CN114976552B

CN114976552B - A four-cavity coaxial waveguide converter

Info

Publication number: CN114976552B
Application number: CN202210702571.4A
Authority: CN
Inventors: 王健
Original assignee: Xi'an Goldwave S&t Co ltd
Current assignee: Xi'an Goldwave S&t Co ltd
Filing date: 2022-06-21
Publication date: 2025-12-12
Anticipated expiration: 2042-06-21

Abstract

The invention discloses a high-performance four-cavity coaxial waveguide converter, which is characterized in that four identical through holes are formed in a coaxial end shell, four identical insulators and four identical inner conductors are sequentially arranged in the coaxial end shell, four identical rectangular waveguide cavities are formed in the waveguide end shell, identical rectangular step matching blocks are respectively arranged in the four rectangular waveguide cavities, the coaxial end shell is connected with the waveguide end shell 4 through soldering, one end of the inner conductor penetrates through the through holes of the insulator at the same shaft end and stretches into small holes of the waveguide end shell matching blocks, so that conversion between a waveguide and a coaxial is realized, and the other end stretches out of the insulator to be connected with microstrip lines, so that microwave signals are transmitted. The invention adopts the special four-cavity waveguide converter during the test, thereby improving the test efficiency.

Description

Four-cavity coaxial waveguide converter

Technical Field

The invention relates to the field of converters, in particular to a high-performance four-cavity coaxial waveguide converter.

Background

The coaxial waveguide converter can realize the mutual conversion between the waveguide and the coaxial product, and realize the interconnection between the whole equipment, so that the coaxial waveguide converter is widely applied to occasions needing to transmit electromagnetic signals and energy. Along with the development of miniaturization and light weight of the whole equipment, market demands for miniaturization and light weight of the coaxial waveguide converter are also increasing.

Along with the wide application of the domestic and foreign phase control technology, a high requirement is put on the phase consistency of the coaxial waveguide converter, namely, the phase difference of any two groups in the coaxial waveguide converter is required to be as small as possible. The voltage standing wave ratio is a reflection of the uniformity degree of the transmission characteristic impedance of the coaxial waveguide converter and the reflection degree of the transmission signal, and simultaneously reflects the matching degree of the coaxial waveguide converter and the system in the electronic system, so that the expected value of the voltage standing wave ratio of the high-performance coaxial waveguide converter is smaller and better.

At present, although few coaxial waveguide converters on the market can realize the requirements of good phase consistency and low voltage standing wave ratio, the coaxial waveguide converter is generally in a conversion form of a single waveguide cavity and a single coaxial part, and the coaxial waveguide converter is limited to be miniaturized and light because the waveguides are connected by adopting a flange plate, and the flange plate is provided with a positioning pin besides a connecting hole so as to facilitate the alignment of the waveguide cavity and the waveguide cavity. For the integrated coaxial waveguide converter, because the multiple paths are integrated together, the structure is relatively complex, the phase consistency of the multiple paths of transmission is difficult to realize, and in addition, when multiple paths of testing are performed, the single-path tool is adopted to test the multiple paths of the coaxial waveguide converter one by one, so that the testing efficiency is low, and the testing result and multiple paths of the coaxial waveguide converter are simultaneously connected in the system to have certain deviation. Under the background, a high-performance coaxial waveguide converter is urgently needed to be provided, so that the requirements of miniaturization, light weight, good phase consistency and low voltage standing wave ratio can be met, and the requirements of the current market are met.

Disclosure of Invention

The invention aims to provide a high-performance four-cavity coaxial waveguide converter so as to solve the technical problems.

The invention adopts the following technical scheme for realizing the purposes:

The utility model provides a high performance four-chamber coaxial waveguide converter, includes inner conductor, insulator, coaxial end shell, waveguide end shell, be provided with four the same through-holes in the coaxial end shell, be equipped with four the same insulators and four the same inner conductor in proper order, be provided with four the same rectangular waveguide chamber in the waveguide end shell, be provided with an identical rectangular ladder matching block in four rectangular waveguide chamber respectively, coaxial end shell passes through soldering with waveguide end shell 4 and is connected, the through-hole that inner conductor one end passed with the axle head insulator stretches into in the aperture of waveguide end shell matching block, realizes waveguide and coaxial conversion, and the other end stretches out insulator part and can be connected with the microstrip line to realize microwave signal's transmission.

Preferably, the inner conductor is connected with the coaxial end shell and the insulator through encapsulation.

