Dual-frequency directional log-periodic antenna and unmanned aerial vehicle reconnaissance equipment

Abstract

The utility model provides a double-frequency directional log-periodic antenna and unmanned aerial vehicle reconnaissance equipment. The provided dual-frequency directional log-periodic antenna comprises a coaxial line, one end of the coaxial line is provided with a connector, and the other end of the coaxial line is provided with a feed part; the oscillator unit comprises a first main beam and a second main beam which extend along the length direction of the coaxial line; the first main beam is located between the coaxial line and the second main beam, and the first main beam and the second main beam are respectively connected with the feed part; the first main beam is connected with a plurality of first antenna oscillators, and the second main beam is connected with a plurality of second antenna oscillators; the plurality of first antenna oscillators are arranged at intervals along the length direction of the coaxial line; the first antenna oscillator and the second antenna oscillator are symmetrically arranged about the coaxial line. The working frequency of the dual-frequency directional log-periodic antenna provided by the utility model is 1160MHz-1300MHz and 1559MHz-1610MHz, and the dual-frequency directional log-periodic antenna is installed on unmanned aerial vehicle reconnaissance equipment and can ensure that the unmanned aerial vehicle reconnaissance equipment accurately and timely discovers unmanned aerial vehicle signals.

Description

Technical Field

[0001] The utility model belongs to the field of communication technology, and particularly relates to a dual-frequency directional log-periodic antenna and a drone reconnaissance device. Background Art

[0002] The unmanned aerial vehicle, abbreviated as "drone", is an unpiloted aircraft controlled by a radio remote control device and a self-contained program control device. There is no cockpit on the aircraft, but devices such as an autopilot and a program control device are installed. The remote control personnel can directly perform operations such as tracking, positioning, remote control, remote measurement, and digital transmission on the ground through devices such as radar, so as to perform high-altitude reconnaissance, photographing and other operations. However, drones need to fly within the scope permitted by laws. For example, it is prohibited to take off and land drones within 500 meters along railway lines. Drone no-fly zones with heights of 30 meters, 60 meters, and 120 meters are generally set at various airports. In order to prevent drones from flying into no-fly zones and causing serious impacts on railway and aviation safety, drone reconnaissance devices are generally set up to be able to detect drone signals in a timely manner, so as to drive them away or shoot them down in a timely manner. Therefore, how to enable the drone reconnaissance device to accurately and timely detect drone signals is a problem worthy of exploration. Content of the Utility Model

[0003] In view of the problems existing in the above-mentioned prior art, the main purpose of the utility model is to provide a dual-frequency directional log-periodic antenna and a drone reconnaissance device. The working frequencies of the provided dual-frequency directional log-periodic antenna are 1160 MHz to 1300 MHz and 1559 MHz to 1610 MHz. It is installed on the drone reconnaissance device and can ensure that the drone reconnaissance device accurately and timely detects drone signals.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] The utility model provides a dual-frequency directional log-periodic antenna, which includes:

[0006] A coaxial cable, one end of the coaxial cable is provided with a connector, and the other end of the coaxial cable is provided with a feeding part;

[0007] An oscillator unit, the first main beam and the second main beam included in the oscillator unit both extend along the length direction of the coaxial cable; the first main beam is located between the coaxial cable and the second main beam, and the first main beam and the second main beam are respectively connected to the feeding part;

[0008] The first main beam is connected with a plurality of first antenna elements, and the second main beam is connected with a plurality of second antenna elements; the plurality of first antenna elements are arranged at intervals along the length direction of the coaxial line; the first antenna elements and the second antenna elements are symmetrically arranged with respect to the coaxial line.

[0009] As a further description of the above technical solution, the first main beam and the second main beam are tightly connected to the coaxial line through at least one plastic tie.

[0010] As a further description of the above technical solution, a plurality of plastic gaskets are provided between the first main beam and the second main beam.

[0011] As a further description of the above technical solution, the first main beam is tightly connected to the second main beam through a plurality of fastening components.

[0012] As a further description of the above technical solution, the fastening component includes a first fastener and a second fastener;

[0013] In the length direction of the coaxial line, the first main beam is provided with a plurality of first through holes, and the second main beam is provided with a plurality of second through holes corresponding to the first through holes one by one;

[0014] The first fastener sequentially passes through the first through hole and the second through hole to be tightly connected to the second fastener.

[0015] As a further description of the above technical solution, both the first fastener and the second fastener are integrally injection molded with plastic.

[0016] As a further description of the above technical solution, the coaxial line is provided with a plurality of bending portions along its length direction, and the bending portions are correspondingly arranged with the portions of the first main beam provided with the first through holes to form an avoidance space for avoiding the fastening components.

[0017] As a further description of the above technical solution, the first main beam and the first antenna elements are integrally formed;

[0018] The second main beam and the second antenna elements are integrally formed.

