Transverse electromagnetic wave chamber

Abstract

The utility model provides a transverse electromagnetic wave chamber, which comprises a shielding shell and a core plate arranged in the shielding shell, and the core plate comprises a main transmission section. The transition sections are connected to the two opposite ends of the main transmission section correspondingly, and the width of the transition sections is gradually reduced in the direction away from the main transmission section; the width of one end, connected to the main transmission section, of the transition section is smaller than that of the end, connected to the transition section, of the main transmission section, so that the core plate forms width jump at the joint of the transition section and the main transmission section. According to the transverse electromagnetic wave chamber provided by the utility model, the connection part of the transition section and the main transmission section of the core plate adopts a width hopping design to offset a deviation value which is reduced by actual impedance relative to theoretical calculation and is caused by correcting boundary conditions of the transition section, so that the overall impedance uniformity of the transition section and the main transmission section of the core plate is improved; therefore, the reflection coefficient and the standing-wave ratio of the transverse electromagnetic wave cell are reduced, and the test performance of the transverse electromagnetic wave cell is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic compatibility testing, and particularly relates to a transverse electromagnetic wave chamber. Background Art

[0002] The core plate of the existing transverse electromagnetic wave chamber (TEM Cell, also known as transverse electromagnetic wave small chamber) is usually divided into three parts, including a rectangular main transmission section in the middle, and two isosceles trapezoidal or triangular transition sections respectively arranged at both ends of the main transmission section. The impedance of the core plate is an important parameter, which determines the reflection coefficient and standing wave ratio of the transverse electromagnetic wave chamber.

[0003] Currently, for the transverse electromagnetic wave chamber with such a three-section core plate, the size of the transverse electromagnetic wave chamber is usually directly calculated according to the impedance calculation formula of the transverse electromagnetic wave chamber given in the existing literature, as Figure 1 shown. However, it is found in the research process that the impedance calculation formula of the transverse electromagnetic wave chamber given in the existing literature actually only describes the impedance of the main transmission section: if the impedance of the transition section is still calculated using the above formula, there will be a deviation in the calculation result. Further research finds that the reason for the calculation deviation of the transition section impedance is caused by the boundary conditions of the transition section.

[0004] As Figure 2 shown, the parameter W used in the existing formula to calculate impedance refers to the length of line A in the figure. It has no problem when used to calculate the impedance of the rectangular main transmission section (because the electric field direction represented by line A satisfies the boundary condition of being perpendicular to the straight side of the metal core plate of the rectangular main transmission section); but actually when calculating the impedance of the isosceles trapezoidal or triangular transition section, the boundary conditions of the isosceles trapezoidal or triangular transition section (the electric field direction must be perpendicular to the inclined side of the metal core plate of the isosceles trapezoidal or triangular transition section) make the actual impedance of the isosceles trapezoidal or triangular transition section approximately determined by the length of line B in the figure. Therefore, when designing and manufacturing the existing transverse electromagnetic wave chamber, the actual impedance of its transition section is less than the theoretical impedance calculated by the formula, resulting in the impedance of the transition section of the traditional three-section core plate transverse electromagnetic wave chamber design being inconsistent with the impedance of the main transmission section, leading to uneven overall impedance of the transverse electromagnetic wave chamber, thus making the reflection coefficient and standing wave of the transverse electromagnetic wave chamber too high, and further affecting its test performance. Summary of the Utility Model

[0005] The utility model provides a transverse electromagnetic wave chamber to solve the technical problem that the impedance of the transition section designed according to the formula of the existing three-section transverse electromagnetic wave chamber is inconsistent with the impedance of the main transmission section.

[0006] To solve the above problems, the technical solution adopted by the utility model is:

[0007] The utility model provides a transverse electromagnetic wave chamber, including:

[0008] A shielding housing and a core board disposed inside the shielding housing, the core board comprising:

[0009] A main transmission section;

[0010] A pair of transition sections respectively connected to opposite ends of the main transmission section, the width of the transition section gradually shrinking in a direction away from the main transmission section;

[0011] The width of the transition section at the end connected to the main transmission section is smaller than the width of the end of the main transmission section connected to the transition section, causing a width jump at the connection between the transition section and the main transmission section of the core board.

