Dipole antenna with electrically adjustable oscillator length

Abstract

The utility model relates to the technical field of antennas, in particular to a dipole antenna with an electrically adjustable oscillator length, which comprises a fixing unit, an oscillator length adjusting unit and an oscillator length adjusting unit, and is characterized in that the fixing unit comprises a fixing column and a clamping piece, one end of the fixing column is fixedly connected with the clamping piece, and the fixing column is hollow; the dipole antenna is connected with the fixing unit; the driving unit comprises a stepping motor and a synchronizing device, the stepping motor is located in the fixing column and fixedly connected with the fixing column, and the synchronizing device is in meshed connection with the output end of the stepping motor and fixedly connected with the dipole antenna; the waterproof unit comprises a waterproof plate, and the waterproof plate is located on the fixing column and is parallel to the stepping motor; and the adjusting unit is fixedly connected with the dipole antenna, and the adjusting unit is fixedly connected with the driving unit, so that the environmental adaptability and the functional diversity of the antenna are improved by arranging the adjusting unit.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and more specifically, to a dipole antenna with electrically adjustable vibrator length. Background Technology

[0002] Dipole antennas are one of the most basic and widely used antenna types in the field of wireless communication. They consist of two symmetrical conductor elements that excite electromagnetic waves to radiate or receive through a central feed point. Their operating frequency is directly related to the physical length of the elements: the length of a traditional dipole is usually designed to be 1 / 2 of the operating wavelength (half-wave dipole), thereby achieving efficient energy conversion in the resonant state.

[0003] However, existing dipole antennas have a narrow frequency response range. Once the physical size is fixed, their operating frequency band is strictly limited. This characteristic becomes a significant bottleneck in multi-band communication, dynamic environment adaptation, or scenarios that require frequency flexibility. When users need to switch frequency bands to avoid interference or adapt to protocol changes, existing dipole antennas are difficult to meet such requirements.

[0004] Therefore, there is an urgent need for a dipole antenna with electrically adjustable oscillator length to solve the problems existing in the current technology. Utility Model Content

[0005] In view of this, this utility model proposes a dipole antenna with electrically adjustable oscillator length, aiming to solve the problem of difficult frequency band switching of existing dipole antennas.

[0006] This utility model provides a dipole antenna with electrically adjustable vibrator length, comprising:

[0007] A fixing unit, comprising a fixing post and a clamping member, wherein one end of the fixing post is fixedly connected to the clamping member, and the fixing post is hollow inside;

[0008] A dipole antenna, wherein the dipole antenna is connected to the fixed unit;

[0009] The driving unit includes a stepper motor and a synchronization device. The stepper motor is located inside the fixed column and is fixedly connected to the fixed column. The synchronization device is engaged with the output end of the stepper motor and is fixedly connected to the dipole antenna.

[0010] A waterproof unit includes a waterproof plate, which is located on the fixed column and is arranged parallel to the stepper motor;

[0011] An adjustment unit is fixedly connected to the dipole antenna, and the adjustment unit is fixedly connected to the drive unit.

[0012] Furthermore, the synchronization device includes a driving bevel gear and two driven bevel gears. The driving bevel gear is fixedly connected to the output end of the stepper motor, and the two driven bevel gears mesh on both sides of the driving bevel gear.

[0013] Furthermore, the adjusting unit includes an adjusting rod, an adjusting nut, an angular contact bearing, and a deep groove ball bearing. The adjusting rod has an axially threaded surface. The side of the adjusting rod closest to the driven bevel gear is fixedly connected to the inner ring of the angular contact bearing, and the adjusting rod is also fixedly connected to the driven bevel gear. The adjusting nut is sleeved on the adjusting rod, and the inner ring of the deep groove ball bearing is fixedly connected to the side of the adjusting rod away from the driven bevel gear.

[0014] Furthermore, the adjusting nut includes a lead screw nut, a fixed flange, a rolling element, and a threaded channel. The lead screw nut is fixedly connected to the fixed flange, the threaded channel is provided on the lead screw nut, and the rolling element is provided on the threaded channel. The fixed flange is fixedly connected to the dipole antenna.

[0015] Furthermore, the waterproof membrane includes a waterproof shell, a waterproof baffle, a ventilated base plate, and a dustproof net. The waterproof shell is connected to the ventilated base plate. The waterproof baffle is installed inside the waterproof shell, and the cross-section of the waterproof baffle is Z-shaped. Several waterproof baffles are installed. The ventilated base plate and the dustproof net are arranged parallel to each other.

