower end. The outer edge of the base 7 has external threads, and the lower opening edge of the outer shell 8 has internal threads. The outer shell 8 and the base 7 are connected by the internal and external threads. By setting the outer shell 8 and the base 7, the metal reflector plate 4, the hollow cylindrical tube 1, and the semi-steel coaxial RF cable 2 that make up the antenna are provided with external protection.

[0030] Preferably, a hollow insertion post 801 is provided at the center of the inner top of the outer shell 8. The upper end of the hollow cylindrical tube 1 is inserted into the hollow insertion post 801. The upper end of the hollow cylindrical tube 1 is fixed by the inner top of the outer shell 8, and the lower end is fixed by the connected semi-steel coaxial radio frequency cable 2, thereby making the hollow cylindrical tube 1 fixed and not easy to loosen.

[0031] The design of this scheme involves a hollow cylindrical tube 1 with slots 101 on its side wall for mounting metal reflectors 3 and antenna plates 4. For metal reflectors 3 and antenna plates 4 of different sizes, hollow cylindrical tubes 1 of different lengths can be selected, with corresponding slots 101 of appropriate length for mounting the metal reflectors 3 and antenna plates 4. Compared to corner reflectors formed by molds, the processing of the structural components in this scheme is simpler and the cost is lower. In this scheme, hollow copper tubes are preferred for the hollow cylindrical tube 1.

[0032] The parts not described in detail in this technical solution specification are obvious to those skilled in the art and can be supplemented and improved based on existing technical knowledge. At the same time, those skilled in the art should understand that the above embodiments are merely preferred embodiments of this utility model. For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A high-gain omnidirectional antenna, characterized in that, The device includes a hollow cylindrical tube, a semi-steel coaxial radio frequency cable, multiple metal reflectors, and multiple antenna plates. The sidewall of the hollow cylindrical tube has multiple slots extending vertically, which are evenly distributed around the circumference of the hollow cylindrical tube. Each metal reflector and antenna plate has a protruding edge that inserts into the slot. Each slot has a metal reflector and an antenna plate respectively, and the metal reflector and antenna plate are arranged adjacent to each other at the slot. The lower end of the hollow cylindrical tube is connected to the semi-steel coaxial radio frequency cable, which is connected to the antenna feed line of the antenna plate. The lower end of the semi-steel coaxial radio frequency cable is connected to an N-type female connector.

2. The high-gain omnidirectional antenna according to claim 1, characterized in that, The hollow cylindrical tube has eight slots on its sidewall, and four metal reflectors are arranged at a 90° angle to each other on the hollow cylindrical tube. The antenna plate has four pieces, and each antenna plate is arranged at a 45° angle to the adjacent metal reflector on the hollow cylindrical tube.

3. The high-gain omnidirectional antenna according to claim 2, characterized in that, The antenna plate includes a dielectric plate and antenna elements disposed on the front and back surfaces of the dielectric plate. Among the four antenna plates, the antenna elements on two antenna plates that are at a 180° angle to each other on the hollow cylindrical tube are connected in pairs by antenna feed lines. The lower end of the antenna feed lines is connected to a semi-steel coaxial radio frequency line.

4. The high-gain omnidirectional antenna according to claim 3, characterized in that, The hollow cylindrical tube has an upward-sloping through hole on its side wall near its lower end. The upper end of the semi-steel coaxial radio frequency cable is inserted into the lower end of the hollow cylindrical tube and passes through the through hole. The outer wall of the semi-steel coaxial radio frequency cable is welded to the hollow cylindrical tube at the through hole.

5. The high-gain omnidirectional antenna according to claim 1, characterized in that, The lower inner side of the protruding edge of the metal reflector and the antenna plate is provided with a slot. After the protruding edge of the metal reflector and the antenna plate is inserted into the slot of the hollow cylindrical tube, it moves downward. The slot at the lower end of the protruding edge of the metal reflector and the antenna plate is engaged with the side wall of the hollow cylindrical tube corresponding to the lower end of the slot of the hollow cylindrical tube.

6. The high-gain omnidirectional antenna according to claim 1, characterized in that, A plastic limiting column is inserted into the upper end of a hollow cylindrical tube. The outer wall of the plastic limiting column is provided with a limiting groove for inserting a protruding edge of a metal reflector plate and an antenna plate.

7. The high-gain omnidirectional antenna according to claim 1, characterized in that, The lower end of the semi-steel coaxial radio frequency cable is provided with a base. The center of the base is provided with a through hole for the semi-steel coaxial radio frequency cable to pass through. The base is provided with an outer shell that covers the hollow cylindrical tube, metal reflector, and antenna plate. The outer shell is a hollow shell with an opening at the lower end. The outer edge of the base is provided with an external thread, and the lower opening edge of the outer shell is provided with an internal thread. The outer shell and the base are connected by the internal thread and the external thread.

8. The high-gain omnidirectional antenna according to claim 7, characterized in that, A hollow insertion post is provided at the center of the inner top of the outer shell, and the upper end of the hollow cylindrical tube is inserted into the hollow insertion post.

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