[0012] Preferably, the main transmission section is in the shape of a rectangular plate, and the transition section is in the shape of an isosceles trapezoidal plate, including a bottom long side and a top short side disposed opposite to each other, and a pair of inclined sides respectively connecting between opposite ends of the bottom long side and the top short side; or the transition section is in the shape of an isosceles triangle, including a bottom long side and a tip disposed opposite to each other, and a pair of inclined sides respectively connecting between opposite ends of the bottom long side and the tip;

[0013] A pair of transition sections are respectively connected to the rectangular sides of opposite ends of the main transmission section with their bottom long sides, and the length of the bottom long side is smaller than the length of the rectangular side, causing a width jump at the connection between the transition section and the main transmission section of the core board.

[0014] Preferably, four chamfers are respectively provided at the four corners of the main transmission section. While the bottom long side is connected to the rectangular side, the inclined sides are flush with the chamfers.

[0015] Preferably, a pair of triangular cut-out portions are respectively formed at a pair of bottom corners of the transition section, and the edges of the cut-out portions corresponding to the bottom corners coincide with the right-angle sides corresponding to the rectangular sides.

[0016] Preferably, the main transmission section and the transition section are flush and butt-jointed, and a pair of transition sections are mirror-symmetrically arranged at opposite ends of the main transmission section. The axis line passing through the pair of rectangular sides of the main transmission section coincides with the corresponding axis lines of the pair of transition sections, making the core board axially symmetrically distributed.

[0017] Preferably, the shielding housing includes:

[0018] A main shielding shell surrounding the outer peripheral side of the main transmission section;

[0019] A pair of transition shielding shells respectively connected to opposite ends of the main shielding shell and respectively surrounding the corresponding outer peripheral sides of a pair of transition sections. The radial dimension of the transition shielding shell gradually shrinks in a direction away from the main shielding shell;

[0020] The core board is installed in the inner cavity of the shielding housing through an insulating connection structure, and the inner cavity is divided into an upper cavity between the top wall of the shielding housing and the core board, and a lower cavity between the bottom wall of the shielding housing and the core board.

[0021] Preferably, the main shielding shell is in the shape of a cuboid, and the length of the main shielding shell matches the length of the main transmission section;

[0022] The transition shielding shell is in the shape of a quadrangular pyramid, and the length of the transition shielding shell in the height direction of the quadrangular pyramid matches the length of the transition section;

[0023] A pair of transition shielding shells are respectively connected to the opposite ends of the main shielding shell through the bottom ends of the quadrangular pyramids, and the pair of transition shielding shells are arranged in a mirror image of each other at the opposite ends of the main shielding shell. The axis line of the main shielding shell coincides with the corresponding axis lines of the pair of transition shielding shells and the axis line of the core plate, so that the shielding shell body and the core plate are coaxial and axially symmetrically distributed.

[0024] Preferably, a rectangular opening coaxially arranged with the core plate is provided at the tip of the quadrangular pyramid of the transition shielding shell;

[0025] A pair of connecting lines are respectively made between a pair of right-angled sides at both ends of the rectangular side and the inner side walls opposite to the rectangular opening. Then, the pair of connecting lines are axially symmetrically distributed with respect to the axis line of the core plate, and the width of any position in the direction of the axis line of the core plate between the pair of inclined sides is smaller than the width of the corresponding position between the pair of connecting lines at the same place.

[0026] Furthermore, the transverse electromagnetic wave chamber further includes:

[0027] A radio frequency connector is provided at the rectangular opening, and one end of the radio frequency connector extends into the inner cavity and is connected to the tip or the short side at the top.

