SAR (Synthetic Aperture Radar) test fixture

Abstract

The utility model discloses an SAR (Synthetic Aperture Radar) test fixture, belongs to the technical field of SAR test, and aims to solve the problems of complex structure and high cost of the conventional SAR test equipment bracket. The SAR test clamp comprises a base (1), a supporting stand column (2), a connecting base (3), a horizontal cross rod (4), a connecting vertical rod (5), a suction cup rod (6) and a suction cup (7) which are sequentially connected, the horizontal cross rod (4) can move up and down and can rotate, the included angle between the connecting vertical rod (5) and the suction cup rod (6) can be adjusted, and the suction cup (7) can adsorb and fix equipment to be tested. The SAR test fixture is simple in structure, convenient to operate and low in cost.

Description

Technical Field

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

[0002] SAR stands for Specific Absorption Rate, which is generally called "Specific Absorption Rate" or "Characteristic Absorption Rate" in Chinese. It is the absorption ratio of electromagnetic wave energy of mobile phones or wireless products. Its definition process is: under the action of external electromagnetic fields, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate current, resulting in the absorption and dissipation of electromagnetic energy. SAR values ​​are used in biological dosimetry to characterize this physical process. CSAR refers to rapid SAR testing, which can quickly evaluate the electromagnetic radiation of mobile phones.

[0003] For example, Chinese utility model patent CN216745941U, published on June 14, 2022, discloses a "CSAR mobile phone automated testing device". Existing SAR test equipment brackets or CSAR test equipment brackets have problems of complex structure and high cost.

[0004] Glossary:

[0005] Dielectric constant: The real part of the complex dielectric constant of a lossy medium.

[0006] Model: A simplified model similar to the anatomical features of the human body, filled with a simulated fluid with dielectric properties similar to those of human tissue.

[0007] Specific absorption rate: refers to the electromagnetic radiation energy absorbed by unit mass of material per unit time.

[0008] Equipment bracket: During the SAR measurement process, the bracket used to fix the device under test according to the requirements of the test location. It should be made of low-loss dielectric material.

[0009] Equipment under test: The test equipment used to evaluate the specific absorption rate according to the provisions of this standard.

[0010] Large-size mobile phone: a device with a screen diagonal size greater than 16cm. Utility Model Content

[0011] In order to solve the problem that the existing SAR test equipment bracket has a complex structure and high cost, the utility model provides a SAR test fixture, which has a simple structure, is easy to operate and has low cost.

[0012] The technical solution adopted by the utility model to solve its technical problems is:

[0013] A SAR test fixture comprises a base, a supporting column, a connecting seat, a horizontal crossbar, a connecting vertical pole, a suction cup rod and a suction cup which are connected in sequence. The horizontal crossbar can move up and down, and can also rotate. The angle between the connecting vertical pole and the suction cup rod can be adjusted, and the suction cup can adsorb and fix the device to be tested.

[0014] The base is in a U-shaped structure, and comprises a left bottom plate, a front bottom plate and a right bottom plate which are connected in sequence, and the lower end of the supporting column is connected and fixed to the front bottom plate.

[0015] A front protrusion is connected to the front middle of the front bottom plate, and the lower end of the support column is connected and fixed to the front protrusion at the front middle of the front bottom plate.

[0016] The connecting seat is a block structure, and is provided with a column mounting through hole and a cross bar mounting through hole. The supporting column passes through the column mounting through hole, and the horizontal cross bar passes through the cross bar mounting through hole. The supporting column is perpendicular to the horizontal cross bar, and the supporting column and the connecting seat are clearance-fitted or transition-fitted. The connecting seat is connected with a first screwing bolt, and the tail end of the first screwing bolt can abut against the supporting column. The head of the first screwing bolt is provided with a first screwing handle.

[0017] The horizontal cross bar and the connecting seat are clearance-fitted or transition-fitted, and the horizontal cross bar can also move left and right. The connecting seat is also connected to a second screwing bolt, and the tail end of the second screwing bolt can abut against the horizontal cross bar. The head of the second screwing bolt is provided with a second screwing handle.

[0018] A vertical pole mounting through hole is provided at the left end of the horizontal cross bar, and the connecting vertical pole passes through the vertical pole mounting through hole. The horizontal cross bar is perpendicular to the connecting vertical pole, and the connecting vertical pole and the horizontal cross bar are clearance-fitted or transition-fitted. The horizontal cross bar is connected with a third screwing bolt, and the tail end of the third screwing bolt can abut against the connecting vertical pole, and the head of the third screwing bolt is provided with a third screwing handle.

