Low-frequency transmitting antenna supporting device for compact range test

Abstract

The invention relates to the technical field of compact range testing, and discloses a compact range testing low-frequency transmitting antenna supporting device which comprises a support, a lifting base and an antenna mounting seat, the lifting base is movably arranged on the support in the first direction, the first direction is consistent with the height direction of the support, and the antenna mounting seat is arranged on the lifting base. And the antenna mounting seat is arranged on the lifting base in an angle adjustable manner by taking a second direction as an axis, the second direction is perpendicular to the first direction, and a mounting position is arranged on the antenna mounting seat and is used for mounting a transmitting antenna. And lifting and polarization conversion of the transmitting antenna are realized.

Description

Technical Field

[0001] This invention relates to the field of compact field testing technology, and more particularly to a transmitting antenna support device for low-frequency compact field testing. Background Technology

[0002] In modern communication technology, antennas, as key components for signal transmission and reception, play a decisive role in the performance of the entire communication system. In antenna testing, the ideal testing environment is far-field conditions. However, in actual testing, obtaining the open space required to meet far-field conditions often faces numerous difficulties, especially for large-size antennas and low-frequency band testing. Compact field testing systems have emerged to address this need. Their core working principle is to use devices such as mirrors, horns, and arrays to convert the spherical wave emitted by the feed source into a plane wave, thereby simulating the far-field testing environment within a smaller space. In other words, a compact field system is a testing system that simulates far-field plane wave conditions within a limited space and is widely used in antenna measurement, radar cross section (RCS) testing, and other fields. In a compact field testing system, the transmitting antenna support device plays a crucial role, as it is key to ensuring the stability of the transmitting antenna during testing. In practical applications of low-frequency testing, traditional transmitting antenna support devices have revealed many problems. For example, traditional support devices have significant shortcomings in adaptability; they are often designed in a relatively fixed manner and cannot quickly adapt to different antenna testing requirements. Traditional support devices lack flexible adjustment mechanisms to cope with different testing environments and requirements, and cannot precisely adjust parameters such as the position and angle of the transmitting antenna according to actual conditions, thus limiting the comprehensiveness and accuracy of the test. To meet the high precision, high stability, and high adaptability requirements of modern communication technology for low-frequency antenna testing...

[0003] Therefore, there is an urgent need for a compact field testing low-frequency transmitting antenna support device to solve the above problems. Summary of the Invention

[0004] Based on the above, the purpose of this invention is to provide a support device for a low-frequency transmitting antenna used in a compact field test, which enables the raising, lowering, and polarization conversion of the transmitting antenna.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A support device for a transmitting antenna used in compact field testing of low frequencies includes:

[0007] support;

[0008] A lifting base is movable on the bracket along a first direction, the first direction being consistent with the height direction of the bracket;

[0009] An antenna mounting base is angularly adjustable on the lifting base with a second direction as its axis. The second direction is perpendicular to the first direction. The antenna mounting base is provided with a mounting position for mounting a transmitting antenna.

[0010] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, it also includes a tension rope. A drive wheel is provided on the top of the bracket. One end of the tension rope is connected to the lifting base, the tension rope passes around the drive wheel, and the other end is the force-applying end.

[0011] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, the bracket is further provided with a handwheel, and the force-applying end of the tension rope is wound around the handwheel.

[0012] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, the bracket includes a base and a support rod disposed on the base, the length direction of the support rod extending along the first direction, and the lifting base being rolled on the support rod along the first direction.

[0013] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, the lifting base includes a mounting frame and rollers disposed on the mounting frame. The mounting frame is sleeved over the support rod, and the rollers roll in contact with the support rod.

[0014] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in compact field testing, the antenna mounting base includes:

[0015] A fixed plate, the fixed plate including an intermediate body and a fixed ring located on the outer periphery of one end of the intermediate body, the fixed ring being connected to the lifting base, the intermediate body having a receiving groove with an opening facing the lifting base, and the bottom of the receiving groove having a through hole;

[0016] A rotating disk includes a connecting disk and a mounting post that protrudes from one side of the connecting disk along its axial direction. The connecting disk is rotatably accommodated in the receiving groove. The mounting post passes through the through hole, and the end of the mounting post facing away from the connecting disk is the mounting position.

[0017] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, it also includes a locking pin. The connecting plate has a plurality of locking holes around the mounting post ring. The locking pin is installed at the bottom of the receiving groove and can be inserted into or pulled out of one of the locking holes.

