CN218917623U

CN218917623U - Transmitting device for far field test of antenna unit

Info

Publication number: CN218917623U
Application number: CN202223317191.3U
Authority: CN
Inventors: 余水林; 田菲; 邹鹏飞; 沈小川; 武云龙; 陈茹; 罗前春
Original assignee: Wuhan Binhu Electronic Co ltd
Current assignee: Wuhan Binhu Electronic Co ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-04-25
Anticipated expiration: 2032-12-09

Abstract

The utility model relates to the field of electronic equipment testing, in particular to a transmitting device for radar antenna unit far field testing. The sliding rail fixing frame is fixedly arranged on an iron tower, sliding rails are arranged on the left side and the right side of the sliding rail fixing frame, the sliding rails are arranged on the two sides to form a V shape, the sliding rail fixing frame is contacted with the mounting sliding rails through rollers on the two sides, and the pulley flat plate is fixedly connected with the rollers on the two sides. The utility model can realize continuous lifting of the height of the transmitting horn, realize rapid adjustment and reliable fixation of the horn pointing, improve test conditions and improve test efficiency.

Description

Transmitting device for far field test of antenna unit

Technical Field

The utility model relates to the field of electronic equipment testing, in particular to a transmitting device for radar antenna unit far field testing.

Background

With the continuous improvement of the radar technology level, the importance and difficulty of the antenna unit test work are more and more prominent. Although the antenna unit near field test can calculate the performance of the antenna unit through a mathematical method on the basis of completing the antenna unit test, the antenna unit near field test is difficult to truly simulate the actual use environment of the antenna unit, so that even if the performance of an ideal antenna unit is calculated, the antenna unit in actual use still needs to be checked through the antenna unit far field test. The far field test of the antenna unit adopts a special test field, and can directly test the far field data of the antenna unit to obtain the real, visual and credible electrical performance indexes such as antenna gain, directional diagram, polarization parameters and the like of the antenna unit. The transmitting device for far-field testing of an antenna element is a transmitting source of the test signal, which is of self-evident importance.

The far field test of the antenna unit is mainly to irradiate the antenna unit by plane waves with known characteristic parameters to obtain the receiving characteristic parameters of the antenna unit, and then to obtain the propagation characteristic parameters of the antenna unit by utilizing the reciprocity principle of the antenna unit. When the wave front array surface of electromagnetic waves emitted by the emitting device is expanded to a certain extent, the antenna unit to be tested can be considered to receive the irradiation of plane waves. Such a conventional stationary type transmitting device has the following problems: 1) Different antenna units to be tested have to adjust the erection height of the launching device to meet the test requirement because of the erection position and the array plane caliber of the antenna units to be tested, so that the problems of long working time, high labor intensity and low working efficiency exist because the testers can erect the launching device again and again; 2) The horn of the transmitting device cannot be quickly adjusted to be pointed, so that the device is very inconvenient to operate once being adjusted, cannot be reliably fixed after being adjusted, and gusts with certain strength can cause the pointed direction to be changed to influence the testing precision, and can cause the fact that normal testing cannot be completed when serious.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a transmitting device for far-field testing of an antenna unit. According to the transmitting device disclosed by the utility model, the continuous lifting of the height of the transmitting horn can be realized according to the requirement of far-field test of the antenna unit, the rapid adjustment and reliable fixing of the horn pointing direction can be realized, the test condition can be greatly improved, the test efficiency can be greatly improved, the reliability of the test result can be improved, and the use stability and convenience of the transmitting device are very high.

The technical scheme of the utility model is as follows: the launching device for far-field test of the antenna unit comprises an iron tower, a winch, a steel wire rope, a first fixed pulley, a second fixed pulley, a loudspeaker mounting rack and a loudspeaker, wherein the iron tower is fixedly erected on a mountain top or a building, the winch is fixedly arranged at the lower part of a framework of the iron tower, one end of the steel wire rope is fixedly arranged on a winch wheel of the winch, and the other end of the steel wire rope sequentially passes through the first fixed pulley and the second fixed pulley and is then fixed on the pulley, and the pulley is driven to lift along the vertical height direction by controlling the winch; the fixed pulley I is positioned at the top of the iron tower, and the fixed pulley II is positioned at the corner of the iron tower; the horn mounting frame is fixedly arranged on the pulley, and the horn is arranged on the horn mounting frame; the method is characterized in that: the pulley comprises a sliding rail fixing frame, sliding rails, rollers and a pulley flat plate; the slide rail mount fixed mounting is on the iron tower, and the left and right sides installation slide rail of slide rail mount, and both sides installation slide rail form the V font, and the slide rail mount passes through the gyro wheel and the installation slide rail contact of both sides, and the coaster flat board is with the gyro wheel fixed connection of both sides.