[0016] Furthermore, the waterproof baffles are installed inside the waterproof shell in a staggered manner from left to right, with a certain gap left between adjacent waterproof baffles during the overlap.

[0017] Furthermore, the waterproof membrane also includes a drain outlet, which is provided on the lower surface of the waterproof shell.

[0018] Furthermore, the waterproof unit also includes an isolation plate and a waterproof sheet. A plurality of waterproof sheets are provided, and the plurality of waterproof sheets are fixedly connected to the stepper motor. The isolation plate is disposed between the stepper motor and the fixed column, and the isolation plate is fixedly connected through the waterproof sheets.

[0019] Furthermore, it also includes a guide unit, which includes a slide groove and a slide rail. The fixed flange is provided with a slide rail, and the clamping member is provided with a slide groove.

[0020] Furthermore, the waterproof sheet is provided with an alumina ceramic coating.

[0021] Compared with existing technologies, the advantages of this invention are as follows: By rigidly connecting one end of the fixing column to the clamping component, this invention achieves overall structural stability and compactness. The hollow interior of the fixing column not only reduces the overall weight but also provides ample space for the layout of internal components. The clamping component, acting as a connecting hub, supports the rotation of the dipole antenna and ensures reliable docking with the fixing unit, improving mechanical strength and vibration resistance while reducing the impact of the external environment on internal components. The coordinated drive of the stepper motor and the synchronization device enables control of the dipole antenna adjustment process. The step-by-step rotation characteristics of the stepper motor, combined with the transmission of the synchronization device, ensure the symmetry and consistency of the antenna movement. The drive unit, built into the fixing column, improves space utilization and adjustment efficiency, reducing the complexity and energy loss of the mechanical transmission chain. The waterproof plate of the waterproof unit prevents water penetration, avoiding the risk of short circuits or insulation failure of the stepper motor. The linkage between the adjustment unit, the dipole antenna, and the drive unit enhances overall coordination. Through mechanical or electronic feedback mechanisms, the adjustment unit can respond to changes in antenna status in real time and work with the drive unit to fine-tune the antenna length, improving adjustment accuracy and response speed while reducing the frequency of manual intervention and operational complexity. Attached Figure Description

[0022] Figure 1 A schematic diagram of an electrically adjustable dipole antenna for an embodiment of this utility model;

[0023] Figure 2 A cross-sectional view of a dipole antenna with electrically adjustable oscillator length provided in an embodiment of this utility model;

[0024] Figure 3 A cross-sectional view of the adjusting nut in a dipole antenna with electrically adjustable oscillator length provided in an embodiment of this utility model;

[0025] Figure 4 A front view of the waterproof plate in the electrically adjustable dipole antenna provided in an embodiment of this utility model;

[0026] Figure 5 Bottom view of the waterproof plate in the electrically adjustable dipole antenna provided in this embodiment of the utility model;

[0027] Figure 6 A side view of the stepper motor in a dipole antenna with electrically adjustable oscillator length provided in an embodiment of this utility model.

[0028] The components include: 1. Fixing unit; 101. Fixing column; 102. Clamping component; 2. Dipole antenna; 3. Driving unit; 301. Stepper motor; 302. Driving bevel gear; 303. Driven bevel gear; 304. Isolation plate; 305. Waterproof sheet; 4. Waterproof unit; 401. Waterproof plate; 402. Waterproof housing; 403. Waterproof baffle; 404. Ventilation base plate; 405. Drain outlet; 406. Dustproof net; 5. Adjusting unit; 501. Adjusting rod; 502. Adjusting nut; 503. Angular contact bearing; 504. Deep groove ball bearing; 505. Thread; 506. Threaded channel; 507. Rolling element; 508. Fixing flange; 509. Screw nut; 6. Slide groove; 7. Slide rail; 8. Vibrator wire. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] See Figure 1-2 As shown, this embodiment provides a dipole antenna with electrically adjustable oscillator length, including: a fixing unit 1, the fixing unit 1 including a fixing post 101 and a clamping member 102, one end of the fixing post 101 is fixedly connected to the clamping member 102, and the fixing post 101 is hollow inside.

