Single-pole multi-throw coaxial switch with load end

Abstract

The application provides a single-pole multi-throw coaxial switch with a load end; comprising a shell, a circuit control mechanism, an electromagnetic drive mechanism and a microwave transmission mechanism; a microwave cavity is formed in the base of the shell; the moving spring plate of the electromagnetic drive mechanism is fixed on the armature, the armature is hinged on the base of the shell, and the hinged ends of the armature are provided with attracting ends; the circuit control mechanism realizes the on-keeping or off-current of a plurality of output electromagnet assemblies or a plurality of load electromagnet assemblies in the electromagnetic drive mechanism; the lower end of the first push rod of the microwave transmission mechanism extends into the microwave cavity and is fixedly connected with the first microwave spring plate, and the first spring is sleeved on the first push rod; the lower end of the second push rod extends into the microwave cavity and is fixedly connected with the second microwave spring plate, and the second spring is sleeved on the second push rod; the two ends of the moving spring plate are respectively aligned with the first push rod and the second push rod of the corresponding spring plate assembly. The coaxial switch solves the problems of signal leakage and mutual interference of the hollow port in the use of the high-frequency multi-channel coaxial switch.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of radio frequency coaxial switches, in particular to a kind of single-blade multi-pole coaxial switch with load end. BACKGROUND

[0002] Radio frequency coaxial switch is a kind of coaxial connector as radio frequency lead end, according to demand switching / selecting microwave signal channel, and realizing high quality transmission to signal passive device, is indispensable basic element in multi-channel microwave system, with low standing wave, low insertion loss, wide frequency band, high power resistance and other advantages.

[0003] With the development of electronic countermeasure technology and the upgrading of military equipment, ordinary coaxial switch has been unable to meet the reliability requirements of system equipment, and the demand for high frequency, high power, multi-channel coaxial switch is increasing. A plurality of coaxial switches are combined into a switch matrix system for microwave signal routing, and the switch is connected to the output end of the signal source, and a plurality of functional load devices are connected to the output end. Since the switch matrix has more output paths, any idle open circuit transmission line may resonate in the microwave frequency range. This resonance may reflect electrical energy back to the radio frequency source in operation, thereby causing damage. For high frequency and high power systems, the above damage will be more serious due to the significant decrease in isolation. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a single-blade multi-pole coaxial switch with load end, which has a reasonable structure and reduces signal interference of idle radio frequency ports.

[0005] To solve the above technical problems, the present application provides a single-blade multi-pole coaxial switch with load end,

[0006] which comprises a housing, a circuit control mechanism, an electromagnetic drive mechanism and a microwave transmission mechanism.

[0007] The housing comprises a cover and a base, and a cavity is formed between the cover and the base. The circuit control mechanism and the electromagnetic drive mechanism are arranged in the cavity. A microwave chamber is formed in the base of the housing.

[0008] The electromagnetic drive mechanism comprises a plurality of output electromagnet assemblies, a plurality of load electromagnet assemblies and a plurality of transmission assemblies. The plurality of output electromagnet assemblies, the plurality of load electromagnet assemblies and the plurality of transmission assemblies are one-to-one corresponding. The output electromagnet assemblies and the load electromagnet assemblies have the same structure, and each of the output electromagnet assemblies and the load electromagnet assemblies comprises a magnetic steel, an iron core, a coil and a yoke. The transmission assembly comprises an armature and a moving spring piece. The moving spring piece is fixed to the armature, and the armature is hinged to the base of the housing. The two ends of the armature are provided with attracting ends. The two attracting ends of the armature are matched with the iron cores of the corresponding output electromagnet assemblies and the corresponding load electromagnet assemblies, respectively. The two ends of the moving spring piece are pressing ends.

[0009] The circuit control mechanism is provided with a plurality of power control ports, which extend outside the shell. The circuit control mechanism controls the on-holding or off-current of a plurality of output electromagnet assemblies or a plurality of load electromagnet assemblies in the electromagnetic drive mechanism.

