Log-periodic antenna with telescopic device

Abstract

The present invention relates to the field of antenna technology, specifically a logarithmic periodic antenna with a telescopic device, comprising a fixed rod, a support rod and a vibrator, the support rod being mounted on the telescopic head of the fixed rod via a rotating shaft, and the support rod being able to switch to a working state perpendicular to the fixed rod or a coaxial storage state as the telescopic head is raised and lowered; the vibrator is distributed on both sides of the support rod in a logarithmic periodic arrangement, and the vibrator is composed of a plurality of nested telescopic joints, wherein a limit rod and a bottom support with a slide groove are provided in the telescopic joint, and telescopic extension is achieved by sliding cooperation between the slide groove and the limit rod, and when fully extended, the telescopic joint is rotated and fixed by an elastic self-locking mechanism; the synchronous control device also includes a side seat mounted on the support rod, a driving guide rail rotatably mounted on the side seat, and a control slide mounted through the driving guide rail, the control slide being able to be connected to and pushed by the compression head on the top of the vibrator, so as to achieve the purpose of improving the portability and deployment stability of the antenna.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, in particular to a log-periodic antenna with a telescopic device. Background Art

[0002] Log-periodic antennas, due to their broadband characteristics, are widely used in shortwave communications, television broadcasting, radar systems, electronic countermeasures, and modern wireless communications. Their unique log-periodic structure enables them to maintain stable impedance and radiation patterns across multiple octaves, making them ideal for multi-band signal reception and transmission.

[0003] However, in practical applications, most existing log-periodic antennas have fixed antenna elements and cannot be adjusted or retracted, resulting in a large overall antenna size. This makes transportation and installation extremely inconvenient in scenarios such as field surveys and emergency communications, making it difficult to meet rapid response requirements. Some existing foldable antenna designs rely on manual deployment or assembly, which is cumbersome and time-consuming, severely impacting deployment efficiency. Furthermore, they lack effective limiting and guiding mechanisms after deployment, preventing the antenna from reaching its designed state after manual deployment, resulting in poor communication performance. Summary of the Invention

[0004] The object of the present invention is to provide a log-periodic antenna with a telescopic device, so as to improve the portability and deployment stability of the antenna and solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a log-periodic antenna with a telescopic device, comprising a fixed rod, a support rod, and a vibrator, wherein the support rod is mounted on a telescopic head of the fixed rod via a rotating shaft, and the support rod can be switched to a working state perpendicular to the fixed rod or a coaxial storage state as the telescopic head is raised and lowered;

[0006] The vibrators are distributed on both sides of the support rod in a logarithmic periodic arrangement, and the vibrators are composed of multiple nested telescopic sections. A limit rod and a bottom bracket with a slide groove are provided in the telescopic section. The extension and retraction are achieved by the sliding cooperation between the slide groove and the limit rod. When fully extended, the elastic self-locking mechanism allows the telescopic section to rotate and be fixed.

[0007] The invention also includes a synchronous control device, which includes a side seat mounted on the support rod, a drive guide rail rotatably mounted on the side seat, and a control slide mounted through the drive guide rail. The control slide can be connected to and pushed by the compression head on the top of the vibrator to release the self-locking rotation of the telescopic joint and synchronously expand or retract all the vibrators through the rotation of the control slide.

[0008] The side seat and the vibrator are rotatably mounted on the support rod through a rotating seat, and a folding driving structure is provided on the support rod to enable the vibrator and the side seat to be folded as a whole to both sides of the support rod.

[0009] Preferably, the telescopic section is a conical nested structure, and adjacent telescopic sections are slidably connected to the slide groove of the base through a limit rod, and a gap is reserved at the top of the limit rod to allow the base to detach from the limit rod and deflect and lock after full expansion.

[0010] Preferably, the elastic self-locking mechanism is composed of a sliding head, a stopper and a compression spring, and the sliding head is movably installed in the guide groove of the limit rod;

[0011] When the telescopic joint is fully extended, the spring releases its elastic force to deflect the bottom bracket, and the slide groove and the limit rod are misaligned to achieve self-locking.

[0012] Preferably, an inclined deflector seat is provided in the guide groove of the control slideway, and when the deflector seat contacts the compression head, a lateral component force is generated to drive the telescopic section of the vibrator to rotate step by step and reset to the storage position;

[0013] The deflector seat is arranged correspondingly to the vibrator, and the direction of the deflector seat toward the vibrator is an inclined plane.

