Log-periodic antenna with telescopic device

Abstract

The invention relates to the technical field of antennas, in particular to a log-periodic antenna with a telescopic device, which comprises a fixed rod, a support rod and an oscillator, and is characterized in that the support rod is mounted on a telescopic head of the fixed rod through a rotating shaft, and the support rod can be switched to a working state perpendicular to the fixed rod or a coaxial storage state along with the lifting of the telescopic head; the vibrators are distributed on the two sides of the supporting rod in a logarithmic periodic arrangement mode, each vibrator is composed of a plurality of nested expansion joints, limiting rods and bottom supports with sliding grooves are arranged in the expansion joints, expansion is achieved through sliding fit of the sliding grooves and the limiting rods, and the expansion joints are made to rotate through elastic self-locking mechanisms to be fixed when being completely unfolded; the antenna further comprises a synchronous control device, the synchronous control device comprises a side seat installed on the supporting rod, a driving guide rail rotationally installed on the side seat and a control slide way installed through the driving guide rail, the control slide way can be connected with a compression head at the top of the oscillator and can be pushed, and the purpose of improving the portability and deployment stability of the antenna is achieved.

Description

Technical Field

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

[0002] Due to its wideband characteristics, the log periodic antenna is widely used in fields such as shortwave communication, television broadcasting, radar systems, electronic countermeasures, and modern wireless communication. Its unique log periodic structure enables it to maintain stable impedance and radiation patterns within multiple octaves, making it an ideal choice for multi-band signal reception and transmission.

[0003] However, in most existing log periodic antennas during practical applications, the lengths of the antenna elements are fixed and cannot be adjusted or retracted, resulting in a relatively large overall size of the antenna. In scenarios such as field surveys and emergency communications, transportation and erection are extremely inconvenient, making it difficult to meet the requirements of rapid response. And currently, some foldable antenna designs rely on manual unfolding or assembly section by section, which is cumbersome and time-consuming, seriously affecting the deployment efficiency. Moreover, there is a lack of effective limiting and guiding mechanisms after unfolding, so that the antenna cannot reach the designed state after being manually unfolded, resulting in poor communication effects. Summary of the Invention

[0004] The purpose of the present invention is to provide a log periodic antenna with a telescopic device to achieve the purpose of improving the portability and deployment stability of the antenna, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A log periodic antenna with a telescopic device, including a fixed rod, a support rod, and antenna elements. The support rod is installed on the telescopic head of the fixed rod through a rotating shaft, and the support rod can be lifted with the telescopic head to switch to a working state perpendicular to the fixed rod or a coaxial retracted state; The antenna elements are distributed on both sides of the support rod in a log periodic arrangement, and the antenna elements are composed of multiple nested telescopic sections. A limiting rod and a bottom support with a chute are arranged inside the telescopic section. The telescopic movement is realized through the sliding cooperation of the chute and the limiting rod, and when fully unfolded, the telescopic section is fixed by an elastic self-locking mechanism to achieve rotation; It further includes a synchronous control device. The synchronous control device includes a side seat installed on the support rod, a driving guide rail rotatably installed on the side seat, and a control slideway installed through the driving guide rail. The control slideway can be connected to and push the compression head at the top of the antenna element, so that the self-locking of the telescopic section is released, and all the antenna elements are synchronously unfolded or retracted through the rotation of the control slideway; The side seat and the antenna element are rotatably installed on the support rod through a rotating seat, and a folding driving structure is arranged on the support rod to fold the antenna element and the side seat as a whole to both sides of the support rod.

[0006] Preferably, the expansion joint is a conical nested structure. The adjacent expansion joints are slidably connected through the limiting rods and the sliding grooves of the bottom bracket, and a gap is reserved at the top of the limiting rods to allow the bottom bracket to disengage from the limiting rods and deflect and lock after being fully expanded.

[0007] Preferably, the elastic self-locking mechanism is composed of a sliding head, a stop block and a compression spring. The sliding head is movably installed in the guiding groove of the limiting rod. When the expansion joint is fully expanded, the spring releases elastic force to deflect the bottom bracket, and the sliding groove and the limiting rod are misaligned to achieve self-locking.

[0008] Preferably, an inclined deflection seat is provided in the guiding groove of the control slideway. When the deflection seat contacts the compression head, a lateral component force is generated to drive the expansion joints of the oscillator to rotate step by step and reset to the storage position. The deflection seat and the oscillator are correspondingly arranged, and the direction of the deflection seat facing the oscillator is an inclined plane.

