Feed source test tool

Abstract

The utility model provides a feed source testing tool, which relates to the technical field of feed source testing, and comprises an adjusting support which is connected above a base through a stand column and is used for adjusting the spatial position of a feed source product; a feed source product is installed on the rotating support, the rotating support is installed on the adjusting support, and the angle position of the feed source product is adjusted through the rotating support; and the wave absorbing body is installed on the rotating support, and the wave absorbing body covers the periphery of the feed source product. According to the technical scheme of the utility model, the wave absorbing bodies are arranged on the periphery of the feed source product, and due to the existence of the wave absorbing bodies, electromagnetic wave sources and reflection of non-feed source targets can be absorbed, so that adverse effects of interference electromagnetic waves on a feed source test process are greatly weakened or even eliminated.

Description

Technical Field

[0001] The utility model relates to the technical field of feed source testing, in particular to a feed source testing tool. Background Art

[0002] The primary radiator (source horn or vibrator) of the main and secondary reflectors of the antenna feed source excitation surface is referred to as the feed source. It is an important device that determines the electrical characteristics and frequency band of the antenna. Its function is to radiate the RF power from the feed line to the reflector or lens in the form of electromagnetic waves, so that it can produce a suitable field distribution on the aperture to form the required sharp beam or shaped beam; at the same time, the power leaking out from the edge of the reflector or lens is minimized to achieve the highest possible gain.

[0003] The feed electrical test platform is mainly used to test the radiation characteristics (gain, directivity, axial ratio, etc.) of the feed and measure the electrical performance of the product. This platform is installed in the far-field microwave darkroom of the institute, and the platform interface is compatible with the test turntable. After the platform is designed and debugged, it can meet the purpose of high efficiency of electrical performance testing of batch products and effectively reduce labor resources.

[0004] The feed source test platform in the prior art, such as the Chinese patent CN218865945U published on April 14, 2023, discloses a test antenna feed source carrying platform, which realizes various posture adjustments required for the feed source product experiment through a horizontal slide, a longitudinal slide and a rotating table. However, this type of prior art does not take into account the problem of electromagnetic radiation interference with electromagnetic waves during the feed source test process. Utility Model Content

[0005] The utility model aims to provide a feed source test fixture, which can absorb or significantly reduce the electromagnetic wave interference problem of non-feed source targets.

[0006] The utility model provides a feed source test tool, comprising: an adjustment support, the adjustment support is connected to the top of a base through a column, and the spatial position of a feed source product is adjusted through the adjustment support; a rotating support, the feed source product is mounted on the rotating support, the rotating support is mounted on the adjustment support, and the angular position of the feed source product is adjusted through the rotating support; and an absorber, the absorber is mounted on the rotating support, and the absorber covers the periphery of the feed source product.

[0007] Furthermore, the absorber comprises a bottom plate, and a wedge-shaped absorber is arranged on the bottom plate.

[0008] Furthermore, the adjustment support includes a horizontal adjustment platform, and the horizontal adjustment platform includes two adjustment plates arranged up and down, and the two adjustment plates are connected by at least three adjustment bolts.

[0009] Furthermore, the adjustment support also includes left and right adjustment platforms, which include a saddle and a middle slide seat. The saddle is fixedly connected to the horizontal adjustment platform, and the middle slide seat is slidably connected to the saddle along the left and right directions. The saddle is provided with a first adjustment rod connected to the middle slide seat.

[0010] Furthermore, the adjustment support also includes a front-rear adjustment platform, the front-rear adjustment platform includes an upper slide seat, the upper slide seat is slidably connected to the middle slide seat along the front-rear direction, and the middle slide seat is provided with a second adjustment rod connected to the upper slide seat.

[0011] Furthermore, the rotating support includes a mounting seat and a rotating platform, the mounting seat is fixedly connected to the adjusting support, and the rotating platform is rotatably connected to the mounting seat.

[0012] Furthermore, the outer side of the rotating table is a worm gear structure, and a worm structure is rotatably provided on the mounting seat and meshes with the worm gear structure on the outer side of the rotating table; a knob is provided at the outer end of the worm structure.

[0013] Furthermore, a dial is provided on the rear side of the mounting seat, and a pointer is connected to the rear end of the rotating platform extending out of the mounting seat.

[0014] Furthermore, a placement platform is provided on the side of the mounting seat, and the placement platform is used to place the laser level.

[0015] Furthermore, a front end of the rotating platform away from the mounting seat is connected to a fiberglass reinforced plastic dielectric ring, and the feed product is mounted on the fiberglass reinforced plastic dielectric ring.