[0010] The microwave transmission mechanism comprises an input coaxial interface, a plurality of output coaxial interfaces, a plurality of load interfaces and a plurality of reed assemblies.

[0011] The input coaxial interface, the plurality of output coaxial interfaces and the plurality of load interfaces are fixed outside the base of the shell, and the center inner conductor of the input coaxial interface, the center inner conductor of the output coaxial interface and the inner conductor of the load interface extend into the microwave cavity of the base.

[0012] The plurality of output coaxial interfaces, the plurality of load interfaces and the plurality of reed assemblies are in one-to-one correspondence. The reed assembly comprises a first microwave reed, a second microwave reed, a first spring, a first push rod, a second spring and a second push rod. The first microwave reed and the second microwave reed are in the microwave cavity. The lower end of the first push rod extends into the microwave cavity and is fixedly connected with the first microwave reed. The upper end of the first push rod extends to the cavity of the shell. The first spring is sleeved on the first push rod. The first spring is respectively abutted between the upper end of the first push rod and the base of the shell. The two ends of the first microwave reed are respectively aligned with the center inner conductor of the input coaxial interface and the center inner conductor of the corresponding output coaxial interface.

[0013] The lower end of the second push rod extends into the microwave cavity and is fixedly connected with the second microwave reed. The upper end of the second push rod extends to the cavity of the shell. The second spring is sleeved on the second push rod. The second spring is respectively abutted between the upper end of the second push rod and the base of the shell. The two ends of the second microwave reed are respectively aligned with the center inner conductor of the corresponding output coaxial interface and the inner conductor of the corresponding load.

[0014] The plurality of transmission assemblies of the electromagnetic drive mechanism are in one-to-one correspondence with the plurality of reed assemblies of the microwave transmission mechanism. The compression ends of the two ends of the movable reed of the transmission assembly are respectively aligned with the first push rod and the second push rod of the corresponding reed assembly. The movable reed of the transmission assembly can only cooperate with the first push rod or the second push rod at the same time.

[0015] In order to more clearly understand the technical content of the present application, the single-pole multi-throw coaxial switch with a load end will be referred to as the present coaxial switch hereinafter.

[0016] As a preferred embodiment of the present coaxial switch, the circuit control mechanism is a TTL self-off control circuit, and the power control port adopts a soldering pin.

[0017] As a preferred embodiment of the coaxial switch, the input coaxial interface and the plurality of output coaxial interfaces of the microwave transmission mechanism adopt SMA jack connectors, and the load interface is provided with a 50Ω load resistor.

[0018] As a preferred embodiment of the coaxial switch, the plurality of output coaxial interfaces and the plurality of load interfaces are uniformly distributed along the input coaxial interface as the center.

[0019] As a preferred embodiment of the coaxial switch, the line connecting the projection center point of the input coaxial interface on the base of the shell to the projection center point of the output coaxial interface on the base of the shell is not collinear with the line connecting the projection center point of the corresponding input coaxial interface on the base of the shell to the projection center point of the corresponding load interface on the base of the shell, and the length of the line connecting the projection center point of the input coaxial interface on the base of the shell to the projection center point of the output coaxial interface on the base of the shell is greater than the length of the line connecting the projection center point of the corresponding input coaxial interface on the base of the shell to the projection center point of the corresponding load interface on the base of the shell.

[0020] As a preferred embodiment of the coaxial switch, the first microwave spring and the first push rod are hot riveted in the microwave transmission mechanism, and the second microwave spring and the second push rod are hot riveted.

[0021] As a preferred embodiment of the coaxial switch, the base of the shell includes a cavity cover and a seat body, a groove is opened on the end face of the seat body near the cavity side, and the cavity cover is fixedly connected to the end face of the seat body near the cavity side, and the microwave cavity is formed between the seat body and the cavity cover.