[0009] Preferably, a top seat is fixedly installed at the top end of the oscillator. The control slideway controls the expansion and contraction of the oscillator by pushing the top seat. A rotating rod is arranged on the side of the top seat, and the end of the rotating rod is a compression head.

[0010] Preferably, the side seat is installed on one side of all the oscillators on the support rod. A connecting rod is rotatably installed in the side seat, and a driving guide rail is fixedly installed at the end of the connecting rod. The control slideway that can move back and forth is installed through the driving guide rail.

[0011] Preferably, the control slideway can be in limiting sliding connection with the compression head at the top of the oscillator, and the expansion and contraction of the oscillator are controlled by the rotation of the control slideway.

[0012] Preferably, a driving structure for the control slideway is provided in the side seat, including a lifting seat installed inside the side seat. A first rack is arranged 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 meshing with the first rack is fixedly installed on the installation shaft of the connecting rod.

[0013] Preferably, a fault is provided on the first rack. When the control slideway rotates to be parallel to the support rod, the first rack disengages from the first gear, allowing the connecting rod to rotate freely to further contract the control slideway.

[0014] Preferably, a second gear is connected to the rotating shaft of the rotating seat, and a movable frame is installed on the support rod in a limiting sliding manner. A second rack is fixedly installed on the movable frame, and the second rack meshes with the second gears on all the rotating seats. By driving the second rack to move through the push rod on the support rod, all the oscillators and the side seat can be rotated and folded on the support rod.

[0015] Preferably, a fixing member is installed on the telescopic head through a rotating shaft, and the support rod is installed on the fixing member. A third gear is coaxially connected to the fixing member, 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.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 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 fixing rod, the antenna can be quickly retracted into a compact form, greatly reducing the storage volume, facilitating transportation and outdoor mobile deployment. Conversely, it can be quickly deployed for use.

[0017] 2. The present invention utilizes the linkage design of the control slideway, the gear-rack mechanism and the driving guide rail to realize the one-key synchronous deployment or storage of all the vibrators, avoiding manual adjustment section by section, significantly shortening the deployment time. The sliding fit between the internal limiting rod and the bottom support of the telescopic joint combined with the elastic self-locking mechanism ensures that the vibrators are automatically clamped and fixed after being fully deployed, preventing displacement caused by external vibration and ensuring the stability of the antenna radiation pattern.

[0018] 3. Driven by the rotating seat, the movable frame and the second rack, the vibrator and the side seat can be integrally 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 fixing rod to form an integrated portable form.

[0019] 4. After the control slideway of the present invention is separated from the compression head, the vibrator works independently through the self-locking mechanism, avoiding interference of mechanical components with communication. 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. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the antenna of the present invention in the use state.

[0021] Figure 2 It is a schematic diagram of the antenna of the present invention in the deployed state.

[0022] Figure 3 It is a schematic diagram of the antenna of the present invention in the preliminary folding state.

[0023] Figure 4 It is a schematic diagram of the antenna of the present invention in the fully folded state.

[0024] Figure 5 It is a schematic diagram of the telescopic vibrator structure of the present invention.

[0025] Figure 6 It is a schematic diagram of the internal structure of the telescopic joint of the present invention.

[0026] Figure 7Schematic diagram of the limit rod and bottom support structure of the present invention.

[0027] Figure 8 Schematic diagram of the control slideway installation structure of the present invention.

[0028] Figure 9 Schematic diagram of the control slideway structure of the present invention.

[0029] Figure 10 Schematic diagram of the internal structure of the side seat of the present invention.

[0030] Figure 11 Schematic diagram of the fixed rod and support rod structure of the present invention.

[0031] Figure 12 Schematic diagram of the movable frame and second rack structure of the present invention.

[0032] Figure 13 Schematic diagram of the telescopic head structure of the present invention.

[0033] In the figure: 1, fixed rod; 2, support rod; 3, telescopic joint; 4, limit rod; 5, bottom support; 6, chute; 7, guide groove; 8, stop 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 slideway; 18, deflection guide 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, fixing member; 29, third gear; 30, lifting seat; 31, third rack. Detailed implementation manners

[0034] Next, in combination with the accompanying drawings and specific implementation manners, the present invention will be further described. It should be noted that, on the premise of non-conflict, any combination can be formed among the following-described embodiments or technical features, and it should be known that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0035] Please refer to Figures 1 to 13 , the present invention provides a technical solution: a log-periodic antenna with a telescopic device. The antenna includes a fixed rod 1, a support rod 2 and an oscillator. Among them, the fixed rod 1 is used to fix the whole antenna at the use position, and the support rod 2 is installed on the fixed rod 1 as the installation position of the oscillator and can route wires in the support rod 2. The oscillators are arranged on both sides of the support rod 2 in a log-periodic manner and have a predetermined scale factor and included angle to ensure that the antenna achieves the designed communication effect.

