Ultra-wideband cavity directional coupler

Abstract

The invention provides an ultra-wideband cavity directional coupler, and relates to the technical field of couplers. The ultra-wideband cavity directional coupler comprises a shell, two ends of the shell are provided with an input end and a straight-out end, one side of the shell is provided with a coupling end, the input end and the straight-out end slide in the shell in a sealed mode, two partition plates are fixedly connected in the shell in parallel, and the two partition plates are connected with the coupling end in a sealed mode. The two partition plates isolate the range where the main transmission rod and the auxiliary transmission rod are located into resonant cavities. The side, away from the coupling end, of the shell is provided with an active displacement assembly, the two ends of the active displacement assembly are fixedly arranged on the input end and the straight-out end in a sleeving mode respectively, and the active displacement assembly can generate stroke-limited relative displacement on the shell. The active displacement assembly enables the input end, the main transmission rod and the straight output end to move synchronously in the same direction, and the bandwidth is adjusted by adjusting the distance between the main transmission rod and the auxiliary transmission rod.

Description

Technical Field

[0001] This application relates to the technical field of couplers, and more particularly, to an ultra-wideband cavity directional coupler. Background Art

[0002] In the existing methods for adjusting the bandwidth of cavity directional couplers, a tuning screw is mostly rotated and installed on the side wall of the housing, so that the tuning screw extends into the resonant cavity and abuts against the main metal rod to reduce the distance between the two metal rods, thereby increasing the bandwidth.

[0003] However, since the two ends of the metal rod are fixedly connected to the ports respectively, the long-term abutment of the tuning screw will cause irreversible deformation of the metal rod, affecting the service life of the directional coupler. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application provides an ultra-wideband cavity directional coupler, which includes a housing. Input ends and direct output ends are symmetrically arranged at both ends of the housing. A coupling end is arranged on one side of the housing, and the coupling end is close to the direct output end. A main transmission rod is fixedly connected between the input end and the direct output end. A secondary transmission rod is arranged in parallel on one side of the main transmission rod. One end of the secondary transmission rod is fixedly connected to the coupling end, and the other end of the secondary transmission rod is fixedly connected to the inside of the housing and serves as an isolation end. The input end and the direct output end are hermetically slidable in the housing. Two partition plates are fixedly connected in parallel in the housing along the length direction of the main transmission rod. The two partition plates isolate the range where the main transmission rod and the secondary transmission rod are located into a resonant cavity; the two connection ends of the secondary transmission rod respectively penetrate through one of the partition plates in a sealed manner; an active displacement assembly is arranged on the side of the housing away from the coupling end, and both ends of the active displacement assembly are fixedly sleeved with the input end and the direct output end respectively, and the active displacement assembly can have a limited stroke of relative displacement on the housing.

[0005] Preferably, the input end and the direct output end have exactly the same structural size. A cylindrical pin is coaxially arranged inside the input end, and the end of the input end that is hermetically slidably connected to the housing is a flange.

[0006] Preferably, the coupling end has the same structure as the input end and the direct output end, and the coupling end is fixedly connected to the housing.

[0007] Preferably, the isolation end is arranged inside the housing, and the isolation end is a single-lead flange type resistor.

[0008] Preferably, chutes are symmetrically arranged at both ends of the housing, the chutes penetrate through the housing, and the cylindrical pin slidably penetrates through the chutes and is connected to a sliding plate.

[0009] Preferably, the two slides are respectively connected to the ends of the two partitions in a sealing and sliding manner, the two slides are sealingly slidable on the shell, and the two slides are respectively fixedly connected to the two ends of the main transmission rod.

[0010] Preferably, two groups of storage cavities are symmetrically arranged inside the shell, each group of the storage cavities consists of two storage cavities arranged along the width direction of the shell, and the two slides are respectively sealed and slidably inserted in the two groups of storage cavities.

[0011] Preferably, the flange always covers the slide groove during the displacement process, and the two ends of the slide plate never separate from the two receiving cavities during the displacement process.

[0012] Preferably, an installation range is left between the outer sides of the two partitions and the side walls of the shell.

[0013] Preferably, the active displacement assembly includes a connecting rod, two retaining rings, an adjusting nut and an auxiliary rod, the connecting rod is arranged on a side of the shell away from the coupling end; the two retaining rings are fixedly sleeved on the insulating parts of the input end and the straight output end respectively; the adjusting nut is threadedly connected to the connecting rod, and the adjusting nut is threadedly connected to the shell; the auxiliary rod is fixedly connected to the shell, and the connecting rod is slidably sleeved on the auxiliary rod.

