CN113496826B - L29 interface high-power single-pole double-throw microwave switch - Google Patents
L29 interface high-power single-pole double-throw microwave switch Download PDFInfo
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- CN113496826B CN113496826B CN202110712848.7A CN202110712848A CN113496826B CN 113496826 B CN113496826 B CN 113496826B CN 202110712848 A CN202110712848 A CN 202110712848A CN 113496826 B CN113496826 B CN 113496826B
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- 235000014676 Phragmites communis Nutrition 0.000 claims abstract description 57
- 239000004020 conductor Substances 0.000 claims abstract description 54
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical group [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 claims description 3
- 239000012212 insulator Substances 0.000 claims description 3
- 244000089486 Phragmites australis subsp australis Species 0.000 claims description 2
- 230000005674 electromagnetic induction Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 2
- 230000037431 insertion Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/06—Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
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Abstract
The invention discloses an L29 interface high-power single-pole double-throw microwave switch, which comprises a shell, a signal control system, an electromagnetic conversion system, a microwave guide system and a plurality of L29 type radio frequency coaxial connectors, wherein the signal control system, the electromagnetic conversion system and the microwave guide system are arranged in the shell, and the L29 type radio frequency coaxial connectors are connected to the bottom end of the shell. The invention increases the moving distance between the radio frequency reed of the microwave guidance system and the inner conductor of the L29 type radio frequency coaxial connector as much as possible under the premise of ensuring low standing wave ratio and small insertion loss, and the longitudinal section of the radio frequency reed is trapezoidal, adopts a variable impedance matching structure, improves the power tolerance capability of the product under the premise of ensuring basic electric performance, and reduces the random vibration failure rate of the product. The contact part of the top surface of the inner conductor of the L29 type radio frequency coaxial connector contacted with the radio frequency reed is provided with the groove, namely the radio frequency contact part is in concave-convex surface contact, so that the condition of low-frequency range contact failure of the microwave switch is reduced, and the working reliability in a low-temperature environment is effectively improved.
Description
Technical Field
The invention relates to the technical field of high-power microwave switches, in particular to an L29 interface high-power single-pole double-throw microwave switch.
Background
The L29 interface high-power microwave switch is used for transmission and switching of a microwave signal path, and is a device for switching microwave signals through mechanical actions. Mainly comprises a signal control system, an electromagnetic conversion system and a microwave guiding system. The main working principle is as follows: the drive (remote control) signal is applied to the electromagnetic conversion system through the signal control system, and the electromagnetic conversion system generates state change and pushes the microwave guide system to complete signal switching or power transmission.
The L29 interface high-power microwave switch is mainly applied to low-temperature (-55 ℃) and low-pressure aviation environments, and has higher vibration level. The structure is closed, in the use process, along with the change of air pressure, the moist air of external environment is mixed with organic matters, and can possibly get into the inside of the microwave switch and be attached to the radio frequency contact of the microwave switch, when the microwave switch works under the low-temperature (-55 ℃) environment condition, poor contact of the radio frequency contact of the microwave switch is caused, the contact resistance is increased, the condition that the microwave switch is invalid in contact of a low frequency range possibly occurs, and the use requirement of a user cannot be met. The L29 type radio frequency coaxial connector is large in size, the self weight of the product is large, and in order to meet the high-power transmission requirement, the radio frequency contact reed is thick, so that the quality of a moving part assembly in the product is large, and the vibration resistance is poor. During use, vibration failure may occur.
The use frequency of the existing L29 interface high-power microwave switch is 0.1-0.8GHz, and the condition of low-frequency contact failure can occur in a low-temperature (-55 ℃) environment. At present, microwave switch manufacturers at home and abroad aim at failure in a low-temperature (-55 ℃) environment, and a common solution is to protect the microwave switch by using sealant. However, this measure does not completely solve the problem of low temperature (-55 ℃) failure during the course of air pressure change. A common solution to the problem of vibration failure is to reduce the mass of the moving parts. But this measure is contradictory to the power tolerance index.
