A superconducting filter shield box with tuning structure

Abstract

The application relates to the technical field of superconducting filters, in particular to a superconducting filter shielding box with a tuning structure, which comprises a bottom shell, a cover plate, a ceramic substrate, SMA joints and a bottom plate; the bottom shell is provided with openings at both ends, the bottom plate is installed at the opening at one end of the bottom shell, the ceramic substrate is adhered to the bottom plate through low-temperature-resistant conductive glue, two SMA joints are respectively fixed on the opposite two side walls of the bottom shell, one end of the SMA joint located in the bottom shell is welded with the ceramic substrate, the cover plate is arranged on the opening at the other end of the bottom shell, the cover plate is provided with two or more than two mounting holes which are uniformly distributed, tuning sleeves are arranged in the mounting holes, metal tuning columns are embedded in a part of all the tuning sleeves, and plastic tuning columns are embedded in the rest of all the tuning sleeves, so that the superconducting filter can normally work at low temperature, the performance is excellent and stable. Meanwhile, the superconducting filter shielding box with the manual tuning structure is convenient to debug and can be directly manually debugged, so that the work efficiency is greatly improved.

Description

A superconducting filter shielding box with tuning structure Technical Field

[0001] This invention relates to the field of superconducting filter technology, and in particular to a superconducting filter shielding box with a tuning structure. Background Technology

[0002] Currently available filter shielding boxes are only suitable for ordinary microstrip line filters. Ordinary microstrip line filters are mostly made of metal, allowing for direct drilling of holes in the filter and then fixing it to the shielding box with screws. Furthermore, since ordinary microstrip line filters operate at room temperature, there is no issue of thermal expansion coefficient matching due to thermal expansion and contraction, so the material of the shielding box can be chosen arbitrarily.

[0003] However, for superconducting filters, the substrate is made of fragile ceramic material, making it impossible to directly drill holes in its surface. Furthermore, since they operate at low temperatures, the matching of the thermal expansion coefficients of the shielding box material and the substrate must be considered. Therefore, existing commercially available microstrip filter shielding boxes are unsuitable for superconducting filters. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a superconducting filter shielding box with a tuning structure.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A superconducting filter shielding box with a tuning structure includes a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. The bottom shell has openings at both ends. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are fixed to opposite side walls of the bottom shell, with one end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve contains a metal tuning post, and the remaining portion contains a plastic tuning post.

[0007] Furthermore, the bottom shell is rectangular, and the number of mounting holes is eight. Every four mounting holes are grouped together and arranged at intervals along the length of the rectangle. The four mounting holes closest to the short side of the rectangle are used to install metal tuning pins, and the remaining mounting holes are used to install plastic tuning pins.

[0008] Furthermore, the bottom shell has a fixing hole at the middle position of the long side of the rectangle for fixing the bottom shell, bottom plate, and cover plate together as a whole.

[0009] Furthermore, the base plate is provided with strip-shaped grooves for placing ceramic substrates.

[0010] Furthermore, the mounting hole is a threaded hole.

[0011] Furthermore, the cover plate is provided with through holes for fixing to the mounting plate of the external device.

[0012] Furthermore, the cover plate has a semi-circular groove at its edge to avoid screws used to fix the base plate.

[0013] Furthermore, the number of semicircular grooves is four, with each pair of semicircular grooves forming a group and arranged at rectangular intervals along their length.

[0014] Furthermore, the plastic tuning column is made of PI material.

[0015] Furthermore, both the head and tail of the SMA connector are made of low-temperature resistant material.

[0016] The beneficial effects of this invention are as follows:

[0017] This invention provides a superconducting filter shielding box with a tuning structure, comprising a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. The bottom shell has openings at both ends. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are fixed to opposite side walls of the bottom shell, with one end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve contains a metal tuning post, and the remaining portion contains a plastic tuning post. This allows the superconducting filter to operate normally at low temperatures, exhibiting excellent and stable performance. It also features a manual tuning structure, facilitating direct manual adjustment and significantly improving work efficiency. The ceramic substrate is made of ceramic material, which can withstand ultra-low temperatures and has very little thermal deformation. However, it is a fragile material and cannot be drilled. Therefore, it is bonded to the base plate with low-temperature resistant conductive adhesive. At the same time, low-temperature resistant plastic tuning posts and metal tuning posts are designed, which can be selected according to performance requirements. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of a superconducting filter shielding box with a tuning structure according to the present invention;

[0019] Figure 2 is a top view of a superconducting filter shielding box with a tuning structure according to the present invention;

[0020] Figure 3 is a cross-sectional view at point AA in Figure 2;

[0021] Figure 4 is a cross-sectional view at point BB in Figure 2;

[0022] Figure 5 is a front view of a superconducting filter shielding box with a tuning structure according to the present invention;

[0023] Figure 6 is a side view of a superconducting filter shielding box with a tuning structure according to the present invention;

[0024] Figure 7 is a top view of the bottom shell of a superconducting filter shielding box with a tuning structure according to the present invention;