[0034] Two dipole antennas 2 are provided, located on both sides of the fixed unit 1.

[0035] The drive unit 3 includes a stepper motor 301 and a synchronization device. The stepper motor 301 is located inside the fixed post 101 and is fixedly connected to the fixed post 101. The synchronization device is engaged with the output end of the stepper motor 301 and is fixedly connected to the dipole antenna 2.

[0036] The waterproof unit 4 includes a waterproof plate 401, which is located on the fixed column 101 and is arranged parallel to the stepper motor 301.

[0037] The adjustment unit 5 is fixedly connected to the dipole antenna 2, and the adjustment unit 5 is also fixedly connected to the drive unit 3.

[0038] Specifically, the fixing post 101 is grounded at one end and connected to the clamping member 102 at the other end for fixing the dipole antenna 2. The fixing post 101 is hollow inside, and the stepper motor 301 is installed inside it. The length of the dipole antenna 2 can be adjusted via the adjustment unit 5. The operation involves the stepper motor 301 driving the adjustment unit 5 to rotate, which in turn causes the adjustment unit 5 to extend or shorten the dipole antenna 2. When the stepper motor 301 rotates, it drives the adjustment unit 5 to rotate synchronously via a synchronization device. The adjustment unit 5 is then fixedly connected to the dipole antenna 2, thus causing the dipole antenna 2 to move. The waterproof unit 4 prevents water penetration, avoiding the risk of short circuits or insulation failure of the stepper motor 301. To achieve flexible adjustment of the conductor length, the length of the conductor is changed by adjusting the dipole antenna. The length of the antenna directly affects its resonant frequency and radiation characteristics. By adjusting the length of the dipole antenna, the impedance matching and radiation efficiency of the antenna can be changed, thereby indirectly affecting the signal transmission characteristics on the conductor.

[0039] Understandably, the rigid connection between the fixing post 101 and the clamping member 102 enhances the stability and reliability of the overall structure through integration. The hollow interior of the fixing post 101 provides space for the integration of internal components while ensuring mechanical strength, and the grounded layout at one end effectively releases electrostatic interference, improving electromagnetic interference resistance and environmental adaptability. The clamping member 102, as a connecting hub, not only achieves the stable installation of the dipole antenna 2, but also provides physical support for the dynamic adjustment of the antenna through an adjustable fixing method, reducing the risk of performance fluctuations caused by structural loosening or vibration, and improving deployment efficiency and maintenance convenience. The symmetrical layout of the dual dipole antennas 2, combined with the linkage control of the adjustment unit 5, gives the antenna length and operating frequency real-time adjustment capability. By driving the adjustment unit 5 with the stepper motor 301 to change the length of the vibrator, it can quickly adapt to the communication needs of different frequency bands, improving the multi-frequency compatibility and spectrum utilization of the antenna. At the same time, the extension and retraction adjustment of the dipole can optimize the radiation efficiency and directivity of the antenna, reducing impedance mismatch problems caused by environmental changes (such as temperature, nearby objects). The stepper motor 301 and the synchronization device work together to control the adjustment process of the dipole antenna 2. The step-by-step driving characteristics of the stepper motor 301, combined with the transmission engagement of the synchronization device, ensure that the length changes of both antennas are strictly synchronized, improving the symmetry and consistency of the adjustment. The structure of the drive unit 3 built into the fixing post 101 shortens the power transmission path, reduces energy loss and mechanical transmission noise, and avoids the risk of wear caused by external mechanical exposure. The waterproof unit 4 prevents rainwater, moisture, and dust from entering the fixing post 101 in rainy conditions, and also prevents rainwater from penetrating the stepper motor, avoiding the risk of short circuits or insulation failure of the stepper motor and improving the stability of the antenna.

[0040] In some embodiments of this application, the synchronization device includes a driving bevel gear 302 and two driven bevel gears 303. The driving bevel gear 302 is fixedly connected to the output end of the stepper motor 301, and the two driven bevel gears 303 mesh on both sides of the driving bevel gear 302.

[0041] Specifically, the output end of the stepper motor 301 is provided with an active bevel gear 302, which is driven to rotate by the stepper motor 301. Two driven bevel gears 303 are provided on both sides of the active bevel gear 302. The length of the dipole antenna 2 can be controlled by the synchronous control of the adjustment unit 5 through the two driven bevel gears 303.