[0019] The lower end of the connecting rod contains a front clamping strip and a rear clamping strip arranged at an interval front and rear, a groove is formed between the front clamping strip and the rear clamping strip, the upper part of the suction cup rod is located in the groove, and there is a spacing between the upper end of the suction cup rod and the bottom end of the groove, the rear clamping strip is connected to the fourth screwing bolt, the tail end of the fourth screwing bolt can abut against the suction cup rod, and the head of the fourth screwing bolt is provided with a fourth screwing handle.

[0020] A blind hole is provided on the upper part of the suction cup rod, and the body of the fourth screwing bolt contains a smooth rod section and a threaded section connected in sequence, the threaded section is located between the smooth rod section and the fourth screwing handle, the threaded section is threadedly connected to the rear clamping strip, the smooth rod section is inserted into the blind hole of the suction cup rod, the smooth rod section and the suction cup rod have a clearance fit or a transition fit, and the suction cup rod can rotate around the axis of the fourth screwing bolt.

[0021] The SAR test fixture also includes a protractor, which is a semicircular structure and has an arc edge and a straight edge. An angle scale is provided on the arc edge. The protractor is stacked and connected to the front clamp strip. The 90° direction of the protractor is parallel to the extension direction of the connecting pole, and the axis of the fourth screw bolt passes through the center of the protractor.

[0022] The base, connecting seat, supporting column, horizontal cross bar, connecting column, suction cup rod and suction cup are all made of insulating materials. The suction cup can fix the 50kg device to be tested.

[0023] The beneficial effects of the utility model are:

[0024] 1. The SAR test fixture has a simple structure, which saves equipment manufacturing and maintenance costs.

[0025] 2. The SAR test fixture can fix large-sized mobile terminal devices, thereby improving the accuracy of detection.

[0026] 3. The SAR test fixture reduces operation steps and improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0028] Figure 1 It is a front view schematic diagram of the SAR test fixture of the utility model.

[0029] Figure 2 It is a left side schematic diagram of the SAR test fixture of the utility model.

[0030] Figure 3 It is a right side schematic diagram of the SAR test fixture of the utility model.

[0031] Figure 4 It is a top view schematic diagram of the SAR test fixture of the utility model.

[0032] Figure 5 This is a schematic diagram of the base.

[0033] Figure 6 It is a cross-sectional schematic diagram of the connection seat part.

[0034] Figure 7 It is a cross-sectional schematic diagram connecting the lower part of the vertical pole.

[0035] Figure 8 Schematic diagram of the fourth screw bolt.

[0036] Fig. 9It is a schematic diagram of a protractor.

[0037] Fig.10 It is a schematic diagram of the suction cup rod rotating around the axis of the fourth screwing bolt.

[0038] Fig.11 It is a schematic diagram of the horizontal crossbar rotating on its own axis.

[0039] 1. Base; 2. Support column; 3. Connecting seat; 4. Horizontal crossbar; 5. Connecting vertical rod; 6. Suction cup rod; 7. Suction cup; 8. Protractor;

[0040] 101. Left bottom plate; 102. Front bottom plate; 103. Right bottom plate; 104. Front protruding part;

[0041] 301. Column installation through hole; 302. Crossbar installation through hole; 303. First screwing bolt; 304. First screwing handle; 305. Second screwing bolt; 306. Second screwing handle;

[0042] 401. Vertical rod installation through hole; 402. Third screwing bolt; 403. Third screwing handle;

[0043] 501. Front clamping strip; 502. Rear clamping strip; 503. Groove; 504. Fourth screwing bolt; 505. Fourth screwing handle; 506. Smooth rod section; 507. Threaded section;

[0044] 601. Blind hole;

[0045] 801. Arc edge; 802. Straight edge; 803. Center. Specific implementation manner

[0046] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present utility model.

[0047] For the convenience of understanding and description, the following description of the present utility model adopts an absolute positional relationship. Without special explanation, the orientation word "upper" represents Figure 1 the upper side direction in Figure 1 the orientation word "lower" represents Figure 1 the lower side direction in Figure 1 the orientation word "left" represents Figure 1 the left side direction in Figure 1The paper surface and points to the direction outside the paper surface. The utility model adopts the observation perspective of the reader or user to describe, but the above-mentioned directional words cannot be understood or interpreted as limiting the protection scope of the utility model. Regarding the parameters such as the size of the components, those skilled in the art can determine them specifically according to actual needs.