The beneficial effects of the utility model are as follows: the height and the direction of the transmitting antenna horn can be quickly adjusted, reliable fixing can be realized, the labor intensity of testers is reduced, the testing efficiency is greatly improved, the reliability of a testing result is improved, the stability and the convenience of testing are very high, and the development of a high-performance radar antenna unit can be effectively promoted.

Drawings

Fig. 1 is a front view of a transmitting device.

Fig. 2 is a front view of the sled with the launcher a oriented.

FIG. 3 is a sectional view of sled B-B.

Fig. 4 is an enlarged view of a portion of the sled.

Fig. 5 is a front view of the horn mount.

Fig. 6 horn mount C is a view.

Fig. 7 horn mount D is a view.

Fig. 8 is a wiring diagram of a transmitting device.

Reference numerals illustrate: iron tower 1, hoist 2, wire rope 3, fixed pulley one 4, fixed pulley two 5, pulley 6, horn mount 7, horn 8, working room 9, mounting plate 10, upper bracket 11, first shaft 12, first self-locking nut 13, upper post 14, second self-locking nut 15, back frame 16, middle bracket 17, second shaft 18, third self-locking nut 19, middle post 20, fourth self-locking nut 21, butterfly nut 22, lower bracket 23, third shaft 24, fifth self-locking nut 25, lower post 26, sixth self-locking nut 27, slide rail mount 28, slide rail 29, first seal ring 30, roller 31, rolling bearing 32, roller shaft 33, second seal ring 34, end cap 35, sleeve 36, sixth self-locking nut 37, pulley plate 38, seventh self-locking nut 39, signal source 40, first cable 41, excitation module 42, second cable 43, first N-type connector 44, third cable 45, second N-type connector 46, fourth cable 47.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 8, the transmitting device for far-field test of the antenna unit of the utility model comprises an iron tower 1, a winch 2, a steel wire rope 3, a fixed pulley I4, a fixed pulley II 5, a pulley 6, a horn mounting bracket 7 and a horn 8. The height of the iron tower 1 is about 50 meters, and the height can be selected according to actual conditions. The iron tower 1 is fixedly erected on a mountain top or a high building with high altitude and no shielding. The winch 2 is fixedly arranged at the lower part of the framework of the iron tower 1, one end of the steel wire rope 3 is fixedly arranged on the winch wheel of the winch 2, the other end of the steel wire rope 3 sequentially passes through the fixed pulley I4 and the fixed pulley II 5 and then is fixedly arranged on the pulley 6, and the pulley 6 is driven to lift along the vertical height direction by controlling the winch 2. The fixed pulley I4 is positioned at the top of the iron tower 1, and the fixed pulley II 5 is positioned at the corner of the iron tower 1. The loudspeaker mounting frame 7 is fixedly mounted on the pulley 6, and the loudspeaker 8 is mounted on the loudspeaker mounting frame 7. The iron tower 1 framework is grounded and is used for preventing the whole transmitting device from being damaged by lightning strike. The whole outer surface of the iron tower 1 is coated with an ageing-resistant and corrosion-resistant coating, so that the iron tower 1 can be ensured to have long service life.

As shown in fig. 2 to 4, the pulley 6 of the present utility model includes a rail holder 28, a rail 29, a roller 31, a pulley plate 38, and a self-locking nut seven 39. The slide rail mount 28 fixed mounting is on iron tower 1, and slide rail 29 is installed to the left and right sides of slide rail mount 28, and both sides installation slide rail 29 forms the V font, and slide rail mount 28 passes through the gyro wheel 31 of both sides and contacts with installation slide rail 29, and the coaster flat board 38 passes through self-locking nut seven 39 and gyro wheel 31 fixed connection of both sides to make gyro wheel 31 roll from top to bottom not to block, and steady smooth and easy do not take place the offset swing.

As shown in fig. 4, the roller 31 of the present utility model comprises a first seal ring 30, a rolling bearing 32, a roller shaft 33, a second seal ring 34, an end cover 35, a shaft sleeve 36 and a self-locking nut six 37, wherein the first seal ring 30 is arranged in an annular groove of the roller 31. The second seal ring 34 is installed in the end cover 35 to compress the outer ring of the rolling bearing 32 in the roller 31. After the thinner end of the roller shaft 33 passes through the inner hole of the rolling bearing 32, the inner ring of the rolling bearing 32 is sequentially pressed by the shaft sleeve 36 and the self-locking nut 37.