[0018] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, the connecting plate is connected to a plurality of externally threaded bearings arranged around the mounting column, and the bearing portion of the externally threaded bearing contacts the inner peripheral wall of the through hole.

[0019] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, the inner peripheral wall of the through hole extends inward to form an annular retaining edge, and the end of the bearing portion of the external threaded bearing near the screw abuts against the annular retaining edge.

[0020] As a preferred embodiment of a support device for a low-frequency transmitting antenna used in a compact field test, the bracket, the lifting base, and the antenna mounting base are all made of non-metallic materials.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention provides a support device for a transmitting antenna used in compact field testing of low frequencies. The support device includes a bracket, a lifting base, and an antenna mounting base. By mounting the antenna on the antenna mounting base, when the height of the transmitting antenna needs to be adjusted, the lifting base can be moved on the bracket along a first direction. When the angle of the transmitting antenna needs to be adjusted, the antenna mounting base can be adjusted relative to the lifting base along a second direction to achieve polarization conversion of the transmitting antenna. This device can adjust the height and angle of the transmitting antenna simultaneously or separately, effectively bringing great convenience and feasibility to the expansion of compact field testing capabilities to low-frequency measurements. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the low-frequency transmitting antenna support device for compact field testing provided in this embodiment of the invention. Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the structure of the low-frequency transmitting antenna support device for compact field testing provided in this embodiment of the invention. Figure 2 ;

[0026] Figure 3 This is a schematic diagram of the structure of the low-frequency transmitting antenna support device for compact field testing provided in this embodiment of the invention. Figure 3 ;

[0027] Figure 4 yes Figure 3 Enlarged view of section A;

[0028] Figure 5 This is a schematic diagram of the structure of the low-frequency transmitting antenna support device for compact field testing provided in this embodiment of the invention. Figure 4 ;

[0029] Figure 6 yes Figure 5 Enlarged view of section B;

[0030] Figure 7 The explosion of the lifting base provided in the embodiment of the present invention Figure 1 ;

[0031] Figure 8 The explosion of the lifting base provided in the embodiment of the present invention Figure 2 .

[0032] In the picture:

[0033] 1. Bracket; 11. Base; 12. Support rod; 13. Traveling wheel; 14. Reinforcing rod; 2. Lifting base; 21. Mounting frame; 211. Side frame plate; 2111. Inner side plate; 2112. Outer side plate; 22. Rolling wheel; 23. Connecting plate; 3. Antenna mounting base; 31. Fixing plate; 311. Intermediate body; 312. Fixing ring; 313. Annular flange; 32. Rotating plate; 321. Connecting plate; 322. Mounting column; 4. Tension rope; 5. Transmission wheel; 6. Hand crank; 7. Locking pin; 8. External thread bearing;

[0034] 10. Receiving groove; 20. Through hole;

[0035] 100. Transmitting antenna. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, 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 the present invention. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0040] like Figures 1 to 8 As shown, this embodiment provides a support device for a low-frequency transmitting antenna used for compact field testing, which supports a low-frequency transmitting antenna 100 for compact field testing. The transmitting antenna 100 uses two types of dual-ridge horn antennas with frequency bands of 0.3GHz to 2GHz and 0.4GHz to 4GHz, respectively, and their mounting interfaces are identical. The support device for the low-frequency transmitting antenna used for compact field testing includes a bracket 1, a lifting base 2, and an antenna mounting base 3. The lifting base 2 is movable on the bracket 1 along a first direction, wherein the first direction is consistent with the height direction of the bracket 1. The antenna mounting base 3 is adjustablely mounted on the lifting base 2 with a second direction as its axis, wherein the second direction is perpendicular to the first direction. The antenna mounting base 3 is provided with a mounting position for mounting the transmitting antenna 100. By mounting the antenna on the antenna mounting base 3, when the height of the transmitting antenna 100 needs to be adjusted, the lifting base 2 can be moved along the first direction on the bracket 1. When the angle of the transmitting antenna 100 needs to be adjusted, the antenna mounting base 3 can be adjusted along the second direction relative to the lifting base 2 to achieve the polarization conversion of the transmitting antenna 100. This allows for both simultaneous adjustment of the height and angle of the transmitting antenna 100 and separate adjustment of the height and angle of the transmitting antenna 100, effectively bringing great convenience and feasibility to the expansion of compact field to low-frequency measurement capabilities.

