DPDT microwave switch of relay structure

Abstract

The invention discloses a DPDT microwave switch of a relay structure, and relates to the field of microwave switches, a switch driving assembly comprises two driving rods which are arranged in a stacked mode, mover iron cores are arranged on the two driving rods in a stacked mode, a microwave assembly comprises four connectors and a switch connecting assembly composed of springs, the connectors are arranged in pairs, and the connectors are arranged in pairs. The switch is respectively connected with the two driving rods through a switch connecting assembly; the relay assembly is located above the microwave assembly and located between the two stacked driving rods. The relay assembly is provided with an annular inner cavity, a single winding coil is arranged in the annular inner cavity, and a stator iron core is arranged in the single winding coil. According to the structure, an electric field generated by electrifying a winding coil and a stator iron core are utilized to generate a magnetic attraction effect, so that the displacement of the two control rods is controlled, synchronous switching of double driving rods and double groups of connectors is controlled by a single winding, and the control precision and the control efficiency are improved.

Description

Technical Field

[0001] The present application relates to the field of microwave switches, and in particular to a DPDT microwave switch with a relay structure. Background Art

[0002] Microwave switches, also known as RF switches, are devices used in circuit systems to control the switching of microwave signal channels. RF and microwave switches are widely used in microwave test systems for signal routing between instruments and devices under test (DUTs). Combining switches into a switch matrix system allows signals from multiple instruments to be routed to a single or multiple DUTs. This enables multiple tests to be performed in the same setup, eliminating the need for frequent connections and disconnections. The entire test process can be automated, increasing throughput in high-volume production environments.

[0003] In related technologies, microwave switches can be categorized as single-pole, multiple-throw (SPMT), double-pole, double-throw (DPDT), and multi-throw (MPDT) switches based on the number of ports. Traditional relay-based DPDT microwave switches are controlled by two sets of electromagnetic relays and comprise a total of four coils. These switches are complex, bulky, and heavy. Furthermore, with multiple ports and multiple throws, synchronization between port switching and switching between on and off states is difficult. Considering the size of microwave switches and the space they occupy, the greater the number of ports and throws, the more difficult it is to implement. Summary of the Invention

[0004] The present invention provides a DPDT microwave switch with a relay structure, which solves the problem of asynchronous switching of microwave switch ports. The DPDT microwave switch with a relay structure includes a switch drive component, a microwave component, and a relay component.

[0005] The switch drive assembly includes two stacked drive rods, on which a mover core is stacked; the two drive rods are respectively used to control the on / off of a signal channel between a pair of microwave switch connectors;

[0006] The microwave assembly includes four connectors and a switch connection assembly composed of springs. The connectors are arranged in pairs and are respectively connected to the two driving rods through the switch connection assembly.

[0007] The relay assembly is located above the microwave assembly and between two stacked driving rods; the relay assembly is provided with an annular inner cavity, in which a single-winding coil is provided, and a stator core is provided inside the single-winding coil. When the single-winding coil is energized, an electric field is generated, which drives the mover core on the driving rod to move up and down.

[0008] Specifically, the driving rod includes a first driving rod close to the connector and a second driving rod away from the connector;

[0009] The first driving rods and the second driving rods are arranged alternately, and the two ends of each set of driving rods are respectively connected to the switch connection assembly.

[0010] Specifically, a protruding first mounting groove is provided on the first driving rod, and an upper mover core is provided in the first mounting groove; a protruding second mounting groove is provided on the second driving rod, and a lower mover core is provided in the second mounting groove;

[0011] The stator core is located between the upper mover core and the lower mover core, and a return spring is sleeved between the stator core and the lower mover core.

[0012] Specifically, the first driving rod is in an inverted U shape, the mounting groove is located at the center of the horizontal rod segment, and first mounting holes are opened on the two vertical rod segments. The first driving rod is connected to the switch connecting assembly through the first mounting holes.