Preferably, the inner conductor is in a stepped shaft shape, the smaller outer circle at the front end of the inner conductor is pressed into the rectangular matching block, and the inner conductor is pressed by a special coaxial positioning clamp during pressing, so that coaxiality of the inner conductor and an inner hole of a coaxial end shell is ensured, the inner conductor is not deformed due to overvoltage, the length of the inner conductor extending out of the matching block is not consistent due to the fact that the inner conductor is not pressed in place, and factors affecting voltage standing wave ratio and phase consistency are further eliminated. The end face of the shaft shoulder of the inner conductor is contacted with the right end face of the matching block, and a groove for accommodating pouring sealant is formed in the thicker outer circle of the inner conductor.

Preferably, the insulator is cylindrical, the insulator is provided with a through hole for loading the inner conductor, the outer circle of the insulator penetrates through the through hole of the coaxial end shell, the left end face of the insulator is in contact with the right end face of the matching block, the left end face and the right end face of the insulator are respectively flush with the left end face and the right end face of the coaxial end shell, the insulator is provided with two filling and sealing through holes in the direction perpendicular to the axis, and the axis of the filling and sealing hole is aligned with the center of the filling and sealing groove of the inner conductor.

Preferably, the coaxial end shell is made of an aluminum alloy material, the left end of the coaxial end shell is a rectangular boss and is used for being filled in a rectangular cavity at the right end of the waveguide end shell and soldered with the rectangular cavity, the right side of the rectangular boss of the coaxial end shell is provided with two double-connection bodies, the double-connection bodies are round-angle rectangles, two round through holes are respectively arranged in the double-connection bodies, the axes of the through holes and the central line of the waveguide cavity are in the same line, the two double-connection bodies are connected by using reinforcing ribs, four filling and sealing through holes are respectively arranged in the directions perpendicular to the axes of the four through holes, and the axes of the filling and sealing holes are aligned with the axes of the insulator filling and sealing holes and the center of the inner conductor filling and sealing groove.

Preferably, the waveguide end shell is made of aluminum alloy, the left end of the waveguide end shell is a round-angle rectangular flange, 6 connecting holes are formed in the flange at the middle positions close to four corners and long sides, the connecting holes are counter bores and are used for connecting the four-cavity coaxial waveguide converter with the mounting plate, four rectangular waveguide cavities are formed in the flange, the long sides of the waveguide cavities are parallel to the long sides of the flange 7, the short sides of the waveguide cavities are parallel to the short sides of the flange, positioning pins are respectively arranged at the opposite corners of the long sides of the waveguide cavities and are inserted into the opposite-end positioning holes when the four-cavity waveguide is connected with the opposite-end waveguide cavities, the waveguide end shell integrates the four waveguide cavities in a shell, shares the waveguide walls and the waveguide flange, and therefore the volume is reduced, and the weight is reduced.

Preferably, a rectangular stepped matching block is arranged in each of the four rectangular waveguide cavities, each of the four matching blocks is provided with a small hole, the small holes are used for being connected with an inner conductor at the coaxial end, so that conversion between the waveguide and the coaxial is realized, the right end of the flange plate is a round-angle rectangular shell, a round-angle rectangular hole is formed in the right end of the round-angle rectangular shell and is used for being filled with a round-angle rectangular shell boss at the same shaft end, two opposite soldering holes are formed in the round-angle rectangular hole wall, soldering tin flows in from one soldering hole and flows out from the other soldering hole during soldering, and therefore soldering tin is filled in the joint of the coaxial end shell and the rectangular end shell, and the reliability of connection of the two shells is ensured. The waveguide end shell and the coaxial end shell adopt an upper clamping plate special for avoiding pins and a lower clamping plate clamp for loading the coaxial end into a part of the coaxial end shell during soldering, and the upper clamping plate and the lower clamping plate are locked by locking screws, so that the consistency of the shell length during welding is ensured.

