A portable variable-caliber detection antenna array

Abstract

The present invention discloses a portable variable-aperture detection antenna array, which belongs to the field of communication and radio detection technology, and solves the problems of heavy weight, inconvenient carrying, and low direction-finding accuracy of detection antennas in the prior art. The detection antenna array of the present invention includes a base, a high-end antenna array, a low-end antenna array, and an antenna selection switch; the high-end antenna array and the low-end antenna array are fixed to the base at the upper and lower parts respectively; the antenna selection switch is arranged in the base, and the antenna selection switch is electrically connected to the high-end antenna array and the low-end antenna array via a radio frequency cable; the low-end antenna array includes a retractable arm and a retractable vibrator; one end of the retractable arm is hinged to the antenna selection switch, and the retractable arm can be folded axially relative to the antenna selection switch to expand or fold the retractable arm; the retractable vibrator can be folded axially relative to the retractable arm to expand or fold the retractable vibrator. The present invention realizes the portability of the antenna while meeting the high-precision direction-finding requirements of different frequency bands.

Description

Technical Field

[0001] The invention belongs to the technical field of communication and radio detection, and in particular relates to a portable variable-caliber detection antenna array. Background Art

[0002] To meet the detection requirements of different frequency bands, existing detection antenna arrays typically use multiple layers of antennas with different apertures to form a multi-band antenna array, or deploy multiple aperture antenna arrays within a single system. These approaches often significantly increase the weight and size of the entire system, making it difficult to achieve the portability and lightweight requirements of detection equipment. Summary of the Invention

[0003] In view of the above analysis, the present invention aims to provide a portable variable-aperture detection antenna array. The detection antenna array of the present invention has a variable antenna array aperture and a variable vibrator length to solve the problems of heavy weight, inconvenience in carrying, and low direction-finding accuracy of the detection antenna.

[0004] The purpose of the present invention is mainly achieved through the following technical solutions:

[0005] A portable variable-caliber detection antenna array comprises a base, a high-end antenna array, a low-end antenna array and an antenna selection switch;

[0006] The high-end antenna array and the low-end antenna array are respectively fixed on the base at the upper and lower ends;

[0007] The antenna selection switch is arranged in the base, and the antenna selection switch is electrically connected to the high-end antenna array and the low-end antenna array through a radio frequency cable;

[0008] The low-end antenna array includes a retractable arm and a retractable vibrator;

[0009] One end of the retractable arm is hinged to the antenna selection switch, and the retractable arm can be folded axially relative to the antenna selection switch to expand or fold the retractable arm;

[0010] The telescopic vibrator is arranged at the other end of the telescopic support arm; the telescopic vibrator can be folded axially relative to the telescopic support arm so that the telescopic vibrator can be unfolded or folded.

[0011] Furthermore, the retractable arm includes an inner arm and an outer arm, and a quick locking mechanism is provided on the retractable arm;

[0012] The inner support arm and the outer support arm are both hollow structures, the inner support arm is arranged inside the outer support arm, and the inner support arm can slide relative to the outer support arm;

[0013] The quick locking mechanism is used to fix the relative positions of the inner support arm and the outer support arm so that the telescopic support arm can no longer be pulled out freely.

[0014] Furthermore, the joint portion of the outer support arm is provided with an external thread, and the inner surface of the joint portion is an open conical surface;

[0015] The quick locking mechanism includes a threaded sleeve and a first bushing; the internal thread of the threaded sleeve cooperates with the external thread of the joint; the first bushing is arranged in the conical surface, the small opening diameter of the conical surface is smaller than the outer diameter of the first bushing, and the large opening diameter of the conical surface is larger than the outer diameter of the first bushing.

[0016] Furthermore, the quick locking mechanism also includes a rubber sleeve, which is arranged on the outside of the threaded sleeve and fits tightly with the threaded sleeve; the outside of the rubber sleeve is provided with raised straight lines.

[0017] Furthermore, the low-end antenna array further comprises a cable take-up device, wherein the cable take-up device comprises a cavity, a core shaft, a winding drum and a winding pulley;

[0018] The core shaft, winding drum and winding pulley are all arranged in the cavity;

[0019] The core shaft is arranged at the center of the winding drum, and a coil spring is arranged inside the winding drum, and the coil spring provides a certain initial pre-tightening force for the winding drum;

[0020] The winding pulley is arranged at a position close to the telescopic support arm, and a gap for the radio frequency cable to pass through is formed between the winding pulley and the winding drum.