[0013] Specifically, the second driving rod is a straight-line crossbar, and the mounting through hole is located at the center of the crossbar; second mounting holes are opened at both ends of the crossbar, and the second driving rod is connected to the switch connecting assembly through the second mounting holes.

[0014] Specifically, it also includes a drive control box, and four switch holes are opened on the cover plate; the connector and the switch connection assembly are located inside the cavity below the cover plate, and the switch connection assembly is respectively connected to the first drive rod and the second drive rod through the switch holes.

[0015] Specifically, the relay assembly includes two upper and lower annular yokes, the annular yokes forming an annular inner cavity, a coil skeleton is provided in the annular inner cavity, and the single-winding coil is wound on the coil skeleton;

[0016] A telescopic through hole is provided at the center of the coil skeleton, and the upper mover iron core and the lower mover iron core protrude into the telescopic through hole and move along the central axial direction of the telescopic through hole under the action of an electric field.

[0017] Specifically, a plurality of arc-shaped mounting seats are further provided on the drive control box, the arc-shaped mounting seats are arranged around the switch hole, and the annular yoke is arranged on the mounting seats;

[0018] The length of the first driving rod is greater than the diameter of the annular yoke.

[0019] Specifically, the switch connection assembly includes four radio frequency reeds, a push rod fixedly mounted on the radio frequency reeds, and a reaction spring sleeved on the push rod;

[0020] Both ends of the radio frequency reed correspond to the connectors respectively, and when the radio frequency reed contacts the contacts of the connector, the corresponding radio frequency path is conducted.

[0021] The beneficial effects of the technical solutions provided by the embodiments of the present application include at least the following: The present application utilizes the elastic force of the spring, the magnetic force generated between the windings when energized, and the iron core to design the structure of the drive rod and switch connection assembly. The coil windings are energized to generate an electric field. The two drive rods, with the help of the upper and lower mover iron cores installed, change their movement direction. Under the action of the electric field, they overcome the elastic force and switch the paired connector paths. This staggered arrangement improves structural integration and reduces device size. The switch connection assembly, composed of reaction springs, reduces the traditional coil assembly structure from four to one. Furthermore, only one relay is required for switching control of the two control rods, resulting in higher control efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a partial structural diagram of a DPDT microwave switch with a relay structure provided in an embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the structure of the relay assembly and the drive rod;

[0024] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0025] Figure 4 This is an exploded diagram of the relay assembly;

[0026] Figure 5 It is a structural diagram of the driving rod and the mover core;

[0027] Figure 6 It is a schematic diagram of the structure of the installation cover cavity and microwave components;

[0028] Figure 7 This is a structural diagram for installing an arc-shaped mounting base;

[0029] Figure 8 This is a schematic diagram of the structure of the relay assembly installed on the arc mounting base;

[0030] Figure 9 It is a structural diagram of microwave components and.

[0031] Figure numerals: 10, switch drive assembly; 11, drive rod; 12, first drive rod; 121, first mounting groove; 122, upper mover core; 123, first mounting hole; 13, second drive rod; 131, second mounting groove; 132, lower mover core; 133, second mounting hole; 20, microwave assembly; 21, connector; 22, switch connection assembly; 221, RF reed; 222, push rod; 223, reaction spring; 224, compression spring gasket; 30, relay assembly; 31, annular inner cavity; 32, single-winding coil; 33, annular yoke; 34, coil frame; 35, telescopic through hole; 36, stator core; 37, reset spring; 40, drive control box; 41, switch hole; 50, arc-shaped mounting seat. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0033] In this document, "plurality" refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0034] Figure 1 This is a partial structural diagram of a DPDT microwave switch with a relay structure provided in an embodiment of the present application, which does not include a cover plate and its cavity structure. The microwave switch is a double-pole double-throw functional switch structure, including a switch drive component 10, a microwave component 20, and a relay component 30. The switch drive component 10 includes two stacked drive rods 11, on which a mover core is stacked. The mover core can generate movement under the action of an electric field. The two drive rods 11 are respectively used to control the on and off of the signal channel between a pair of microwave switch connectors. The microwave component 20 includes four connectors 21 and a switch connection component 22 composed of springs. The connectors 21 are arranged in pairs and are respectively connected to the two drive rods 11 through the switch connection component 22.