[0042] Understandably, the meshing of the active bevel gear 302 and the dual driven bevel gears 303 ensures precise gear transmission, guaranteeing strict synchronization of the length adjustment of the dipole antennas 2 on both sides. The center-driven mode of the active gear, combined with the symmetrical layout of the driven gears, eliminates motion deviations caused by uneven power distribution, improving the symmetry and consistency of the adjustment process. This synchronization mechanism avoids impedance mismatch or pattern distortion caused by length differences between the two vibrators, reducing the risk of communication quality fluctuations. The right-angle meshing characteristic of the bevel gears efficiently converts the axial rotation of the stepper motor 301 into vertical power output of the driven gears, shortening the physical span of the transmission chain. The compact layout of the gear assembly fully utilizes the hollow structure inside the fixed column 101, improving space utilization and mechanical integration, while reducing volume redundancy or center of gravity shift caused by external extension mechanisms. The meshing and rigid transmission of the bevel gears reduce elastic deformation and slippage in traditional linkage or belt drives, improving the reliability and accuracy of power transmission. The wear-resistant properties of the gear materials (such as surface hardening treatment or self-lubricating coating), combined with the enclosed installation environment, can isolate external dust and moisture corrosion, reducing mechanical wear and the probability of failure during long-term use. The coordinated drive of the stepper motor 301 and the bevel gear set enables the adjustment of the dipole antenna 2's length. The tooth-by-tooth meshing characteristics of the driving gear, combined with the step-by-step control logic of the stepper motor 301, improve the discrete accuracy and repeatability of the length adjustment. The synchronous response of the driven gears on both sides further eliminates adjustment lag or accumulated errors, reduces positioning deviations caused by mechanical backlash, and provides a hardware foundation for real-time frequency adaptation in complex electromagnetic environments.

[0043] In some embodiments of this application, the adjustment unit 5 includes an adjustment rod 501, an adjustment nut 502, an angular contact bearing 503, and a deep groove ball bearing 504. The surface of the adjustment rod 501 is axially provided with a thread 505. The side of the adjustment rod 501 near the driven bevel gear 303 is fixedly connected to the inner ring of the angular contact bearing 503, and the adjustment rod 501 is fixedly connected to the driven bevel gear 303. The adjustment nut 502 is sleeved on the adjustment rod 501, and the inner ring of the deep groove ball bearing 504 is fixedly connected to the side of the adjustment rod 501 away from the driven bevel gear 303.

[0044] In some embodiments of this application, see Figure 3 As shown, the adjusting nut 502 includes a lead screw nut 509, a fixed flange 508, a rolling element 507, and a threaded channel 506. The lead screw nut 509 is fixedly connected to the fixed flange 508. The lead screw nut 509 has a threaded channel 506, and the rolling element 507 is provided on the threaded channel 506. The fixed flange 508 is fixedly connected to the dipole antenna 2.

[0045] Specifically, the adjusting rod 501 is a lead screw, which is connected to the driven bevel gear 303 through an angular contact bearing 503. The angular contact bearing 503 is fixedly connected to the inner wall of the dipole antenna 2 through a bearing seat. Similarly, the deep groove ball bearing 504 is also fixedly connected to the dipole antenna 2. When the driven bevel gear 303 starts to rotate, it drives the adjusting rod 501 to rotate. The adjusting rod 501 is equipped with an adjusting nut 502, which is fixedly connected to the dipole antenna 2. Thus, the adjusting nut 502 drives the dipole antenna 2 to move, thereby achieving extension or shortening.

[0046] Understandably, the combination of angular contact bearing 503 and deep groove ball bearing 504, through a multi-directional load-sharing mechanism, takes into account both the axial and radial force requirements of the adjusting rod 501. The fixed support of angular contact bearing 503 suppresses axial movement of adjusting rod 501 during high-speed rotation, improving the stability and positioning accuracy of the transmission process. The auxiliary support of deep groove ball bearing 504 distributes the radial load, reducing the risk of vibration and wear caused by eccentric rotation, thereby maintaining the smoothness of the transmission chain and laying the foundation for the length adjustment of dipole antenna 2. The rolling elements 507 and threaded channels 506 of adjusting nut 502 transform traditional sliding friction into rolling friction, reducing the frictional resistance between adjusting rod 501 and the nut contact surface. The uniform distribution of rolling elements 507 ensures the distributed transmission of load, improving transmission efficiency and smoothness of movement, while reducing energy loss and the risk of local overheating. The fixed connection between fixed flange 508 and dipole antenna 2 further strengthens the reliability of the power transmission path, reducing adjustment lag or deviation accumulation caused by loose connection. The threaded engagement of the lead screw nut 509 and the adjusting rod 501, through machining and preload optimization, enables rapid response to dynamic loads. During the extension and retraction of the dipole antenna 2, the tight meshing of the threaded nut 509 adapts to changes in external resistance, enhancing the adaptive capability and shock resistance of the adjustment process. Combined with the lubrication and sealing of the bearing assembly, this reduces the probability of wear and fatigue failure of the threaded nut 505 under long-term high-frequency adjustment, extending the service life of the core transmission components.