[0048] like Figures 1 to 4 As shown, a SAR test fixture described in an embodiment of the utility model includes a base 1, a supporting column 2, a connecting seat 3, a horizontal cross bar 4, a connecting pole 5, a suction cup rod 6 and a suction cup 7 connected in sequence, the horizontal cross bar 4 can move up and down, the horizontal cross bar 4 can also rotate, the angle between the connecting pole 5 and the suction cup rod 6 can be adjusted, and the suction cup 7 can adsorb and fix the device to be tested.

[0049] The base 1 has a U-shaped structure, the length of the base 1 can be 350mm-450mm (for example, 400mm), the width of the base 1 can be 250mm-350mm (for example, 315mm), the base 1 includes a left bottom plate 101, a front bottom plate 102 and a right bottom plate 103 connected in sequence, the left end of the front bottom plate 102 is connected to the front end of the left bottom plate 101, the right end of the front bottom plate 102 is connected to the front end of the right bottom plate 103, and the lower end of the support column 2 is connected and fixed to the front bottom plate 102.

[0050] like Figure 1 and Figure 5 As shown, the front bottom plate 102 extends in the left-right direction, the left bottom plate 101 and the right bottom plate 103 both extend in the front-back direction, and a front protrusion 104 is connected to the front middle of the front bottom plate 102. Preferably, the lower end of the support column 2 is connected and fixed to the front protrusion 104 in the front middle of the front bottom plate 102. A column mounting hole is provided in the front protrusion 104, and the lower end of the support column 2 is inserted into the column mounting hole, and the support column 2 is in an upright state.

[0051] like Figure 6 As shown, the connecting seat 3 is a block structure (cube structure), and a column mounting hole 301 and a cross bar mounting hole 302 are arranged in the connecting seat 3. The column mounting hole 301 and the cross bar mounting hole 302 are arranged at intervals in front and back. The supporting column 2 passes through the column mounting hole 301, and the horizontal cross bar 4 passes through the cross bar mounting hole 302. The supporting column 2 is perpendicular to the horizontal cross bar 4, and the horizontal cross bar 4 is in a horizontal state.

[0052] The supporting column 2 and the connecting seat 3 are clearance-fitted or transition-fitted, and the connecting seat 3 can move up and down relative to the supporting column 2. The connecting seat 3 is connected to a first screwing bolt 303, and the axis of the first screwing bolt 303 extends along the front-to-back direction. The tail end of the first screwing bolt 303 can abut against the supporting column 2. The first screwing bolt 303 is threadedly connected to the connecting seat 3, and the head of the first screwing bolt 303 is provided with a first screwing handle 304.

[0053] The horizontal cross bar 4 and the connecting seat 3 are clearance-fitted or transition-fitted, and the horizontal cross bar 4 can move left and right relative to the connecting seat 3. The connecting seat 3 is also connected with a second screw bolt 305, and the axis of the second screw bolt 305 extends in the front-back direction. The tail end of the second screw bolt 305 can abut against the horizontal cross bar 4. The second screw bolt 305 is threadedly connected to the connecting seat 3, and the head of the second screw bolt 305 is provided with a second screw handle 306. The cross section of the horizontal cross bar 4 is a standard circle, and the horizontal cross bar 4 can rotate with the axis of the horizontal cross bar 4 as the axis, such as Fig.11 As shown, the first screwing handle 304 and the second screwing bolt 305 are arranged in a front-to-back spacing.

[0054] like Figures 1 to 4 As shown, the connecting pole 5 and the supporting column 2 are spaced apart on the left and right, a pole mounting through hole 401 is provided at the left end of the horizontal cross bar 4, the connecting pole 5 passes through the pole mounting through hole 401, the horizontal cross bar 4 is perpendicular to the connecting pole 5, the connecting pole 5 and the horizontal cross bar 4 are clearance-fitted or transition-fitted, the horizontal cross bar 4 is connected with a third screwing bolt 402, the tail end of the third screwing bolt 402 can abut against the connecting pole 5, the head of the third screwing bolt 402 is provided with a third screwing handle 403, and the third screwing bolt 402 is threadedly connected to the horizontal cross bar 4.