[0022] After adopting such a structure, the coaxial switch is a single-throw multi-throw magnetic retention structure, and the radio frequency terminal matches the load, that is, each channel is a group of magnetic retention type single-throw double-throw system. The coaxial switch uses a plurality of output electromagnet assemblies and a plurality of load electromagnet assemblies to realize an "integrated" electromagnetic drive system, and the characteristic is that the outer magnetic circuits of each battery system are connected together, so that the electromagnetic driving force guarantees reliable action under the premise of smaller volume.

[0023] In the coil and yoke assembly mode of the output electromagnet assembly and the load electromagnet assembly, the commonly used core riveting mode is abandoned, and a core threaded connection is used instead. The advantage of this installation mode is that the core height is adjustable, and when the worker adjusts the electromagnetic parameters, the error influence caused by the cumulative tolerance of the part processing size can be eliminated by fine-tuning the core.

[0024] The circuit control mechanism applies a rated working voltage, selects a channel, transmits an electrical signal to the corresponding coil of the electromagnetic drive system, converts electrical energy into magnetic energy, drives the conversion assembly to move, completes the connection of the corresponding radio frequency channel of the microwave transmission system, and inputs and outputs the radio frequency signal through the radio frequency interface.

[0025] The coaxial switch is directly built in the SMA type coaxial load of the radio frequency output end, the frequency reaches 18GHz, the voltage standing wave ratio is less than 1.2, the absorption power is 2W, the impedance is 50Ω, and the signal interference of the idle radio frequency port is effectively reduced, and the energy of the reflected signal is absorbed by the coaxial load, thereby protecting the radio frequency source.

[0026] The coaxial switch has the beneficial technical effects that the design of the built-in coaxial load end magnetic latching single-pole multi-throw coaxial switch is completed, the problems of signal leakage, mutual interference and damage to the radio frequency source of the idle port in the use process of the high-frequency multi-channel coaxial switch are effectively solved, the high-quality transmission of the radio frequency signal is ensured, and the technology fills the technical blank of the domestic coaxial switch with the load end. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is one of the left views of the embodiment of the coaxial switch.

[0028] Figure 2 is the second left view of the embodiment of the coaxial switch.

[0029] Figure 3 is the bottom view of the microwave transmission mechanism and the shell base in the embodiment of the coaxial switch.

[0030] Figure 4 is Figure 3 the sectional view along A-A.

[0031] Figure 5 is the front view of the reed assembly and the cavity cover in the embodiment of the coaxial switch.

[0032] Figure 6 is Figure 5 the bottom view.

[0033] Figure 7 is the structural schematic view of the transmission assembly in the embodiment of the coaxial switch. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "including", "comprising", "having" and the like are meant to encompass the items listed thereafter as well as other items.

[0037] Please refer to Figures 1 to 7 ( Figure 2 The outer cover 11 of the shell is omitted.

[0038] The coaxial switch comprises a shell, a circuit control mechanism 3, an electromagnetic driving mechanism and a microwave transmission mechanism.

[0039] The shell comprises an outer cover 11 and a base 12, and a cavity is formed between the outer cover 11 and the base 12. The circuit control mechanism 3 and the electromagnetic driving mechanism are arranged in the cavity. The base 12 of the shell comprises a cavity cover 12a and a base body 12b. A groove is formed on the end face of the base body 12b close to the cavity. The cavity cover 12a is fixedly connected to the end face of the base body 12b close to the cavity. The base body 12b and the cavity cover 12a form a microwave cavity 12c.

[0040] The electromagnetic driving mechanism comprises six groups of output electromagnet assemblies 21, six groups of load electromagnet assemblies 22 and six groups of transmission assemblies 23. The six groups of output electromagnet assemblies 21, the six groups of load electromagnet assemblies 22 and the six groups of transmission assemblies 23 correspond one by one.

[0041] The output electromagnet assemblies 21 and the load electromagnet assemblies 22 have the same structure and comprise a magnetic steel, an iron core, a coil and a yoke. In the assembly mode of the coil and the yoke, the commonly used iron core riveting mode is abandoned, and the iron core is connected by threads. The advantage of this installation mode is that the height of the iron core is adjustable. When workers debug the electromagnetic parameters, the error caused by the cumulative tolerance of the machining size of the parts can be eliminated by fine-tuning the iron core.