The trolley 6 of the present utility model, while achieving a compact function and structure, reserves sufficient maintenance space and provides excellent assemblability and maintainability. The roller 31 of the pulley moves up and down on the sliding rail 29 through the inner rolling bearing 32, and the V-shaped structure of the sliding rail 29 can effectively reduce the shaking of the pulley flat plate 38 caused by gusts, and has strong wind-gusting resistance. The trolley 6 provides a platform for the horn mount 7 and horn 8 to move up and down smoothly and smoothly. The structure capable of moving up and down can conveniently adjust the erection height of the horn 8 to meet the requirement of far field test of the antenna.

As shown in fig. 5 to 7, the horn mounting bracket 7 of the present utility model includes a mounting plate 10, an upper support 11, a first rotation shaft 12, a first self-locking nut 13, an upper support 14, a second self-locking nut 15, a back frame 16, a middle support 17, a second rotation shaft 18, a third self-locking nut 19, a middle support 20, a fourth self-locking nut 21, a butterfly nut 22, a lower support 23, a third rotation shaft 24, a fifth self-locking nut 25, a lower support 26, and a sixth self-locking nut 27. The horn 8 is fixed to the mounting plate 10 by screws. The upper support 11 is installed on the upper portion of the installation plate 10, the hinge holes of the upper support 11 and the hinge holes of the upper support 14 are aligned, the first rotating shaft 12 is installed, the first self-locking nut 13 is used for fixing, and the second self-locking nut 15 is used for installing and fixing the upper support 14 on the back frame 16. The middle support 17 is arranged in the middle of the mounting plate 10, the second rotating shaft 18 is arranged after the hinge holes of the middle support 17 and the middle support 20 are aligned, the middle support 20 is fixed by the third self-locking nut 19, and the middle support 20 is arranged and fixed on the back frame 16 by the fourth self-locking nut 21 and the wing nut 22. The lower part of the mounting plate 10 is provided with a lower support 23, then the hinge holes of the lower support 23 and a lower support 26 are aligned, then the rotating shaft III 24 is arranged, the lower support 26 is fixed by a self-locking nut V25, and then the lower support 26 is fixed on the back frame 16 by a self-locking nut V27. The back frame 16 is secured to the carrier plate 38. The upper support 11, the middle support 17 and the lower support 23 form a triangular structure, so that the length of the middle support 20 is changed by adjusting the self-locking nut IV 21 and the butterfly nut 22, fine adjustment of the direction of the horn 8 is realized, and the test precision is ensured.

As shown in fig. 5 to 7, the horn fixing and direction adjusting method: the horn 8 is fixed on the mounting plate 10 by bolts, the upper support 11 and the lower support 23 are arranged up and down on the left side of the mounting plate 10, the middle support 17 is arranged in the middle of the right side of the mounting plate 10, and the horn is distributed in a triangle shape; when the horn 8 is in directional adjustment, the first self-locking nut 13, the third self-locking nut 19, the fourth self-locking nut 21 and the fifth self-locking nut 25 are loosened, the horn on the mounting plate 10 can be in directional adjustment along the rotation axis determined by the first rotating shaft 12 and the second rotating shaft 18 by adjusting the length of the middle support column 20 penetrating through the mounting plate 10, electromagnetic waves emitted by the horn are ensured to be aligned with the radar antenna to be detected, the horn 8 is fixed by the fourth self-locking nut 21 and the fourth butterfly nut 22 after being adjusted, and the first self-locking nut 13, the third self-locking nut 19 and the fifth self-locking nut 25 are fixed. This way of fixing and adjusting the horn 8 is extremely convenient to operate, reducing the operating time of the test personnel. The self-locking nut is used for fixing the horn 8, so that the mounting angle posture of the horn 8 is unchanged, the influence of gust on the horn 8 can be effectively resisted, the testing precision is improved, and the stability is good.

As shown in fig. 8, the iron tower 1 may further comprise a working room 9 (the broken frame part is equipment in the working room in the drawing), the working room is arranged at the bottom of the iron tower 1, and the working room 9 is provided with electronic devices, cables and N-type connectors. The electrical connection of the present utility model includes a signal source 40, a first cable 41, an excitation module 42, a second cable 43, a first N-type connector 44, a third cable 45, a second N-type connector 46, and a fourth cable 47. The signal source 40 is installed in the working room 9 of the part, the excitation module 42 is connected through the cable one 41, and the excitation module 42 is connected with the loudspeaker 8 after being connected with the cable two 43, the N-type connector one 44, the cable three 45, the N-type connector two 46 and the cable four 47 in sequence.

The workstation 9 is provided with a table on which a signal source 40 and an excitation module 42 are mounted. During far field testing of the antenna unit, a tester can change the signal emitted by the loudspeaker 8 by changing the characteristic parameter of the signal input by the signal source 40, so as to be used for far field testing of the antenna unit.