[0021] Furthermore, the core shaft is axially provided with a threading hole for the radio frequency cable to pass through. The radio frequency cable is wound on the bobbin and then passes through the threading hole of the core shaft and is connected to the rotor of the radio frequency rotary joint.

[0022] An RF cable is then extended from the stator of the RF rotary joint and connected to the low-end amplifier component.

[0023] Furthermore, the retractable vibrator includes an inner vibrator and an outer vibrator;

[0024] An O-ring and a second bushing are provided at the end of the inner vibrator; the second bushing is an open bushing, and the O-ring is provided in the second bushing to provide an outward expansion force for the second bushing, thereby squeezing the second bushing onto the inner wall of the outer vibrator.

[0025] Furthermore, a brass reed is provided on the inner wall of the outer vibrator, and the brass reed is attached to the outer wall of the inner vibrator.

[0026] Furthermore, the end of the external vibrator is connected to the cavity via a folding hinge;

[0027] The folding hinge includes a fixed joint, a rotating joint, a rotating shaft and a fixing mechanism;

[0028] The fixed joint is fixedly arranged on the cavity, the fixed joint and the rotary joint are connected via a rotating shaft, and the rotary joint can rotate around the rotating shaft relative to the fixed joint;

[0029] When the rotary joint rotates to be coaxial with the fixed joint, the fixing mechanism fixes the rotary joint and the fixed joint.

[0030] Furthermore, the fixing mechanism includes a compression spring and a pull sleeve;

[0031] The outer portion of the rotary joint is in a stepped shape, the compression spring is sleeved on the outer portion of the rotary joint, and one end of the compression spring abuts against the outer stepped surface of the rotary joint;

[0032] A coaxial first through hole and a second through hole are provided inside the pull sleeve, and the diameter of the first through hole is larger than the diameter of the second through hole, so that the interior of the pull sleeve is stepped; the pull sleeve is sleeved on the outside of the rotary joint, and the first through hole is sleeved on the outside of the compression spring; the other end of the compression spring abuts against the stepped surface inside the pull sleeve.

[0033] Compared with the prior art, the present invention can achieve at least one of the following technical effects:

[0034] 1) To achieve high-precision direction-finding requirements in different frequency bands and improve long-range reconnaissance capabilities, the present invention designs a detection antenna array with a variable antenna array aperture and variable oscillator length. This solves the technical difficulties of such antenna structures, such as bulky structure, inconvenient transportation, and poor direction-finding accuracy. It not only meets the detection needs of a wider frequency band, but also meets the requirements of portability and lightweight use, and can be carried by a single soldier and deployed in all terrains.

[0035] 2) The retractable arm and the retractable vibrator are connected by a folding hinge or a folding hinge. The present invention simplifies the folding method of the retractable arm and the retractable vibrator, reduces the steps of deployment and retraction, and greatly improves the rapid response capability and all-terrain deployment capability when used by a single soldier.

[0036] 3) The present invention features a cable take-up mechanism that allows the RF cable to be extended or shortened arbitrarily within the retractable arm. Furthermore, a winding pulley is incorporated into the cable take-up mechanism to guide and ensure the RF cable can be wound off and back onto the reel in an orderly manner.

[0037] 4) The quick locking mechanism includes a rubber sleeve with raised straight lines on the outside to facilitate gripping during operation.

[0038] Other features and advantages of the present invention will be described in the following description, and in part they may become apparent from the description or may be understood through implementation of the present invention. The purposes and other advantages of the present invention may be realized and obtained through the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings are only for purposes of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference numerals designate like components throughout the drawings.

[0040] Figure 1 This is a schematic diagram of a common double-layer detection antenna array;

[0041] Figure 2 This is a schematic diagram of the portable variable-aperture detection antenna array in its fully deployed form;

[0042] Figure 3 Schematic diagram of the arm quick locking mechanism locking the retractable arm;

[0043] Figure 4 It is a working diagram of the cable take-up device;

[0044] Figure 5 It is a working diagram of the stretchable vibrator;

[0045] Figure 6 It is a schematic diagram of the detection antenna array in small-aperture working mode;

[0046] Figure 7 This is a schematic diagram of the portable variable-aperture detection antenna array in its fully folded form.