[0055] like Figure 7 As shown, the upper part of the connecting rod 5 passes through the rod mounting through hole 401 of the horizontal cross bar 4, and the lower end of the connecting rod 5 contains a front clamping strip 501 and a rear clamping strip 502 arranged at a front-to-back interval, and the front clamping strip 501 and the rear clamping strip 502 both extend in the up-down direction, and a groove 503 is formed between the front clamping strip 501 and the rear clamping strip 502, and the opening of the groove 503 faces the front, the bottom and the rear, and the upper part of the suction cup rod 6 is located in the groove 503, and the front clamping strip 501, the suction cup rod 6 and the rear clamping strip 502 are stacked and connected in sequence from front to back.

[0056] In order to facilitate the rotation of the suction cup rod 6 relative to the connecting upright rod 5, there is a gap between the upper end of the suction cup rod 6 and the bottom end of the groove 503, and the rear clamping strip 502 is connected with a fourth screw bolt 504, the tail end of the fourth screw bolt 504 can abut against the suction cup rod 6, and the head of the fourth screw bolt 504 is provided with a fourth screw handle 505, and the fourth screw bolt 504 is threadedly connected with the rear clamping strip 502. In order to improve the strength of the rear clamping strip 502, an annular protrusion can be provided on the rear side surface of the rear clamping strip 502, the annular protrusion is connected to the rear clamping strip 502 as a whole, the annular protrusion is sleeved outside the fourth screw bolt 504, and the annular protrusion is externally threadedly connected with the fourth screw bolt 504.

[0057] like Figure 7 , Figure 8 and Fig.10As shown, a blind hole 601 is provided on the upper portion of the suction cup rod 6, and the body of the fourth screwing bolt 504 contains a smooth rod section 506 (without threads on the outer surface) and a threaded section 507 which are connected in sequence, and the threaded section 507 is located between the smooth rod section 506 and the fourth screwing handle 505, and the threaded section 507 is threadedly connected to the rear clamping strip 502, and the smooth rod section 506 is inserted into the blind hole 601 of the suction cup rod 6, and the length of the smooth rod section 506 is greater than the depth of the blind hole 601, and the smooth rod section 506 and the suction cup rod 6 have a clearance fit or a transition fit, and the suction cup rod 6 can rotate around the axis of the fourth screwing bolt 504, and the outer end of the smooth rod section 506 can abut against the bottom end of the blind hole 601.

[0058] like Figure 1 and Fig. 9 As shown, the SAR test fixture also includes a protractor 8, which is a semicircular structure. The protractor 8 includes an arc edge 801 and a straight edge 802. An angle scale is provided at the arc edge 801. The protractor 8 can measure the angle between the connecting pole 5 and the suction cup rod 6. The protractor 8 is stacked front and back with the front clamping strip 501. The 90° direction of the protractor 8 is parallel to the extension direction of the connecting pole 5. The axis of the fourth screwing bolt 504 passes through the center 803 of the protractor 8, the axis of the connecting pole 5 intersects with the axis of the fourth screwing bolt 504, and the axis of the suction cup rod 6 also intersects with the axis of the fourth screwing bolt 504.

[0059] All the components in the SAR test fixture can be made of existing low dielectric constant materials. For example, the base 1, the supporting column 2, the connecting seat 3, the horizontal crossbar 4, the connecting pole 5, the suction cup rod 6 and the suction cup 7 are all made of insulating materials. The lower end of the suction cup rod 6 is connected to the suction cup 7, and the working surface of the suction cup 7 (the surface in contact with the adsorbed object) faces downward. The suction cup 7 adsorbs and fixes the 50kg device to be tested. The diameter of the suction cup 7 can be 50mm-80mm (for example, 60mm). In order to improve the fixing ability of the suction cup 7, the working surface of the suction cup 7 can be stacked and connected with double-sided tape. In order to facilitate the display of the angle value between the connecting pole 5 and the suction cup rod 6, an auxiliary line is set on the rear side of the suction cup rod 6. The auxiliary line is Figure 1 The dotted line passing through the suction cup rod 6.

[0060] The following describes the working process of the SAR test fixture (also referred to as a SAR test equipment bracket). The initial state of the SAR test fixture can be as follows: Figure 1 shown.

[0061] Loosen the first screw bolt 303, the connection seat 3, the horizontal cross bar 4, the connection pole 5, the sucker rod 6 and the sucker 7 can all move up and down. Tighten the first screw bolt 303, the connection seat 3, the horizontal cross bar 4, the connection pole 5, the sucker rod 6 and the sucker 7 are all stationary.