[0041] In this embodiment, the bracket 1, the lifting base 2, and the antenna mounting base 3 are all made of non-metallic materials, which can effectively reduce electromagnetic signal interference and reflection, avoid signal reflection and standing waves, reduce uncertainty, and ensure the accuracy and consistency of test results.

[0042] Specifically, such as Figure 1 and Figure 2 As shown, the bracket 1 includes a base 11 and a support rod 12 disposed on the base 11. The length direction of the support rod 12 extends along a first direction, that is, the length direction of the support rod 12 is consistent with the height direction of the bracket 1. The lifting base 2 is rolled on the support rod 12 along the first direction. The rolling arrangement facilitates the rapid and unobstructed lifting of the lifting base 2, resulting in smoother lifting and saving time and effort.

[0043] More specifically, the bottom of the base 11 is provided with a number of wheels 13, for example, four wheels 13, to facilitate the movement of the low-frequency transmitting antenna support device for the compact field test. Preferably, the wheels 13 are wheels 13 with locking mechanisms. Since wheels 13 with locking mechanisms are relatively mature existing technology, they will not be described in detail here.

[0044] Preferably, a reinforcing rod 14 is connected between the base 11 and the support rod 12, for example, three reinforcing rods 14 are connected to strengthen the support of the support rod 12 and enhance the stability and reliability of the entire compact field test low-frequency transmitting antenna support device, so as to prevent the transmitting antenna 100 from tipping over during lifting or polarization conversion.

[0045] In this embodiment, the lifting base 2 includes a mounting frame 21 and rolling wheels 22 mounted on the mounting frame 21. The mounting frame 21 is sleeved over the support rod 12, and the rolling wheels 22 roll in contact with the support rod 12. By applying force to the lifting base 2, the rolling wheels 22 roll along the outer wall of the support rod 12, thus achieving smooth lifting and lowering of the lifting base 2. The rolling wheels 22 can effectively save the power source for applying force and improve the smoothness of lifting and lowering of the lifting base 2.

[0046] For example, the support rod 12 is a square rod, that is, the support rod 12 has four sides, and the mounting frame 21 includes four side frame plates 211, each side frame plate 211 is equipped with one or more rolling wheels 22, and the rolling wheels 22 roll in contact with the sides of the support rod 12. Of course, in other embodiments, the support rod 12 can also be other shapes, such as round rods, depending on the actual needs.

[0047] Under the above structure, such as Figure 1 , Figure 7 and Figure 8As shown, the mounting frame 21 includes four side frame plates 211. Each side frame plate 211 includes an inner side plate 2111 and an outer side plate 2112. Each set of inner side plates 2111 and outer side plates 2112 is provided with corresponding mounting holes for rollers 22. The rollers 22 have a wheel body and mounting shafts located at both ends of the wheel body. The mounting shafts at both ends of each roller 22 are rotatably mounted between a set of inner side plates 2111 and outer side plates 2112. The wheel body is located in the corresponding mounting holes of the inner side plates 2111 and outer side plates 2112. Each set of inner side plates 2111 and outer side plates 2112 is connected by pins or bolts. That is, when assembling the lifting base 2, each roller 22 is placed in a corresponding mounting hole of the inner side plate 2111, then the outer side plate 2112 is covered, and the outer side plate 2112 and the inner side plate 2111 are fixed with pins or bolts to achieve the assembly of the mounting frame 21. The above structure is simple and easy to assemble and disassemble.

[0048] The lifting base 2 also includes a connecting plate 23, which is connected to one of the outer plates 2112 by pins or bolts. The connecting plate 23 is used to install the antenna mounting base 3.

[0049] Furthermore, such as Figure 1 As shown, the support device for the low-frequency transmitting antenna used in the compact field test also includes a tension rope 4. A transmission wheel 5 is installed at the top of the bracket 1, specifically at the top of the support rod 12. One end of the tension rope 4 is connected to the lifting base 2, and the tension rope 4 passes around the transmission wheel 5; the other end is the force-applying end. By applying force to the force-applying end, the lifting base 2 is pulled up and down along the support rod 12 in the first direction, thus raising and lowering the transmitting antenna 100. The transmission wheel 5 facilitates pulling the lifting base 2, saving power. Specifically, one end of the tension rope 4 is connected to the connecting plate 23. By manually pulling the other end, a pulling force is provided to the lifting base 2, raising it; or by releasing the other end of the tension rope 4, the lifting base 2 automatically descends under gravity. This method is time-saving, labor-saving, and easy to operate.