[0028] Furthermore, the transverse electromagnetic wave chamber further includes:

[0029] A plurality of rollers are arranged at intervals at the bottom of the main shielding shell;

[0030] A shielding door is provided on one side of the main shielding shell for opening and closing the inner cavity to allow the target test object to enter and exit;

[0031] A positioning structure is provided in the inner cavity for positioning and installing the target test object.

[0032] Compared with the prior art, the present utility model has the following beneficial effects:

[0033] In the transverse electromagnetic wave chamber provided by the present utility model, a width jump design is adopted at the connection between the transition section and the main transmission section of the core plate to offset and correct the deviation value of the actual impedance relative to the theoretical calculation caused by the boundary conditions of the transition section, improve the overall impedance uniformity of the transition section and the main transmission section, and reduce the reflection coefficient and standing wave ratio of the transverse electromagnetic wave chamber. Description of the Drawings

[0034] To more clearly illustrate the technical solution proposed by the present utility model, the present utility model will be described in detail below in conjunction with embodiments and drawings. It should be understood that the embodiments and drawings in the following specific implementation manners and the description of the drawings of the specification are only some embodiments of the present utility model, and those skilled in the art can make changes to these drawings under the concept of the present utility model.

[0035] Figure 1 Schematic diagram of the calculation formula for the impedance of an existing transverse electromagnetic cell;

[0036] Figure 2 For use Figure 1 Schematic diagram of the principle of deviation in calculating the impedance of the transition section using the shown calculation formula;

[0037] Figure 3 Schematic diagram of the three-dimensional structure of the first embodiment of the transverse electromagnetic cell provided by the present utility model;

[0038] Figure 4 Schematic diagram of the front view structure of the first embodiment of the transverse electromagnetic cell provided by the present utility model;

[0039] Figure 5 Schematic diagram of the side view structure of the first embodiment of the transverse electromagnetic cell provided by the present utility model;

[0040] Figure 6 For Figure 5 Partial enlarged structure diagram of the C area of the transverse electromagnetic cell in

[0041] Figure 7 For Figure 3 Explosion structure diagram of the transverse electromagnetic cell in

[0042] Figure 8 For Figure 3 Cross-sectional structure diagram of the transverse electromagnetic cell in along the D-D direction;

[0043] Figure 9 For Figure 3 Cross-sectional structure diagram of the transverse electromagnetic cell in along the E-E direction;

[0044] Figure 10 For Figure 3 Cross-sectional structure diagram of the transverse electromagnetic cell in along the F-F direction;

[0045] Figure 11 For Figure 8 Partial enlarged structure diagram of the transverse electromagnetic cell of the first embodiment in

[0046] Figure 12 Partial enlarged cross-sectional structure diagram of the second embodiment of the transverse electromagnetic cell provided by the present utility model.

[0047] Among them, the main reference numerals in the figures are as follows:

[0048] 1. Shielding housing; 10. Inner cavity; 101. Upper cavity; 102. Lower cavity; 11. Main shielding shell; 111. Rectangular shielding plate; 12. Transition shielding shell; 121. Isosceles trapezoidal shielding plate; 122. Bottom end of the quadrangular pyramid; 123. Tip of the quadrangular pyramid; 124. Rectangular opening; 1241. Inner side wall; 2. Core plate; 21. Main transmission section; 211. Rectangular side; 212. Chamfer; 213. Right-angled side; 22. Transition section; 221. Bottom long side; 222. Top short side; 223. Inclined side; 224. Removal part; 2241. Corner.

[0049] Among them, the other reference numerals in the figures are as follows:

[0050] G. Axis line; I. Connecting line; J. Side length; K. Bottom side length; N. Inner wall length; P. Top side length; X. First horizontal direction; Y. Second horizontal direction; Z. Vertical direction. Detailed implementation manners

[0051] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the Figure 3-12 accompanying drawings and embodiments.