Disclosure of Invention
The invention aims to solve the technical problem of providing the L29 interface high-power single-pole double-throw microwave switch, which can ensure the reliable work of a product in a low-temperature environment of-55 ℃ and effectively reduce the vibration failure rate by combining the quality control of moving parts through the change of a radio frequency contact structure and the matching design of a microwave guidance system.
The technical scheme of the invention is as follows:
The L29 interface high-power single-pole double-throw microwave switch comprises a shell, a signal control system, an electromagnetic conversion system and a microwave guide system which are arranged in the shell, and three L29 type radio frequency coaxial connectors which are connected to the bottom end of the shell;
the electromagnetic conversion system comprises a yoke, a coil rack arranged in the yoke, a coil wound on the coil rack and an iron core, wherein the iron core sequentially penetrates through the top end of the yoke and the inner ring of the coil rack from top to bottom and penetrates out from the bottom end of the yoke, and the coil is connected with the signal control system to realize power supply;
The microwave guide system comprises a cavity, a cavity cover, two push rods, radio frequency reeds fixedly connected to each push rod and springs sleeved on each push rod, wherein the L29 type radio frequency coaxial connectors comprise outer conductors and inner conductors, the top ends of the outer conductors of the L29 type radio frequency coaxial connectors are all fixed on the bottom end of the cavity, the outer conductors of the L29 type radio frequency coaxial connectors in the middle position are coaxial with the cavity, the other two L29 type radio frequency coaxial connectors are all positioned on two sides of one L29 type radio frequency coaxial connector, the upper parts of the inner conductors extend and are fixed in the cavity, and insulators are arranged between the inner conductors and the cavity and between the inner conductors and the outer conductors; the cavity is internally provided with two adjusting screws in a threaded manner, each adjusting screw is in threaded connection with the cavity from bottom to top of the cavity, the top of each adjusting screw is provided with a guide groove with an upward opening, each guide groove is internally provided with a spring and a push rod, each push rod is provided with a horizontal downward annular step surface, the upper part of the spring is sleeved on the lower part of the push rod, the two ends of the spring are respectively contacted with the bottom of the guide groove and the annular step surface of the push rod, each push rod is coaxial with one iron core corresponding to the electromagnetic conversion system, each radio frequency reed is provided with a perforation, each horizontally arranged radio frequency reed is sleeved and fixed on the corresponding one push rod through the perforation, the cavity is internally provided with a moving gap for the radio frequency reed to move up and down, the longitudinal section of each radio frequency reed is trapezoid, when the radio frequency reed is not stressed, the inner end part of each radio frequency reed is positioned right above one of the L29 type radio frequency coaxial connector inner conductors, the outer end part of each radio frequency reed is respectively positioned above the other two L29 type radio frequency coaxial connectors inner conductors, and the upper surface of each radio frequency reed is contacted with the inner conductor is provided with a plurality of the inner radio frequency conductors;
The coil of the electromagnetic conversion system is electrified, the iron core moves downwards, the iron core pushes the push rods of the microwave guide system to move downwards, each push rod drives the corresponding radio frequency reed to move downwards, and each radio frequency reed is in contact connection with the top surface of the corresponding inner conductor to conduct a radio frequency channel.
The grooves on the top surface of the inner conductor of each L29 type radio frequency coaxial connector are distributed in an annular mode, the annular shape formed by the grooves is concentric with the inner conductor, and when the radio frequency reed is in contact with the inner conductor, the part, provided with the grooves, of the top surface of the inner conductor is overlapped with the bottom surface of the radio frequency reed.
The yoke of the electromagnetic conversion system comprises an upper yoke, a lower yoke and an annular yoke, wherein the annular yoke is fixed between the upper yoke and the lower yoke, a coil wound on the coil rack is positioned between the upper yoke and the lower yoke and positioned at the inner ring of the annular yoke, and the iron core sequentially penetrates through the upper yoke and the inner ring of the coil rack from top to bottom and penetrates out of the lower yoke.