[0047] Reference numerals:

[0048] 1. High-end antenna array; 2. Antenna selection switch; 3. Support arm; 3-1. Folding hinge; 3-2. Outer support arm; 3-3. Inner support arm; 4. Diopter; 4-1. Inner diopter; 4-2. Outer diopter; 4-3. O-ring; 4-4. Brass reed; 4-5. Rotating shaft; 4-6. Fixed joint; 4-7. Rotating joint; 4-8. Compression spring; 4-9. Pull sleeve; 4-10. Second bushing; 5. Quick locking mechanism; 5-1. Rubber sleeve; 5-2. Threaded sleeve; 5-3. First bushing; 6-1. RF cable; 6-2. Winding reel; 6-3. Winding pulley; 6-4. RF rotary joint; 7. Low-end amplification component 8. Cavity. DETAILED DESCRIPTION

[0049] A portable variable-aperture detection antenna array is further described in detail below in conjunction with specific embodiments. These embodiments are only used for comparison and explanation purposes, and the present invention is not limited to these embodiments.

[0050] Figure 1 The figure shows a common two-layer detection antenna array. It typically consists of a high-end antenna array 1 (for a higher frequency band) and a lower-frequency antenna array stacked together. Each layer of the antenna array corresponds to a detection frequency range and consists of five or more odd-numbered pairs of oscillators evenly distributed around the circumference. The aperture is fixed, resulting in poor direction-finding accuracy. An antenna selector switch 2 is typically located in the center of the bottom layer of the antenna array. Arms 3 are fixed around it, supporting oscillators 4 made of conductive metal, forming a single layer of the antenna array for receiving electromagnetic wave signals.

[0051] The present invention provides a portable variable-aperture detection antenna array, such as Figure 2-Figure 7 As shown, it includes a base, a high-end antenna array 1, a low-end antenna array and an antenna selection switch 2; the high-end antenna array 1 and the low-end antenna array are fixed on the base at the upper and lower parts respectively; the antenna selection switch 2 is arranged in the base, and the antenna selection switch 2 is electrically connected to the high-end antenna array 1 and the low-end antenna array through a radio frequency cable; the low-end antenna array includes a retractable arm and a retractable vibrator; one end of the retractable arm is hinged to the antenna selection switch 2, and the retractable arm can be folded axially relative to the antenna selection switch 2 to expand or fold the retractable arm; the retractable vibrator is arranged at the other end of the retractable arm; the retractable vibrator can be folded axially relative to the retractable arm to expand or fold the retractable vibrator.

[0052] This invention achieves miniaturization of this type of antenna through the folding and retracting of the retractable arm and array. While meeting the antenna's functional requirements, the antenna's dimensions and weight are reduced after folding, significantly reducing the operator's workload and improving the antenna's detection portability. This allows individual soldiers to carry the antenna and deploy it in all-terrain combat situations, significantly improving the system's rapid response capabilities. It also expands the antenna's operating frequency band and achieves higher direction-finding accuracy. The retractable oscillator expands the antenna array's operating frequency band, while the retractable arm allows for variable aperture, enabling higher direction-finding accuracy across a wider frequency band.

[0053] The retractable arms are provided with more than 5 odd groups, and the structures of the multiple retractable arms are exactly the same and are evenly distributed around the circumference of the base. For example, Figure 2 As shown, there are five groups of retractable arms. Each group of retractable arms is provided with a pair of retractable oscillators. For example, when the detection antenna array is fully extended, the retractable oscillators are perpendicular to the ground.

[0054] Specifically, the telescopic arm includes an inner arm 3-3 and an outer arm 3-2. The telescopic arm is provided with a quick locking mechanism 5, through which the inner arm 3-3 of the telescopic arm passes. Both the inner arm 3-3 and the outer arm 3-2 are hollow structures. The inner arm 3-3 is disposed within the outer arm 3-2 and can slide relative to the outer arm 3-2. The quick locking mechanism 5 is used to fix the relative position of the inner arm 3-3 and the outer arm 3-2, so that the telescopic arm can no longer be freely pulled out. Limiting joints are provided at both ends of the outer arm 3-2, so that the inner arm 3-3 cannot be completely separated from the outer arm 3-2 when pulled out.