[0062] By loosening the second screw bolt 305, the horizontal cross bar 4, the connecting pole 5, the suction cup rod 6 and the suction cup 7 can all move left and right, and the horizontal cross bar 4, the connecting pole 5, the suction cup rod 6 and the suction cup 7 can all rotate around the axis of the horizontal cross bar 4. By tightening the second screw bolt 305, the horizontal cross bar 4, the connecting pole 5, the suction cup rod 6 and the suction cup 7 are all stationary.

[0063] By loosening the third screw bolt 402, the connecting pole 5, the suction cup rod 6 and the suction cup 7 can all move rightward up and down; by tightening the third screw bolt 402, the connecting pole 5, the suction cup rod 6 and the suction cup 7 can all remain stationary.

[0064] Loosen the fourth screw bolt 504, the suction cup rod 6 can rotate around the axis of the fourth screw bolt 504 to adjust the angle α between the axis of the connecting pole 5 and the axis of the suction cup rod 6. The protractor 8 can adopt existing technology products. The protractor 8 can measure the angle α between the axis of the connecting pole 5 and the axis of the suction cup rod 6. When the angle α between the axis of the connecting pole 5 and the axis of the suction cup rod 6 is the required angle, tighten the fourth screw bolt 504, and the front clamping strip 501 and the rear clamping strip 502 can clamp and fix the suction cup rod 6, and the angle α between the axis of the connecting pole 5 and the axis of the suction cup rod 6 remains fixed.

[0065] Among them, the axis of the supporting column 2 is Figure 1 The dotted line passing through the support column 2, the axis of the horizontal crossbar 4 is Figure 1 The dotted line passing through the horizontal crossbar 4 connects the axis of the vertical rod 5. Figure 1 The dotted line passing through the connecting pole 5, the axis of the suction cup rod 6 is Figure 1 The dotted line passing through the suction cup rod 6.

[0066] The following is a detailed introduction to the usage of testing the sar3d model.

[0067] The device under test is located below the suction cup 7. The device under test (sar3d head model) is fixed to the suction cup 7. The SAR test fixture is adjusted to place the device under test close to the test standard. After the close test, the angle between the suction cup rod 6 and the suction cup 7 is adjusted to tilt by 15° (increase or decrease the angle between the axis of the connecting pole 5 and the axis of the suction cup rod 6 by 15°) and then test again. When using the csar3d body model, fix the device under test (csar3d body model) to the suction cup 7 and test according to the standard requirements. The first fixation of the device under test can test 5 positions, and the last position needs to be fixed again.

[0068] When the DASY system is in use, the device under test is located above the suction cup 7. The horizontal crossbar 4 can be rotated so that the suction cup rod 6 and the suction cup 7 are both located above the horizontal crossbar 4. The connecting pole 5 is erected and placed for testing according to the standard. The suction cup 7 can fix large-sized mobile terminal devices. The device under test is fixed to the suction cup 7, and the SAR test fixture is adjusted to place the device under test closely according to the test standard requirements. After the close-fitting test is completed, the angle of the suction cup rod 6 and the suction cup 7 is adjusted to tilt by 15° (the angle between the axis of the connecting pole 5 and the axis of the suction cup rod 6 is increased or decreased by 15°) and then tested. In the case of the csar3d body model, the device under test (csar3d body model) is fixed to the suction cup 7 and tested according to the standard requirements. The first time the device under test is fixed, 5 positions can be tested, and the last position needs to be fixed again.

[0069] The above is only a specific embodiment of the utility model, and it cannot be used to limit the scope of the utility model. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the utility model patent should still fall within the scope of this patent. In addition, the technical features of the utility model can be freely combined with each other, with technical features and technical solutions, and with technical solutions.

Claims

1. A SAR test fixture, characterized in that: The SAR test fixture comprises a base (1), a supporting column (2), a connecting seat (3), a horizontal crossbar (4), a connecting column (5), a suction cup rod (6) and a suction cup (7) which are connected in sequence; the horizontal crossbar (4) can move up and down, the horizontal crossbar (4) can also rotate, the angle between the connecting column (5) and the suction cup rod (6) can be adjusted, and the suction cup (7) can adsorb and fix the device to be tested.