Each push rod comprises an upper push rod and a lower push rod, the upper push rod and the lower push rod are of a stepped cylinder structure, the diameter of the upper part of the upper push rod is larger than that of the lower part of the upper push rod, the diameter of the upper part of the lower push rod is larger than that of the lower part of the lower push rod, a clamping groove is formed in the top end of the lower push rod, the lower part of the upper push rod penetrates through a hole corresponding to the radio frequency reed and then is clamped into the clamping groove of the lower push rod, the upper horizontal downward annular step surface of the upper push rod is abutted against the top surface of the radio frequency reed, the top surface of the lower push rod is abutted against the bottom surface of the radio frequency reed, the radio frequency reed is clamped between the upper push rod and the lower push rod, the upper part of the spring is sleeved on the lower part of the lower push rod, and two ends of the spring are respectively contacted with the bottom of the guide groove and the upper horizontal downward annular step surface of the lower push rod.
The invention has the advantages that:
The invention increases the moving distance between the radio frequency reed and the inner conductor as much as possible under the premise of ensuring low standing wave ratio and small insertion loss, and the longitudinal section of the radio frequency reed is trapezoidal, adopts a variable impedance matching structure, improves the power tolerance of the product under the premise of ensuring basic electric performance, and reduces the random vibration failure rate of the product. The contact part of the top surface of the inner conductor contacted with the radio frequency reed is provided with the groove, namely the radio frequency contact part is in concave-convex surface contact, so that the condition of low-frequency band contact failure of the microwave switch is reduced, and the working reliability in a low-temperature environment is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of an electromagnetic conversion system according to the present invention.
Fig. 2 is a schematic diagram of the connection of the microwave guidance system of the present invention to an L29 rf coaxial connector.
Fig. 3 is a schematic diagram showing the structure of the contact conduction between the radio frequency reed and the inner conductor.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The L29 interface high-power single-pole double-throw microwave switch comprises a shell, a signal control system, an electromagnetic conversion system, a microwave guide system and a plurality of L29 type radio frequency coaxial connectors, wherein the signal control system, the electromagnetic conversion system and the microwave guide system are arranged in the shell;
Referring to fig. 1, the electromagnetic conversion system includes an upper yoke 11, a lower yoke 12, a ring-shaped yoke 13, a bobbin 14, a coil 15 wound around the bobbin 14, and an iron core 16, wherein the ring-shaped yoke 13 is fixed between the upper yoke 11 and the lower yoke 12, the coil 15 wound around the bobbin 14 is positioned between the upper yoke 11 and the lower yoke 12 and positioned at an inner ring of the ring-shaped yoke 13, the iron core 16 sequentially passes through the upper yoke 11 and the inner ring of the bobbin 14 from top to bottom and passes out from the lower yoke 12, and the coil 15 is connected with the signal control system to realize power supply;
Referring to fig. 2, the microwave guidance system includes a cavity 21, a cavity cover 29, two push rods, a radio frequency reed 22 fixedly connected to each push rod, and a spring 23 sleeved on each push rod, wherein the L29-type radio frequency coaxial connector includes an outer conductor 24 and an inner conductor 25, the top end of the outer conductor 24 of each L29-type radio frequency coaxial connector is fixed on the bottom end of the cavity 21, the outer conductor 24 of the L29-type radio frequency coaxial connector in the middle position is coaxial with the cavity 21, the other two L29-type radio frequency coaxial connectors are positioned on two sides of the L29-type radio frequency coaxial connector in the middle position, the upper part of the inner conductor 25 extends and is fixed in the cavity 21, and an insulator 26 is arranged between the inner conductor 25 and the cavity 21 and between the inner conductor 25 and the outer conductor 24; the cavity 21 is internally and threadedly connected with two adjusting screws 210, each adjusting screw 210 is in threaded connection with the cavity 21 from bottom to top from the bottom end of the cavity 21, the top end of each adjusting screw 210 is provided