[0016] The technical solution of the utility model is to set an absorber on the periphery of the feed product. Due to the existence of the absorber, the electromagnetic wave source and reflection of the non-feed target will be absorbed or attenuated, thereby greatly reducing or even eliminating the adverse effects of interfering electromagnetic waves on the feed test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the front side of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the rear side of the utility model;

[0020] Figure 3 For this utility model Figure 2 A magnified image of point A;

[0021] Figure 4 It is a side view of the utility model;

[0022] Figure 5 For this utility model Figure 4 AA section view;

[0023] Figure 6 For this utility model Figure 5 A magnified image of point A;

[0024] Description of reference numerals:

[0025] 1-base, 2-column; 3-adjustable support;

[0026] 4-horizontal adjustment table, 401-adjustment plate, 402-adjustment bolt;

[0027] 5-left and right adjustment platform, 501-saddle, 502-middle slide seat, 503-first adjustment rod;

[0028] 6-front and rear adjustment platform, 601-upper slide seat, 602-second adjustment rod;

[0029] 7-rotating support, 701-mounting seat, 702-rotating table, 703-worm gear structure, 704-worm structure, 705-knob, 706-dial, 707-pointer;

[0030] 8- absorber, 801- wedge-shaped absorber, 802- bottom plate;

[0031] 9-Placement table, 901-Laser level;

[0032] 10-Fiberglass dielectric ring. DETAILED DESCRIPTION

[0033] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Example 1

[0037] like Figure 1-Figure 6 As shown, the utility model provides a feed test fixture, including: an adjustment support 3, the adjustment support 3 is connected to the top of the base 1 through a column 2, and the spatial position of the feed product is adjusted by adjusting the support 3; a rotating support 7, the feed product is installed on the rotating support 7, the rotating support 7 is installed on the adjustment support 3, and the angular position of the feed product is adjusted by rotating the support 7; an absorber 8, the absorber 8 is installed on the rotating support 7, and the absorber 8 covers the periphery of the feed product.

[0038] Specifically, the adjustment support 3 mainly includes adjustment structures in three dimensions: horizontal adjustment, front-to-back adjustment, and left-to-right adjustment, so as to adjust the three-dimensional position of the rotating support 7 and the feed product in space. The rotating support 7 is mainly used to fix and rotate the feed product and adjust the angle of the feed product.

[0039] The absorber 8 is a HALF structure absorbing material. Since the absorber 8 covers the periphery of the feed product, the interfering electromagnetic waves in the space outside the feed product are absorbed by the absorber 8. Therefore, the radiation of the feed product to the reflecting surface or lens is clearer, and the test process is less adversely affected by the interfering electromagnetic waves.

[0040] Example 2

[0041] like Figure 1 , Figure 4 As shown, the absorber 8 includes a bottom plate 802 , on which a wedge-shaped absorber 801 is arranged.

[0042] Specifically, the absorber 8 mainly includes a base plate 802, and a wedge-shaped absorber 801 (or absorber angle cone) made of polyurethane material is bonded to the base plate 802. As the frequency decreases (the wavelength increases), the length of the absorber also increases. Generally speaking, the structure of the absorber angle cone is composed of a series of metal cones and insulating materials. The heights and spacings of these metal cones are arranged according to a certain rule, which can guide electromagnetic waves to the surface of the metal cones, thereby converting electromagnetic waves into heat energy or other forms of energy. The application of absorber angle cones is very wide, mainly used in electromagnetic wave shielding, electromagnetic wave absorption and electromagnetic wave stealth. In the military field, absorber angle cones are widely used in radar stealth technology, which can effectively reduce the reflection of radar waves, thereby achieving the purpose of stealth. In the civilian field, absorber angle cones are also used in electromagnetic wave shielding and absorption materials, which can effectively reduce the impact of electromagnetic waves on the human body and equipment. This wedge-shaped absorbing structure and shape is an existing technology, for example [1] Yi Mingdi, Wang Bing, Wang Di. Analysis of the absorbing mechanism of absorbing materials in microwave darkroom design [J]. Information Communication, 2016(08):30-31. Existing technology products such as PY-100 type pyramidal series absorbing materials, etc., will not be repeated in detail about their absorbing principles.

[0043] Example 3

[0044] like Figure 1-Figure 3 As shown, the adjustment support 3 includes a horizontal adjustment platform 4 , and the horizontal adjustment platform 4 includes two adjustment plates 401 arranged up and down, and the two adjustment plates 401 are connected by at least three adjustment bolts 402 .

[0045] Specifically, in the present embodiment, there are four adjustment bolts 402, which are respectively arranged and connected at the four corners of the upper and lower adjustment plates 401. The four adjustment bolts 402 are respectively provided with nuts on the upper and lower sides of each adjustment plate 401. By adjusting the four adjustment bolts 402 and the nuts, the state of the horizontal adjustment platform 4 can be changed, thereby adjusting the horizontal posture of the rotating support 7 and the feed product.

