A waveguide interface structure

Abstract

The embodiment of the present invention relates to the field of microwave communication, and discloses a waveguide interface structure. The waveguide interface structure provided by the embodiment of the present invention is used to electrically connect a first waveguide and a second waveguide, and includes: an elastic electrical connection portion, and a fixing portion connected to the electrical connection portion, the fixing portion is used to abut against the end face of the first waveguide, the electrical connection portion is surrounded to form an opening for passing electromagnetic waves, and the electrical connection portion is used to elastically press between the end face of the first waveguide and the end face of the second waveguide, and electrically connect the first waveguide and the second waveguide. The waveguide interface structure provided by the embodiment of the present invention can reduce the structural processing difficulty of the waveguide under the premise of ensuring the normal signal transmission of the waveguide interconnection channel, and is suitable for the use scenario of large gap random tolerance.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of microwave communications, and in particular to a waveguide interface structure. Background Art

[0002] In the microwave frequency band, waveguide has the smallest transmission loss. It is an irreplaceable type of transmission line for improving the power transmission and receiving sensitivity of microwave communication systems. When there are gaps in the waveguide interconnection, strong radiation loss and interference will occur, affecting the normal operation of the system. In the prior art, most waveguide interconnection solutions are single waveguide ports and give priority to ensuring electrical connection, that is, the end faces of the two interconnected waveguide ports are in close contact. In the case of a small interconnection gap, a shielding sealing ring is generally placed around the waveguide port to solve the electromagnetic leakage problem.

[0003] The inventors have found that there are at least the following problems in the prior art: the solutions in the prior art have high requirements for waveguide end face processing and assembly, the waveguide structure processing is difficult, and can only adapt to the situation of tiny interconnection gaps, but cannot adapt to the use scenarios of large gap random tolerances. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a waveguide interface structure that can reduce the structural processing difficulty of the waveguide while ensuring normal signal transmission of the waveguide interconnection channel, and is suitable for use scenarios with large gap random tolerance.

[0005] To solve the above technical problems, an embodiment of the present invention provides a waveguide interface structure for electrically connecting a first waveguide and a second waveguide, comprising: an elastic electrical connection portion, and a fixing portion connected to the electrical connection portion, the fixing portion being used to abut against the end face of the first waveguide, the electrical connection portion being arranged to form an opening for passing electromagnetic waves, the electrical connection portion being used to elastically press between the end face of the first waveguide and the end face of the second waveguide, and electrically connecting the first waveguide and the second waveguide.

[0006] Compared with the prior art, the embodiments of the present invention have the advantages that the electrical connection part is elastic and is used to elastically press between the end faces of the first waveguide and the second waveguide, so that it can be elastically deformed according to the size of the gap between the end faces of the first waveguide and the second waveguide. Moreover, since the electrical connection part is also used to electrically connect the first waveguide and the second waveguide, the electrical connection part can always make up the gap between the first waveguide and the second waveguide, thereby solving the problem of non-coplanarity of multiple waveguide port interconnection, avoiding the leakage of electromagnetic waves, ensuring the normal signal transmission of the waveguide interconnection channel, and reducing the influence of the cumulative tolerance on the waveguide interconnection. The processing accuracy and assembly requirements of each waveguide end face are low, and each waveguide port channel can be processed independently, which reduces the difficulty of structural processing of the waveguide and can be suitable for use scenarios with large gap random tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0008] Figure 1 is a structural schematic diagram of a waveguide interface structure provided by the first embodiment of the present invention;

[0009] Figure 2 is a structural schematic diagram of a waveguide interface structure provided by a first embodiment of the present invention applied to a waveguide;

[0010] Figure 3 is an assembly diagram of a waveguide interface structure provided by a first embodiment of the present invention applied to a waveguide;

[0011] Figure 4 is another structural schematic diagram of the waveguide interface structure provided by the first embodiment of the present invention;

[0012] Figure 5 is a structural schematic diagram of another waveguide interface structure provided by the first embodiment of the present invention applied to a waveguide;

[0013] Figure 6 is an assembly diagram of another waveguide interface structure provided by the first embodiment of the present invention applied to a waveguide;