with a guide groove with an upward opening, a spring 23 and a push rod are arranged in each guide groove, each push rod is coaxial with one iron core 16 corresponding to the electromagnetic conversion system, each radio frequency reed 22 is provided with a perforation, each push rod comprises an upper push rod 27 and a lower push rod 28, the upper push rod 27 and the lower push rod 28 are of a ladder-shaped cylinder structure, the diameter of the upper part of the upper push rod 27 is larger than the diameter of the lower part of the upper push rod 27, the diameter of the upper part of the lower push rod 28 is larger than the diameter of the lower part of the lower push rod 28, the top end of the lower push rod 28 is provided with a clamping groove, the lower part of the upper push rod 27 is clamped into the clamping groove of the lower push rod 28 after passing through the perforation corresponding to the radio frequency reed 22, the upper push rod 27 is horizontally and downwardly provided with an annular step surface against the top surface of the radio frequency reed 22, the top surface of the lower push rod 28 is against the bottom surface of the radio frequency reed 22, thereby clamping the radio frequency reed 22 between the upper push rod 27 and the lower push rod 28, a moving gap for the radio frequency reed 22 to move up and down is arranged in the cavity 21, the upper part of the spring 23 is sleeved on the lower part of the lower push rod 28, the two ends of the spring 23 are respectively contacted with the bottom of the guide groove and the horizontally and downwardly provided annular step surface on the lower push rod 28, the longitudinal section of each radio frequency reed 22 is trapezoid, when the radio frequency reed 22 is not stressed, the inner end part of each radio frequency reed 22 is positioned right above one L29 type radio frequency coaxial connector inner conductor 25, the outer end part of each radio frequency reed 22 is respectively positioned right above the other two L29 type radio frequency coaxial connector inner conductors 25, the top surface of each L29-type rf coaxial connector inner conductor 25 is provided with a plurality of grooves 29 (see fig. 3 and 4), the plurality of grooves 29 are annularly arranged, the ring formed by the plurality of grooves 29 is concentric with the inner conductor 25, and when the rf reed 22 is forced to contact with the top surface of the inner conductor 25, the part of the top surface of the inner conductor 25 provided with the grooves 29 is partially overlapped with the bottom surface of the rf reed 22;
The coil 15 of the electromagnetic conversion system is electrified to drive the iron core 16 to move downwards, the iron core 16 pushes the push rods of the microwave guide system to move downwards, each push rod drives the corresponding radio frequency reed 22 to move downwards, and each radio frequency reed 22 is in contact connection with the top surface of the corresponding inner conductor 25 to conduct a radio frequency channel.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
- The L29 interface high-power single-pole double-throw microwave switch is characterized in that: the electromagnetic induction type microwave coaxial connector comprises a shell, a signal control system, an electromagnetic conversion system, a microwave guide system and three L29 type radio frequency coaxial connectors, wherein the signal control system, the electromagnetic conversion system and the microwave guide system are arranged in the shell;the electromagnetic conversion system comprises a yoke, a coil rack arranged in the yoke, a coil wound on the coil rack and an iron core, wherein the iron core sequentially penetrates through the top end of the yoke and the inner ring of the coil rack from top to bottom and penetrates out from the bottom end of the yoke, and the coil is connected with the signal control system to realize power supply;The microwave guide system comprises a cavity, a cavity cover, two push rods, radio frequency reeds fixedly connected to each push rod and springs sleeved on each push rod, wherein the L29 type radio frequency coaxial connectors comprise outer conductors and inner conductors, the top ends of the outer conductors of the L29 type radio frequency coaxial connectors are all fixed on the bottom end of the cavity, the outer conductors of the L29 type radio frequency coaxial connectors in the middle position are coaxial with the cavity, the other two L29 type radio frequency coaxial connectors are all positioned on two sides of one L29 type radio frequency coaxial connector, the upper parts of the inner conductors extend and are fixed in the cavity, and insulators are arranged between the inner conductors and the cavity and between the inner conductors