[0014] Preferably, a top seat is fixedly mounted on the top of the vibrator, and the control slide controls the extension and contraction of the vibrator by pushing the top seat; a rotating rod is provided on the side of the top seat, and the end of the rotating rod is a compression head.

[0015] Preferably, the side seat is installed on one side of all the vibrators on the support rod, and a connecting rod is rotatably installed in the side seat, and a driving guide rail is fixedly installed on the end of the connecting rod, and a control slide that can move forward and backward is installed through the driving guide rail.

[0016] Preferably, the control slide can be connected to the compression head at the top of the vibrator in a limited sliding manner, and the extension and contraction of the vibrator can be controlled by rotating the control slide.

[0017] Preferably, a driving structure is provided in the side seat for controlling the slide, including a lifting seat installed inside the side seat, a first rack is provided on the lifting seat, and a connecting rod is rotatably installed on the side seat, the driving guide rail is installed on the connecting rod, and a first gear is fixedly installed on the mounting shaft of the connecting rod to mesh with the first rack.

[0018] Preferably, a fault is provided on the first rack, and when the control slide rotates to be parallel to the support rod, the first rack is disengaged from the first gear, allowing the connecting rod to rotate freely to further contract the control slide.

[0019] Preferably, a second gear is connected to the rotating shaft of the rotating seat, and a movable frame is installed on the upper limit sliding of the support rod, and a second rack is fixedly installed on the movable frame. The second rack is engaged with the second gears on all rotating seats, and the second rack is driven to move by the push rod on the support rod, so that all vibrators and side seats can be rotated and folded on the support rod.

[0020] Preferably, a fixing part is installed on the telescopic head through a rotating shaft, and the support rod is installed on the fixing part, a third gear is coaxially connected to the fixing part, and a third rack is installed on the fixing rod through a lifting seat. When the telescopic head moves telescopically, the support rod can be rotated through the transmission of the third rack and the third gear.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The portability of the antenna of the present invention is significantly improved. Through the nested telescopic joint structure and the rotatable connection between the support rod and the fixed rod, the antenna can be quickly retracted to a compact form, greatly reducing the storage volume, facilitating transportation and outdoor mobile deployment. Conversely, it can be quickly deployed for use.

[0023] 2. This invention utilizes a linkage design of a control slide, a gear rack mechanism, and a drive rail to achieve one-touch synchronous deployment or storage of all vibrators, eliminating manual section-by-section adjustment and significantly shortening deployment time. The sliding fit between the internal limit rod and the base of the telescopic section, combined with an elastic self-locking mechanism, ensures that the vibrators automatically snap in place after full deployment, preventing displacement caused by external vibration and ensuring a stable antenna radiation pattern.

[0024] 3. Driven by the rotating base, movable frame and second rack, the vibrator and side base can be folded to both sides of the support rod, further compressing the storage space. At the same time, the support rod can be rotated to be coaxial with the fixed rod, forming an integrated portable form.

[0025] 4. After the control slide is separated from the compression head, the vibrator operates independently through a self-locking mechanism, avoiding interference with communication by mechanical components. At the same time, the rotation angle of the support rod is precisely controlled by the gear rack, improving the stability of the working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the antenna of the present invention in use.

[0027] Figure 2 Schematic diagram of the antenna of the present invention in the unfolded state.

[0028] Figure 3 Schematic diagram of the antenna of the present invention in the initial folding state.

[0029] Figure 4 Schematic diagram of the antenna of the present invention in a fully folded state.

[0030] Figure 5 Schematic diagram of the telescopic vibrator structure of the present invention.

[0031] Figure 6 It is a schematic diagram of the internal structure of the expansion joint of the present invention.

[0032] Figure 7It is a schematic diagram of the limiting rod and bottom support structure of the present invention.

[0033] Figure 8 This is a schematic diagram of the control slide installation structure of the present invention.

[0034] Figure 9 Schematic diagram of the control slide structure of the present invention.

[0035] Figure 10 It is a schematic diagram of the internal structure of the side seat of the present invention.

[0036] Figure 11 Schematic diagram of the fixing rod and support rod structure of the present invention.

[0037] Figure 12 Schematic diagram of the movable frame and the second rack structure of the present invention.