[0050] In this embodiment, a hand crank 6 is also provided on the bracket 1, specifically on the base 11, with the force-applying end of the tension rope 4 wound around it. By cranking the hand crank 6, the tension rope 4 is wound up, causing it to pull the lifting base 2 upwards, thus raising the transmitting antenna 100. Alternatively, by cranking the hand crank 6 in the opposite direction, the tension rope 4 is released, causing it to release the tension on the lifting base 2, which then slowly descends under gravity, thus lowering the transmitting antenna 100. With this structure, compared to electric drive, the lifting base 2, transmission wheel 5, and hand crank 6 can all be made of non-metallic materials, such as wood or rubber, effectively avoiding any impact on the test results.

[0051] Furthermore, such as Figures 3 to 6As shown, the antenna mounting base 3 includes a fixed plate 31 and a rotating plate 32. The fixed plate 31 includes an intermediate body 311 and a fixing ring 312 located on the outer periphery of one end of the intermediate body 311. That is, the outer periphery of one end of the intermediate body 311 extends outward to form the fixing ring 312. The fixing ring 312 is connected to the lifting base 2, specifically to the connecting plate 23 by means of pins or bolts. The intermediate body 311 has a receiving groove 10 with an opening facing the lifting base 2, and the bottom of the receiving groove 10 is provided with a through hole 20. The rotating plate 32 includes a connecting plate 321 and a mounting post 322 protruding from one side of the connecting plate 321 along the axial direction of the connecting plate 321. The connecting plate 321 is rotatably accommodated in the receiving groove 10. The mounting post 322 passes through the through hole 20. The end of the mounting post 322 away from the connecting plate 321 is the mounting position. The transmitting antenna 100 is connected to the mounting position of the mounting post 322, for example, by means of pins or bolts. The fixed disk 31 restricts the rotating disk 32 to a preset position, and the rotating disk 32 can rotate freely under force. By applying force to rotate the rotating disk 32, the rotating disk 32 rotates relative to the fixed disk 31, which can realize the rotation of the transmitting antenna 100 installed in the mounting position, thereby realizing the polarization conversion of the transmitting antenna 100.

[0052] The receiving groove 10 is preferably a circular groove, the connecting plate 321 is a circular plate, the through hole 20 is a circular hole, and the mounting column 322 is cylindrical. The structure has high operational reliability and facilitates the smooth and stable rotation of the rotating plate 32.

[0053] To improve the rotational stability and smoothness of the rotating disk 32, a plurality of externally threaded bearings 8 are connected to the connecting disk 321, which are arranged around the mounting post 322. Each externally threaded bearing 8 includes a bearing portion and a screw portion. The bearing portion of the externally threaded bearing 8 contacts the inner peripheral wall of the through hole 20. That is, the connecting disk 321 is provided with a plurality of threaded holes, which are arranged around the outer periphery of the mounting post 322. The screw portion of each externally threaded bearing 8 is threadedly connected to a threaded hole to be fixed to the connecting disk 321. The bearing portion of each externally threaded bearing 8 contacts the inner peripheral wall of the through hole 20, that is, the outer ring of the bearing portion contacts the inner peripheral wall of the through hole 20. When the rotating disk 32 rotates, under the relative rotation of the outer and inner rings of the externally threaded bearings 8, and under the relative rotation of the outer ring relative to the inner peripheral wall of the through hole 20, the rotation of the rotating disk 32 relative to the fixed disk 31 is stable and smooth, which also helps to save the applied force.

[0054] Preferably, the inner peripheral wall of the through hole 20 extends inward to form an annular retaining edge 313, and the end of the bearing portion of the external thread bearing 8 near the screw abuts against the annular retaining edge 313. That is, the annular retaining edge 313 provides a limiting function for the external thread bearing 8, so that the external thread bearing 8 is always in contact with the inner peripheral wall of the through hole 20, preventing the bearing portion of the external thread bearing 8 from partially or completely disengaging from the through hole 20 during the rotation of the rotating disk 32, which could cause structural misalignment and improve the operational reliability of the rotating disk 32.