[0019] As a further description of the above technical solution, the operating frequencies of the dual-frequency directional log-periodic antenna are 1160 MHz to 1300 MHz and 1559 MHz to 1610 MHz.

[0020] The present invention also provides a drone reconnaissance device, including the dual-frequency directional log-periodic antenna as described above.

[0021] By means of the above technical solutions, the outstanding effects of the present invention are:

[0022] In the dual - frequency directional log - periodic antenna provided by the present utility model, one end of the coaxial cable is provided with a connector, and the other end of the coaxial cable is provided with a feeding part; both the first main beam and the second main beam included in the oscillator unit extend along the length direction of the coaxial cable; the first main beam is located between the coaxial cable and the second main beam, and the first main beam and the second main beam are respectively connected to the feeding part; the first main beam is connected with a plurality of first antenna oscillators, and the second main beam is connected with a plurality of second antenna oscillators; the plurality of first antenna oscillators are arranged at intervals along the length direction of the coaxial cable; the first antenna oscillators and the second antenna oscillators are symmetrically arranged with respect to the coaxial cable, and it can achieve high gain in the frequency bands of 1160 MHz to 1300 MHz and 1559 MHz to 1610 MHz, effectively detect the UAV signal, so as to drive away or shoot down the UAV in time, and the overall shape of the antenna is beautiful, and the electrical performance and cost - performance are optimized. Description of the Drawings

[0023] Figure 1 It is an exploded schematic diagram of the dual - frequency directional log - periodic antenna in the embodiment of the present utility model;

[0024] Figure 2 It is a structural schematic diagram of the dual - frequency directional log - periodic antenna in the embodiment of the present utility model.

[0025] Explanation of the Reference Numerals in the Drawings:

[0026] 1. Coaxial cable; 2. Connector; 3. First main beam; 4. Second main beam; 5. First antenna oscillator; 6. Second antenna oscillator; 7. Plastic tie; 8. Plastic gasket; 9. First fastener; 10. Second fastener; 11. First through - hole; 12. Second through - hole; 13. Bending part; 14. Inner conductor. Detailed Embodiment

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "middle", "lower", "inner", "outer", "front", "back", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following will describe the implementation manner according to the overall structure of the present utility model.

[0029] Please refer to Figures 1 to 2 , the present utility model discloses a dual - frequency directional log - periodic antenna, which includes:

[0030] A coaxial cable 1, one end of the coaxial cable 1 is provided with a connector 2, and the other end of the coaxial cable 1 is provided with a feeding part;

[0031] Oscillator units, the first main beam 3 and the second main beam 4 included in the oscillator units both extend along the length direction of the coaxial cable 1; the first main beam 3 is located between the coaxial cable 1 and the second main beam 4, and the first main beam 3 and the second main beam 4 are respectively connected to the feeding part;

[0032] The first main beam 3 is connected with a plurality of first antenna oscillators 5, and the second main beam 4 is connected with a plurality of second antenna oscillators 6; the plurality of first antenna oscillators 5 are arranged at intervals along the length direction of the coaxial cable 1; the first antenna oscillators 5 and the second antenna oscillators 6 are symmetrically arranged with respect to the coaxial cable 1.

[0033] In the above setting method, one end of the coaxial cable 1 included in the dual-frequency directional log-periodic antenna is provided with a connector 2, and the other end is provided with a feeding part. Both main beams included in the oscillator unit extend along the length direction of the coaxial cable 1, and the first main beam 3 is located between the coaxial cable 1 and the second main beam 4. The first main beam 3 is connected with a plurality of first antenna oscillators 5, and the second main beam 4 is connected with a plurality of second antenna oscillators 6. The first main beam 3 and the second main beam 4 are respectively connected with the feeding part, so that the electromagnetic wave signals received by the first antenna oscillator 5 and the second antenna oscillator 6 can be transmitted to the connector 2 through the coaxial cable 1. It should be understood that the feeding part includes an outer conductor and an inner conductor 14, and can realize the separate connection with the first main beam 3 and the second main beam 4. The plurality of first antenna oscillators 5 are arranged at intervals along the length direction of the coaxial cable 1. The first antenna oscillator 5 and the second antenna oscillator 6 are symmetrically arranged with respect to the coaxial cable 1, which can effectively superimpose electromagnetic waves, and the whole antenna can effectively compress the lobes to form high gain, so as to effectively detect the UAV signal.

[0034] Please refer to Figures 1 to 2 , specifically, in this embodiment, the coaxial cable 1 adopts an RG405 type cable, which is welded to the first main beam 3 through the braided part, that is, the coaxial cable 1 is connected to the first main beam 3 through the outer conductor included in the feeding part. The inner conductor 14 passes through the first main beam 3 and is connected to the second main beam 4 by spot welding.

[0035] Specifically, in this embodiment, the first main beam 3 and the second main beam 4 are tightly connected to the coaxial cable 1 through two self-locking plastic ties 7, thus avoiding the influence of the shaking of the coaxial cable 1 on the electricity and making the antenna stable and firm during the working process.