2. The SAR test fixture according to claim 1, characterized in that: The base (1) is a U-shaped structure, comprising a left bottom plate (101), a front bottom plate (102) and a right bottom plate (103) which are connected in sequence, and the lower end of the supporting column (2) is connected and fixed to the front bottom plate (102).

3. The SAR test fixture according to claim 2, characterized in that: A front protrusion (104) is connected to the front middle of the front bottom plate (102), and the lower end of the support column (2) is connected and fixed to the front protrusion (104) at the front middle of the front bottom plate (102).

4. The SAR test fixture according to claim 1, characterized in that: The connecting seat (3) is a block structure, and a column mounting through hole (301) and a crossbar mounting through hole (302) are arranged in the connecting seat (3); the supporting column (2) passes through the column mounting through hole (301), and the horizontal crossbar (4) passes through the crossbar mounting through hole (302); the supporting column (2) is perpendicular to the horizontal crossbar (4); the supporting column (2) and the connecting seat (3) are clearance-fitted or transition-fitted; the connecting seat (3) is connected with a first screwing bolt (303); the tail end of the first screwing bolt (303) can abut against the supporting column (2); and the head of the first screwing bolt (303) is provided with a first screwing handle (304).

5. The SAR test fixture according to claim 4, characterized in that: The horizontal cross bar (4) and the connecting seat (3) are clearance-fitted or transition-fitted, and the horizontal cross bar (4) can also move left and right. The connecting seat (3) is also connected to a second screwing bolt (305), and the tail end of the second screwing bolt (305) can abut against the horizontal cross bar (4). The head of the second screwing bolt (305) is provided with a second screwing handle (306).

6. The SAR test fixture according to claim 1, characterized in that: The left end of the horizontal cross bar (4) is provided with a vertical pole mounting through hole (401), the connecting vertical pole (5) passes through the vertical pole mounting through hole (401), the horizontal cross bar (4) is perpendicular to the connecting vertical pole (5), the connecting vertical pole (5) and the horizontal cross bar (4) are clearance-fitted or transition-fitted, the horizontal cross bar (4) is connected with a third screwing bolt (402), the tail end of the third screwing bolt (402) can abut against the connecting vertical pole (5), and the head of the third screwing bolt (402) is provided with a third screwing handle (403).

7. The SAR test fixture according to claim 1, characterized in that: The lower end of the connecting rod (5) comprises a front clamping strip (501) and a rear clamping strip (502) which are arranged at a front-back interval, a groove (503) is formed between the front clamping strip (501) and the rear clamping strip (502), the upper part of the suction cup rod (6) is located in the groove (503), and there is a spacing between the upper end of the suction cup rod (6) and the bottom end of the groove (503), the rear clamping strip (502) is connected with a fourth screwing bolt (504), the tail end of the fourth screwing bolt (504) can abut against the suction cup rod (6), and the head of the fourth screwing bolt (504) is provided with a fourth screwing handle (505).

8. The SAR test fixture according to claim 7, characterized in that: A blind hole (601) is provided at the upper portion of the suction cup rod (6); the body of the fourth screwing bolt (504) comprises a smooth rod section (506) and a threaded section (507) which are connected in sequence; the threaded section (507) is located between the smooth rod section (506) and the fourth screwing handle (505); the threaded section (507) is threadedly connected to the rear clamping strip (502); the smooth rod section (506) is inserted into the blind hole (601) of the suction cup rod (6); the smooth rod section (506) and the suction cup rod (6) are clearance-fitted or transition-fitted; the suction cup rod (6) can rotate around the axis of the fourth screwing bolt (504).

9. The SAR test fixture according to claim 8, characterized in that: The SAR test fixture further comprises a protractor (8), the protractor (8) being a semicircular structure, the protractor (8) comprising an arcuate edge (801) and a straight edge (802), an angle scale being arranged at the arcuate edge (801), the protractor (8) being connected in a stacked manner to the front clamping strip (501), the 90° direction of the protractor (8) being parallel to the extension direction of the connecting vertical pole (5), and the axis of the fourth screw bolt (504) passing through the center (803) of the protractor (8).

10. The SAR test fixture according to claim 1, characterized in that: The base (1), the connecting seat (3), the supporting column (2), the horizontal crossbar (4), the connecting column (5), the suction cup rod (6) and the suction cup (7) are all made of insulating materials, and the suction cup (7) absorbs and fixes the 50kg device to be tested.

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