[0055] like Figure 3 As described, the joint portion of the outer arm 3-2 is provided with an external thread (i.e., the outer arm 3-2 is a hollow thin-walled tube with an external threaded joint), and the inner surface of the joint portion is an open conical surface; the quick locking mechanism 5 includes a threaded sleeve 5-2 and a first bushing 5-3; the internal thread of the threaded sleeve 5-2 cooperates with the external thread of the joint portion, and the arm quick locking mechanism 5 can be moved left or right when rotated; the first bushing 5-3 is arranged in the conical surface, the small diameter of the conical surface is slightly smaller than the outer diameter of the first bushing 5-3, and the large diameter of the conical surface is slightly larger than the outer diameter of the first bushing 5-3. An annular protrusion is provided on the outside of the first bushing 5-3, and the annular protrusion is provided in the groove of the threaded sleeve 5-2. When the threaded sleeve 5-2 rotates and moves left and right, it drives the first bushing 5-3 to move left and right. Preferably, the first bushing 5-3 is an open bushing (i.e., a slit is provided in the axial direction of the first bushing 5-3). For example, when the quick locking mechanism 5 is rotated clockwise, it moves rightward, and the first bushing 5-3 becomes stuck between the tapered surface and the inner arm 3-3, locking the inner arm 3-3 and the outer arm 3-2 together. When the quick locking mechanism 5 is rotated counterclockwise, it moves leftward, and the gap between the tapered surface and the inner arm 3-3 becomes larger than the wall thickness of the first bushing 5-3, releasing the first bushing 5-3 and unlocking the inner arm 3-3 and the outer arm 3-2. For example, the first bushing 5-3 is an open nylon bushing.

[0056] Preferably, the quick locking mechanism 5 also includes a rubber sleeve 5-1, which is sleeved on the outside of the threaded sleeve 5-2 and fits tightly with the threaded sleeve 5-2; the outside of the rubber sleeve 5-1 is provided with raised straight lines to facilitate gripping during operation, and it fits tightly on the threaded sleeve 5-2. When operating, holding the rubber sleeve 5-1 and rotating it can simultaneously drive the threaded sleeve 5-2 to rotate.

[0057] However, at the same time, the RF cable 6-1 passed through the retractable arm itself is not retractable. As the antenna aperture changes, its length does not change accordingly. Therefore, in this embodiment, a necessary cable retractor is designed to enable the RF cable 6-1 to be arbitrarily lengthened or shortened in the retractable arm.

[0058] Specifically, such as Figure 4 As shown, the cable take-up device includes a cavity 8, a core shaft, a winding drum 6-2, and a winding pulley 6-3; the core shaft, winding drum 6-2, and winding pulley 6-3 are all disposed within the cavity 8. Cavity 8 is located at the end of a retractable arm. The core shaft is positioned at the center of the winding drum 6-2, and a coil spring is disposed within the winding drum 6-2 to provide a certain initial preload force for the winding drum 6-2. The winding pulley 6-3 is positioned near the retractable arm, and a gap is formed between the winding pulley 6-3 and the winding drum 6-2 for the RF cable 6-1 to pass through. After passing through the retractable arm 3, the RF cable 6-1 connected to the antenna selection switch 2 enters the cavity 8, then passes through the gap between the winding drum 6-2 and the winding pulley 6-3, and is wound on the winding drum 6-2. The coil spring inside the winding drum 6-2 provides a certain initial preload. When the retractable arm 3 is extended, the RF cable 6-1 is pulled out of the winding drum 6-2, and the coil spring gradually tightens and accumulates energy, providing a rewinding force when the retractable arm 3 is shortened. After releasing the quick locking mechanism 5, the elastic potential energy in the coil spring is released, and the RF cable 6-1 is wound back into the winding drum 6-2 in an orderly manner under the action of the coil spring. The winding pulley 6-3 plays a guiding role, ensuring that the RF cable 6-1 can be wound out of or back into the winding drum 6-2 in an orderly manner.