Compared with the prior art, the invention has the advantages that the structure is simple, and the invention can be realized by adopting a conventional process method. The aluminum alloy material is adopted, so that the weight of the product is reduced. The four waveguide cavities are integrated in the shell, and the waveguide wall and the waveguide flange are shared, so that the volume is reduced, and the weight is reduced. The two integrated shells are integrated together, and the two integrated shells are connected by the reinforcing ribs, so that the product has certain strength, the volume and the weight are reduced. The coaxial end adopts a potting structure, so that the influence of the barb structure and the spot riveting structure on the uniformity of the length and the outer diameter of the insulating medium is avoided, and the factors influencing the voltage standing wave ratio and the phase uniformity are eliminated. The coaxial positioning clamp is adopted, so that the phenomena of non-coaxiality, press-fit deformation, press-fit failure and the like of the inner conductor and the shell are avoided, and the factors affecting the voltage standing wave ratio and the phase consistency are further eliminated. The invention adopts the special shell welding positioning clamp, ensures the consistency of the shell length, and eliminates the influence of inconsistent length on the phase. The invention adopts the special four-cavity waveguide converter during the test, thereby improving the test efficiency. According to the invention, the waveguide converter, the product and the coaxial end test tool are connected together by adopting the test frame, so that the influence of excessive connection references on the test phase consistency in the test process is avoided.

Drawings

Fig. 1 is a front view of the present invention.

Fig. 2 is a left side view of the present invention.

Fig. 3 is a right side view of the present invention.

Fig. 4 is a top view of the present invention.

In the figure, the soldering hole A is a soldering hole B, the soldering hole C is a filling and sealing part, the filling and sealing part is a 1-inner conductor, a 2-insulator, a 3-coaxial end shell, a 4-waveguide end shell, a 5-waveguide cavity, a 6-matching block, a 7-flange plate, an 8-locating pin, a 9-counter bore, a 10-double connection body and an 11-reinforcing rib.

Detailed Description

The invention is described in further detail below with reference to the drawings and the specific examples.

As shown in the figure, the high-performance four-cavity coaxial waveguide converter comprises an inner conductor 1, an insulator 2, a coaxial end shell 3 and a waveguide end shell 4, wherein four identical through holes are formed in the coaxial end shell 3, and four identical insulators 2 and four identical inner conductors 1 are sequentially arranged in the coaxial end shell 3. Four identical rectangular waveguide cavities 5 are arranged in the waveguide end shell 4, and identical rectangular step matching blocks 6 are respectively arranged in the four rectangular waveguide cavities 5. The coaxial end shell 3 is connected with the waveguide end shell 4 through soldering, one end of the inner conductor 1 penetrates through a through hole of the coaxial end insulator 2 and stretches into a small hole of a matching block 6 of the waveguide end shell 4, so that conversion between a waveguide and a coaxial is realized, the part of the other end stretching out of the insulator can be connected with a microstrip line, and transmission of microwave signals is realized, and the inner conductor 1 is connected with the coaxial end shell 3 and the insulator 2 through encapsulation.

The inner conductor 1 is in a stepped shaft shape, the smaller outer circle at the front end of the inner conductor 1 is pressed into the rectangular matching block 6, and the inner conductor 1 adopts a special coaxial positioning clamp during the press fit, so that the coaxiality of the inner conductor 1 and the inner hole of the coaxial end shell 3 is ensured, the inner conductor 1 is not deformed due to overvoltage, the length of the inner conductor 1 extending out of the matching block 6, which is caused by the fact that the press fit is not in place, is not consistent, and the factors affecting the voltage standing wave ratio and the phase consistency are further eliminated. The shaft shoulder end face of the inner conductor 1 is contacted with the right end face of the matching block 6. The outer circle of the inner conductor 1 is provided with a groove for accommodating pouring sealant, the inner conductor 1 penetrates through the insulator 2 and extends out for a certain length, and the extending end of the inner conductor 1 can be connected with a microstrip line, so that microwave signal transmission is realized.

The insulator 2 is cylindrical, the insulator 2 is provided with the through-hole that inner conductor 1 was packed into, the through-hole of coaxial end shell 3 is passed to the excircle of insulator 2, insulator 2 left end face and the contact of matching block 6 right-hand member face, insulator 2 left and right terminal surface respectively with coaxial end shell 3 left and right terminal surface parallel and level, insulator 2 is provided with two embedment through-holes C in perpendicular to axis direction, embedment hole C's axis and inner conductor 1 encapsulating groove's center alignment.