[0046] Example 4

[0047] like Figure 1-Figure 3As shown, the adjustment support 3 also includes a left-right adjustment platform 5, which includes a saddle 501 and a middle slide 502. The saddle 501 is fixedly connected to the horizontal adjustment platform 4, and the middle slide 502 is slidably connected to the saddle 501 along the left-right direction. The saddle 501 is provided with a first adjustment rod 503 connected to the middle slide 502. The adjustment support 3 also includes a front-back adjustment platform 6, which includes an upper slide 601, which is slidably connected to the middle slide 502 along the front-back direction, and the middle slide 502 is provided with a second adjustment rod 602 connected to the upper slide 601.

[0048] Specifically, a protrusion is provided on the top surface of the saddle 501 along the left-right direction, and a slide groove is provided on the bottom surface of the middle slide 502 along the left-right direction. The protrusion of the saddle 501 is embedded in the slide groove of the middle slide 502, so that the middle slide 502 can slide directionally on the saddle 501 along the left-right direction, thereby realizing the left-right adjustment of the adjustment support 3.

[0049] The relationship between the upper slide 601 and the middle slide 502 is similar to the relationship between the middle slide 502 and the saddle 501. A protrusion is provided on the top surface of the middle slide 502 along the front-to-back direction, and a slide groove is provided on the bottom surface of the upper slide 601 along the front-to-back direction. The protrusion of the middle slide 502 is embedded in the slide groove of the upper slide 601, so that the upper slide 601 can slide directionally on the middle slide 502 along the front-to-back direction, thereby realizing the front-to-back direction adjustment of the adjustment support 3.

[0050] In addition, an L-shaped adjustment plate is provided on the right side of the saddle 501, and coaxial holes are provided on the L-shaped adjustment plate and the middle slide seat 502. The first adjustment rod 503 is rotatably connected to the hole on the L-shaped adjustment plate and is threadedly connected to the hole on the middle slide seat 502, so that by twisting the first adjustment rod 503, the left and right movement of the middle slide seat 502 can be controlled.

[0051] The structure of the second adjustment rod 602 adjusting the upper slide 601 to move forward and backward is similar to the structure of the first adjustment rod 503 adjusting the middle slide 502 to move left and right, and will not be described in detail.

[0052] In addition, distance scales are provided on the middle slide 502 and the upper slide 601 respectively, for indicating the distances of left-right movement and front-back movement.

[0053] Example 5

[0054] like Figure 1-Figure 6As shown, the rotating support 7 includes a mounting seat 701 and a rotating platform 702, wherein the mounting seat 701 is fixedly connected to the adjustment support 3, and the rotating platform 702 is rotatably connected to the mounting seat 701. The outer side of the rotating platform 702 is a worm gear structure 703, and a worm structure 704 is rotatably provided on the mounting seat 701 and meshes with the worm gear structure 703 on the outer side of the rotating platform 702; a knob 705 is provided at the outer end of the worm structure 704. A dial 706 is provided at the rear side of the mounting seat 701, and a pointer 707 is connected to the rear end of the rotating platform 702 extending out of the mounting seat 701.

[0055] Specifically, the mounting base 701 is an outer frame structure, and a circular space is provided inside for the rotation of the rotating table 702; the rotating table 702 and the mounting base 701 are rotatably connected through a bearing, and when the rotating table 702 is controlled to rotate, the feed product installed on the rotating table 702 also rotates.

[0056] The rotation of the rotating platform 702 is controlled by the knob 705. The worm structure 704 is rotated by turning the knob 705, thereby driving the worm gear structure 703 outside the rotating platform 702, so that the rotating platform 702 is turned on and rotated. In addition, a fixed angle locking mechanism can also be set for the rotation of the rotating platform 702. For example, a sleeve is set on the mounting seat 701, and the inner wall of the sleeve is provided with ball grooves at ±45°, ±90°, and ±135°, and a ball plunger (or spring plunger) is set on the knob 705, so that the knob 705 is inserted in the sleeve and rotated. Whenever the knob 705 is turned to the position where the ball plunger is aligned with the ball groove, the knob 705 will be stuck and locked, so that the rotating platform 702 is fixed at the current angle; if the knob 705 is turned hard again, the ball plunger can be separated from the ball groove, and the knob 705 can continue to rotate to adjust the angle of the rotating platform 702.

[0057] During the rotation of the rotating platform 702, the pointer 707 at the rear end of the rotating platform 702 cooperates with the dial 706, and the user can observe the angle change.

[0058] Example 6

[0059] like Figure 1 As shown, a placement platform 9 is provided on the side of the mounting base 701 , and the placement platform 9 is used to place a laser level 901 .

