A four-cavity coaxial waveguide converter

Abstract

The application discloses a high-performance four-cavity coaxial waveguide converter, four same through holes are arranged in a coaxial end shell, four same insulators and four same inner conductors are sequentially arranged in the through holes, four same rectangular waveguide cavities are arranged in a waveguide end shell, one same rectangular stepped matching block is arranged in each of the four rectangular waveguide cavities, the coaxial end shell is connected with the waveguide end shell through tin soldering, one end of the inner conductor penetrates through the through hole of the coaxial end insulator and extends into a small hole of the matching block of the waveguide end shell, the waveguide is converted into the coaxial, the other end of the inner conductor extends out of the insulator and can be connected with a microstrip line, so that the transmission of microwave signals is realized; the application adopts a special shell welding positioning clamp, ensures the consistency of the length of the shell, and eliminates the influence of the inconsistent length on the phase; and the application adopts a special four-cavity waveguide converter during testing, and the testing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of transducer, in particular to a high-performance four-cavity coaxial waveguide transducer. BACKGROUND

[0002] Since the coaxial waveguide transducer can realize the mutual conversion between waveguide and coaxial products, and realize the interconnection between the whole machine equipment, it is widely used in occasions requiring transmission of electromagnetic signals and energy. With the development of miniaturization and light weight of the whole machine equipment, the market demand for miniaturization and light weight of the coaxial waveguide transducer is also increasing.

[0003] With the wide application of phased technology at home and abroad, high requirements are put forward for the phase consistency of the coaxial waveguide transducer, that is, the phase difference of any two groups in the coaxial waveguide transducer is required to be as small as possible. Since the voltage standing wave ratio is a reflection of the uniformity of the transmission characteristic impedance of the coaxial waveguide transducer and the size of the reflection of the transmission signal, it also reflects the matching degree of the coaxial waveguide transducer with the system in the electronic system, therefore, the expected value of the voltage standing wave ratio of the high-performance coaxial waveguide transducer is as small as possible.

[0004] At present, although a few coaxial waveguide transducers on the market can realize good phase consistency and low voltage standing wave ratio, since they generally adopt the conversion form of single waveguide cavity and single coaxial part, and the waveguide is generally connected by flange, in addition to the connection hole, the flange is also provided with a positioning pin to facilitate the alignment of the waveguide cavities, which limits the miniaturization and light weight of the coaxial waveguide transducer. For integrated coaxial waveguide transducers, since multiple paths are integrated together, the structure is relatively complex, and it is difficult to realize the phase consistency of multiple transmission, and in addition, when testing multiple paths, single-path tooling is used to test each channel one by one, not only the test efficiency is low, but also the test result has certain deviation from the simultaneous connection of multiple paths in the system. Under this background, there is an urgent need for a high-performance coaxial waveguide transducer that can not only be miniaturized and lightened, but also can realize good phase consistency and low voltage standing wave ratio to meet the current market demand. SUMMARY

[0005] The present application aims to provide a high-performance four-cavity coaxial waveguide transducer to solve the above technical problems.

[0006] To achieve the above purpose, the present application adopts the following technical scheme:

[0007] A high-performance four-cavity coaxial waveguide converter, comprising an inner conductor, an insulator, a coaxial end shell, a waveguide end shell, four identical through holes are arranged in the coaxial end shell, four identical insulators and four identical inner conductors are sequentially arranged, four identical rectangular waveguide cavities are arranged in the waveguide end shell, and one identical rectangular stepped matching block is arranged in each of the four rectangular waveguide cavities, the coaxial end shell and the waveguide end shell 4 are connected through tin soldering, one end of the inner conductor penetrates through the through hole of the coaxial end insulator and extends into the small hole of the matching block of the waveguide end shell, so that the conversion of the waveguide and the coaxial is realized, and the other end of the inner conductor extends out of the insulator part and can be connected with a microstrip line, so that the transmission of microwave signals is realized.

[0008] Preferably, the inner conductor is connected with the coaxial end shell and the insulator through potting.