[0052] Please refer to Figure 3-12 together. The transverse electromagnetic wave chamber provided by the present utility model includes:

[0053] A shielding housing 1 and a core plate 2 disposed inside the shielding housing 1. The core plate 2 includes a main transmission section 21 disposed in the middle, and a pair of transition sections 22 respectively connected to opposite ends of the main transmission section 21. The width of the transition section 22 gradually contracts along the direction away from the main transmission section 21;

[0054] The width of the transition section 22 connected to one end of the main transmission section 21 is smaller than the width of the end of the main transmission section 21 connected to the transition section 22, so that a width jump occurs at the connection between the transition section 22 and the main transmission section 21 of the core plate 2.

[0055] Please refer to Figure 3 and 7-10. In the present embodiment, the main transmission section 21 is in the shape of a rectangular plate. Let the relative two ends of the main transmission section 21 respectively connecting a pair of transition sections 22 be a pair of rectangular side edges 211. And set the extending direction of the axis line G passing through the relative two ends of the main transmission section 21 respectively connecting a pair of transition sections 22 as the first horizontal direction X (that is, the first horizontal direction X is perpendicular to the pair of rectangular side edges 211). Set the extending direction of the axis line passing through the main transmission section 21 and connecting the other pair of side edges between the pair of rectangular side edges 211 as the second horizontal direction Y (that is, the second horizontal direction Y is perpendicular to the first horizontal direction X and parallel to the pair of rectangular side edges 211 at the same time).

[0056] Please refer to Figure 3 、 6 -9. In one embodiment, the transition section 22 is in the shape of an isosceles trapezoidal plate, including a bottom long side 221 and a top short side 222 which are oppositely arranged, and a pair of inclined side edges 223 respectively connecting the relative two ends of the bottom long side 221 in the second horizontal direction Y and the relative two ends of the top short side 222 in the second horizontal direction Y.

[0057] In another embodiment (not shown in the figure), the transition section 22 is in the shape of an isosceles triangle, including a bottom long side 221 and a triangle tip (not shown in the figure), and a pair of inclined side edges 223 respectively connecting the relative two ends of the bottom long side 221 in the second horizontal direction Y and the triangle tip.

[0058] Please refer to Figure 3 、 6 -8. In the present embodiment, a pair of transition sections 22 respectively connect their bottom long sides 221 to the corresponding rectangular side edges 211 of the relative two ends of the main transmission section 21 in the first horizontal direction X (i.e., the direction of the axis line G). And the height direction of the isosceles trapezoid or isosceles triangle of the pair of transition sections 22 coincides with the first horizontal direction X (i.e., the direction of the axis line G). That is, the corresponding axis line G of the pair of transition sections 22 coincides with the axis line G of the main transmission section 21, so that the pair of transition sections 22 and the main transmission section 21 are coaxially arranged.

[0059] Moreover, the length of the bottom long side 221 of the transition section 22 in the second horizontal direction Y is less than the length of the rectangular side 211 of the main transmission section 21 in the second horizontal direction Y, causing a width jump (i.e., a length jump in the second horizontal direction Y) at the connection between the core board 2 and the transition section 22 and the main transmission section 21. Due to the discontinuous change in width (i.e., a length jump in the second horizontal direction Y) at the connection between the transition section 22 and the main transmission section 21, the width of the bottom long side 221 of the transition section 22 of the core board 2 is reduced relative to the rectangular side 211 of the main transmission section 21, thereby increasing the impedance of the transition section 22 to offset and correct the deviation value of the actual impedance relative to the calculated theoretical impedance caused by the above boundary conditions of the transition section 22, and raising the impedance of the transition section 22 to be close to or the same as that of the main transmission section 21, thus improving the overall impedance uniformity of the transverse electromagnetic wave chamber and reducing its reflection coefficient and standing wave ratio.

[0060] Please refer to Figure 8 、 11 In the first embodiment of the transverse electromagnetic wave chamber provided by the present utility model:

[0061] Four chamfers 211 are respectively provided at the four rectangular corners of the main transmission section 21. While the bottom long side 221 of the transition section 22 is connected to the corresponding rectangular side 211 of the main transmission section 21, a pair of inclined sides 223 of the transition section 22 are respectively flush with a pair of chamfers 211 at the opposite ends of the corresponding rectangular side 211 in the second horizontal direction Y, causing a width jump (i.e., a length jump in the second horizontal direction Y) at the connection between the transition section 22 and the corresponding rectangular core board 211 through the chamfers 211, as Figure 11 shown.