[0047] In some embodiments of this application, see Figure 4-5 As shown, the waterproof membrane 401 includes a waterproof shell 402, a waterproof baffle 403, a ventilated base plate 404, and a dustproof net 406. The waterproof shell 402 is connected to the ventilated base plate 404. The waterproof baffle 403 is provided inside the waterproof shell 402, and the cross-section of the waterproof baffle 403 is Z-shaped. Several waterproof baffles 403 are provided. The ventilated base plate 404 and the dustproof net 406 are arranged in parallel and opposite to each other.

[0048] Specifically, ventilation base plates 404 are provided on both sides of the outer protective shell, and a dustproof net 406 is provided in the middle of the ventilation base plate 404, which can block dust from entering without affecting its ventilation, while the Z-shaped waterproof baffle 403 can prevent water vapor from entering the motor.

[0049] Understandably, the waterproof housing 402 prevents external moisture and liquids from entering the motor, thus preventing damage due to moisture or water ingress and improving the equipment's waterproof performance and operational safety. The Z-shaped cross-section design of the waterproof baffle 403 allows moisture to be blocked and diverted multiple times when entering the ventilation base plate 404, further enhancing the waterproof effect. Secondly, the parallel and opposing arrangement of the ventilation base plate 404 and the dustproof net 406 ensures ventilation efficiency while preventing dust and particles from entering the motor, preventing dust accumulation from affecting motor performance and lifespan. This not only improves the equipment's dustproof capability but also reduces maintenance frequency and costs, extending the equipment's lifespan. Furthermore, the Z-shaped structure of the waterproof baffle 403 also provides good guidance, ensuring that the stepper motor 301 maintains a suitable temperature during long-term operation.

[0050] In some embodiments of this application, the waterproof baffles 403 are installed inside the waterproof housing 402 in a staggered manner from left to right, with a certain gap left between adjacent waterproof baffles 403 during the overlap.

[0051] In some embodiments of this application, the waterproof membrane 401 further includes a drain outlet 405, and the lower surface of the waterproof housing 402 is provided with the drain outlet 405.

[0052] Understandably, the waterproof baffles 403 are staggered and overlapped from left to right inside the waterproof housing 402, which extends the flow path of water vapor or liquid and increases the number of times water vapor is blocked when entering the ventilation base plate 404, thereby improving the waterproof effect. A certain gap is left between adjacent waterproof baffles 403 during overlap, ensuring waterproof performance without obstructing airflow and maintaining the unobstructed flow of the ventilation base plate 404. Furthermore, the drainage outlet 405 further enhances the practicality of the waterproof plate 401. The drainage outlet 405 on the lower surface of the waterproof housing 402 allows for the timely discharge of small amounts of water vapor or liquid entering the waterproof housing 402, preventing water vapor accumulation inside the housing and affecting the normal operation of the equipment. This not only improves the waterproof capability of the equipment but also reduces the risk of corrosion or damage caused by water vapor accumulation, extending the service life of the equipment. In addition, the staggered and overlapping waterproof baffles 403 also optimize the airflow direction, improve ventilation efficiency, and ensure that the motor maintains a suitable temperature during long-term operation.

[0053] In some embodiments of this application, see Figure 6As shown, the waterproof unit 4 also includes an isolation plate 304 and a waterproof sheet 305. Several waterproof sheets 305 are provided, and several waterproof sheets are fixedly connected to the stepper motor 301. The isolation plate 304 is provided between the stepper motor 301 and the fixed column 101, and the isolation plate 304 is fixedly connected through the waterproof sheet 305.