The coaxial end shell 3 is made of an aluminum alloy material, and the left end of the coaxial end shell 3 is a rectangular boss and is used for being placed into a rectangular cavity at the right end of the waveguide end shell 4 and soldered with the rectangular cavity. The right side of the rectangular boss of the coaxial end shell 3 is provided with two double-connected bodies 10, the double-connected bodies 10 are round-corner rectangles, two round through holes are respectively formed in the double-connected bodies 10, and the axes of the through holes and the central line of the waveguide cavity 5 are on the same line. The two double-connected bodies 10 are connected by the reinforcing ribs 11, the two double-connected bodies 10 are respectively provided with four filling and sealing through holes C in the direction perpendicular to the axis of the four through holes, and the axis of each filling and sealing hole C is aligned with the axis of each filling and sealing hole C of the insulator 2 and the center of each filling and sealing groove of the inner conductor 1.

The coaxial end adopts a potting structure, so that the thickness of the stressed local outer diameter is prevented from becoming thicker when the tiny insulator 2 is pressed into the barb structure, and the stressed extension of the tiny insulator 2 near the point riveting part of the point riveting structure is also prevented, the uniformity of insulating media is ensured, the influence of the non-uniformity of the media on the voltage standing wave ratio is eliminated, the uniformity of the physical length of the coaxial waveguide converter is also ensured, and the influence of the non-uniformity of the length on the phase is also eliminated.

The waveguide end shell 4 is made of an aluminum alloy material, the left end of the waveguide end shell 4 is provided with a round-corner rectangular flange 7, the flange 7 is provided with 6 connecting holes at the middle positions close to four corners and long sides, and the connecting holes are counter bores 9 and are used for connecting the four-cavity coaxial waveguide converter with a mounting plate. Four rectangular waveguide cavities 5 are arranged on the flange plate 7, the long sides of the waveguide cavities 5 are parallel to the long sides of the flange plate 7, and the short sides of the waveguide cavities are parallel to the short sides of the flange plate 7. And two opposite angles of the two sides of the long side of the waveguide cavity 5 are respectively provided with a positioning pin 8, and the positioning pins are used for being inserted into the positioning holes of the opposite ends when the four-cavity waveguide is connected with the opposite waveguide cavity 5, so that the effect of quickly aligning the waveguide cavities 5 to be connected at the two ends is achieved. The waveguide end housing 4 integrates four waveguide cavities 5 into one housing, sharing waveguide walls and waveguide flanges 7, thereby reducing volume and weight.

The four rectangular waveguide cavities 5 are internally provided with rectangular stepped matching blocks 6 respectively, the four matching blocks 6 are provided with small holes respectively, and the small holes are used for being connected with the coaxial end inner conductor 1, so that the conversion between the waveguide and the coaxial is realized. The right-hand member of ring flange 7 is the fillet rectangle casing, fillet rectangle casing right-hand member is provided with the fillet rectangular hole for pack into the fillet rectangle casing boss of homopolar end. The fillet rectangular hole wall department is provided with two relative tin soldering hole A, tin soldering hole B, and soldering tin flows in from A end hole when the welding, flows out from B end hole to be full of soldering tin in coaxial end shell 3 and rectangular end shell 4 junction, guarantee the reliability of two casing connections. The waveguide end shell 4 and the coaxial end shell 3 adopt an upper clamping plate special for avoiding pins and a lower clamping plate clamp for loading the coaxial end into a part of the coaxial end during soldering, and the upper clamping plate and the lower clamping plate are locked by locking screws, so that the consistency of the shell length during welding is ensured.

The four-cavity coaxial waveguide converter simulates the use condition of a user during testing, a special four-cavity waveguide converter is adopted, the waveguide cavity 5 of the four-cavity coaxial waveguide converter is opposite to the waveguide cavity of the special converter and is connected with the waveguide cavity of the special converter through the flange 7, then the middle opening can avoid the test frame of the product of the invention to connect with the testing converter, one end of the testing frame is connected with the microstrip end of the product of the invention, and the other end of the testing frame can be connected with the testing tool connected with the vector network analysis for testing.