[0062] Please refer to Figure 8 、 12 In the second embodiment of the transverse electromagnetic wave chamber provided by the present utility model, the differences between the transverse electromagnetic wave chamber and the first embodiment are as follows:

[0063] A pair of triangular removal parts 224 are respectively formed at a pair of bottom corners of the transition section 22 (i.e., the corresponding connection positions between the opposite ends of the bottom long side 221 in the second horizontal direction Y and a pair of inclined sides 223). When the bottom long side 221 of the transition section 22 is connected to the corresponding rectangular side 211 of the main transmission section 21, the corner edges 2241 of the pair of removal parts 224 corresponding to the bottom corners respectively coincide with a pair of right-angle edges 213 at the opposite ends of the corresponding rectangular side 211 (i.e., the corner edges 2241 of the removal parts 224 corresponding to the bottom corners coincide with the right-angle edge 213 at one end of the corresponding rectangular side 211), causing a width jump (i.e., a length jump in the second horizontal direction Y) at the connection between the transition section 22 and the corresponding main transmission section 21 through the empty positions formed by the removal parts 224, as Figure 12 shown.

[0064] Please refer to Figure 8-10 , as a common implementation manner of Embodiments 1 and 2, the main transmission section 21 and the transition section 22 are flush-docked, and a pair of transition sections 22 are arranged in a mirror image of each other at opposite ends of the main transmission section 21. The axis G of the main transmission section 21 passing through the center lines of a pair of rectangular side edges 211 coincides with the corresponding axis G of the pair of transition sections 22, so that while the pair of transition sections 22 are coaxially arranged with the main transmission section 21, the core plates 2 are axially symmetrically distributed with this axis G as the axis of symmetry.

[0065] Please refer to Figure 3-10 , as a common implementation manner of Embodiments 1 and 2, the shielding housing 1 includes:

[0066] A main shielding case 11, which surrounds the outer peripheral side of the main transmission section 21; a pair of transition shielding cases 12, which are respectively connected to opposite ends of the main shielding case 11 and respectively surround the corresponding outer peripheral sides of the pair of transition sections 22. The radial dimension of the transition shielding case 12 gradually shrinks in the direction away from the main shielding case 11;

[0067] The core plate 2 is installed in the inner cavity 10 of the shielding housing 1 through an insulating connection structure (not shown in the figure), and divides the inner cavity 10 into an upper cavity 101 located between the top wall of the shielding housing 1 and the core plate 2, and a lower cavity 102 located between the bottom wall of the shielding housing 1 and the core plate 2.

[0068] As a common preferred implementation manner of Embodiments 1 and 2, the insulating connection structure can adopt connection brackets, frames, grids, etc., for fixing and supporting the core plate 2 in the inner cavity 10 of the shielding housing 1.

[0069] Please refer to Figure 3-10 , as a common preferred implementation manner of Embodiments 1 and 2, the shape of the shielding housing 1 matches the shape of the core plate 2. Among them, the main shielding case 11 is in a cuboid shape, and the length of the transition shielding case 12 matches the length of the main transmission section 21. The transition shielding case 12 is in a quadrangular pyramid shape, and the length of the transition shielding case 12 in the height direction of its quadrangular pyramid matches the length of the transition section 22.