[0054] Understandably, multiple waterproof sheets 305 are fixed to the surface of the stepper motor 301, effectively protecting the motor windings and other components, thus preventing the stepper motor 301 from being affected by rainwater erosion and ensuring its continuous and stable operation under high load conditions. The isolation plate 304, made of non-metallic or composite materials (such as ceramic-filled polymers), provides both rainwater isolation and electromagnetic shielding. It blocks the coupling of electromagnetic noise generated by the stepper motor 301 to the dipole antenna 2 and the radio frequency circuit, improving the purity of the communication signal and the consistency of the radiation pattern. The grounding of the waterproof sheets 305 and the isolation plate 304 further forms a closed shielding loop, reducing the negative impact of high-frequency interference on signal reception sensitivity and ensuring reliable communication in complex electromagnetic environments. The integration of the waterproof sheets 305 and the isolation plate 304, in addition to its waterproof function, also strengthens the internal structural support of the fixing column 101. The waterproof sheet 305 serves as a connector to fix the isolation plate 304 to the motor, forming a distributed mechanical load-bearing network, which improves the overall vibration resistance and deformation resistance of the component.

[0055] In some embodiments of this application, a guide unit is also included. The guide unit includes a slide groove 6 and a slide rail 7. The slide rail 7 is provided on the fixed flange 508, and the slide groove 6 is provided on the clamping member 102.

[0056] Understandably, the cooperation between the slide rail 7 and the groove 6 provides linear constraint for the telescopic movement of the dipole antenna 2. The guiding characteristics of the slide rail 7 and the slide rail 6 suppress the offset or sway caused by external loads or vibrations during the adjustment process, improve the linearity and trajectory controllability of the antenna length adjustment, avoid mechanical stress concentration caused by non-axial movement, and reduce the risk of deformation or wear of transmission components due to uneven force. The slide rail 7 is integrated into the fixed flange 508, and the slide rail 6 is opened in the clamping part 102, realizing the seamless integration of the guiding unit and the main structure. The rigid support of the slide rail 7 and the inclusive layout of the slide rail 6 form a distributed force network, improving the bending stiffness and torsional performance of the overall structure. At the same time, the guiding unit disperses the axial force transmitted by the adjusting nut 502, reduces the local load pressure on key transmission components (such as lead screws and bearings), and extends the service life of core components.

[0057] In some embodiments of this application, the waterproof sheet 305 is provided with an alumina ceramic coating.

[0058] Understandably, the dense microstructure of alumina ceramic coatings, with a porosity typically below 1%, effectively blocks water molecule penetration. Compared to ordinary metal or polymer coatings, which may contain micron-sized pores, the pore size of alumina ceramic coatings can be controlled at the nanometer level, thus enhancing the overall waterproof capability of the antenna. Furthermore, the chemical inertness and corrosion resistance of the alumina ceramic coating can resist the erosion of the waterproof sheet 305 substrate by humid, salt spray, acidic, or alkaline environments. The dense chemical barrier on the coating surface prevents direct contact between moisture, contaminants, and the metal substrate, improving the aging resistance of the waterproof sheet 305 in harsh climates or industrial environments, while reducing the risk of waterproof performance degradation due to corrosion. In addition, the high-temperature stability of the coating (such as resistance to melting and oxidation) ensures the structural integrity of the waterproof sheet 305 under extreme temperature conditions, reducing the probability of cracking or peeling caused by thermal cycling stress, improving the electromagnetic isolation between the waterproof unit 4 and the RF circuit, and reducing the negative impact of the waterproof sheet 305 on the antenna's near-field distribution or signal reception sensitivity, providing additional protection for the safe operation of high-sensitivity communication equipment.