[0042] The transmission assembly 23 comprises an armature 23a and a moving spring piece 23b. The moving spring piece 23b is fixedly installed on the armature 23a. The armature 23a is hinged to the cavity cover 12a of the shell base 12 through a rotating shaft 23c. The armature 23a is provided with two attracting ends at the two ends thereof. The two attracting ends of the armature 23a are matched with the iron cores of the corresponding output electromagnet assemblies 21 and the corresponding load electromagnet assemblies 22. The two ends of the moving spring piece 23b are pressing ends.

[0043] The electromagnetic force generated by the output electromagnet assembly 21 or the load electromagnet assembly 22 pushes the armature 23a and the moving spring piece 23b to move up and down, thereby pushing the transmission assembly 23, so as to realize the transition of the on-state of the coaxial switch.

[0044] The circuit control mechanism 3 is a TTL self-off control circuit. The circuit control mechanism 3 is provided with a plurality of power control ports, wherein the power control ports adopt solder pins 31, and the plurality of power control ports extend outside the shell. The circuit control mechanism 3 realizes the on-keeping and off-current of the six groups of output electromagnetic iron assemblies 21 or the six groups of load electromagnetic iron assemblies 22 in the electromagnetic driving mechanism.

[0045] The TTL self-off control circuit is adopted to realize the on-keeping and off-current of the six channels (TTL1-6). The circuit control port wiring and function description are shown in Table 1 as follows:

[0046]

[0047]

[0048] Table 1 Function description of each power control port

[0049] The microwave transmission mechanism includes an input coaxial interface 41, six output coaxial interfaces 42, six load interfaces 43, and six groups of reed assemblies.

[0050] The input coaxial interface 41, the six output coaxial interfaces 42, and the six load interfaces 43 are fixed outside the base 12 of the shell, and the center inner conductor of the input coaxial interface 41, the center inner conductor of the output coaxial interface 42, and the inner conductor of the load interface 43 extend into the microwave cavity 12c of the base 12.

[0051] The input coaxial interface 41 and the six output coaxial interfaces 42 of the microwave transmission mechanism adopt SMA jack connectors, and the six load interfaces 43 are provided with 50Ω load resistors.

[0052] The six output coaxial interfaces 42 and the six load interfaces 43 are uniformly distributed along the input coaxial interface 41 as the center. The connecting line from the projection center point of the input coaxial interface 41 on the base 12 of the shell to the projection center point of the output coaxial interface 42 on the base 12 of the shell is not collinear with the connecting line from the projection center point of the corresponding input coaxial interface 41 on the base 12 of the shell to the projection center point of the corresponding load interface 43 on the base 12 of the shell, and the length of the connecting line from the projection center point of the input coaxial interface 41 on the base 12 of the shell to the projection center point of the output coaxial interface 42 on the base 12 of the shell is greater than the length of the connecting line from the projection center point of the corresponding input coaxial interface 41 on the base 12 of the shell to the projection center point of the corresponding load interface 43 on the base 12 of the shell.

[0053] The connection between the input coaxial interface 41, the corresponding output coaxial interface 42 and the corresponding load interface 43 forms a "7" shape in sequence. The "7" shape structure effectively reduces the outer diameter of the microwave transmission assembly, meets the requirement of miniaturization of the switch, and solves the matching problem of the radio frequency coaxial transmission line and the coaxial load.

[0054] The six output coaxial interfaces 42, the six load interfaces 43 and the six spring piece assemblies correspond to each other. The spring piece assembly includes a first microwave spring piece 44a, a second microwave spring piece 44b, a first spring 44c, a first push rod 44e, a second spring 44d and a second push rod 44f. The first microwave spring piece 44a and the second microwave spring piece 44b are located in the microwave cavity 12c. The lower end of the first push rod 44e extends into the microwave cavity 12c and is fixedly connected with the first microwave spring piece 44a. The upper end of the first push rod 44e extends to the cavity of the shell. The first spring 44c is sleeved on the first push rod 44e. The first spring 44c is respectively abutted between the upper end of the first push rod 44e and the base 12 of the shell. The two ends of the first microwave spring piece 44a are respectively aligned with the center inner conductor of the input coaxial interface 41 and the center inner conductor of the corresponding output coaxial interface 42.