[0014] The beneficial effects of the present invention are:

[0015] 1. The relative displacement of the active displacement component relative to the housing can cause the input end, the main transmission rod and the straight-out end to displace synchronously in the same direction, so that the main transmission rod and the auxiliary transmission rod can be relatively displaced. By adjusting the spacing between the main transmission rod and the auxiliary transmission rod, the bandwidth can be adjusted;

[0016] 2. The limited travel of the active displacement assembly relative to the housing is used to prevent the main transmission rod from being too close to the auxiliary transmission rod when the main transmission rod is displaced toward the auxiliary transmission rod, which would cause excessive coupling and mutual interference of the electromagnetic field, thus reducing the bandwidth.

[0017] 3. Use active displacement components to synchronously drive the input end, main transmission rod and straight-out end to move in the same direction, so as to avoid the main transmission rod from tilting when it moves, which will affect the degree of interaction of the coupling structure in the coupler, and affect the coupling degree, bandwidth, isolation, insertion loss and directivity of the coupler;

[0018] 4. Use two partitions to cooperate with the shell to form a resonant cavity, so that the main transmission rod and the auxiliary transmission rod are located in a smooth cavity, reducing the scattering loss of electromagnetic waves on the wall surface, making the electromagnetic waves reflect more regularly when propagating in the cavity, reducing additional losses and undesired resonant modes, and improving the stability of the bandwidth.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic diagram of the overall structure of an ultra-wideband cavity directional coupler according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the internal structure of an ultra-wideband cavity directional coupler according to an embodiment of the present application;

[0023] Figure 3 is an exploded view of the structure of an ultra-wideband cavity directional coupler according to an embodiment of the present application Figure 1 ;

[0024] Figure 4 is an exploded view of the structure of an ultra-wideband cavity directional coupler according to an embodiment of the present application Figure 2 ;

[0025] Figure 5 is a partial exploded view of the structure of an ultra-wideband cavity directional coupler according to an embodiment of the present application;

[0026] Figure 6 is according to an embodiment of the present application Figure 5 an enlarged schematic view of A therein;

[0027] Figure 7 is an exploded view of the structure of the active sealing assembly according to an embodiment of the present application;

[0028] Figure 8 is a schematic view of the active sealing assembly on the partition board according to an embodiment of the present application;

[0029] Figure 9 is according to an embodiment of the present application Figure 7 an enlarged schematic view of B therein;

[0030] Figure 10 is according to an embodiment of the present application Figure 7 an enlarged schematic view of C therein;

[0031] Figure 11According to an embodiment of the present application Figure 8 An enlarged schematic diagram of D in

[0032] Icon: 1. Housing; 11. Input end; 111. Cylindrical pin; 112. Flange; 12. Straight output end; 13. Coupling end; 14. Isolation end; 15. Slide groove; 16. Slide plate; 17. Storage cavity; 18. Notch part; 2. Main transmission rod; 3. Sub transmission rod; 4. Partition board; 41. First clamping strip; 42. Second clamping strip; 5. Active displacement assembly; 51. Connecting rod; 52. Snap ring; 53. Adjusting nut; 54. Auxiliary rod; 6. Active sealing assembly; 61. First pressing rod; 611. First sealing pad; 612. First abutting plate; 613. First guide rod; 614. First spring; 62. Second pressing rod; 621. Second sealing pad; 63. First support rod; 64. Second support rod; 65. Pressing nut; 651. Hinge seat. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0035] Embodiment 1, as Figures 1 - 11 shown, a ultra-wideband cavity directional coupler according to an embodiment of the present application includes a housing 1. An input end 11 and a straight output end 12 are symmetrically arranged at both ends of the housing 1. A coupling end 13 is arranged on one side of the housing 1, and the coupling end 13 is close to the straight output end 12. A main transmission rod 2 is fixedly connected between the input end 11 and the straight output end 12. A sub transmission rod 3 is arranged in parallel on one side of the main transmission rod 2. One end of the sub transmission rod 3 is fixedly connected to the coupling end 13, and the other end of the sub transmission rod 3 is fixedly connected to the inside of the housing 1 and serves as an isolation end 14. It should be noted that the main transmission rod 2 and the sub transmission rod 3 are metal rods, and the structural designs of the main transmission rod 2 and the sub transmission rod 3 are prior art and will not be elaborated here.