[0025] Figure 8 is a cross-sectional view at point CC in Figure 7;

[0026] Figure 9 is a bottom view of the cover plate of a superconducting filter shielding box with a tuning structure according to the present invention;

[0027] Figure 10 is a front view of the cover plate of a superconducting filter shielding box with a tuning structure according to the present invention;

[0028] Figure 11 is a top view of the bottom plate of a superconducting filter shielding box with a tuning structure according to the present invention;

[0029] Label Explanation:

[0030] 1. Bottom shell; 2. Cover plate; 3. Base plate; 4. Ceramic substrate; 5. Tuning sleeve; 6. Metal tuning post; 7. Plastic tuning post; 8. SMA connector;

[0031] 11. Screw hole; 12. Through hole; 13. Fixing hole; 14. Through hole; 15. Through hole. Detailed Implementation

[0032] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0033] Referring to Figures 1 to 11, the present invention provides a superconducting filter shielding box with a tuning structure, comprising a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. The bottom shell has openings at both ends. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are respectively fixed to opposite side walls of the bottom shell, with one end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve contains a metal tuning post, and the remaining portion contains a plastic tuning post.

[0034] As described above, the beneficial effects of this invention are as follows: This invention provides a superconducting filter shielding box with a tuning structure, comprising a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. Both ends of the bottom shell have openings. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are respectively fixed to opposite side walls of the bottom shell, with one end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve contains a metal tuning post, and the remaining portion contains a plastic tuning post. This allows the superconducting filter to operate normally at low temperatures, exhibiting excellent and stable performance. It also features a manual tuning structure, facilitating direct manual adjustment and greatly improving work efficiency. The ceramic substrate is made of ceramic material, which can withstand ultra-low temperatures and has very little thermal deformation. However, it is a fragile material and cannot be drilled. Therefore, it is bonded to the base plate with low-temperature resistant conductive adhesive. At the same time, low-temperature resistant plastic tuning posts and metal tuning posts are designed, which can be selected according to performance requirements.

[0035] Furthermore, the bottom shell is rectangular, and the number of mounting holes is eight. Every four mounting holes are grouped together and arranged at intervals along the length of the rectangle. The four mounting holes closest to the short side of the rectangle are used to install metal tuning pins, and the remaining mounting holes are used to install plastic tuning pins.

[0036] As can be seen from the above description, the above method achieves a reasonable arrangement of metal tuning posts and plastic tuning posts, which is convenient for practical use.

[0037] Furthermore, the bottom shell has a fixing hole at the middle position of the long side of the rectangle for fixing the bottom shell, bottom plate, and cover plate together as a whole.

[0038] As can be seen from the above description, by adopting the above method, the bottom shell, bottom plate, and cover plate are fixed together as a whole.

[0039] Furthermore, the base plate is provided with strip-shaped grooves for placing ceramic substrates.

[0040] As can be seen from the above description, the above method facilitates the precise placement of the ceramic substrate and helps to fix the relative position of the SMA connector and the ceramic substrate.

[0041] Furthermore, the mounting hole is a threaded hole.

[0042] As can be seen from the above description, the above method facilitates the installation of the tuning sleeve.

[0043] Furthermore, the cover plate is provided with through holes for fixing to the mounting plate of the external device.

[0044] As can be seen from the above description, the above method is used to fix the mounting plate of the peripheral device.

[0045] Furthermore, the cover plate has a semi-circular groove at its edge to avoid screws used to fix the base plate.

[0046] As can be seen from the above description, the above method can effectively avoid the screws used to fix the base plate and will not cause assembly obstacles.

[0047] Furthermore, the number of semicircular grooves is four, with each pair of semicircular grooves forming a group and arranged at rectangular intervals along their length.

[0048] Furthermore, the plastic tuning column is made of PI material.

[0049] As can be seen from the above description, the above method can be used for a long time in an environment of -200℃ to +300℃.

[0050] Furthermore, both the head and tail of the SMA connector are made of low-temperature resistant material.

[0051] As can be seen from the above description, the above method is adopted to adapt to low-temperature environments.

[0052] Please refer to Figures 1 to 11. Embodiment 1 of the present invention is as follows:

[0053] The present invention provides a superconducting filter shielding box with a tuning structure, comprising a bottom shell 1, a cover plate 2, a ceramic substrate 4, an SMA connector 8, and a base plate 3;

[0054] The bottom shell 1 has a rectangular horizontal cross-section. Both the top and bottom ends of the bottom shell 1 have openings, and the middle is hollowed out. The size of the opening at the bottom is adapted to the size of the bottom plate. The side of the bottom shell 1 corresponding to the short side of the rectangle is provided with threaded holes and semi-circular grooves for fixing SMA connectors. The top of the bottom shell 1 is provided with a screw hole 11 at each of the four corners of the rectangle for fixing the cover plate. The bottom shell 1 is provided with four through holes 12 for fixing the bottom plate at the long side of the rectangle. There are also two fixing holes 13 at the middle of the long side of the rectangle for fixing the bottom shell, bottom plate and cover plate together as one unit.