[0036] Specifically, in this embodiment, three plastic gaskets 8 are provided between the first main beam 3 and the second main beam 4 so that the two main beams connected by locking are spaced apart at the same time.

[0037] Specifically, in this embodiment, the first main beam 3 is tightly connected to the second main beam 4 through 4 fastening components. More specifically, each fastening component includes a first fastener 9 and a second fastener 10; in the length direction of the coaxial cable 1, a plurality of first through holes 11 are arranged on the first main beam 3, and the second main beam 4 is provided with a plurality of second through holes 12 corresponding to the first through holes 11 one by one; the first fastener 9 sequentially passes through the first through hole 11 and the second through hole 12 to be tightly connected to the second fastener 10. For example, the first fastener 9 is a screw, and the second fastener 10 is a matching nut. Specifically, the first fastener 9 and the second fastener 10 are both integrally injection-molded with plastic.

[0038] Specifically, in this embodiment, the coaxial cable 1 is provided with three bending portions 13 along its length direction. After the coaxial cable 1 is fixed to the oscillator unit, each bending portion 13 is equivalent to moving away from the first main beam 3 outward, and at the position corresponding to the first main beam 3 where the first through hole 11 is provided, so as to form an avoidance space for avoiding the fastening assembly with the first main beam 3, thus preventing position interference with the fastening assembly for fastening the first main beam 3 and the second main beam 4.

[0039] Specifically, in this embodiment, the first main beam 3 and the first antenna oscillator 5 are integrally formed by stamping with aluminum material; the second main beam 4 and the second antenna oscillator 6 are integrally formed by stamping with aluminum material.

[0040] Specifically, in this embodiment, the operating frequencies of the dual-frequency directional log-periodic antenna are 1160 MHz to 1300 MHz and 1559 MHz to 1610 MHz. There are many operating frequency bands for drones, and the operating frequencies of the dual-frequency directional log-periodic antenna in this embodiment exactly correspond to important operating frequency bands of drones for high gain, so as to effectively detect drone signals, so as to drive away or shoot down drones in time, and the overall shape of the antenna is beautiful, and the electrical performance and cost performance are optimized.

[0041] Specifically, the present utility model further provides a drone reconnaissance device, including the above-mentioned dual-frequency directional log-periodic antenna, which can accurately and timely detect drone signals, so as to facilitate driving away or shooting down drones in time.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any changes, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A dual-frequency directional log-periodic antenna, characterized in that: Comprising: A coaxial cable, one end of the coaxial cable is provided with a connector, and the other end of the coaxial cable is provided with a feeding part; An oscillator unit, the first main beam and the second main beam included in the oscillator unit both extend along the length direction of the coaxial cable; the first main beam is located between the coaxial cable and the second main beam, and the first main beam and the second main beam are respectively connected to the feeding part; A plurality of first antenna oscillators are connected to the first main beam, and a plurality of second antenna oscillators are connected to the second main beam; the plurality of first antenna oscillators are arranged at intervals along the length direction of the coaxial cable; the first antenna oscillators and the second antenna oscillators are symmetrically arranged with respect to the coaxial cable.

2. The dual-frequency directional log-periodic antenna according to claim 1, characterized in that: The first main beam and the second main beam are tightly connected to the coaxial cable through at least one plastic tie.

3. The dual-frequency directional log-periodic antenna according to claim 1, characterized in that A plurality of plastic gaskets are provided between the first main beam and the second main beam.

4. The dual-band directional log-periodic antenna according to claim 1, characterized in that, The first main beam is tightly connected to the second main beam through a plurality of fastening components.

5. The dual-band directional log-periodic antenna according to claim 4, characterized in that The fastening component includes a first fastener and a second fastener; In the length direction of the coaxial cable, a plurality of first through holes are arranged on the first main beam, and the second main beam is provided with a plurality of second through holes corresponding to the first through holes one by one; The first fastener sequentially passes through the first through hole and the second through hole to be tightly connected to the second fastener.

6. The dual-band directional log-periodic antenna according to claim 5, characterized in that, Both the first fastener and the second fastener are integrally injection molded with plastic.

7. The dual-band directional log-periodic antenna according to claim 4, wherein The coaxial cable is provided with a plurality of bending parts along its length direction, and the bending parts are correspondingly arranged with the parts of the first main beam provided with the first through holes to form an avoidance space for avoiding the fastening components.

8. The dual-band directional log-periodic antenna according to claim 1, characterized in that The first main beam and the first antenna oscillator are integrally formed; The second main beam and the second antenna oscillator are integrally formed.

9. The dual-band directional log-periodic antenna according to claim 1, wherein The operating frequencies of this dual-frequency directional log-periodic antenna are 1160 MHz to 1300 MHz and 1559 MHz to 1610 MHz.

10. A drone reconnaissance device, characterized in that, Comprising the dual-frequency directional log-periodic antenna according to any one of claims 1 to 9.

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