[0036] In a specific embodiment of the present application, the input end 11 and the straight output end 12 are hermetically slidable in the housing 1, where as Figures 2 - 5As shown, two partitions 4 are fixedly connected in parallel along the length direction of the main transmission rod 2 inside the housing 1, and the two partitions 4 isolate the range where the main transmission rod 2 and the secondary transmission rod 3 are located into a rectangular resonant cavity; there is an installation gap between the outer sides of the two partitions 4 and the side wall of the housing 1, so as to ensure that the internal structure of the resonant cavity will not change.

[0037] In a specific embodiment of the present application, the two connection ends of the secondary transmission rod 3 respectively penetrate through one of the partitions 4 in a sealed manner, so as to facilitate the fixed connection of the two ends of the secondary transmission rod 3 to the coupling end 13 and the isolation end 14 respectively.

[0038] Specifically, an active displacement assembly 5 is provided on one side of the housing 1 away from the coupling end 13. The two ends of the active displacement assembly 5 are respectively fixedly sleeved with the input end 11 and the direct output end 12. The active displacement assembly 5 can have a relative displacement with a limited stroke on the housing 1. Thus, when the active displacement assembly 5 moves closer to or away from the housing 1, it will synchronously drive the input end 11, the output end 12 and the main transmission rod 2 to displace synchronously and in the same direction.

[0039] Among them, as Figures 1 - 5 shown, the structures and sizes of the input end 11 and the direct output end 12 are exactly the same. A cylindrical pin 111 is coaxially arranged inside the input end 11, and one end of the input end 11 that is in sealed sliding connection with the housing 1 is a flange 112.

[0040] Furthermore, the coupling end 13 has the same structure as the input end 11 and the direct output end 12, and the coupling end 13 is fixedly connected to the housing 1.

[0041] Among them, the isolation end 14 is arranged inside the housing 1, and the isolation end 14 is a single-lead flange type resistor.

[0042] Furthermore, sliding grooves 15 are symmetrically arranged at both ends of the housing 1. The sliding grooves 15 penetrate through the housing 1. The cylindrical pin 111 slides through the sliding grooves 15 and is connected with a sliding plate 16. It should be noted that in a specific embodiment of the present application, the sliding plate 16 is made of a metal structure and can cooperate with the partition 4 and the housing 1 to form a resonant cavity.

[0043] Furthermore, the two sliding plates 16 are respectively in sealed sliding connection with the ends of the two partitions 4, and the two sliding plates 16 slide in the housing 1 in a sealed manner, so that the resonant cavity will form a sealed state.

[0044] And the two sliding plates 16 are respectively fixedly connected to both ends of the main transmission rod 2. Thus, a fixed connection is formed between the input end 11, the direct output end 12 and the main transmission rod 2, enabling the smooth transmission of microwaves.

[0045] As Figure 5 and Figure 6As shown, two sets of storage cavities 17 are symmetrically arranged inside the housing 1. Each set of storage cavities 17 consists of two storage cavities 17 arranged along the width direction of the housing 1. Two sliding plates 16 are respectively and hermetically slidably inserted into the two sets of storage cavities 17.

[0046] It should be noted that in the specific embodiment of the present application, the flange 112 always covers the chute 15 during the displacement process, and both ends of the sliding plate 16 never break away from the two storage cavities 17 during the displacement process. In this way, the sealing performance of the resonant cavity is ensured.

[0047] As Figures 1 - 5 shown, the active displacement assembly 5 includes a connecting rod 51, two snap rings 52, an adjusting nut 53 and an auxiliary rod 54. The connecting rod 51 is arranged on the side of the housing 1 away from the coupling end 13; the two snap rings 52 are respectively fixedly sleeved on the insulating parts of the input end 11 and the direct output end 12; the adjusting nut 53 is threadedly connected to the connecting rod 51 and is also threadedly connected to the housing 1; the auxiliary rod 54 is fixedly connected to the housing 1, and the connecting rod 51 is slidably sleeved on the auxiliary rod 54.