[0036] As shown in Figure 5 , Figure 6 The oscillator of the present invention is a telescopic device, which is composed of a plurality of telescopic sections 3 nested and combined, adopting a "fishing rod-like" structure. The sizes of the telescopic sections 3 from bottom to top are from thick to thin and are connected in sequence. The oscillator composed of the telescopic sections 3 can be retracted and stored, and can also be unfolded. By setting the length of the telescopic section 3, when a plurality of oscillators on the support rod 2 are fully unfolded, their tops are on an inclined straight line, and the angle of this straight line relative to the support rod 2 is the flare angle of the antenna design.

[0037] As shown in Figure 6 , Figure 7 On the inner wall of the telescopic section 3, there is a vertical limiting rod 4, and at the bottom of the telescopic section 3, there is a bottom support 5. On the bottom support 5, there is a sliding groove 6. Through the sliding connection between the sliding groove 6 and the limiting rod 4, two adjacent telescopic sections 3 can be limited and movably connected together, and there is a gap 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 support 5 moves to the top of the limiting rod 4. At this time, the sliding groove 6 is separated from the limiting rod 4, and the bottom support 5 and the telescopic section 3 can rotate. Further, on the side of the limiting rod 4, there is a guiding groove 7, and on the bottom surface of the bottom support 5, there is a stopper 8. A sliding head 10 is slidably installed in the guiding groove 7, and an elastic member 9 is fixedly connected between the stopper 8 and the sliding head 10. When the sliding groove 6 is connected to the limiting rod 4, the elastic member 9 is compressed. When the sliding groove 6 is separated from the limiting rod 4, the elastic force of the elastic member 9 is released, which can make the bottom support 5 drive the telescopic section 3 to rotate. At this time, the sliding groove 6 is misaligned with the limiting rod 4, which can ensure that two adjacent telescopic sections 3 will not be compressed. Therefore, the oscillator can be kept in the unfolded state after being stretched.

[0038] As shown in Figure 6 At the top end of the oscillator, that is, at the top end of the uppermost telescopic section 3, a top seat 11 is fixedly installed. The telescoping of the oscillator is controlled by pushing the top seat 11. On the side of the top seat 11, there is a rotating rod 12, and the end of the rotating rod 12 is a compression head 13. When an oscillator is fully stretched, the rotating rod 12 on the top seat 11 will rotate to an inclined state.

[0039] As shown in Figures 8 - 10As shown, on one side of all the oscillators on the support rod 2, a side seat 14 is installed. A connecting rod 15 is rotatably installed in the side seat 14. A driving guide rail 16 is fixedly installed at the end of the connecting rod 15. A control slideway 17 capable of moving back and forth is installed through the driving guide rail 16. When the control slideway 17 is moved forward on the support rod 2 through the driving guide rail 16, the control slideway 17 can be in limiting sliding connection with the compression head 13 at the top of the oscillator. At this time, the expansion and contraction of all the oscillators can be controlled by the rotation of the control slideway 17. Taking the expansion of the oscillator as an example, when all the oscillators are in the retracted state, the top seats 11 on them are at the same height. At this time, the control slideway 17 connects all the compression heads 13 therein. The connecting rod 15 drives the control slideway 17 to rotate up to the angle of the antenna opening angle, so that the oscillator is fully extended, and the clamping and fixing are completed through the bottom support 5. At this time, the control slideway 17 can be moved backward through the driving guide rail 16 to be separated from the compression head 13, and then the control slideway 17 is rotated down to a state where the upper inclined angle is 5° - 10°, so that the oscillator exists independently, avoiding affecting its communication effect, as Figure 1 shown.