[0055] The lower end of the second push rod 44f extends into the microwave cavity 12c and is fixedly connected with the second microwave spring piece 44b. The upper end of the second push rod 44f extends to the cavity of the shell. The second spring 44d is sleeved on the second push rod 44f. The second spring 44d is respectively abutted between the upper end of the second push rod 44f and the base 12 of the shell. The two ends of the second microwave spring piece 44b are respectively aligned with the center inner conductor of the corresponding output coaxial interface 42 and the corresponding load inner conductor.

[0056] The first microwave spring piece 44a and the first push rod 44e are hot riveted in the microwave transmission mechanism. The second microwave spring piece 44b and the second push rod 44f are hot riveted. For the conventional push rod clamping fixed mode, the longitudinal space is reduced, which is suitable for the miniaturization design of the product, ensures the consistency of the push rod movement, and improves the reliability of the product.

[0057] In the initial state, the two ends of the first microwave spring piece 44a are not in contact with the center inner conductor of the input coaxial interface 41 and the center inner conductor of the corresponding output coaxial interface 42. The two ends of the second microwave spring piece 44b are also not in contact with the center inner conductor of the corresponding output coaxial interface 42 and the corresponding load inner conductor.

[0058] The several transmission assemblies 23 of the electromagnetic drive mechanism correspond to the several spring piece assemblies of the microwave transmission mechanism. The pressing ends of the two ends of the movable spring piece 23b of the transmission assembly 23 are respectively aligned with the first push rod 44e and the second push rod 44f of the corresponding spring piece assembly. The movable spring piece 23b of the transmission assembly 23 can only cooperate with the first push rod 44e or the second push rod 44f at the same time.

[0059] The coaxial switch is single-pole six-throw magnetic retaining structure, and a radio frequency terminal matches a load, that is, each channel is a set of magnetic retaining type single-pole double-throw system. The coaxial switch can be realized through six sets of output electromagnet assemblies 21 and six sets of load electromagnet assemblies 22. An integrated electromagnetic driving mechanism is designed, and the external magnetic circuits of each battery system are connected together, so that the electromagnetic driving force is smaller in size under the premise of ensuring reliable action.