The operation process of the transmitting device of the utility model is as follows: according to the requirement of the far field test of the antenna unit, a tester changes the signal emitted by the loudspeaker by changing the characteristic parameter of the input signal of the signal source, after the emitted signal is diffused for a certain distance, a plane wave is approximately formed, the radar antenna unit to be tested is irradiated, the receiving characteristic parameter of the antenna unit is obtained at the antenna unit end, and then the propagation characteristic parameter of the antenna unit is obtained by utilizing the reciprocity principle of the antenna unit, so that the far field test of the antenna unit is completed.

When the transmitting device is used, the characteristic parameters of the signals of the signal source are adjusted according to the test requirements, and the antenna unit end can acquire the real, visual and credible electrical performance indexes such as antenna gain, directional diagram, polarization parameters and the like of the antenna unit after data acquisition is completed. Aiming at different radar antenna units, the transmitting device can quickly adjust and fix the height and the direction of the transmitting horn to meet the test requirement, the labor intensity of a tester is reduced, the test efficiency is improved, the reliability of a test result is improved, and the stability and the convenience of the transmitting device are very high, so that the working efficiency of the tester is improved by more than 75%.

Claims

1. The launching device for far-field test of the antenna unit comprises an iron tower, a winch, a steel wire rope, a first fixed pulley, a second fixed pulley, a loudspeaker mounting rack and a loudspeaker, wherein the iron tower is fixedly erected on a mountain top or a building, the winch is fixedly arranged at the lower part of a framework of the iron tower, one end of the steel wire rope is fixedly arranged on a winch wheel of the winch, and the other end of the steel wire rope sequentially passes through the first fixed pulley and the second fixed pulley and is then fixed on the pulley, and the pulley is driven to lift along the vertical height direction by controlling the winch; the fixed pulley I is positioned at the top of the iron tower, and the fixed pulley II is positioned at the corner of the iron tower; the horn mounting frame is fixedly arranged on the pulley, and the horn is arranged on the horn mounting frame; the method is characterized in that: the pulley comprises a sliding rail fixing frame, sliding rails, rollers and a pulley flat plate; the slide rail mount fixed mounting is on the iron tower, and the left and right sides installation slide rail of slide rail mount, and both sides installation slide rail form the V font, and the slide rail mount passes through the gyro wheel and the installation slide rail contact of both sides, and the coaster flat board is with the gyro wheel fixed connection of both sides.

2. A transmitting device for far field testing of an antenna element according to claim 1, characterized in that: the loudspeaker mounting rack comprises a mounting plate, an upper support, a back frame, a middle support and a lower support; the upper part of the mounting plate is provided with an upper support, the middle part of the mounting plate is provided with a middle support, and the lower part of the mounting plate is provided with a lower support; the upper support, the middle support and the lower support form a triangular structure, and the angle between the mounting plate and the back frame can be changed by adjusting the lengths of the upper support, the middle support and the lower support; the loudspeaker is fixed on the mounting plate; the back frame is fixed on the pulley flat plate.

3. A transmitting device for far field testing of an antenna element according to claim 1, characterized in that: the roller comprises a first sealing ring, a rolling bearing, a roller shaft, a second sealing ring, an end cover, a shaft sleeve and a self-locking nut, wherein the first sealing ring is arranged in an annular groove of the roller; one end of the roller shaft penetrates through an inner hole of the rolling bearing, and then the shaft sleeve and the self-locking nut are sequentially used for tightly pressing the inner ring of the rolling bearing.

4. A transmitting device for far field testing of an antenna element according to claim 2, characterized in that: the hinge holes of the upper support and the upper support post are aligned and then are provided with a first rotating shaft which is fixed by a first self-locking nut; the upper support post is fixed on the back frame by a self-locking nut II.

5. A transmitting device for far field testing of an antenna element according to claim 2, characterized in that: the middle support and the middle support are aligned with the hinge holes of the middle support, the second rotating shaft is arranged and fixed by the third self-locking nut, and the middle support is arranged and fixed on the back frame by the fourth self-locking nut and the butterfly nut.

6. A transmitting device for far field testing of an antenna element according to claim 2, characterized in that: the hinge holes of the lower support and the lower support are aligned, then the upper rotating shaft III is arranged, the lower support is fixed by the self-locking nut V, and the lower support is fixed on the back frame by the self-locking nut V.

7. A transmitting device for far field testing of an antenna element according to claim 1, characterized in that: still include the workshop, the workshop sets up in the iron tower bottom.

8. A transmitting device for far field testing of an antenna element according to claim 1, characterized in that: the height of the iron tower is 50 meters.