[0070] A pair of transition shielding cases 12 are respectively connected to opposite ends of the main shielding case 11 through the bottom ends 122 of their quadrangular pyramids, and a pair of transition shielding cases 12 are arranged in a mirror image of each other at opposite ends of the main shielding case 11. The four peripheral side walls of the main shielding case 11 and the height direction of the quadrangular pyramid of the transition shielding case 12 are all parallel to the first horizontal direction X. The axis G of the main shielding case 11 parallel to its four peripheral side walls coincides with the corresponding axis G of the pair of transition shielding cases 12 (that is, coincides with the axis G in the height direction of the quadrangular pyramid of the transition shielding case 12) and the axis G of the core plate 2, so that the axis G of the shielding housing 1 and the core plate 2 are coaxial and axially symmetrically distributed with this axis G, that is, the entire transverse electromagnetic wave chamber is axially symmetrically distributed with this axis G parallel to the first horizontal direction X.

[0071] Please refer to Figure 3-10 simultaneously. As a common implementation manner of Embodiments 1 and 2, the rectangular side walls of the main shielding case 11 on all four sides are sequentially connected by four rectangular shielding plates 111 surrounding the outer peripheral side of the main transmission section 21. The four-sided pyramid side walls of the transition shielding case 12 are sequentially connected by four isosceles trapezoidal shielding plates 121 surrounding the corresponding outer peripheral side of the transition section 22. A pair of rectangular shielding plates 111 opposite to each other on the upper and lower sides of the main shielding case 11 are horizontally arranged parallel to the first horizontal direction X. When the plane where the core plate 2 is located coincides with the axis line G of the shielding case 1 and is parallel to the pair of rectangular shielding plates 111 opposite to each other on the upper and lower sides of the main shielding case 11, that is, the plane where the core plate 2 is located is horizontally arranged parallel to the first horizontal direction X.

[0072] Please refer to Figure 3-10 simultaneously. As a common implementation manner of Embodiments 1 and 2, rectangular openings 124 coaxial with the core plate 2 (that is, the axis line G perpendicularly passes through the center of the rectangular opening 124) are provided at the four-sided pyramid tips 123 of a pair of transition shielding cases 12; a pair of connecting lines I are respectively made between a pair of right-angle sides 213 at both ends of the rectangular side 211 in the second horizontal direction Y and the inner side walls 1241 opposite to the rectangular opening 124. Then, the pair of connecting lines I are axially symmetrically distributed with respect to the axis line G of the core plate 2, and the width of the transition section 22 in the second horizontal direction Y at any position corresponding to the axis line G direction between a pair of inclined side edges 223 is smaller than the width of the corresponding position between the pair of connecting lines I at the same place in the second horizontal direction Y. As Figure 8 shown, the width of the transition section 22 in the second horizontal direction Y at each position of the axis line G is reduced, further increasing the impedance of the transition section 22 to offset and correct the deviation value of the actual impedance relative to the theoretical impedance reduction.

[0073] As another common implementation manner of Embodiments 1 and 2 (not shown in the figure), the four-sided pyramid side walls of the transition section 22 can also be sequentially connected by four isosceles triangle shielding plates (not shown in the figure) surrounding the corresponding outer peripheral side of the transition section 22.

[0074] Please refer to Figure 3 simultaneously. As a preferred implementation manner of Embodiments 1 and 2, the side length J of the rectangular side 211 of the main transmission section 21 in the second horizontal direction Y is 1680 mm, and the bottom side length K of the bottom long side 221 of the transition section 22 in the second horizontal direction Y is 1600 mm.

[0075] Please refer to Figure 4 and 6, 8, 10. As a common preferred implementation manner of the first and second embodiments, for the top short side 222 of the transition section 22, the top side length P is 7.88 mm. The distance s between the bottom long side 22 of the transition section 22 and the top short side 222 (i.e., the height direction length of the isosceles trapezoid or isosceles triangle of the transition section 22) and the distance S between the bottom 122 and the tip 123 of the quadrangular pyramid of the transition shielding case 12 (i.e., the height direction length of the quadrangular pyramid of the transition shielding case 12) are both 1031.17 mm. The length l of the main transmission section 21 in the first horizontal direction X and the length L of the main shielding case 11 in the first horizontal direction X are both 2000 mm. The length M of the main shielding case 11 in the vertical direction Z is 2000 mm. The length O of the main shielding case 11 in the second horizontal direction Y is 2000 mm. The inner wall side length N of the opening 124 of the tip 123 of the quadrangular pyramid of the transition shielding case 12 is 15 mm. The height h (plate thickness) of the main transmission section 21 and the transition section 22 of the core plate 2 in the vertical direction Z that is perpendicular to both the first horizontal direction X and the second horizontal direction Y simultaneously is 3 mm. The height H (plate thickness) of a pair of rectangular shielding plates 111 that are opposite to each other in the vertical direction Z of the main shielding case 11 (in the vertical direction Z) is 3 mm. The thickness Q (plate thickness) of a pair of rectangular shielding plates 111 that are opposite to each other in the second horizontal direction Y of the main shielding case 11 (in the second horizontal direction Y) is 3 mm.