[0035] Figure 2 This is a schematic diagram of the structure of the relay assembly and the drive rod. Figure 3 yes Figure 2 The cross-sectional view of AA in the figure, Figure 4This is an exploded diagram of a relay assembly. Relay assembly 30 is located above microwave assembly 20 and comprises two annular yokes 33 (upper and lower). These yokes 33 form an annular inner cavity 31, within which a coil bobbin 34 is located. A single-winding coil 32 is wound around the coil bobbin 34. A telescopic through-hole 35 is located in the center of the coil bobbin 34. This hole is used to accommodate two moving cores. When energized, the upper and lower ends of the telescopic through-hole 35 form an induction zone, where the two moving cores move under the influence of the induction field. The key to switching a double-pole switch lies in synchronization. By using two-pole drive rods for control and using a specific winding direction for the single-winding coils 32, rapid, synchronous switching is achieved. The two annular yokes 33 enclose the coil and bobbin structure, enclosing the magnetic circuit. This reduces magnetic leakage and improves magnetic attraction. Furthermore, the yokes provide excellent heat conduction for the coils.

[0036] Figure 5 : This is a schematic diagram of the structure of the drive rod and the movable core. The drive rod 11 includes a first drive rod 12 away from the connector 21 and a second drive rod 13 close to the connector 21. The first drive rod 12 and the second drive rod 13 are arranged in an alternating manner, and the two ends of each set of drive rods 11 are respectively connected to the switch connection assembly 22. For example, in some embodiments, the two drive rods 11 are arranged in a cross-shaped manner. A protruding first mounting groove 121 is provided on the first drive rod 12, and an upper movable core 122 is provided in the first mounting groove 121. Correspondingly, a protruding second mounting groove 131 is provided on the second drive rod 13, and a lower movable core 132 is provided in the second mounting groove 131. In this structure, the upper movable core 122 and the lower movable core 132 are stacked. In particular, the upper and lower movable cores are arranged in the two polarity regions of the telescopic through hole 35 corresponding to the induced electric field, in order to utilize the attraction between the electric field polarity and the core to achieve lifting or falling. In addition, in order to better achieve magnetic attraction, a stator core 36 can be placed in the coil frame 34. The stator core 36 is located between the upper mover core 122 and the lower mover core 132, and a reset spring 37 is connected between the stator core 36 and the lower mover core 132. The reset spring can prevent the stator core from falling, and combined with the switch connection assembly 22 composed of a spring to realize the on-off control of the connector 21.

[0037] In some embodiments, the first drive rod 12 is designed as an inverted U-shape, with the first mounting slot 121 located at the center of the horizontal rod segment and first mounting holes 123 defined in the two vertical rod segments. The first drive rod 12 is connected to the switch connection assembly 22 via the first mounting holes 123. Correspondingly, the second drive rod 13 is designed as a straight-line horizontal rod, with the second mounting slot 131 located at the center of the horizontal rod and second mounting holes 133 defined at each end of the horizontal rod. The second drive rod 13 is connected to the switch connection assembly 22 via the second mounting holes 133. When properly assembled, the protruding mounting slots on the two drive rods can be inserted into the upper and lower ends of the telescopic through-hole 35.

[0038] Combine Figure 6 and Figure 7 As shown, in some embodiments, to better protect the switch structure and stabilize the relay assembly 30, the device further includes a drive control box 40. The cover plate 40 is provided with four switch holes 41. The connector 21 and the switch connection assembly 22 are located within a cavity below the cover plate. The switch connection assembly 22 is connected to the first drive rod 12 and the second drive rod 13 through the switch holes 41.