[0009] Preferably, the inner conductor is in a stepped shaft shape, the front end of the inner conductor is smaller and is pressed into the rectangular matching block, and a special coaxial positioning clamp is used when the inner conductor is pressed, so as to ensure the coaxiality of the inner conductor and the inner hole of the coaxial end shell, and also ensure that the inner conductor will not be deformed due to over-pressing, and the inconsistent length of the inner conductor extending out of the matching block due to improper pressing is avoided, and factors affecting the voltage standing wave ratio and phase consistency are further eliminated. The inner conductor shaft shoulder end surface is in contact with the right end surface of the matching block, and grooves for accommodating potting glue are arranged on the outer circle of the thicker part of the inner conductor.

[0010] Preferably, the insulator is in a cylindrical shape, the insulator is provided with a through hole for accommodating the inner conductor, the outer circle of the insulator penetrates through the through hole of the coaxial end shell, the left end surface of the insulator is in contact with the right end surface of the matching block, and the left and right end surfaces of the insulator are flush with the left and right end surfaces of the coaxial end shell, respectively, two potting through holes are arranged on the insulator in a direction perpendicular to the axis, and the axis of the potting hole is aligned with the center of the inner conductor potting groove.

[0011] Preferably, the coaxial end shell is made of aluminum alloy material, the left end of the coaxial end shell is a rectangular boss, which is arranged in the rectangular cavity at the right end of the waveguide end shell and is tin soldered with the waveguide end shell, the right side of the rectangular boss of the coaxial end shell is two double bodies, the double bodies are round rectangular, two circular through holes are arranged in the double bodies respectively, the axis of the through hole is on the same line as the center line of the waveguide cavity, the two double bodies are connected by a reinforcing rib, and four potting through holes are arranged on the two double bodies in a direction perpendicular to the four through hole axes respectively, the axis of the potting hole is aligned with the axis of the insulator potting hole and the center of the inner conductor potting groove.

[0012] Preferably: the waveguide end shell adopts aluminum alloy material, the left end of the waveguide end shell is a round rectangular flange, the flange is provided with 6 connecting holes at the positions close to the four corners and the middle of the long side, the connecting holes are counterbores, used for connecting the four-cavity coaxial waveguide converter with the mounting plate, four rectangular waveguide cavities are arranged on the flange, the long side of the waveguide cavity is parallel to the long side of the flange 7, and the short side is parallel to the short side of the flange, a positioning pin is arranged at the diagonal position of the long side of the waveguide cavity, used for inserting into the positioning hole at the matched end when the four-cavity waveguide is connected with the matched waveguide cavity, so as to quickly align the waveguide cavities to be connected at both ends, the waveguide end shell integrates the four waveguide cavities in one shell, shares the waveguide wall and the waveguide flange, thereby reducing the volume and weight.

[0013] Preferably: a rectangular stepped matching block is arranged in each of the four rectangular waveguide cavities, a small hole is arranged on each of the four matching blocks, the small hole is used for being connected with the inner conductor of the coaxial end, so as to realize the conversion of the waveguide and the coaxial, the right end of the flange is a round rectangular shell, a round rectangular hole is arranged at the right end of the round rectangular shell, used for accommodating the round rectangular shell boss of the coaxial end, two opposite soldering holes are arranged at the wall of the round rectangular hole, the solder flows in from one end of the soldering hole and flows out from the other soldering hole during soldering, so that the solder fills the connection part of the coaxial end shell and the rectangular end shell, ensuring the reliability of the connection of the two shells. The waveguide end shell and the coaxial end shell adopt a special upper clamping plate with a avoiding pin and a lower clamping plate that partially accommodates the coaxial end during soldering, and a locking screw is used to lock the upper and lower clamping plates, so as to ensure the consistency of the length of the shell during soldering.

[0014] Compared with the prior art, the application has the following advantages: the application has simple structure and can be realized by using conventional process method. The aluminum alloy material is used to reduce the weight of the product. The four waveguide cavities are integrated in a shell, and the waveguide wall and the waveguide flange are shared, so that the volume and the weight are reduced. The two coaxial end shells are integrated together, and the reinforcing ribs are used to connect the two integrated shells, so that the strength of the product is ensured, and the volume and the weight are reduced. The coaxial end adopts the potting structure, so that the influence of the barb structure and the point riveting structure on the length and the uniform consistency of the insulating medium is avoided, and the factors affecting the voltage standing wave ratio and the phase consistency are eliminated. The coaxial positioning clamp is used, so that the non-coaxiality of the inner conductor and the shell, the deformation of the press-fit, and the out-of-position of the press-fit are avoided, and the factors affecting the voltage standing wave ratio and the phase consistency are further eliminated. The special shell welding positioning clamp is used to ensure the consistency of the length of the shell and eliminate the influence of the inconsistent length on the phase. The special four-cavity waveguide converter is used during the test to improve the test efficiency. The waveguide converter, the product and the coaxial end test tool are connected together by using the test frame, so that the influence of the excessive connection reference on the phase consistency during the test is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the front view of the application.