[0076] As a common implementation manner of the first and second embodiments (not shown in the figure), the transverse electromagnetic wave chamber further includes:

[0077] A radio frequency connector (not shown in the figure), which is provided at the rectangular opening 124 of the tip 123 of the quadrangular pyramid of the transition shielding case 12, and one end of the radio frequency connector extends into the inner cavity 10 and is connected to the triangular tip or the top short side 222 of the transition section 22.

[0078] As a common implementation manner of the first and second embodiments (not shown in the figure), the transverse electromagnetic wave chamber further includes:

[0079] A plurality of rollers (not shown in the figure), which are arranged at intervals at the bottom of the main shielding case 11; a shielding door (not shown in the figure), which is provided on one side of the main shielding case 11 and is used to open and close the inner cavity 10 for the target test object (not shown in the figure) to enter and exit; a positioning structure, which is provided in the inner cavity 10 and is used to position and install the target test object.

[0080] As a common preferred implementation manner of the first and second embodiments, the main transmission section 21 and the transition section 22 are made of copper plates.

[0081] As a common preferred implementation manner of the first and second embodiments, the target test object is an integrated circuit board, a chip or a loop antenna.

[0082] As a preferred implementation manner common to the first and second embodiments (not shown in the figure), the positioning structure is disposed in the lower cavity 102 between the bottom wall of the shielding housing 1 (i.e., a rectangular shielding plate 111 disposed downward in the vertical direction) and the core plate 2. The positioning structure can adopt a positioning cavity, a positioning groove, a positioning pin, a positioning screw, etc.

[0083] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Those of ordinary skill in the art should understand that any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A transverse electromagnetic wave chamber, comprising a shielding housing (1) and a core board (2) disposed within the shielding housing (1), characterized in that, The core plate (2) includes: A main transmission section (21); A pair of transition sections (22), which are respectively connected to opposite ends of the main transmission section (21), and the width of the transition section (22) gradually shrinks in a direction away from the main transmission section (21); The width of the transition section (22) at the end connected to the main transmission section (21) is smaller than the width of the end of the main transmission section (21) connected to the transition section (22), so that a width jump occurs at the connection between the core plate (2) at the transition section (22) and the main transmission section (21).

2. The transverse electromagnetic wave chamber according to claim 1, wherein The main transmission section (21) is in the shape of a rectangular plate, and the transition section (22) is in the shape of an isosceles trapezoidal plate, including a bottom long side (221) and a top short side (222) arranged opposite to each other, and a pair of inclined side edges (223) respectively connecting between opposite ends of the bottom long side (221) and the top short side (222); or the transition section (22) is in the shape of an isosceles triangle, including a bottom long side (221) and a triangle tip arranged opposite to each other, and a pair of inclined side edges (223) respectively connecting between opposite ends of the bottom long side (221) and the triangle tip; A pair of transition sections (22) are respectively connected to the rectangular side edges (211) at opposite ends of the main transmission section (21) with their bottom long sides (221), and the length of the bottom long side (221) is smaller than the length of the rectangular side edge (211), so that a width jump occurs at the connection between the core plate (2) at the transition section (22) and the main transmission section (21).