The installation method of the invention is that the coaxial end shell 3 is arranged in the waveguide end shell 4, the two shells are clamped between an upper clamping plate which is specially used for avoiding pins and a lower clamping plate which can be used for arranging the coaxial end in a part, and the upper clamping plate and the lower clamping plate are locked by locking screws, so that the consistency of the lengths of the shells during welding is ensured. During welding, soldering tin flows in from the hole at the end A and flows out from the hole at the end B, so that the soldering tin is guaranteed to infiltrate the whole welding part, and the welding reliability is guaranteed. And then the coaxial positioning clamp is arranged in the through hole of the coaxial end shell 3, the inner conductor 1 is pressed into the small hole of the matching block 6 through the coaxial positioning clamp, the coaxial positioning clamp is taken out after the press fit is finished, the coaxial end insulator 2 is arranged in the coaxial end shell 3, the insulator is aligned with the filling hole C of the shell, filling is carried out, and the pouring sealant flows out from one end of the filling hole and the other end of the filling hole. The part of the inner conductor 1 extending out of the insulator 2 can be connected with a microstrip line, so that the transmission of microwave signals is realized. The waveguide ends are inserted into the positioning holes of the opposite ends through the positioning pins on the flange plate, so that the alignment of the four waveguide cavities and the waveguide cavities on the mounting plate is realized, and the screws are screwed into the threaded holes of the mounting plate through the counter bores on the flange plate, so that the connection and the fixation of the four-cavity coaxial waveguide converter and the mounting plate are realized.

The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art from this disclosure that changes, modifications, substitutions and alterations can be made without departing from the principles and spirit of the invention.

Claims

1. A four-cavity coaxial waveguide transducer, characterized in that it comprises an inner conductor, an insulator, a coaxial end housing, and a waveguide end housing. The coaxial end housing has four identical through holes, each sequentially housing four identical insulators and four identical inner conductors. The waveguide end housing has four identical rectangular waveguide cavities, each containing an identical rectangular stepped matching block. The coaxial end housing and the waveguide end housing are connected by soldering. One end of the inner conductor passes through the through hole of the coaxial end insulator and extends into a small hole in the matching block of the waveguide end housing, achieving waveguide-to-coaxial conversion. The other end extends beyond the insulator and can connect to a microstrip line, thereby enabling microwave signal transmission. The inner conductor is stepped shaft-shaped, with its smaller outer diameter pressed into the rectangular matching block. The shoulder end face of the inner conductor contacts the right end face of the matching block. The conductor has a groove on its thicker outer circumference to accommodate potting compound. The insulator is cylindrical and has a through-hole for inserting the inner conductor. The outer circumference of the insulator passes through the through-hole of the coaxial end housing. The left end face of the insulator contacts the right end face of the mating block. The left and right end faces of the insulator are flush with the left and right end faces of the coaxial end housing, respectively. The insulator has two potting through-holes perpendicular to the axis, and the axis of the potting through-holes is aligned with the center of the inner conductor potting groove. The coaxial end housing is made of aluminum alloy. The left end of the coaxial end housing has a rectangular boss for inserting into the rectangular cavity at the right end of the waveguide end housing and soldering it thereto. To the right of the rectangular boss of the coaxial end housing are two twin bodies with rounded corners. Each twin body has two circular through-holes, and the axis of the through-holes is on the same line as the center line of the waveguide cavity. Online, the two twin-unit structures are connected by reinforcing ribs. Each twin-unit structure has four potting through-holes perpendicular to the four through-hole axes. The axis of the potting through-holes is aligned with the axis of the insulator potting through-holes and the center of the inner conductor potting groove. The inner conductor is connected to the coaxial end shell and the insulator via potting. The waveguide end shell is made of aluminum alloy. The left end of the waveguide end shell is a rounded rectangular flange. The flange has six countersunk holes near the four corners and the middle of the long side, used to connect the four-cavity coaxial waveguide converter to the mounting plate. The flange has four rectangular waveguide cavities, with the long side of each cavity parallel to the long side of the flange and the short side parallel to the short side of the flange. A locating pin is located at each diagonal position on both sides of the long side of each waveguide cavity for connecting the four-cavity waveguide to its mating cavity. Inserted into the positioning hole at the mating end, it achieves rapid alignment of the waveguide cavities to be connected at both ends. The waveguide end shell integrates four waveguide cavities into one shell, sharing a waveguide wall and a waveguide flange. Each of the four rectangular waveguide cavities is provided with a rectangular stepped mating block. Each of the four mating blocks is provided with a small hole, which is used to connect with the inner conductor of the coaxial end, thereby realizing the conversion between waveguide and coaxial. The right end of the flange is a rounded rectangular shell. The right end of the rounded rectangular shell is provided with a rounded rectangular hole for inserting the rounded rectangular shell boss of the coaxial end. There are two opposing soldering holes on the wall of the rounded rectangular hole. When soldering the waveguide end shell and the coaxial end shell, an upper clamping plate that avoids the pin and a lower clamping plate that inserts part of the coaxial end are used as clamps, and the upper and lower clamping plates are locked with locking screws to ensure the consistency of the shell length during soldering.