[0038] Figure 13 Schematic diagram of the telescopic head structure of the present invention.

[0039] In the figure: 1. Fixed rod; 2. Support rod; 3. Telescopic joint; 4. Limit rod; 5. Bottom support; 6. Slide groove; 7. Guide groove; 8. Block; 9. Elastic member; 10. Sliding head; 11. Top seat; 12. Rotating rod; 13. Compression head; 14. Side seat; 15. Connecting rod; 16. Drive guide rail; 17. Control slide; 18. Deflection seat; 19. Lifting seat; 20. First rack; 21. First gear; 22. Rotating seat; 23. Second gear; 24. Movable frame; 25. Second rack; 26. Push rod; 27. Telescopic head; 28. Fixed member; 29. Third gear; 30. Lifting seat; 31. Third rack. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 13 The present invention provides a technical solution: a logarithmic periodic antenna with a telescopic device, which includes a fixed rod 1, a support rod 2 and a vibrator, wherein the fixed rod 1 is used to fix the antenna as a whole in the use position, and the support rod 2 is installed on the fixed rod 1 as the installation position of the vibrator, and can be routed in the support rod 2. The vibrator is arranged on both sides of the support rod 2 in a logarithmic periodic manner, with a predetermined proportional factor and aperture angle to ensure that the antenna achieves the designed communication effect.

[0042] like Figure 5 、 Figure 6 As shown, the vibrator of the present invention is a telescopic device, which is composed of a nested combination of multiple telescopic joints 3, adopting a "fishing rod-like" structure. The sizes of the telescopic joints 3 from bottom to top are from thick to thin, and are connected in sequence. The vibrator formed by the telescopic joints 3 can be retracted and stored, and can also be unfolded. By setting the length of the telescopic joints 3, when the multiple vibrators on the support rod 2 are fully unfolded, their tops are on an inclined straight line. The angle of the straight line relative to the support rod 2 is the opening angle of the antenna design.

[0043] like Figure 6 、 Figure 7 As shown, a vertical limiting rod 4 is provided on the inner wall of the telescopic section 3, and a bottom bracket 5 is installed at the bottom of the telescopic section 3, and a slide groove 6 is provided on the bottom bracket 5. The sliding connection between the slide groove 6 and the limiting rod 4 can limit the two adjacent telescopic sections 3 and connect them together, and a gap is left between the top of the limiting rod 4 and the top of the telescopic section 3. When the upper telescopic section 3 is completely pulled out from the lower telescopic section 3, the bottom bracket 5 moves to the top of the limiting rod 4. At this time, the slide groove 6 is disengaged from the limiting rod 4, and the bottom bracket 5 and the telescopic section 3 can rotate. Further, A guide groove 7 is provided on the side of the limit rod 4, and a stop block 8 is installed on the bottom surface of the base 5. A sliding head 10 is slidably installed in the guide groove 7, and an elastic member 9 is fixedly connected between the stop block 8 and the sliding head 10. When the slide 6 is connected to the limit rod 4, the elastic member 9 is compressed. When the slide 6 is disengaged from the limit rod 4, the elastic force of the elastic member 9 is released, which enables the base 5 to drive the telescopic joint 3 to rotate. At this time, the slide 6 and the limit rod 4 are misaligned, which can ensure that the two adjacent telescopic joints 3 will not be compressed. Therefore, the vibrator can remain in the expanded state after being stretched.

[0044] like Figure 6 As shown, the top of the vibrator, that is, the top of the uppermost telescopic section 3 is fixedly mounted with a top seat 11. The extension and contraction of the vibrator is controlled by pushing the top seat 11. A rotating rod 12 is provided on the side of the top seat 11, and the end of the rotating rod 12 is a compression head 13. When a vibrator is fully extended, the rotating rod 12 on the top seat 11 will rotate to an inclined state.