[0059] Then the RF cable 6-1 passes through the opening at the lower side of the winding drum 6-2 and into the center of the winding drum 6-2. The core shaft is axially provided with a threading hole for the RF cable 6-1 to pass through. After the RF cable 6-1 is wound on the winding drum 6-2, it passes through the threading hole of the core shaft and is connected to the rotor of the RF rotating joint 6-4; another RF cable is connected from the stator of the RF rotating joint 6-4 to the low-end amplifier component 7.

[0060] Preferably, the outer arm 3-2 and inner arm 3-3 are substantially equal in length, and the majority of the inner arm 3-3 can be retracted within the outer arm 3-2. The length of the RF cable 6-1 wound around the cable take-up is substantially equal to the length of the inner arm 3-3 of the retractable arm. When the inner arm 3-3 is fully retracted within the outer arm 3-2, the RF cable 6-1 also winds the inner arm 3-3 around the cable take-up.

[0061] like Figure 5As shown, the retractable vibrator includes an inner vibrator 4-1 and an outer vibrator 4-2. The inner vibrator 4-1 is inserted into one end of the outer vibrator 4-2, with an O-ring 4-3 and a second bushing 4-10 located at the end. The second bushing 4-10 is an open bushing, and the O-ring is positioned within the second bushing 4-10, providing an outward expansion force for the second bushing 4-10, pressing it against the inner wall of the outer vibrator 4-2. A connector is provided at the end of the inner vibrator 4-1, connecting the O-ring 4-3 and the second bushing 4-10 to the inner vibrator 4-1 via the connector. The O-ring 4-3 is deformed slightly between the inner and outer vibrators 4-1, creating a certain amount of friction as the inner vibrator 4-1 slides against the inner wall of the outer vibrator 4-2. In a vertical position, the inner vibrator 4-1 does not slide freely under the influence of gravity. The polytetrafluoroethylene bushing acts as a guide for the sliding movement. On the inner wall of the outer vibrator 4-2, there is a brass reed 4-4, which has a certain elastic force and fits on the outer wall of the inner vibrator 4-1, so that the electrical contact between the two vibrators is good. For example, the second bushing 4-10 is a polytetrafluoroethylene bushing.

[0062] The end of the external vibrator 4-2 is connected to the cavity 8 via a folding hinge. The folding hinge includes a fixed joint 4-6, a rotating joint 4-7, a rotating shaft 4-5, and a fixing mechanism. The fixed joint 4-6 is fixed to the cavity 8, and the fixed joint 4-6 and the rotating joint 4-7 are connected by the rotating shaft 4-5. The rotating joint 4-7 can rotate relative to the fixed joint 4-6 about the rotating shaft 4-5. When the rotating joint 4-7 rotates to be coaxial with the fixed joint 4-6, the fixing mechanism fixes the rotating joint 4-7 and the fixed joint 4-6. One end of the rotating joint 4-7 is hinged to the fixed joint 4-6, and the other end is fixedly connected to the external vibrator 4-2.

[0063] The fixing mechanism includes a compression spring 4-8 and a pull sleeve 4-9; the exterior of the rotary joint 4-7 is stepped, the compression spring 4-8 is sleeved on the exterior of the rotary joint 4-7, and one end of the compression spring 4-8 abuts against the stepped surface on the exterior of the rotary joint 4-7; a coaxial first through hole and a second through hole are provided inside the pull sleeve 4-9, and the diameter of the first through hole is larger than the diameter of the second through hole, so that the interior of the pull sleeve 4-9 is stepped; the pull sleeve 4-9 is sleeved on the exterior of the rotary joint 4-7, and the first through hole is sleeved on the exterior of the compression spring 4-8; the other end of the compression spring 4-8 abuts against the stepped surface inside the pull sleeve 4-9. When the vibrator rotates to be perpendicular to the ground, the fixed joint 4-6 and the rotating joint 4-7 are concentric, and the pull sleeve 4-9 simultaneously covers the fixed joint 4-6 and the rotating joint 4-7 under the action of the spring force, so that the relative positions of the two joints are fixed; when the telescopic vibrator needs to be folded down to be parallel to the ground, it is only necessary to pull up the pull sleeve 4-9, and the relative fixed relationship between the fixed joint 4-6 and the rotating joint 4-7 is released, and the telescopic vibrator can be folded down smoothly.