[0016] Figure 2 is the left view of the application.

[0017] Figure 3 is the right view of the application.

[0018] Figure 4 is the top view of the application.

[0019] In the figure: A is a tin soldering hole, B is a tin soldering hole, C is potting; 1 is an inner conductor; 2 is an insulator; 3 is a coaxial end shell; 4 is a waveguide end shell; 5 is a waveguide cavity; 6 is a matching block; 7 is a flange; 8 is a positioning pin; 9 is a counterbore; 10 is a double connection; 11 is a reinforcing rib. DETAILED DESCRIPTION

[0020] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] As shown in the figure, a 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. The coaxial end shell 3 is provided with four identical through holes, and is sequentially provided with four identical insulators 2 and four identical inner conductors 1. The waveguide end shell 4 is provided with four identical rectangular waveguide cavities 5, and each of the four rectangular waveguide cavities 5 is provided with one identical rectangular stepped matching block 6. The coaxial end shell 3 and the waveguide end shell 4 are connected by tin soldering, one end of the inner conductor 1 penetrates through the through hole of the coaxial end insulator 2 and extends into the small hole of the matching block 6 of the waveguide end shell 4 to realize the conversion between the waveguide and the coaxial, and the other end extends out of the insulator part and can be connected with a microstrip line to realize the transmission of microwave signals. The inner conductor 1, the coaxial end shell 3, and the insulator 2 are connected by potting.

[0022] The inner conductor 1 is in the shape of a stepped shaft, the front end of the inner conductor 1 is smaller and is pressed into the rectangular matching block 6, and a special coaxial positioning clamp is used when the inner conductor 1 is pressed to ensure the coaxiality of the inner conductor 1 and the inner hole of the coaxial end shell 3, and to ensure that the inner conductor 1 will not be deformed due to over-pressing and that the length of the inner conductor 1 extending out of the matching block 6 will not be inconsistent due to improper pressing, further eliminating factors affecting the voltage standing wave ratio and phase consistency. The shaft shoulder end surface of the inner conductor 1 is in contact with the right end surface of the matching block 6. A groove for accommodating potting glue is provided on the outer circle of the inner conductor 1, the inner conductor 1 penetrates through the insulator 2 and extends out by a certain length, and the extending end of the inner conductor 1 can be connected with a microstrip line to realize the transmission of microwave signals.

[0023] The insulator 2 is in the shape of a cylinder, the insulator 2 is provided with a through hole for accommodating the inner conductor 1, the outer circle of the insulator 2 penetrates through the through hole of the coaxial end shell 3, the left end surface of the insulator 2 is in contact with the right end surface of the matching block 6, and the left and right end surfaces of the insulator 2 are flush with the left and right end surfaces of the coaxial end shell 3, respectively. The insulator 2 is provided with two potting through holes C in the direction perpendicular to the axis, and the axis of the potting hole C is aligned with the center of the inner conductor 1 potting groove.

[0024] The coaxial end shell 3 is made of aluminum alloy material, the left end of the coaxial end shell 3 is a rectangular boss for being accommodated in the rectangular cavity of the right end of the waveguide end shell 4 and being tin soldered therewith. The right side of the rectangular boss of the coaxial end shell 3 is two double bodies 10, the double bodies 10 are round rectangular, each of the double bodies 10 is provided with two circular through holes, and the axis of the through hole is on the same line as the center line of the waveguide cavity 5. The two double bodies 10 are connected by a reinforcing rib 11, and each of the two double bodies 10 is provided with four potting through holes C in the direction perpendicular to the axis of the four through holes, and the axis of the potting hole C is aligned with the axis of the potting hole C of the insulator 2 and the center of the inner conductor 1 potting groove.