[0045] like Figures 8-10As shown, a side seat 14 is installed on one side of all vibrators on the support rod 2, and a connecting rod 15 is rotatably installed in the side seat 14. A driving guide rail 16 is fixedly installed on the end of the connecting rod 15. A control slide 17 that can move forward and backward is installed through the driving guide rail 16. When the control slide 17 is moved forward on the support rod 2 through the driving guide rail 16, the control slide 17 can be connected to the compression head 13 on the top of the vibrator in a limited sliding manner. At this time, the extension and retraction of all vibrators can be controlled by rotating the control slide 17. Taking the deployment of the vibrator as an example, when all the vibrators are in the retracted state, the top seats 11 thereon are at the same height. At this time, the control slide 17 connects all the compression heads 13 therein, and the control slide 17 is driven by the connecting rod 15 to rotate upward to the angle of the antenna angle, so that the vibrator is fully extended and is fixed by the bottom bracket 5. At this time, the control slide 17 can be moved backward and separated from the compression head 13 by driving the guide rail 16, and then the control slide 17 can be rotated downward to a state with an upward angle of 5°-10°, so that the vibrator exists in isolation to avoid affecting its communication effect. Figure 1 shown.

[0046] like Figure 8 、 Figure 9 As shown, a deflector seat 18 is provided in the guide groove of the control slide 17 according to the spacing of the vibrator installation. The deflector seat 18 is an inclined plane facing the vibrator. When the control slide 17 is connected to the compression head 13, the deflector seat 18 can apply a lateral force to the compression head 13, so that the compression head 13 drives the top seat 11 to deflect, and then drives the telescopic joint 3 to rotate from top to bottom in sequence, so that the slide groove 6 on the bottom bracket 5 is aligned with the limit rod 4 again. At this time, the vibrator can be compressed and stored, and the vibrator is contracted by rotating the control slide 17 to a horizontal state. Figure 3 shown.

[0047] like Figure 10 As shown, a driving structure is provided for the control slide 17 in the side seat 14, including a lifting seat 19 installed inside the side seat 14, and a vertical first rack 20 is provided on the lifting seat 19. At the same time, a first gear 21 is fixedly installed on the mounting shaft of the connecting rod 15, and the first rack 20 and the first gear 21 are engaged. When the first rack 20 moves upward, the connecting rod 15 drives the control slide 17 to rotate upward. Conversely, when the first rack 20 moves downward, the connecting rod 15 drives the control slide 17 to rotate downward, and a fault is provided on the upper part of the first rack 20. When the control slide 17 rotates to be parallel to the support rod 2, the first rack 20 can move down to a state of being disengaged from the first gear 21. At this time, the connecting rod 15 can rotate freely, ensuring that the control slide 17 can be further contracted.

[0048] like Figure 3As shown, in addition to being able to be compressed to the shortest state, the vibrator of the present invention can also be further rotated and folded on both sides of the support rod 2. The telescopic section 3 at the bottom of the vibrator is installed on the rotating seat 22, and the rotating seat 22 is fixed on the support rod 2 according to the designed spacing of the vibrator. The telescopic section 3 is connected to the rotating shaft of the rotating seat 22, and the rotating shaft of the rotating seat 22 is connected to the second gear 23. At the same time, the side seat 14 is also installed on the rotating seat 22 with the same structure and can be rotated and folded. The support rod 2 is slidingly mounted with a movable frame 24 on the upper limit, and a second rack 25 is fixedly mounted on the movable frame 24. The second rack 25 is meshed with the second gear 23 on all the rotating seats 22. When the control slide 17 is connected to the end of the vibrator and all vibrators are compressed by rotating downward, the first rack 20 and the first gear 21 are disengaged, and the second rack 25 is driven to move by the push rod 26 on the support rod 2, driving the second gear 23 to rotate, so that all vibrators and side seats 14 are rotated and folded on the support rod 2, further completing the contraction work and improving portability.