[0064] One end of the retractable arm is fixed on the antenna selection switch 2 and is designed with an upward folding hinge 3-1, and the other end is fixed with a cable take-up device and a low-end amplifier component 7, and a radio frequency cable 6-1 connecting the antenna selection switch 2 and the low-end amplifier component 7 is passed through it; the cable take-up device and the low-end amplifier component 7 are installed in the cavity 8 at one end of the retractable arm, and the retractable vibrator is installed on the upper and lower sides of the cavity 8.

[0065] Each set of retractable arms is staggered at a certain angle with the antenna units on the high-end antenna array 1. The high-end antenna array 1 has metal clips between the antenna units to fix the retractable arms, which facilitates the fixation of the retractable arms when the antenna is folded.

[0066] When in use, the portable variable-aperture detection antenna array is mounted on a portable tripod and operates over a wide frequency range. When retracted, it collapses into a cylindrical shape with an envelope diameter of ≤350mm, making it easy for soldiers to carry and deploy.

[0067] The entire detection antenna array is used as follows:

[0068] 1) To deploy: First, pull the telescopic arm and the retractable element out of the clip between the high-end antenna units. Slowly lower the telescopic arm to a horizontal position with the ground. Then, select a small or large aperture based on the operating environment. If the small aperture is selected, the telescopic arm remains stationary. If the large aperture is selected, first loosen the arm quick-lock mechanism 5. Then, forcefully pull the inner arm 3-3 of the telescopic arm out to the bottom. Then, tighten the quick-lock mechanism 5 to secure the inner arm 3-3. Then, raise the telescopic element from its horizontal position and, depending on the operating frequency band, decide whether to extend the inner element 4-1. Finally, connect the system cable to the connector below the antenna selector switch 2. After powering on, the antenna will begin operation.

[0069] 2) When withdrawing: First, turn off the system power, then remove the cable below the antenna selection switch 2 from the connector. Then, fold up the retractable vibrator, pull the pull sleeve on the retractable vibrator to the bottom in the direction of the vibrator's bulkhead, and release the folding hinge at the end of the vibrator. Then, the retractable vibrator can be laid down, with the vibrator axis horizontal to the ground. Next, loosen the quick locking mechanism 5 on the retractable arm. Under the action of the cable retractor, the inner arm 3-3 of the retractable arm retracts into the outer arm 3-2, and then tighten the quick locking mechanism 5. Finally, lift the retractable arm and snap it into the buckle between the antenna units of the high-end antenna array 1. This completes the withdrawal of the antenna array.

[0070] This invention boasts advanced technical principles and a simple structure. The antenna itself lacks any active power transmission device and is entirely manually operated, simplifying the structure and achieving a high degree of integration between the mechanical and electrical systems. This invention provides valuable guidance for antennas and other devices with similar structures. It has broad application prospects in communications, particularly in emergency communications and specialized communications requiring rapid response and high mobility, as well as in civilian and defense applications.