[0060] The above is only one embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of variations and improvements can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. A single-pole multi-throw coaxial switch with load end, characterized in that: comprising a shell, a circuit control mechanism, an electromagnetic drive mechanism and a microwave transmission mechanism; the shell comprises a cover and a base, a cavity is formed between the cover and the base, the circuit control mechanism and the electromagnetic drive mechanism are arranged in the cavity, and a microwave cavity is formed in the base of the shell; the electromagnetic drive mechanism comprises a plurality of output electromagnet assemblies, a plurality of load electromagnet assemblies and a plurality of transmission assemblies, the plurality of output electromagnet assemblies, the plurality of load electromagnet assemblies and the plurality of transmission assemblies are one-to-one corresponding, the output electromagnet assemblies and the load electromagnet assemblies are the same in structure and respectively comprise a magnetic steel, an iron core, a coil and a yoke, the transmission assembly comprises an armature and a moving spring leaf, the moving spring leaf is fixed on the armature, the armature is hinged on the base of the shell, the two ends of the armature are provided with attracting ends, the two attracting ends of the armature are matched with the iron cores of the corresponding output electromagnet assemblies and the iron cores of the corresponding load electromagnet assemblies respectively, and the two ends of the moving spring leaf are pressing ends. The circuit control mechanism is provided with a plurality of power control ports, the plurality of power control ports extend to the outside of the shell, and the circuit control mechanism realizes the control of the on-keeping or off-current of the plurality of output electromagnet assemblies or the plurality of load electromagnet assemblies in the electromagnetic drive mechanism. The microwave transmission mechanism comprises an input coaxial interface, a plurality of output coaxial interfaces, a plurality of load interfaces and a plurality of spring leaf assemblies. The input coaxial interface, the plurality of output coaxial interfaces and the plurality of load interfaces are fixed on the outside of the base of the shell, and the center inner conductors of the input coaxial interface, the center inner conductors of the output coaxial interface and the inner conductors of the load interface extend into the microwave cavity of the base. The plurality of output coaxial interfaces, the plurality of load interfaces and the plurality of spring leaf assemblies are one-to-one corresponding, the spring leaf assembly comprises a first microwave spring leaf, a second microwave spring leaf, a first spring, a first push rod, a second spring and a second push rod, the first microwave spring leaf and the second microwave spring leaf are in the microwave cavity, the lower end of the first push rod extends into the microwave cavity and is fixedly connected with the first microwave spring leaf, the upper end of the first push rod extends to the cavity of the shell, the first spring is sleeved on the first push rod, the first spring is respectively abutted between the upper end of the first push rod and the base of the shell, and the two ends of the first microwave spring leaf are respectively aligned with the center inner conductor of the input coaxial interface and the center inner conductor of the corresponding output coaxial interface. The lower end of the second push rod extends into the microwave cavity and is fixedly connected with the second microwave spring leaf, the upper end of the second push rod extends to the cavity of the shell, the second spring is sleeved on the second push rod, the second spring is respectively abutted between the upper end of the second push rod and the base of the shell, and the two ends of the second microwave spring leaf are respectively aligned with the center inner conductor of the corresponding output coaxial interface and the corresponding load inner conductor. The plurality of transmission assemblies of the electromagnetic drive mechanism correspond to the plurality of spring leaf assemblies of the microwave transmission mechanism, the pressing ends of the two ends of the moving spring leaf of the transmission assembly are respectively aligned with the first push rod and the second push rod of the corresponding spring leaf assembly, and the moving spring leaf of the transmission assembly can only cooperate with the first push rod or the second push rod at the same time. 2.The single-pole multi-throw coaxial switch with load end according to claim 1, characterized in that: ​ ​ ​ The circuit control mechanism is a TTL self-off control circuit, wherein the power control port adopts a solder pin.

3. The single-pole multi-throw coaxial switch with load terminals according to claim 1, characterized in that: The input coaxial interface and the output coaxial interfaces of the microwave transmission mechanism adopt SMA jack connectors, and the load interface is provided with a 50Ω load resistor.

4. The single-pole multi-throw coaxial switch with load terminals according to claim 1, characterized in that: The output coaxial interfaces and the load interfaces are uniformly distributed along the input coaxial interface as the center.

5. The single-pole multi-throw coaxial switch with load terminals according to claim 1, characterized in that: The line connecting the projection center point of the input coaxial interface on the base of the shell to the projection center point of the output coaxial interface on the base of the shell is not collinear with the line connecting the projection center point of the corresponding input coaxial interface on the base of the shell to the projection center point of the corresponding load interface on the base of the shell, and the length of the line connecting the projection center point of the input coaxial interface on the base of the shell to the projection center point of the output coaxial interface on the base of the shell is greater than the length of the line connecting the projection center point of the corresponding input coaxial interface on the base of the shell to the projection center point of the corresponding load interface on the base of the shell.

6. The single-pole multi-throw coaxial switch with load terminals according to claim 1, characterized in that: The first microwave spring plate and the first push rod are hot riveted, and the second microwave spring plate and the second push rod are hot riveted.

7. The single-pole multi-throw coaxial switch with load terminals according to claim 1, characterized in that: The base of the shell comprises a cavity cover and a seat body, the seat body is provided with a groove on the end face close to the cavity side, the cavity cover is fixedly connected to the end face close to the cavity side of the seat body, and the seat body and the cavity cover form a microwave cavity.

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