[0059] The electrically adjustable dipole antenna in the above embodiments achieves overall structural stability and compactness by rigidly connecting one end of the fixing post to the clamping member. The hollow interior of the fixing post not only reduces the overall weight but also provides ample space for the layout of internal components. The clamping member, acting as a connecting hub, supports the rotation of the dipole antenna and ensures reliable docking with the fixing unit, improving mechanical strength and vibration resistance while reducing the impact of the external environment on internal components. The coordinated drive of the stepper motor and the synchronization device controls the adjustment process of the dipole antenna. The step-by-step rotation characteristics of the stepper motor, combined with the transmission of the synchronization device, ensure the symmetry and consistency of the antenna movement. The drive unit, built into the fixing post, improves space utilization and adjustment efficiency, reducing the complexity and energy loss of the mechanical transmission chain. The waterproof plate of the waterproof unit prevents water penetration, avoiding the risk of short circuits or insulation failure of the stepper motor. The linkage between the adjustment unit, the dipole antenna, and the drive unit enhances overall coordination. Through mechanical or electronic feedback mechanisms, the adjustment unit can respond to changes in antenna status in real time and work with the drive unit to fine-tune the antenna length, improving adjustment accuracy and response speed while reducing the frequency of manual intervention and operational complexity.

[0060] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A dipole antenna with electrically adjustable vibrator length, characterized in that, include: A fixing unit, comprising a fixing post and a clamping member, wherein one end of the fixing post is fixedly connected to the clamping member, and the fixing post is hollow inside; A dipole antenna, wherein the dipole antenna is connected to the fixed unit; The driving unit includes a stepper motor and a synchronization device. The stepper motor is located inside the fixed column and is fixedly connected to the fixed column. The synchronization device is engaged with the output end of the stepper motor and is fixedly connected to the dipole antenna. A waterproof unit includes a waterproof plate, which is located on the fixed column and is arranged parallel to the stepper motor; An adjustment unit is fixedly connected to the dipole antenna, and the adjustment unit is fixedly connected to the drive unit.

2. The dipole antenna with electrically adjustable oscillator length according to claim 1, characterized in that, The synchronization device includes a driving bevel gear and two driven bevel gears. The driving bevel gear is fixedly connected to the output end of the stepper motor, and the two driven bevel gears mesh on both sides of the driving bevel gear.

3. The dipole antenna with electrically adjustable oscillator length according to claim 2, characterized in that, The adjusting unit includes an adjusting rod, an adjusting nut, an angular contact bearing, and a deep groove ball bearing. The surface of the adjusting rod is axially threaded. The side of the adjusting rod closest to the driven bevel gear is fixedly connected to the inner ring of the angular contact bearing, and the adjusting rod is also fixedly connected to the driven bevel gear. The adjusting nut is sleeved on the adjusting rod, and the inner ring of the deep groove ball bearing is fixedly connected to the side of the adjusting rod away from the driven bevel gear.

4. The dipole antenna with electrically adjustable oscillator length according to claim 3, characterized in that, The adjusting nut includes a lead screw nut, a fixed flange, rolling elements, and a threaded channel. The lead screw nut is fixedly connected to the fixed flange. The threaded channel is provided on the lead screw nut, and the rolling elements are provided on the threaded channel. The fixed flange is fixedly connected to the dipole antenna.

5. The dipole antenna with electrically adjustable oscillator length according to claim 4, characterized in that, The waterproof membrane includes a waterproof shell, a waterproof baffle, a ventilated base plate, and a dustproof net. The waterproof shell is connected to the ventilated base plate. The waterproof baffle is installed inside the waterproof shell, and the cross-section of the waterproof baffle is Z-shaped. Several waterproof baffles are installed. The ventilated base plate and the dustproof net are arranged parallel to each other.

6. The dipole antenna with electrically adjustable oscillator length according to claim 5, characterized in that, The waterproof baffles are installed inside the waterproof shell in a staggered manner from left to right, with a certain gap left between adjacent waterproof baffles during the overlap.

7. The dipole antenna with electrically adjustable oscillator length according to claim 6, characterized in that, The waterproof membrane also includes a drain outlet, which is provided on the lower surface of the waterproof shell.

8. The dipole antenna with electrically adjustable oscillator length according to claim 7, characterized in that, The waterproof unit also includes an isolation plate and a waterproof sheet. A plurality of waterproof sheets are provided, and the plurality of waterproof sheets are fixedly connected to the stepper motor. The isolation plate is disposed between the stepper motor and the fixed column, and the isolation plate is fixedly connected through the waterproof sheets.

9. The dipole antenna with electrically adjustable oscillator length according to claim 8, characterized in that, It also includes a guide unit, which includes a slide groove and a slide rail. The fixed flange is provided with a slide rail, and the clamping member is provided with a slide groove.

10. The dipole antenna with electrically adjustable oscillator length according to claim 9, characterized in that, The waterproof sheet is coated with an alumina ceramic coating.

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