[0048] The following describes the usage process of an ultra-wideband cavity directional coupler according to an embodiment of the present application with reference to the accompanying drawings:

[0049] When in specific use, the adjusting nut 53 can be rotated to drive the connecting rod 51 to synchronously drive the two snap rings 52 to displace axially along the auxiliary rod 54. At this time, the input end 11, the straight output end 12, the main transmission rod 2 and the two sliding plates 16 will be synchronously displaced. In this application, the case where the connecting rod 51 approaches the housing 1 is taken as an example for illustration. When the above components are displaced, the cylindrical pin 111 will displace along the chute 15, and the flange 112 will be synchronously displaced and always cover the chute 15. At the same time, the sliding plate 16 will slide in the two accommodating cavities 17 adapted to itself and always keep the sliding plate 16 from separating from the accommodating cavity 17. The main transmission rod 2 will synchronously follow the sliding plates 16 at both ends and approach the sub-transmission rod 3. It should be noted that due to the limited stroke of the connecting rod 51, it can be understood that in the specific embodiment of this application, when the main transmission rod 2 approaches the sub-transmission rod 3, the distance between the two will not be too close, so as to avoid excessive coupling and mutual interference of the electromagnetic field. It can be understood that in the specific embodiment of this application, because the distance between the main transmission rod 2 and the sub-transmission rod 3 becomes smaller, the electromagnetic field coupling effect between them is enhanced. The stronger coupling can enable more signals of different frequencies to be effectively coupled, so that the cavity directional coupler can work normally in a wider frequency range, thereby increasing the bandwidth. At the same time, the resonant characteristics of the cavity directional coupler are affected by the distance between the main transmission rod 2 and the sub-transmission rod 3. A smaller distance will change the resonant mode in the cavity and make the resonant frequency range wider. And the working bandwidth of the directional coupler is related to the resonant frequency range, so the bandwidth can be expanded. When the distance increases, the resonant frequency range becomes narrower, restricting the working bandwidth and making it narrower. Of course, this relationship is not absolute and will also be comprehensively affected by other factors such as the size and shape of the resonant cavity, the physical characteristics of the main transmission rod 2 and the sub-transmission rod 3 themselves, and the coupling window. In actual design and application, these factors need to be comprehensively considered. The HFSS technology (the HFSS technology is an existing technology, and how to perform simulation optimization specifically is well-known to those skilled in the art and will not be elaborated in this application) can be used to perform simulation optimization to optimize the distance between the main transmission rod 2 and the sub-transmission rod 3 to meet the required bandwidth index. In the specific embodiment of this application, the comprehensive influence of other factors such as the size and shape of the resonant cavity, the physical characteristics of the main transmission rod 2 and the sub-transmission rod 3 themselves, and the coupling window is not considered temporarily. In the specific embodiment of this application, with this design, the relative displacement of the active displacement assembly 5 relative to the housing 1 can make the input end 11, the main transmission rod 2 and the straight output end 12 displace synchronously in the same direction, causing a relative displacement between the main transmission rod 2 and the sub-transmission rod 3. By adjusting the distance between the main transmission rod 2 and the sub-transmission rod 3, the adjustment of the bandwidth can be realized, and the irreversible deformation of the main transmission rod 2 caused by the long-term abutment of the tuning screw against the main transmission rod 2 can be avoided, thereby avoiding affecting the service life of the cavity directional coupler;Meanwhile, by utilizing the displacement with limited stroke of the active displacement component 5 relative to the housing 1, when the main transmission rod 2 displaces towards the sub-transmission rod 3, the distance between the two is prevented from being too close, which may cause excessive coupling and mutual interference of the electromagnetic field, resulting in a decrease in bandwidth. By synchronously driving the input end 11, the main transmission rod 2, and the direct output end 12 to displace in the same direction by the active displacement component 5, the main transmission rod 2 is prevented from tilting during displacement, which affects the degree of interaction of the coupling structure in the coupler and has an impact on the coupling degree, bandwidth, isolation, insertion loss, and directivity of the coupler. By forming a resonant cavity with two partition plates 4, the housing 1, and two sliding plates 16, the main transmission rod 2 and the sub-transmission rod 3 are located in a smooth cavity, reducing the scattering loss of electromagnetic waves on the wall surface, making the reflection of electromagnetic waves more regular during propagation in the cavity, reducing additional losses and unwanted resonant modes, and improving the stability of the bandwidth.