[0014] Figure 7 is another structural schematic diagram of the waveguide interface structure provided by the first embodiment of the present invention;

[0015] Figure 8 is a structural schematic diagram of another waveguide interface structure provided by the first embodiment of the present invention applied to a waveguide;

[0016] Fig. 9 is an assembly diagram of another waveguide interface structure provided by the first embodiment of the present invention applied to a waveguide;

[0017] Fig.10 is a structural schematic diagram of a waveguide interface structure provided by a second embodiment of the present invention;

[0018] Fig.11 is a structural schematic diagram of a waveguide interface structure provided by a second embodiment of the present invention applied to a waveguide;

[0019] Fig.12 It is an assembly diagram of another waveguide interface structure provided by the first embodiment of the present invention applied to a waveguide. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the following will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that in the various embodiments of the present invention, many technical details are provided in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can be implemented.

[0021] See also Figures 1 to 9 The first embodiment of the present invention relates to a waveguide interface structure 100, which is used to electrically connect a first waveguide 10 and a second waveguide 20. The core of this embodiment is that the waveguide interface structure 100 includes: an elastic electrical connection part 11, and a fixing part 12 connected to the electrical connection part 11, the fixing part 12 is used to abut against the end face of the first waveguide 10, the electrical connection part 11 is surrounded to form an opening 30 for passing electromagnetic waves, and the electrical connection part 11 is used to elastically press between the end face of the first waveguide 10 and the end face of the second waveguide 20, and electrically connect the first waveguide 10 and the second waveguide 20.

[0022] Since the electrical connection portion 11 is elastic and is used for elastically pressing between the end face of the first waveguide 10 and the end face of the second waveguide 20, it can be elastically deformed according to the size of the gap between the end face of the first waveguide 10 and the end face of the second waveguide 20. Since the electrical connection portion 11 is also used for electrically connecting the first waveguide 10 and the second waveguide 20, the electrical connection portion 11 can always absorb the gap between the first waveguide 10 and the second waveguide 20 (that is, the electrical connection portion 11 is surrounded to form an opening 30 for passing electromagnetic waves, and blocks the leakage of electromagnetic waves at the gap between the first waveguide 10 and the second waveguide 20, and makes up for the gap between the first waveguide 10 and the second waveguide 20), the problem of non-coplanarity of multiple waveguide port interconnection is solved, the leakage of electromagnetic waves is avoided, and the normal signal transmission of the waveguide interconnection channel is ensured, so that the cumulative tolerance has less influence on the waveguide interconnection, the processing accuracy and assembly requirements of each waveguide end face are low, and each waveguide port channel can be processed independently, which reduces the difficulty of structural processing of the waveguide and can be suitable for use scenarios with large gap random tolerance.

[0023] At the same time, the scheme in the prior art that prioritizes the connection of the waveguide ports and then considers the waterproofing and heat dissipation of the casing limits the system architecture scheme of the whole machine, for example: the stacking order of the whole machine structure, the number of waveguide ports of the whole machine, the position of the heat sink, the size of the waterproof sealing ring, etc. The embodiment of the present invention connects the first waveguide 10 and the second waveguide 20 through the above-mentioned waveguide interface structure 100, which can be elastically deformed according to the size of the gap between the waveguides to absorb waveguide gaps of different sizes, so that there is no need to prioritize the connection of the waveguide ports, and the heat sink can be designed on the outside of the whole machine and the antenna feed to achieve the best heat dissipation effect, thereby effectively reducing the volume of the whole machine and reducing the cost. In addition, it ensures that the waterproof surface of the whole machine structure is in priority contact, improves the sealing reliability of the whole machine, improves the mechanical strength of the whole machine and the antenna feed, and reduces the reliability risk of the field and the subsequent maintenance cost.