[0055] Specifically, the support device for the low-frequency transmitting antenna used in the compact field test also includes a locking pin 7. A plurality of locking holes are arranged around the mounting post 322 on the connecting plate 321. The locking pin 7 is installed at the bottom of the receiving groove 10 and can be inserted into or removed from one of the locking holes. The locking pin 7 can be, for example, a knob plunger SXYKN spring-loaded self-locking stop pin. Of course, in other embodiments, the locking pin 7 can also be other structures, such as a bolt, which connects to a locking hole by screwing in the bolt to achieve relative fixation of the fixed plate 31 and the rotating plate 32. When there is no need to adjust the angle of the transmitting antenna 100, the locking pin 7 is locked in a locking hole, so that the relative positions of the fixed plate 31 and the rotating plate 32 are fixed. When it is necessary to rotate the rotating plate 32, the handle of the locking pin 7 is removed, so that the locking pin 7 is removed from the locking hole. Rotate the rotating plate 32 until the locking pin 7 is aligned with the next locking hole that needs to be aligned. Release the handle of the locking pin 7, and the locking pin 7 will automatically insert into the aligned locking hole, locking the fixed plate 31 and the rotating plate 32.

[0056] For example, the connecting disk 321 is provided with four locking holes, with a 90° interval between each two adjacent locking holes. That is, the rotating disk 32 can be rotated 90° each time to lock the fixed disk 31 and the rotating disk 32, thereby realizing the polarization conversion of the transmitting antenna 100.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A support device for a transmitting antenna used in compact field testing of low frequencies, characterized in that, include: support; A lifting base is movable on the bracket along a first direction, the first direction being consistent with the height direction of the bracket; An antenna mounting base is angularly adjustable on the lifting base with a second direction as its axis. The second direction is perpendicular to the first direction. The antenna mounting base is provided with a mounting position for mounting a transmitting antenna.

2. The support device for a low-frequency transmitting antenna for compact field testing according to claim 1, characterized in that, It also includes a tension rope, and a drive wheel is provided on the top of the bracket. One end of the tension rope is connected to the lifting base, the tension rope passes around the drive wheel, and the other end is the force-applying end.

3. The support device for a low-frequency transmitting antenna for compact field testing according to claim 2, characterized in that, The bracket is also equipped with a handwheel, and the tensioning end of the tension rope is wound around the handwheel.

4. The transmitting antenna support device for low-frequency compact field testing according to claim 1, characterized in that, The bracket includes a base and a support rod disposed on the base. The length direction of the support rod extends along the first direction, and the lifting base is rolled on the support rod along the first direction.

5. The support device for a low-frequency transmitting antenna for compact field testing according to claim 4, characterized in that, The lifting base includes a mounting frame and rolling wheels disposed on the mounting frame. The mounting frame is sleeved over the support rod, and the rolling wheels roll in contact with the support rod.

6. The transmitting antenna support device for low-frequency compact field testing according to claim 1, characterized in that, The antenna mounting base includes: A fixed plate, the fixed plate including an intermediate body and a fixed ring located on the outer periphery of one end of the intermediate body, the fixed ring being connected to the lifting base, the intermediate body having a receiving groove with an opening facing the lifting base, and the bottom of the receiving groove having a through hole; A rotating disk includes a connecting disk and a mounting post that protrudes from one side of the connecting disk along its axial direction. The connecting disk is rotatably accommodated in the receiving groove. The mounting post passes through the through hole, and the end of the mounting post facing away from the connecting disk is the mounting position.

7. The transmitting antenna support device for low-frequency compact field testing according to claim 6, characterized in that, It also includes a locking pin, and the connecting plate has a plurality of locking holes around the mounting post ring. The locking pin is installed at the bottom of the receiving groove and can be inserted into or pulled out of one of the locking holes.

8. The transmitting antenna support device for low-frequency compact field testing according to claim 6, characterized in that, The connecting disc is connected to a plurality of external threaded bearings that are arranged around the mounting column, and the bearing portion of the external threaded bearing contacts the inner peripheral wall of the through hole.

9. The transmitting antenna support device for low-frequency compact field testing according to claim 8, characterized in that, The inner peripheral wall of the through hole extends inward to form an annular retaining edge, and the end of the bearing portion of the external threaded bearing near the screw portion abuts against the annular retaining edge.

10. The transmitting antenna support device for low-frequency compact field testing according to any one of claims 1-9, characterized in that, The bracket, the lifting base, and the antenna mounting base are all made of non-metallic materials.

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