[0050] In the related art, for this ultra-wideband cavity directional coupler, since the sliding connection between the sliding plate 16 and the partition plate 4 will inevitably form a gap due to friction, resulting in a decrease in the sealing performance of the resonant cavity. As a result, external waves will penetrate and interfere with the internal signals.

[0051] Embodiment 2. According to some embodiments of the present application, as Figure 2 、 Figures 7 - 9 shown, two groups of active sealing components 6 are provided on both sides of the housing 1. The structures of the two groups of active sealing components 6 are the same. The active sealing component 6 includes a first pressing rod 61, a second pressing rod 62, and a pressing member. The first pressing rod 61 is limited to slide on the side of the partition plate 4 facing the installation part; the second pressing rod 62 is limited to slide on the side of the partition plate 4 facing the installation part; the pressing member is respectively hinged to the mutually approaching ends of the first pressing rod 61 and the second pressing rod 62, and the other end of the pressing member extends to the outside of the housing 1 and is threadedly connected to the housing 1.

[0052] Among them, as Figure 4 and Figure 8 shown, two first clamping strips 41 and two second clamping strips 42 are symmetrically provided on the mutually remote sides of the two partition plates 4. The two first clamping strips 41 are arranged up and down and fixedly connected to the partition plate 4 to form a first sliding track, and the two second clamping strips 42 are arranged up and down and fixedly connected to the partition plate 4 to form a second sliding track.

[0053] Specifically, the first pressing rod 61 is limited to slide between the two first clamping strips 41 (i.e., the first sliding track), and the second pressing rod 62 is limited to slide between the two second clamping strips 42 (i.e., the second sliding track).

[0054] It should be noted that in the specific embodiments of the present application, the sliding limit of the first pressing rod 61 and the second pressing rod 62 enables them to slide only along the length directions of their respective corresponding first sliding tracks and second sliding tracks.

[0055] As Figure 7 shown, first pressing rods 61 and second pressing rods 62 are fixedly connected with a first gasket 611 and a second gasket 621 at their ends away from each other respectively.

[0056] As Figure 6 shown, a notch 18 is provided between the partition 4 and the port of the storage cavity 17. It should be noted that the first gasket 611 and the second gasket 621 are respectively embedded in the notch 18.

[0057] It can be understood therefrom that by embedding the first gasket 611 and the second gasket 621 in the notch 18, the sealing performance between the sliding plate 16 and the partition 4 can be enhanced.

[0058] As Figures 7 - 9 shown, the pressing member includes a first rod 63, a second rod 64 and a pressing nut 65. One end of the first rod 63 is hinged to the first pressing rod 61; one end of the second rod 64 is hinged to the second pressing rod 62, and the second rod 64 is hinged to the first rod 63; the pressing nut 65 is threaded through the housing 1, and one end of the pressing nut 65 extending into the housing 1 is rotatably connected with a hinge seat 651, and the hinge seat 651 is hinged to the first rod 63 and the second rod 64.

[0059] Therefore, during specific use, by rotating the pressing nut 65, the pressing nut 65 is displaced towards the inside of the housing 1, so that the angle between the first rod 63 and the second rod 64 hinged thereto is increased, and the hinge seat 651 is simultaneously displaced towards the partition 4. The angle and position changes of the first rod 63 and the second rod 64 will simultaneously drive the first pressing rod 61 and the second pressing rod 62 to move away from each other along the first slideway and the second slideway respectively. In this way, the first gasket 611 and the second gasket 621 at their ends will be pressed against the sliding plate 16, and then the possible gap between the sliding plate 16 and the partition 4 will be sealed by the corresponding gaskets, and the adjustable action is used to assist the sealing between them to ensure the sealing performance of the resonant cavity and prevent external waves from infiltrating and causing signal interference, affecting the normal use of the cavity directional coupler.

[0060] In the related art, for this kind of ultra-wideband cavity directional coupler, if the force of the first gasket 611 and the second gasket 621 pressing against the sliding plate 16 is too large, a large frictional force will be formed between the first gasket 611 and the second gasket 621 and the corresponding sliding plate 16 respectively, affecting the normal sliding adjustment of the sliding plate 16, and at the same time, the wear of the first gasket 611 and the second gasket 621 will be aggravated due to the increase of the frictional force.

[0061] Embodiment 3. According to some embodiments of the present application, as Figure 10 andFigure 11 As shown, elastic structures with the same structure are provided between the first pressing rod 61 and the first gasket 611, and between the second pressing rod 62 and the second gasket 621.