[0025] The coaxial end adopts a pouring structure, which avoids the local outer diameter of the small insulator 2 from becoming thick under force when being pressed into the barb structure, and also avoids the small insulator 2 from being elongated under force near the spot riveting position, thereby ensuring the uniform consistency of the insulating medium, eliminating the influence of the uneven medium on the voltage standing wave ratio, and ensuring the consistency of the physical length of the coaxial waveguide converter, and eliminating the influence of the inconsistent length on the phase.

[0026] The waveguide end shell 4 adopts an aluminum alloy material, the left end of the waveguide end shell 4 is a round rectangular flange 7, the flange 7 is provided with six connecting holes at positions close to the four corners and the middle of the long sides, the connecting holes are counterbores 9, and the four-cavity coaxial waveguide converter is connected with a mounting plate. The flange 7 is provided with four rectangular waveguide cavities 5, the long sides of the waveguide cavities 5 are parallel to the long sides of the flange 7, and the short sides are parallel to the short sides of the flange 7. The waveguide cavities 5 are each provided with a positioning pin 8 at a diagonal position on the two sides of the long side, which is inserted into a positioning hole at the opposite end when the four-cavity waveguide is connected with the opposite waveguide cavity 5, so as to quickly align the waveguide cavities 5 to be connected at the two ends. The waveguide end shell 4 integrates the four waveguide cavities 5 in one shell, and shares the waveguide wall and the waveguide flange 7, thereby reducing the volume and weight.

[0027] The four rectangular waveguide cavities 5 are each provided with a rectangular stepped matching block 6, the four matching blocks 6 are each provided with a small hole, the small hole is used to be connected with the inner conductor 1 of the coaxial end, thereby realizing the conversion between the waveguide and the coaxial. The right end of the flange 7 is a round rectangular shell, the right end of the round rectangular shell is provided with a round rectangular hole, which is used to install a round rectangular shell boss of the coaxial end. The round rectangular hole wall is provided with two opposite soldering holes A and B, the solder flows from the hole A and flows out from the hole B during soldering, thereby filling the solder between the coaxial end shell 3 and the rectangular end shell 4, and ensuring the reliability of the connection between the two shells. The waveguide end shell 4 and the coaxial end shell 3 adopt a special upper clamping plate with a clearance pin and a lower clamping plate that installs the coaxial end into a part during soldering, and the upper and lower clamping plates are locked by a locking screw, thereby ensuring the consistency of the shell length during soldering.

[0028] The four-cavity coaxial waveguide converter simulates the user's use during testing, adopts a special four-cavity waveguide converter, and connects the waveguide cavity 5 of the four-cavity coaxial waveguide converter of the application with the special converter waveguide cavity through the flange 7, then connects the test converter through the test rack that can avoid the product of the application by the middle opening, connects one end with the microstrip end of the product of the application, and the other end can be connected with the test tool and the test rack connected with the test vector network analyzer. The application connects the waveguide converter, the product of the application, and the coaxial end test tool together through the test rack, thereby avoiding the influence of too many connection references on the consistency of the test phase during the test process.

[0029] The mounting method of the present application is as follows: the coaxial end housing 3 is mounted into the waveguide end housing 4, the two housings are clamped in the middle by the upper clamp plate with special avoiding pin and the lower clamp plate which can mount the coaxial end into a part, and the upper and lower clamp plates are locked by locking screws to ensure the consistency of the housing length during welding. During welding, the solder flows into the B end hole from the A end hole, which ensures that the solder infiltrates the entire welding area and ensures the reliability of the welding. Then the coaxial positioning clamp is mounted into the through hole of the coaxial end housing 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 removed after the press fitting is completed, then the coaxial end insulator 2 is mounted into the coaxial end housing 3, and attention should be paid to align the insulator with the potting hole C of the housing, then potting is carried out, and the potting glue should be poured from one end potting hole and flow out from the other end potting hole. The part of the inner conductor 1 extending out of the insulator 2 can be connected with the microstrip line, so as to realize the transmission of microwave signal. The waveguide end is inserted into the positioning hole of the counter-arranged end through the positioning pin on the flange plate, the alignment of the four waveguide cavities and the waveguide cavities on the mounting plate is realized, and the screw is screwed into the threaded hole of the mounting plate through the counterbore on the flange plate, so as to realize the connection and fixation of the four-cavity coaxial waveguide converter and the mounting plate.