[0071] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A portable variable-aperture detection antenna array, characterized in that: The invention comprises a base, a high-end antenna array, a low-end antenna array and an antenna selection switch; the high-end antenna array and the low-end antenna array are fixed to the base at the upper and lower ends respectively; the antenna selection switch is arranged in the base and is electrically connected to the high-end antenna array and the low-end antenna array via a radio frequency cable; the low-end antenna array comprises a retractable arm and a retractable vibrator; one end of the retractable arm is hinged to the antenna selection switch, and the retractable arm can be folded axially relative to the antenna selection switch to expand or fold the retractable arm; the retractable vibrator is arranged at the other end of the retractable arm; the retractable vibrator can be folded axially relative to the retractable arm to expand or fold the retractable vibrator; The telescopic support arm includes an inner support arm and an outer support arm, and a quick locking mechanism is provided on the telescopic support arm; the joint part of the outer support arm is provided with an external thread, and the inner surface of the joint part is an open conical surface; the quick locking mechanism includes a threaded sleeve and a first bushing; the internal thread of the threaded sleeve cooperates with the external thread of the joint part; the first bushing is arranged in the conical surface, the small opening diameter of the conical surface is smaller than the outer diameter of the first bushing, and the large opening diameter of the conical surface is larger than the outer diameter of the first bushing; an annular protrusion is provided on the outside of the first bushing, and the annular protrusion is arranged in the groove of the threaded sleeve, and when the threaded sleeve rotates and moves left and right, it drives the first bushing to move left and right; when the quick locking mechanism moves to the right during clockwise rotation, the first bushing will be stuck between the conical surface and the inner support arm, so that the inner support arm and the outer arm are locked with each other; when the quick locking mechanism moves to the left during counterclockwise rotation, the gap between the conical surface and the inner support arm will be larger than the wall thickness of the first bushing, the first bushing will be released, and the inner support arm and the outer arm will be unlocked; The retractable vibrator includes an inner vibrator and an outer vibrator; an O-ring and a second bushing are provided at the end of the inner vibrator; the second bushing is an open bushing, and the O-ring is provided in the second bushing to provide an outward expansion force for the second bushing, squeezing the second bushing onto the inner wall of the outer vibrator; a brass reed is provided on the inner wall of the outer vibrator, and the brass reed is attached to the outer wall of the inner vibrator.

2. The portable variable aperture detection antenna array according to claim 1, characterized in that: The inner support arm and the outer support arm are both hollow structures, the inner support arm is arranged inside the outer support arm, and the inner support arm can slide relative to the outer support arm; The quick locking mechanism is used to fix the relative positions of the inner support arm and the outer support arm so that the telescopic support arm can no longer be pulled out freely.

3. The portable variable aperture detection antenna array according to claim 2, characterized in that: The quick locking mechanism further comprises a rubber sleeve, which is arranged on the outside of the threaded sleeve and fits tightly with the threaded sleeve; the outside of the rubber sleeve is provided with raised straight lines.

4. The portable variable aperture detection antenna array according to any one of claims 1 to 3, characterized in that: The low-end antenna array further includes a cable take-up device, wherein the cable take-up device includes a cavity, a core shaft, a winding drum and a winding pulley; The core shaft, winding drum and winding pulley are all arranged in the cavity; The core shaft is arranged at the center of the winding drum, and a coil spring is arranged inside the winding drum, and the coil spring provides a certain initial pre-tightening force for the winding drum; The winding pulley is arranged at a position close to the telescopic support arm, and a gap for the radio frequency cable to pass through is formed between the winding pulley and the winding drum.

5. The portable variable aperture detection antenna array according to claim 4, characterized in that: The core shaft is axially provided with a threading hole for the radio frequency cable to pass through. The radio frequency cable is wound on the winding drum and then passes through the threading hole of the core shaft and is connected to the rotor of the radio frequency rotary joint. An RF cable is then extended from the stator of the RF rotary joint and connected to the low-end amplifier component.

6. The portable variable aperture detection antenna array according to claim 5, characterized in that: The end of the external vibrator is connected to the cavity through a folding hinge; The folding hinge includes a fixed joint, a rotating joint, a rotating shaft and a fixing mechanism; The fixed joint is fixedly arranged on the cavity, the fixed joint and the rotary joint are connected via a rotating shaft, and the rotary joint can rotate around the rotating shaft relative to the fixed joint; When the rotary joint rotates to be coaxial with the fixed joint, the fixing mechanism fixes the rotary joint and the fixed joint.

7. The portable variable aperture detection antenna array according to claim 6, characterized in that: The fixing mechanism includes a compression spring and a pull sleeve; The outer portion of the rotary joint is in a stepped shape, the compression spring is sleeved on the outer portion of the rotary joint, and one end of the compression spring abuts against the outer stepped surface of the rotary joint; A coaxial first through hole and a second through hole are provided inside the pull sleeve, and the diameter of the first through hole is larger than the diameter of the second through hole, so that the interior of the pull sleeve is stepped; the pull sleeve is sleeved on the outside of the rotary joint, and the first through hole is sleeved on the outside of the compression spring; the other end of the compression spring abuts against the stepped surface inside the pull sleeve.

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