[0055] The base plate 3 is installed at the opening at the lower end of the bottom shell 1. The base plate 3 is provided with a strip groove for placing the ceramic substrate. The ceramic substrate is adhered to the base plate by low-temperature resistant conductive adhesive. The base plate is also provided with through holes for corresponding fixation with the bottom shell and the cover plate.

[0056] Two SMA connectors 8 are fixed to opposite side walls of the bottom shell, and one end of the SMA connector inside the bottom shell is welded to the ceramic substrate. The head and tail of the SMA connector are made of low-temperature resistant material to adapt to low-temperature environments.

[0057] The cover plate 2 is installed over the opening at the upper end of the bottom shell 1. The cover plate 2 has two or more evenly distributed mounting holes, which are threaded holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve is fitted with a metal tuning post 6, and the remaining portion is fitted with a plastic tuning post 7. Specifically, there are eight mounting holes, arranged in groups of four at rectangular intervals. The four mounting holes closest to the shorter side of the rectangle are used to install the metal tuning posts, and the remaining holes are used to install the plastic tuning posts. The plastic tuning posts are made of PI material and can be used long-term in environments ranging from -200℃ to +300℃.

[0058] The cover plate, bottom shell, and base plate are provided with through holes 14 and 15, each with a size of φ3mm, for fixing to the mounting plate of the external device. The cover plate has a semi-circular groove along its edge to avoid obstructing the screws used to fix the base plate, thus preventing assembly obstacles. There are four semi-circular grooves, arranged in pairs along a rectangular length.

[0059] The overall dimensions of the superconducting filter shielding box with tuning structure provided by this invention are 46.2mm×30mm×13mm. The specific installation method is as follows: First, the ceramic substrate is glued to the base plate with low-temperature resistant conductive adhesive. After the adhesive dries, the base plate and the bottom shell are fixed. Then, the SMA connector is fixed on both sides of the bottom shell. The SMA connector is welded to the ceramic substrate inside. Next, the cover plate is fixed to the bottom shell. Then, the tuning sleeve is screwed into the 8 mounting holes (threaded holes) of the cover plate. Four of the 8 mounting holes (threaded holes) on both sides use metal tuning posts, and the rest use plastic tuning posts.

[0060] In summary, the present invention provides a superconducting filter shielding box with a tuning structure, comprising a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. The bottom shell has openings at both ends. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are respectively fixed to opposite side walls of the bottom shell, with the end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve contains a metal tuning post, and the remaining portion contains a plastic tuning post. This allows the superconducting filter to operate normally at low temperatures, exhibiting excellent and stable performance. It also features a manual tuning structure, facilitating direct manual adjustment and significantly improving work efficiency. The ceramic substrate is made of ceramic material, which can withstand ultra-low temperatures and has very little thermal deformation. However, it is a fragile material and cannot be drilled. Therefore, it is bonded to the base plate with low-temperature resistant conductive adhesive. At the same time, low-temperature resistant plastic tuning posts and metal tuning posts are designed, which can be selected according to performance requirements.

[0061] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A superconducting filter shielding box with a tuning structure, characterized in that, The device includes a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. The bottom shell has openings at both ends. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are fixed to opposite side walls of the bottom shell, with one end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes, and a portion of each tuning sleeve contains a metal tuning post. The remaining portion is fitted with plastic tuning posts. Both the metal and plastic tuning posts are resistant to low temperatures. The bottom shell is rectangular, and there are eight mounting holes. The mounting holes are arranged in groups of four, spaced apart along the length of the rectangle. The four mounting holes closest to the short side of the rectangle are used to install the metal tuning posts, and the remaining mounting holes are used to install the plastic tuning posts. The mounting holes are threaded holes. The tuning sleeve is an independent structure and can be detachably installed in the mounting holes. The plastic tuning posts are made of PI material and can be used for a long time in an environment of -200℃ to +300℃.

2. The superconducting filter shielding box with tuning structure according to claim 1, characterized in that, The bottom shell has a fixing hole at the middle position of the long side of the rectangle for fixing the bottom shell, bottom plate and cover plate together as a whole.

3. The superconducting filter shielding box with tuning structure according to claim 1, characterized in that, The base plate is provided with strip-shaped grooves for placing ceramic substrates.

4. The superconducting filter shielding box with tuning structure according to claim 1, characterized in that, The cover plate has through holes for fixing to the mounting plate of the external device.

5. A superconducting filter shielding box with a tuning structure according to claim 1, characterized in that, The cover plate has a semi-circular groove at its edge to avoid the screws used to fix the base plate.

6. A superconducting filter shielding box with a tuning structure according to claim 5, characterized in that, The number of semicircular grooves is four, and each pair of semicircular grooves forms a group and is arranged at rectangular intervals along the length direction.

7. A superconducting filter shielding box with a tuning structure according to claim 1, characterized in that, The head and tail of the SMA connector are both made of low-temperature resistant material.

Images