[0024] The implementation details of the waveguide interface structure 100 of this embodiment are described in detail below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0025] In practical applications, the electrical connection portion 11 may include: an annular main body portion 111 connected to the fixing portion 12, and a plurality of spring sheets 112 arranged on the annular main body portion 111 at intervals from each other, the annular main body portion 111 is used to fit the end face of the first waveguide 10, the plurality of spring sheets 112 are used to abut the end face of the second waveguide 20, the plurality of spring sheets 112 extend in a direction away from the annular main body portion 111 and together form an opening 30, the opening 30 is arranged opposite to the central through hole of the annular main body portion 111 to facilitate the transmission of electromagnetic waves, the plurality of spring sheets 112 are elastically pressed between the end face of the first waveguide 10 and the end face of the second waveguide 20, and the first waveguide 10 and the second waveguide 20 are electrically connected, so that the large-surface contact is converted into a multi-point contact, which effectively avoids the problem of poor contact over a large area and reduces the processing accuracy and assembly requirements of the spring sheets 112.

[0026] In order to meet the signal transmission requirements, the size of the opening 30 changes according to the size of the waveguide interconnection gap and the deformation of the spring 112, as long as the size of the opening 30 is always guaranteed to match the electrical performance of the waveguide size. The waveguide interface structure 100 can be applied to rectangular waveguides, circular waveguides, ridge waveguides and other application scenarios. The spring 112 scheme is a broadband design, and the operating frequency range is consistent with the waveguide operating frequency range. Different center openings 30 are designed according to different waveguide types. For example, for rectangular waveguides, the opening 30 can be rectangular, for circular waveguides, the opening 30 can be circular; for ridge waveguides, the opening 30 can be ridge-shaped.

[0027] The material of the annular body 111 may be a conductive material, such as metal, and the material of the spring 112 may be a conductive material with elasticity, such as metal. Of course, the annular body 111 and the spring 112 may also be made of conductive material only on the surface, and insulating material (such as plastic) inside, as long as the first waveguide 10 and the second waveguide 20 can be electrically connected via the annular body 111 and the spring 112.

[0028] In practical applications, the spring sheet 112 can be folded after stamping or etching, and the cylindrical isolating portion 114 can be made by first bending a flat metal sheet into a cylindrical shape and then welding it. In order to reduce the difficulty of processing, the spring sheet 112 and the cylindrical isolating portion 114 can be processed separately and then welded together. Since the material cost of the waveguide interface structure 100 of this embodiment is low and easy to process, it can be mass-produced through a mold, and compared with a conductive rubber ring, it has a cost advantage.

[0029] In this embodiment, each spring piece 112 may include: a first extension portion 112a connected to the annular main body portion 111, and a second extension portion 112b bent and extended from the first extension portion 112a, the second extension portion 112b is used to support the end face of the second waveguide 20. Since the second extension portion 112b is bent and extended from the first extension portion 112a, the intersection of the first extension portion 112a and the second extension portion 112b is more likely to undergo elastic deformation, thereby being able to better adapt to gaps of different sizes between the first waveguide 10 and the second waveguide 20.

[0030] The first extension portion 112a may be disposed on the inner edge 111a of the annular main body 111, or on the outer edge 111b of the annular main body 111, or a portion of the first extension portion 112a may be disposed on the inner edge 111a of the annular main body 111, and another portion of the first extension portion 112a may be disposed on the outer edge 111b of the annular main body 111. Of course, the first extension portion 112a may also be disposed not at the edge of the annular main body 111, but between the inner edge 111a and the outer edge 111b, which is not limited here.

[0031] For each spring piece 112, the second extension portion 112b and the first extension portion 112a can be arranged at an obtuse angle, an acute angle or a right angle (that is, the angle between the second extension portion 112b and the first extension portion 112a is an obtuse angle, an acute angle or a right angle), and the intersection of the second extension portion 112b and the first extension portion 112a is used to abut the end surface of the second waveguide 20, or, the end of the second extension portion 112b away from the first extension portion 112a is used to abut the end surface of the second waveguide 20.

[0032] For all the spring pieces 112, the same setting method can be adopted, for example, each second extension portion 112b is set at an obtuse angle, an acute angle or a right angle with the corresponding first extension portion 112a; or a combination of spring pieces 112 with multiple different settings can be adopted, and the setting method of each spring piece 112 can be any of the above-mentioned methods, for example, a part of the second extension portion 112b is set at an obtuse angle with the corresponding first extension portion 112a, and another part of the second extension portion 112b is set at an acute angle with the corresponding first extension portion 112a.