[0040] As Figure 8 , Figure 9 shown, in the guide groove of the control slideway 17, deflection guide seats 18 are arranged according to the installation spacing of the oscillators. The direction of the deflection guide seat 18 facing the oscillator is an inclined plane. When the control slideway 17 is connected to the compression head 13, the deflection guide 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 joints 3 to rotate in sequence from top to bottom, so that the chute 6 on the bottom support 5 is aligned with the limit rod 4 again. At this time, the oscillator can be compressed and stored. Through the process of the control slideway 17 rotating to the horizontal state, the oscillator contracts, as Figure 3 shown.

[0041] As Figure 10 shown, a driving structure is arranged in the side seat 14 for the control slideway 17, including a lifting seat 19 installed inside the side seat 14. A vertical first rack 20 is arranged on the lifting seat 19. At the same time, a first gear 21 is fixedly installed on the installation shaft of the connecting rod 15. The first rack 20 and the first gear 21 are meshed. When the first rack 20 moves upward, the connecting rod 15 drives the control slideway 17 to rotate upward. On the contrary, when the first rack 20 moves downward, the connecting rod 15 drives the control slideway 17 to rotate downward. And a fault is arranged at the upper part of the first rack 20. When the control slideway 17 rotates to be parallel to the support rod 2, the first rack 20 can move downward to a state of disengaging from the first gear 21. At this time, the connecting rod 15 can rotate freely, ensuring that the control slideway 17 can contract further.

[0042] As Figure 3As shown, in addition to being able to be compressed to the shortest state, the oscillator of the present invention can also be further rotated and folded on both sides of the support rod 2. The telescopic joint 3 at the bottom of the oscillator is installed on the rotating seat 22. The rotating seat 22 is fixed on the support rod 2 according to the designed spacing of the oscillator. The telescopic joint 3 is connected to the rotating shaft of the rotating seat 22, and a second gear 23 is connected to the rotating shaft of the rotating seat 22. 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 movable frame 24 is installed on the support rod 2 in a limited sliding manner, and a second rack 25 is fixedly installed on the movable frame 24. The second rack 25 meshes with the second gears 23 on all the rotating seats 22. When the control slideway 17 is connected to the end of the oscillator and all the oscillators are compressed by downward rotation, at this time, 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 the oscillators and the side seat 14 are rotated and folded on the support rod 2, further completing the contraction work and improving the portability.

[0043] As Figure 13 shown, at the same time, the support rod 2 of the present invention is installed at 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 the working state, and the support rod 2 can also be rotated to be in a straight line with the fixed rod 1 to improve its portability. The top end of the fixed rod 1 is provided with a telescopic head 27. A fixing member 28 is installed on the telescopic head 27 through a rotating shaft. The support rod 2 is installed on the fixing member 28, and a third gear 29 is coaxially connected to the fixing member 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, through the drive of the third rack 31 and the third gear 29, the support rod 2 can be rotated to the working state perpendicular to the fixed rod 1. After all the oscillators are folded on the support rod 2, by retracting the telescopic head 27, the support rod 2 can be rotated to the side of the fixed rod 1 for storage.

[0044] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Log-periodic antenna with a telescopic device, comprising a fixed rod, a support rod and an oscillator, characterized in that: The support rod is installed on the telescopic head of the fixed rod through 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 a plurality of nested telescopic joints, in which a limit rod and a bottom bracket with a slide groove are provided, and the telescopic joint is telescoped by the 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; It also includes a synchronous control device, which includes a side seat installed on the support rod, a driving guide rail rotatably installed on the side seat, and a control slideway installed through the driving guide rail, wherein the control slideway can be connected to and pushed by the compression head on the top of the vibrator, so that the telescopic joint rotates to release the self-locking, and all the vibrators are synchronously unfolded or stored through the rotation of the control slideway; The side seat and the vibrator are rotatably mounted on the support rod via 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.

2. The log-periodic antenna with a telescopic device according to claim 1, wherein: 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 slot 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, and a lateral force component is generated when the deflector seat contacts the compression head, driving the telescopic section of the vibrator to rotate step by step and reset 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 arranged 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 with the compression head at the top of the vibrator in a limited sliding manner, and the extension and retraction of the vibrator can be controlled by rotating the control slide.

8. The log-periodic antenna with a telescopic device according to claim 1, characterized in that: A driving structure is provided in the side seat for controlling the slideway, 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, and when the control slideway 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 slideway.

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 slidably installed on the upper limit position of the support rod, and a second rack is fixedly installed on the movable frame. The second rack is meshed with the second gears on all the rotating seats. 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 member is installed on the telescopic head through a rotating shaft, and the support rod is installed on the fixing member. A third gear is coaxially connected to the fixing member, 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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