[0039] In some embodiments, in order to facilitate the installation of the relay assembly 30, a plurality of arc-shaped mounting seats 50 are further provided on the drive control box 40. The arc-shaped mounting seats 50 are arranged around the switch hole 41, and the annular yoke 33 is provided on the mounting seats 50. Specifically, four arc-shaped mounting seats 50 can be selected and respectively provided between the four switch holes 41. In some embodiments, the two drive rods are inserted between two adjacent arc-shaped mounting seats 50 and are located just above the switch holes 41. In addition, because the first drive rod 12 is provided above the annular yoke 33, the diameter of the annular yoke 33 can be set to be smaller than the diameter of the circular ring surrounded by the four switch holes 41, and the two vertical rod sections of the U-shaped first drive rod 12 span the outside of the annular yoke 33 and correspond to the two switch holes 41. Figure 8 It is a structural diagram of the relay assembly installed on the arc mounting base.

[0040] See also Figure 9 Regarding the specific structure of the switch connection assembly, it depends on the positions of the four connectors. This application is designed to maximize space utilization and arrange the four connectors into a rectangular structure, so that the switch connection assembly is also arranged into a rectangular structure. The switch connection assembly 22 includes four RF reeds 221, a push rod 222 fixedly mounted on the RF reed 221, and a reaction spring 223 sleeved on the push rod 222. The four RF reeds 221 form a rectangular structure, and the four connectors 21 are distributed at the corners of the rectangle. When any RF reed falls, it can connect the paired connectors on both sides. For example Figure 9 The four contacts of connector A, connector B, connector C, and connector D represent switches of four microwave paths respectively.

[0041] Specifically, the push rod 222 can be positioned in the center of the RF reed 221 to ensure simultaneous conduction and shutdown. A reaction spring 223 is sleeved onto the push rod 222. Furthermore, a compression spring washer 224 can be sleeved onto the push rod 222, positioned between the reaction spring 223 and the drive rod during installation. The top end of the push rod 222 passes through the top surface of the cover plate 40, exposing portions of the reaction spring 223 and compression spring washer 224, facilitating installation and connection of the drive rod.

[0042] Working principle: During actual operation, when the coil winding is not excited, the first drive rod 12 fixes the RF reeds b and d in the upper position under the action of the reaction spring 223, and the corresponding microwave channel (the channel formed by connectors AB and CD) is disconnected; the force of the reset spring 37 is greater than the force of the reaction spring 223, and the second drive rod 13 fixes the RF reeds a and c at the bottom, and the corresponding RF channel (the channel formed by connectors AD and BC) is turned on. At this time, the switch is in state 1. When the coil winding is energized, the electromagnetic force drives the upper mover core 122 to move downward, and the lower mover core 132 to move upward, and fixes the RF reeds b and d in the lower position, and the corresponding RF channel is turned on; the RF reeds a and c are fixed in the upper position, and the RF channel is disconnected. The switch is in state 2.

[0043] In summary, the present application utilizes the elastic force of the spring, the magnetic force generated between the winding and the iron core to design the structure of the drive rod and switch connection assembly. The coil winding generates an electric field by turning on and off the power. The two drive rods change the movement direction of the two drive rods with the help of the upper and lower movable iron cores installed. Under the action of the electric field, they overcome the elastic force and switch the paired connector paths. The staggered arrangement of this structure can improve the structural integration and reduce the size of the equipment. The switch connection assembly composed of reaction springs reduces the traditional coil assembly structure from four to one, and the two control rods only need one relay to achieve switching control, which is also more efficient.