[0033] To make it easier to understand, here are two examples:

[0034] like Figure 1 , Figure 2 , Figure 3 As shown, the first extension portion 112a is arranged at the inner edge 111a of the annular main body portion 111, and the second extension portion 112b is arranged at an obtuse angle with the first extension portion 112a. The intersection of the second extension portion 112b and the first extension portion 112a is used to abut the end surface of the first waveguide 10, and the end of the second extension portion 112b away from the first extension portion 112a is used to abut the end surface of the second waveguide 20.

[0035] like Figure 4 , Figure 5 , Figure 6 As shown, a portion of the first extension portion 112a is arranged on the inner edge 111a of the annular main body portion 111, and another portion of the first extension portion 112a is arranged on the outer edge 111b of the annular main body portion 111, and the second extension portion 112b and the first extension portion 112a are arranged at an acute angle, and the intersection of the second extension portion 112b and the first extension portion 112a is used to abut the end surface of the first waveguide 10, and the end of the second extension portion 112b away from the first extension portion 112a is used to abut the end surface of the second waveguide 20.

[0036] like Figure 7 , Figure 8 , Fig. 9 As shown, the first extension portions 112a are all arranged on the inner edge 111a of the annular main body portion 111, and a portion of the second extension portions 112b is arranged at an obtuse angle with the corresponding first extension portion 112a, and another portion of the second extension portions 112b is arranged at an acute angle with the corresponding first extension portion 112a. The intersection of the second extension portion 112b and the first extension portion 112a is used to abut the end surface of the first waveguide 10, and the end of the second extension portion 112b away from the first extension portion 112a is used to abut the end surface of the second waveguide 20.

[0037] In order to ensure reliable contact and electrical performance within the tolerance range, the finger width, finger spacing, finger length and shape of the spring 112 are designed through simulation. The finger width needs to take into account the material elasticity and deformation (the smaller the finger width, the better the elasticity) to ensure good contact under different gap sizes; the finger spacing meets the cutoff waveguide theory and is reasonably designed according to the anti-leakage goal; the finger length and shape determine the tolerance absorption capacity (the adaptability to the gap size between the waveguides) and electrical performance.

[0038] Specifically, if the above-mentioned waveguide interface structure 100 is suitable for a waveguide that transmits electromagnetic waves with a first wavelength (the opening 30 is used to pass electromagnetic waves with a first wavelength), that is, the first waveguide 10 and the second waveguide 20 are used to transmit electromagnetic waves with a first wavelength, the finger width determines the contact surface length between the spring piece 112 and the waveguide. In order to ensure reliable electrical contact, along the arrangement direction of the spring pieces 112, the width w (that is, the finger width) of the spring pieces 112 can be less than 0.2 times the first wavelength; according to the anti-leakage goal, using the cutoff waveguide theory, along the arrangement direction of the spring pieces 112, the spacing v between adjacent spring pieces 112 (that is, the finger spacing) can be less than 0.05 times the first wavelength; in order to ensure sufficient elasticity, the thickness of the spring piece 112 is generally less than 0.2 mm.

[0039] Optionally, in practical applications, a mounting hole 13 may be provided on the fixing portion 12 , and a screw may be inserted into the mounting hole 13 and fixed to one end of the waveguide (ie, the first waveguide 10 ), thereby achieving installation of the waveguide interface structure 100 .

[0040] The waveguide interface structure 100 provided in this embodiment has a gap absorption capacity of 0 to 2 mm, that is, when the distance between the end face of the first waveguide 10 and the end face of the second waveguide 20 is within 2 mm, the waveguide interface structure 100 can achieve good electrical connection and prevent electromagnetic wave leakage.