[0060] Specifically, the laser level 901 is a prior art product, and its structure is not described in detail. The function of the laser level 901 in this embodiment is to ensure the high consistency between the test object and the test beacon. The laser level is fixed on this tooling, and its purpose is to align the position of the signal sending end in the laboratory with the position of the feed receiving part. Since the position of the transmitting end tens of meters away is fixed, the position of the adjustment support and the rotating support in this tooling needs to be adjusted to meet the above-mentioned position alignment. The position of the laser level remains unchanged relative to this tooling. At a certain initial position of this tooling, after turning on the laser level, a beam of light will be emitted to the above-mentioned transmitting end. Visually check whether the position of the light beam coincides with the position of the transmitting end. If they do not coincide, the position of the turntable and the movable table of the feed source can be manually fine-tuned to make the light of the laser level coincide with the transmitting end as much as possible. After that, the absorption test of the feed source can be carried out.

[0061] Example 7

[0062] like Figure 1 As shown, a front end of the rotating platform 702 away from the mounting seat 701 is connected to a glass fiber reinforced plastic dielectric ring 10 , and the feed product is mounted on the glass fiber reinforced plastic dielectric ring 10 .

[0063] Specifically, the feed source is connected to the rotating table 702 via a fiberglass medium ring 10, and the column 2 is also made of fiberglass. The fiberglass parts have a wave-transmitting effect in the tooling, which can reduce the problem of electromagnetic wave interference.

[0064] How and why this device is used:

[0065] Since the absorber 8 covers the periphery of the feed product, the interfering electromagnetic waves in the space outside the feed product are absorbed by the absorber 8, so the radiation of the feed product to the reflecting surface or lens is clearer, and the test process is less adversely affected by the interfering electromagnetic waves.

[0066] By turning the first adjustment rod 503, the middle slide 502 slides on the saddle 501 to adjust the left and right position of the feed product; by turning the second adjustment rod 602, the upper slide 601 slides on the middle slide 502 to adjust the front and back position of the feed product; by adjusting the four adjustment bolts 402 and nuts, the state of the horizontal adjustment platform 4 can be changed, and then the horizontal posture of the rotating support 7 and the feed product can be adjusted; by turning the knob 705, the worm structure 704 drives the worm gear structure 703 of the rotating platform 702 to rotate, thereby adjusting the angular posture of the feed product.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A feed source test tool, characterized in that: include: An adjustment support, wherein the adjustment support is connected to the upper part of the base through a column, and the spatial position of the feed product is adjusted through the adjustment support; A rotating support, on which the feed product is mounted, and which is mounted on the adjusting support, through which the angular position of the feed product is adjusted; The wave absorbing body is installed on the rotating support, and the wave absorbing body covers the periphery of the feed product.

2. The feed source test fixture according to claim 1, characterized in that: The wave absorbing body comprises a bottom plate, on which a wedge-shaped absorber is arranged.

3. The feed source test fixture according to claim 1, characterized in that: The adjustment support comprises a horizontal adjustment platform, and the horizontal adjustment platform comprises two adjustment plates arranged up and down, and the two adjustment plates are connected by at least three adjustment bolts.

4. The feed source test fixture according to claim 3, characterized in that: The adjustment support also includes a left and right adjustment platform, which includes a saddle and a middle slide seat. The saddle is fixedly connected to the horizontal adjustment platform, and the middle slide seat is slidably connected to the saddle along the left and right directions. The saddle is provided with a first adjustment rod connected to the middle slide seat.

5. The feed source test fixture according to claim 4, characterized in that: The adjustment support also includes a front-to-back adjustment platform, which includes an upper slide seat, which is slidably connected to the middle slide seat along the front-to-back direction, and a second adjustment rod connected to the upper slide seat is provided on the middle slide seat.

6. The feed source test fixture according to claim 1, characterized in that: The rotating support comprises a mounting seat and a rotating platform. The mounting seat is fixedly connected to the adjusting support, and the rotating platform is rotatably connected to the mounting seat.

7. The feed source test fixture according to claim 6, characterized in that: The outer side of the rotating platform is a worm gear structure, and the mounting seat is rotatably provided with a worm structure that meshes with the worm gear structure on the outer side of the rotating platform; The outer end of the worm structure is provided with a knob.

8. The feed source test fixture according to claim 6, characterized in that: A dial is provided at the rear side of the mounting seat, and a pointer is connected to the rear end of the rotating platform extending out of the mounting seat.

9. The feed source test fixture according to claim 6, characterized in that: A placement platform is provided on the side of the mounting seat, and the placement platform is used for placing a laser level.

10. The feed source test fixture according to claim 6, characterized in that: A glass fiber reinforced plastic dielectric ring is connected to the front end of the rotating platform away from the mounting seat, and the feed product is mounted on the glass fiber reinforced plastic dielectric ring.

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