3. The transverse electromagnetic wave chamber according to claim 2, characterized in that, Four chamfers (212) are respectively provided at the four corners of the main transmission section (21). While the bottom long side (221) is connected to the rectangular side edge (211), the inclined side edge (223) is flush with the chamfer (212).

4. The transverse electromagnetic wave chamber according to claim 2, characterized in that, A pair of triangular removal parts (224) are respectively formed at a pair of bottom corners of the transition section (22), and the corner edges (2241) of the removal parts (224) corresponding to the bottom corners coincide with the right-angle edges (213) corresponding to the rectangular side edges (211).

5. The transverse electromagnetic wave chamber according to claim 4, wherein, The main transmission section (21) and the transition section (22) are flush and butt-jointed, and a pair of transition sections (22) are arranged at opposite ends of the main transmission section (21) in a mirror image manner. The axis line (G) of the main transmission section (21) passing through a pair of the rectangular side edges (211) coincides with the corresponding axis line (G) of a pair of transition sections (22), so that the core plate (2) is axially symmetrically distributed.

6. The transverse electromagnetic wave chamber according to claim 5, characterized in that, The shielding housing (1) includes: A main shielding housing (11), which surrounds the outer peripheral side of the main transmission section (21); A pair of transition shielding housings (12), which are respectively connected to opposite ends of the main shielding housing (11) and respectively surround the corresponding outer peripheral sides of a pair of the transition sections (22). The radial dimension of the transition shielding housing (12) gradually shrinks in a direction away from the main shielding housing (11); The core plate (2) is installed in the inner cavity (10) of the shielding housing (1) through an insulating connection structure, and the inner cavity (10) is divided into an upper cavity (101) located between the top wall of the shielding housing (1) and the core plate (2), and a lower cavity (102) located between the bottom wall of the shielding housing (1) and the core plate (2).

7. The transverse electromagnetic wave chamber according to claim 6, wherein The main shielding housing (11) is in the shape of a cuboid, and the length of the main shielding housing (11) matches the length of the main transmission section (21); The transition shielding housing (12) is in the shape of a quadrangular pyramid, and the length of the transition shielding housing (12) in the height direction of the quadrangular pyramid matches the length of the transition section (22); A pair of transition shielding housings (12) are respectively connected to opposite ends of the main shielding housing (11) through the bottom ends (122) of their quadrangular pyramids, and the pair of transition shielding housings (12) are arranged in a mirror image of each other at opposite ends of the main shielding housing (11). The axis line (G) of the main shielding housing (11) coincides with the corresponding axis lines (G) of the pair of transition shielding housings (12) and the axis line (G) of the core plate (2), so that the shielding housing (1) and the core plate (2) are coaxial and axially symmetrically distributed.

8. The transverse electromagnetic wave chamber according to claim 7, wherein A rectangular opening (124) coaxial with the core plate (2) is provided at the tip (123) of the quadrangular pyramid of the transition shielding housing (12); A pair of connecting lines (I) are respectively made between the pair of right-angle sides (213) at both ends of the rectangular side (211) and the inner side walls (1241) opposite to the rectangular opening (124). Then, the pair of connecting lines (I) are axially symmetrically distributed with respect to the axis line (G) of the core plate (2), and the width of any position corresponding to the axis line (G) direction of the core plate (2) between the pair of inclined sides (223) is smaller than the width of the corresponding position between the pair of connecting lines (I) at the same place.

9. The transverse electromagnetic wave chamber according to claim 8, characterized in that, It further includes: A radio frequency connector is provided at the rectangular opening (124), and one end of the radio frequency connector extends into the inner cavity (10) and is connected to the triangular tip or the short side of the top end (222).

10. The transverse electromagnetic wave chamber according to claim 6, characterized in that, It further includes: A plurality of rollers are spacedly arranged at the bottom of the main shielding housing (11); A shielding door is provided on one side of the main shielding housing (11) for opening and closing the inner cavity (10) to allow the target test object to enter and exit; A positioning structure is provided in the inner cavity (10) for positioning and installing the target test object.

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