[0041] The second embodiment of the present invention relates to a waveguide interface structure 200. Fig.10 , Fig.11 , Fig.12As shown, the second embodiment is substantially the same as the first embodiment, and the main difference is that: in the first embodiment, the electrical connection part 11 includes: an annular main body part 111 connected to the fixing part 12 and used to fit the end face of the first waveguide 10, and a plurality of spring pieces 112 arranged on the annular main body part 111 at intervals, the plurality of spring pieces 112 extend in a direction away from the annular main body part 111 and together form an opening 30, and the plurality of spring pieces 112 are used to abut the end face of the second waveguide 20. In the second embodiment of the present invention, the electrical connection part 11 includes: a plurality of spring pieces 113 arranged on the fixing part 12 at intervals, and a cylindrical isolating part 114 connected to the plurality of spring pieces 113; the spring pieces 113 are used to abut the end face of the second waveguide 20, the cylindrical isolating part 114 is arranged to form the opening 30, and the cylindrical isolating part 114 is used to contact the inner wall of the first waveguide 10. In addition, the technical effects of this embodiment are similar to those of the first embodiment, and will not be repeated here.

[0042] That is to say, in the first embodiment, the annular main body 111 and the plurality of spring pieces 112 are respectively used to abut the end faces of the first waveguide 10 and the second waveguide 20 to achieve elastic connection and electrical connection between the first waveguide 10 and the second waveguide 20; while in the second embodiment, the fixing portion 12 and the plurality of spring pieces 113 are respectively used to abut the end faces of the first waveguide 10 and the second waveguide 20 to achieve elastic connection between the first waveguide 10 and the second waveguide 20, and the cylindrical isolating portion 114 is connected to the plurality of spring pieces 113 and contacts the inner wall of the first waveguide 10 to achieve electrical connection between the first waveguide 10 and the second waveguide 20.

[0043] The implementation details of the waveguide interface structure 200 of this embodiment are described in detail below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0044] Specifically, the cylindrical isolation portion 114 may include: a cylindrical wall 114a connected to a plurality of spring pieces 113, and a plurality of abutting portions 114b connected to the cylindrical wall 114a, the free end of the abutting portion 114b being used to abut against the inner wall of the first waveguide 10, that is, the cylindrical isolation portion 114 has two opposite end edges (edges at both ends) in its axial direction, the spring piece 113 is connected to one of the end edges (the top edge), and the abutting portion 114b is connected to the other end edge (the bottom edge), and by converting the large-surface contact into multi-point contact, the problem of poor contact over a large area is effectively avoided, and the processing accuracy and assembly requirements of the abutting portion 114b are reduced.

[0045] Furthermore, the abutment portion 114b extends from the end edge or outer wall of the cylinder wall 114a toward a direction away from the internal space of the cylinder wall 114a, so that when the waveguide interface structure 200 connects the first waveguide 10 and the second waveguide 20, the cylinder wall 114a extends into the waveguide opening of the first waveguide 10, the abutment portion 114b abuts against the inner wall of the first waveguide 10, the spring piece 113 abuts against the end face of the second waveguide 20, and the spring piece 113 is connected to the abutment portion 114b via the cylinder wall 114a, thereby realizing the electrical connection between the first waveguide 10 and the second waveguide 20, and when the size of the interconnection gap between the first waveguide 10 and the second waveguide 20 changes, the abutment portion 114b can always maintain contact with the inner wall of the first waveguide 10 by sliding on the inner wall of the first waveguide 10, and at the same time, the electromagnetic waves in the electromagnetic wave transmission channel are isolated by the cylinder wall 114a and the abutment portion 114b, thereby avoiding the problem of electromagnetic wave leakage.

[0046] In this embodiment, each spring piece 113 includes: a first extension portion 113a connected to the fixing portion 12, a second extension portion 113b bent and extended from the first extension portion 113a, and a third extension portion 113c bent and extended from the second extension portion 113b, the third extension portion 113c is connected to the cylindrical isolation portion 114, and the third extension portion 113c is used to abut the end face of the second waveguide 20, specifically, the third extension portion 113c is connected to one end edge (top edge) of the cylinder wall 114a, and the abutting portion 114b is connected to the other end edge (bottom edge). Since the second extension portion 113b is bent and extended from the first extension portion 113a, the intersection of the first extension portion 113a and the second extension portion 113b is more likely to undergo elastic deformation, so that it can better adapt to the gaps of different sizes between the first waveguide 10 and the second waveguide 20.

[0047] It is understandable that the spring 113 may also be other elastic structures, such as a spring, etc., as long as it can be elastically pressed between the end surface of the first waveguide 10 and the end surface of the second waveguide 20, and is not limited here.