[0044] The above describes the preferred embodiments of the present invention; it should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention; therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A DPDT microwave switch with a relay structure, characterized in that: It includes a switch drive component (10), a microwave component (20), and a relay component (30); The switch drive assembly (10) comprises two stacked drive rods (11), on which a mover core is stacked; the two drive rods (11) are respectively used to control the on / off of a signal channel between a pair of microwave switch connectors; The microwave assembly (20) comprises four connectors (21) and a switch connection assembly (22), wherein the connectors (21) are arranged in pairs and are respectively connected to two driving rods (11) via the switch connection assembly (22); The relay assembly (30) is located above the microwave assembly (20) and between two stacked drive rods (11); the relay assembly (30) is provided with an annular inner cavity (31), a single winding coil (32) is provided in the annular inner cavity (31), a stator core (36) is provided inside the single winding coil (32), and the single winding coil (32) is energized to generate an electric field, thereby driving the mover core on the drive rod (11) to generate an upward and downward displacement.

2. The DPDT microwave switch with a relay structure according to claim 1, characterized in that: The driving rod (11) includes a first driving rod (12) away from the connector (21) and a second driving rod (13) close to the connector (21); The first driving rods (12) and the second driving rods (13) are arranged alternately, and the two ends of each set of driving rods are respectively connected to the switch connection assembly (22).

3. The DPDT microwave switch with a relay structure according to claim 2, characterized in that: A protruding first mounting groove (121) is provided on the first driving rod (12), and an upper mover iron core (122) is provided in the first mounting groove (121); a protruding second mounting groove (131) is provided on the second driving rod (13), and a lower mover iron core (132) is provided in the second mounting groove (131); The stator core (36) is located between the upper mover core (122) and the lower mover core (132), and a return spring (37) is sleeved between the stator core and the lower mover core (132).

4. The DPDT microwave switch with a relay structure according to claim 3, characterized in that: The first driving rod (12) is in an inverted U shape, the mounting groove (121) is located at the center of the horizontal rod segment, and the two vertical rod segments are provided with first mounting holes (123). The first driving rod (12) is connected to the switch connection assembly (22) through the first mounting holes (123).

5. The DPDT microwave switch with a relay structure according to claim 3, characterized in that: The second driving rod (13) is a straight-line crossbar, and the second mounting groove (131) is located at the center of the crossbar; second mounting holes (133) are provided at both ends of the crossbar, and the second driving rod (13) is connected to the switch connection assembly (22) through the second mounting holes (133).

6. The DPDT microwave switch with a relay structure according to claim 3, characterized in that: The invention also includes a drive control box (40), wherein the cover plate (40) is provided with four switch holes (41); the connector (21) and the switch connection assembly (22) are located inside a cavity below the cover plate (40), and the switch connection assembly (22) is connected to the first drive rod (12) and the second drive rod (13) respectively through the switch holes (41).

7. The DPDT microwave switch with a relay structure according to claim 6, characterized in that: The relay assembly (30) includes two upper and lower annular yokes (33), the annular yokes (33) forming an annular inner cavity (31), a coil skeleton (34) being provided in the annular inner cavity (31), and the single-winding coil (32) being wound on the coil skeleton (34); A telescopic through hole (35) is provided at the center of the coil frame (34); the upper mover iron core (122) and the lower mover iron core (132) protrude into the telescopic through hole (35) and move axially along the center of the telescopic through hole (35) under the action of an electric field.

8. The DPDT microwave switch with a relay structure according to claim 7, characterized in that: A plurality of arc-shaped mounting seats (50) are also provided on the drive control box (40), the arc-shaped mounting seats (50) are arranged around the switch hole (41), and the annular yoke (33) is arranged on the mounting seats (50); The length of the first driving rod (12) is greater than the diameter of the annular yoke (33).

9. The DPDT microwave switch with a relay structure according to claim 1, characterized in that: The switch connection assembly (22) comprises four radio frequency reeds (221), a push rod (222) fixedly mounted on the radio frequency reeds (221), and a reaction spring (223) sleeved on the push rod (222); Both ends of the radio frequency reed (221) correspond to the connector (21) respectively, and when the radio frequency reed (221) contacts the contact of the connector (21), the corresponding radio frequency path is connected.

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