[0030] The above describes the preferred embodiment of the present application. For those skilled in the art, according to the teaching of the present application, the changes, modifications, replacements and variations made to the embodiment without departing from the principles and spirits of the present application still fall within the protection scope of the present application.

Claims

1. A four-cavity coaxial waveguide converter, characterized by, The utility model relates to a four-cavity coaxial waveguide converter, including inner conductor, insulator, coaxial end shell, waveguide end shell, four identical through -holes are arranged in the coaxial end shell, four identical insulators and four identical inner conductors are successively equipped, four identical rectangular waveguide cavities are arranged in the waveguide end shell, one identical rectangular stepped matching block is arranged in four rectangular waveguide cavities respectively, the coaxial end shell is connected with waveguide end shell through tin soldering, one end of inner conductor passes through the through -hole of coaxial end insulator and stretches into the small hole of waveguide end shell matching block, realizes the conversion of waveguide and coaxial, and the other end stretches out insulator part and can be connected with microstrip line, thereby realizes the transmission of microwave signal, the inner conductor is stepped axle shape, the smaller outer circle of inner conductor front end is pressed into rectangular matching block, and the end face of inner conductor shaft shoulder is in contact with the right end face of matching block, the outer circle of relatively thick inner conductor is provided with the groove of accommodating filling adhesive, the insulator is cylindrical, the insulator is provided with the through -hole of inner conductor loading, the outer circle of insulator passes through the through -hole of coaxial end shell, and the left end face of insulator is in contact with the right end face of matching block, and the left and right end faces of insulator are flush with the left and right end faces of coaxial end shell respectively, the insulator is provided with two filling through -holes in the direction perpendicular to the axis, the axis of filling through -hole is aligned with the center of inner conductor filling groove, the coaxial end shell adopts aluminium alloy material, the left end of coaxial end shell is rectangular boss, is used to load the rectangular cavity right end of waveguide end shell and is tinned with it, the right side of rectangular boss of coaxial end shell is two double connection bodies, the double connection body is rounded rectangle, two circular through -holes are arranged in the double connection body respectively, the axis of through -hole is on the same straight line with the center line of waveguide cavity, the two double connection bodies are connected with reinforcing rib, four filling through -holes are arranged in the vertical direction of four through -hole axes respectively in the two double connection bodies, and the axis of filling through -hole is aligned with the axis of insulator filling through -hole and the center of inner conductor filling groove, the inner conductor is connected with coaxial end shell and insulator through filling, the waveguide end shell adopts aluminium alloy material, the left end of waveguide end shell is rounded rectangular flange, the flange is provided with 6 connecting holes in the position close to four corners and the middle position of long side, the connecting hole is counterbore, is used to connect four-cavity coaxial waveguide converter with mounting plate, the flange is provided with four rectangular waveguide cavities, the long side of waveguide cavity is parallel with the long side of flange, and the short side is parallel with the short side of flange, one positioning pin is arranged in the diagonal position of the long side of waveguide cavity, is used to insert into the positioning hole of opposite end when four-cavity waveguide is connected with opposite waveguide cavity, reaches the effect that both ends of waveguide cavity to be connected are quickly aligned, the waveguide end shell integrates four waveguide cavities in a shell, shares waveguide wall and waveguide flange, one rectangular stepped matching block is arranged in four rectangular waveguide cavities respectively, one small hole is arranged on four matching blocks respectively, the small hole is used to be connected with coaxial end inner conductor, thereby realizes the conversion of waveguide and coaxial, the right end of flange is rounded rectangular shell, rounded rectangular hole is arranged in the right end of rounded rectangular shell,The application relates to a round rectangular housing boss for loading coaxial ends, two opposite soldering holes are arranged on the round rectangular hole wall, the waveguide end shell and the coaxial end shell are clamped by an upper clamping plate with avoiding pins and a lower clamping plate for loading the coaxial end into a part, and the upper and lower clamping plates are locked by locking screws, so that the consistency of the shell length during welding is ensured.

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