and the outer conductors; the cavity is internally provided with two adjusting screws in a threaded manner, each adjusting screw is in threaded connection with the cavity from bottom to top of the cavity, the top of each adjusting screw is provided with a guide groove with an upward opening, each guide groove is internally provided with a spring and a push rod, each push rod is provided with a horizontal downward annular step surface, the upper part of the spring is sleeved on the lower part of the push rod, the two ends of the spring are respectively contacted with the bottom of the guide groove and the annular step surface of the push rod, each push rod is coaxial with one iron core corresponding to the electromagnetic conversion system, each radio frequency reed is provided with a perforation, each horizontally arranged radio frequency reed is sleeved and fixed on the corresponding one push rod through the perforation, the cavity is internally provided with a moving gap for the radio frequency reed to move up and down, the longitudinal section of each radio frequency reed is trapezoid, when the radio frequency reed is not stressed, the inner end part of each radio frequency reed is positioned right above one of the L29 type radio frequency coaxial connector inner conductors, the outer end part of each radio frequency reed is respectively positioned above the other two L29 type radio frequency coaxial connectors inner conductors, and the upper surface of each radio frequency reed is contacted with the inner conductor is provided with a plurality of the inner radio frequency conductors;the coil of the electromagnetic conversion system is electrified, the iron core moves downwards, the iron core pushes the push rod of the microwave guide system to move downwards, each push rod drives the corresponding radio frequency reed to move downwards, and each radio frequency reed is in contact connection with the top surface of the corresponding inner conductor to conduct a radio frequency channel;The grooves on the top surface of the inner conductor of each L29 type radio frequency coaxial connector are distributed in an annular mode, the annular shape formed by the grooves is concentric with the inner conductor, and when the radio frequency reed is in contact with the inner conductor, the part of the top surface of the inner conductor, on which the grooves are arranged, is overlapped with the bottom surface of the radio frequency reed;The yoke of the electromagnetic conversion system comprises an upper yoke, a lower yoke and an annular yoke, wherein the annular yoke is fixed between the upper yoke and the lower yoke, a coil wound on the coil rack is positioned between the upper yoke and the lower yoke and positioned at the inner ring of the annular yoke, and the iron core sequentially penetrates through the upper yoke and the inner ring of the coil rack from top to bottom and penetrates out of the lower yoke.
- 2. The L29-interface high-power single-pole double-throw microwave switch of claim 1, wherein: each push rod comprises an upper push rod and a lower push rod, the upper push rod and the lower push rod are of a stepped cylinder structure, the diameter of the upper part of the upper push rod is larger than that of the lower part of the upper push rod, the diameter of the upper part of the lower push rod is larger than that of the lower part of the lower push rod, a clamping groove is formed in the top end of the lower push rod, the lower part of the upper push rod penetrates through a hole corresponding to the radio frequency reed and then is clamped into the clamping groove of the lower push rod, the upper horizontal downward annular step surface of the upper push rod is abutted against the top surface of the radio frequency reed, the top surface of the lower push rod is abutted against the bottom surface of the radio frequency reed, the radio frequency reed is clamped between the upper push rod and the lower push rod, the upper part of the spring is sleeved on the lower part of the lower push rod, and two ends of the spring are respectively contacted with the bottom of the guide groove and the upper horizontal downward annular step surface of the lower push rod.
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| CN202110712848.7A CN113496826B (en) | 2021-06-25 | 2021-06-25 | L29 interface high-power single-pole double-throw microwave switch |
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| CN202110712848.7A CN113496826B (en) | 2021-06-25 | 2021-06-25 | L29 interface high-power single-pole double-throw microwave switch |
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| CN113496826A CN113496826A (en) | 2021-10-12 |
| CN113496826B true CN113496826B (en) | 2024-06-07 |
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