[0048] The material, manufacturing method and size of the abutment portion 114b are similar to those of the spring piece 112 in the first embodiment. For example, the abutment portion 114b can be made of metal material, which can be stamped or etched and then bent and welded into shape (the barrel wall 114a and the abutment portion 114b are formed together), or the abutment portion 114b can be welded to the barrel wall 114a using a welding process. If the opening 30 is used to pass electromagnetic waves having a first wavelength, in order to ensure reliable electrical contact, along the arrangement direction of the abutment portion 114b, the width w (i.e., the finger width) of the abutment portion 114b can be less than 0.2 times the first wavelength; according to the anti-leakage goal, using the cutoff waveguide theory, along the arrangement direction of the abutment portion 114b, the spacing v (i.e., the finger spacing) between adjacent abutment portions 114b can be less than 0.05 times the first wavelength, and the settings of other dimensions are not repeated here.

[0049] In practical applications, the third extension portion 113c and the cylindrical isolation portion 114 (specifically, the cylindrical wall 114a and the abutting portion 114b) are made of conductive materials, such as metal, so that the first waveguide 10 and the second waveguide 20 are electrically connected via the third extension portion 113c, the cylindrical wall 114a and the abutting portion 114b. Of course, the third extension portion 113c, the cylindrical wall 114a and the abutting portion 114b may also be made of conductive materials on the surface and insulating materials (such as plastic) inside, as long as they can achieve conductivity.

[0050] The waveguide interface structure 200 provided in this embodiment has a gap absorption capacity greater than 2 mm, that is, when the distance between the end face of the first waveguide 10 and the end face of the second waveguide 20 is greater than 2 mm, the waveguide interface structure 200 can achieve good electrical connection and prevent electromagnetic wave leakage.

[0051] Since the first embodiment corresponds to the present embodiment, the present embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in the present embodiment, and the technical effects that can be achieved in the first embodiment can also be achieved in the present embodiment. In order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in the present embodiment can also be applied in the second embodiment.

[0052] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A waveguide interface structure for electrically connecting a first waveguide and a second waveguide, characterized in that: include: An elastic electrical connection portion and a fixing portion connected to the electrical connection portion, wherein the fixing portion is used to abut against the end face of the first waveguide, the electrical connection portion is surrounded to form an opening for passing electromagnetic waves, the electrical connection portion is used to elastically press between the end face of the first waveguide and the end face of the second waveguide and electrically connect the first waveguide and the second waveguide, and the size of the opening matches the size of the waveguide in electrical performance; The electrical connection part comprises: a plurality of spring sheets arranged on the fixing part at intervals from each other, and a cylindrical isolating part connected to the plurality of spring sheets; The spring sheet is used to abut against the end surface of the second waveguide, the cylindrical isolating portion is arranged around the opening, and the cylindrical isolating portion is used to contact the inner wall of the first waveguide; The cylindrical isolating portion includes: a cylindrical wall connected to the plurality of elastic sheets, and a plurality of abutting portions connected to the cylindrical wall, wherein the abutting portions are used to abut against an inner wall of the first waveguide.

2. The waveguide interface structure according to claim 1, characterized in that: The abutting portion extends from the end edge or the outer wall surface of the tube wall toward a direction away from the inner space of the tube wall.

3. The waveguide interface structure according to claim 2, characterized in that: The opening is used to pass electromagnetic waves having a first wavelength. In the arrangement direction of the spring pieces, the width of the abutment portion is less than 0.2 times the first wavelength, and the spacing between adjacent abutment portions is less than 0.05 times the first wavelength.

4. The waveguide interface structure according to claim 1, characterized in that: Each of the spring pieces includes: a first extension portion connected to the fixing portion, a second extension portion extending and bending from the first extension portion, and a third extension portion extending and bending from the second extension portion, the third extension portion is connected to the cylindrical isolation portion, and the third extension portion is used to abut the end face of the second waveguide.

5. The waveguide interface structure according to claim 4, characterized in that: The third extension portion and the cylindrical isolation portion are made of conductive materials.

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