[0049] like Figure 13 As shown, at the same time, the support rod 2 of the present invention is installed on the top of the fixed rod 1 in a rotating manner. When the support rod 2 is perpendicular to the fixed rod 1, the antenna is in a working state, and the support rod 2 can also be rotated to be in a straight line with the fixed rod 1, thereby improving its portability. A telescopic head 27 is provided at the top of the fixed rod 1, and a fixing part 28 is installed on the telescopic head 27 through a rotating shaft. The support rod 2 is installed on the fixing part 28, and a third gear 29 is coaxially connected to the fixing part 28. A third rack 31 is also installed on the fixed rod 1 through a lifting seat 30. When the telescopic head 27 moves upward, the support rod 2 can be rotated to a working state perpendicular to the fixed rod 1 by driving the third rack 31 and the third gear 29. After all the vibrators are folded on the support rod 2, the support rod 2 can be rotated to the side of the fixed rod 1 for storage by retracting the telescopic head 27.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A log-periodic antenna with a telescopic device, comprising a fixing rod, a supporting rod, and a vibrator, characterized in that: The support rod is mounted on the telescopic head of the fixed rod via a rotating shaft, and the support rod can be switched to a working state perpendicular to the fixed rod or a coaxial storage state as the telescopic head rises and falls; The vibrators are distributed on both sides of the support rod in a logarithmic periodic arrangement, and the vibrators are composed of multiple nested telescopic sections, each of which is provided with a limit rod and a bottom bracket with a slide groove. The telescopic section is extended and retracted by sliding with the slide groove and the limit rod. When fully extended, the telescopic section is fixed by rotating the elastic self-locking mechanism. The invention also includes a synchronous control device, which includes a side seat mounted on the support rod, a drive guide rail rotatably mounted on the side seat, and a control slide mounted through the drive guide rail. The control slide can be connected to and pushed by the compression head on the top of the vibrator to release the self-locking rotation of the telescopic joint and synchronously expand or retract all the vibrators through the rotation of the control slide. The side seat and the vibrator are rotatably mounted on the support rod via a rotating seat, and a folding drive structure is provided on the support rod to enable the vibrator and the side seat to be folded as a whole to both sides of the support rod.

2. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: The telescopic section is a conical nested structure, and adjacent telescopic sections are slidably connected to the slide groove of the bottom bracket through a limit rod, and a gap is reserved at the top of the limit rod to allow the bottom bracket to detach from the limit rod and deflect and lock after full expansion.

3. The log-periodic antenna with a telescopic device according to claim 2, characterized in that: The elastic self-locking mechanism is composed of a sliding head, a stopper and a compression spring, and the sliding head is movably installed in the guide groove of the limit rod; When the telescopic joint is fully extended, the spring releases its elastic force to deflect the bottom bracket, and the slide groove and the limit rod are misaligned to achieve self-locking.

4. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: An inclined deflector seat is provided in the guide groove of the control slideway. When the deflector seat contacts the compression head, a lateral force component is generated to drive the telescopic section of the vibrator to rotate step by step and return to the storage position. The deflector seat is arranged corresponding to the vibrator, and the direction of the deflector seat toward the vibrator is an inclined plane.

5. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: A top seat is fixedly installed on the top of the vibrator, and the control slide controls the extension and contraction of the vibrator by pushing the top seat; a rotating rod is provided on the side of the top seat, and the end of the rotating rod is a compression head.

6. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: The side seat is installed on one side of all the vibrators on the support rod, and a connecting rod is rotatably installed in the side seat, and a driving guide rail is fixedly installed on the end of the connecting rod. A control slideway that can move forward and backward is installed through the driving guide rail.

7. The log-periodic antenna with a telescopic device according to claim 5, characterized in that: The control slide can be connected to the compression head on the top of the vibrator in a limited sliding manner, and the extension and contraction of the vibrator can be controlled by rotating the control slide.

8. The log-periodic antenna with a telescopic device according to claim 1, wherein: The side seat is provided with a driving structure for controlling the slide, including a lifting seat installed inside the side seat, a first rack is provided on the lifting seat, and a connecting rod is rotatably installed on the side seat, the driving guide rail is installed on the connecting rod, and a first gear is fixedly installed on the mounting shaft of the connecting rod to mesh with the first rack.

9. The log-periodic antenna with a telescopic device according to claim 8, characterized in that: The first rack is provided with a fault. When the control slide rotates to be parallel to the support rod, the first rack is disengaged from the first gear, allowing the connecting rod to rotate freely to further contract the control slide.

10. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: A second gear is connected to the rotating shaft of the rotating seat, and a movable frame is installed on the upper limit sliding of the support rod, and a second rack is fixedly installed on the movable frame. The second rack is engaged with the second gears on all the rotating seats, and the second rack is driven to move by the push rod on the support rod, so that all the vibrators and side seats can be rotated and folded on the support rod.

11. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: A fixing part is installed on the telescopic head through a rotating shaft, and the support rod is installed on the fixing part. A third gear is coaxially connected to the fixing part, and a third rack is installed on the fixing rod through a lifting seat. When the telescopic head moves telescopically, the support rod can be rotated through the transmission of the third rack and the third gear.

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