[0062] Specifically, the elastic structure includes a first abutting plate 612, a first guiding rod 613, and a first spring 614. The first abutting plate 612 is arranged in a T shape. The first abutting plate 612 is fixedly connected to the first gasket 611. The first abutting plate 612 is slidably sleeved on two first clamping strips 41. One end of the first guiding rod 613 is fixedly connected to the first abutting plate 612, and the other end of the first guiding rod 613 is slidably inserted into the first pressing rod 61. The first spring 614 is sleeved on the first guiding rod 613, and both ends of the first spring 614 respectively abut against the first abutting plate 612 and the first pressing rod 61.

[0063] Therefore, it can be understood that when the pressing nut 65 is rotated to adjust the first gasket 611 and the second gasket 621 to tightly abut against the sliding plate 16, only one first pressing rod 61 is taken as an example in the specific embodiment of the present application for illustration. At this time, the first pressing rod 61 displaces towards the first abutting plate 612, while the first abutting plate 612 and the first gasket 611 thereon are blocked by the sliding plate 16. At this time, the first guiding rod 613 will slide into the first pressing rod 61. Thus, the first spring 614 is compressed at this time. Through the elastic function of the first spring 614, the first abutting plate 612 and the first gasket 611 thereon form an elastic abutment relative to the sliding plate 16, flexibly converting the rigid force applied in the direction of the first pressing rod 61, ensuring that while the first gasket 611 assists in sealing between the sliding plate 16 and the partition plate 4, it can also prevent a large frictional force from being formed between the first gasket 611 and the sliding plate 16 due to too large a force applied, affecting the normal displacement of the sliding plate 16.

[0064] In the specific embodiment of the present application, since the housing 1 forms installation parts on both sides inside the housing 1 through two partition plates 4 therein, and the adjusting nut 53 and the active sealing assembly 6 in the present application change inside the installation parts, thus, it will not affect the structural change inside the resonant cavity, avoiding the influence of several structural changes in the present application on signal transmission.

[0065] It should be noted that the specific model specifications of the main transmission rod 2, the auxiliary transmission rod 3, the adjusting nut 53, the pressing nut 65, the first gasket 611, the first spring 614, and the second gasket 621 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the field, so it will not be elaborated in detail.

[0066] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An ultra-wideband cavity directional coupler, comprising a shell (1), wherein an input end (11) and a straight-out end (12) are symmetrically arranged at two ends of the shell (1), a coupling end (13) is arranged on one side of the shell (1), and the coupling end (13) is close to the straight-out end (12), a main transmission rod (2) is fixedly connected between the input end (11) and the straight-out end (12), a secondary transmission rod (3) is arranged in parallel on one side of the main transmission rod (2), one end of the secondary transmission rod (3) is fixedly connected to the coupling end (13), and the other end of the secondary transmission rod (3) is fixedly connected to the inside of the shell (1) and is an isolation end (14), characterized in that: The input end (11) and the straight-out end (12) are sealed and slidably connected to the shell (1); two partitions (4) are fixedly connected in parallel along the length direction of the main transmission rod (2) in the shell (1); the two partitions (4) isolate the area where the main transmission rod (2) and the auxiliary transmission rod (3) are located to form a resonance cavity; The two connecting ends of the auxiliary transmission rod (3) are respectively sealed and penetrate through one of the partitions (4); An active displacement component (5) is arranged on a side of the housing (1) away from the coupling end (13); two ends of the active displacement component (5) are respectively fixedly mounted on the input end (11) and the straight-out end (12); and the active displacement component (5) can undergo relative displacement of a limited stroke on the housing (1).

2. The ultra-wideband cavity directional coupler according to claim 1, wherein The input end (11) and the straight-out end (12) are completely identical in structure and size; a cylindrical pin (111) is coaxially arranged inside the input end (11); and one end of the input end (11) and the housing (1) that are sealed and slidably connected is a flange (112).

3. The ultra-wideband cavity directional coupler according to claim 2, wherein The coupling end (13) has the same structure as the input end (11) and the direct output end (12), and the coupling end (13) is fixedly connected to the housing (1).

4. The ultra-wideband cavity directional coupler according to claim 1, wherein, The isolation end (14) is arranged inside the housing (1), and the isolation end (14) is a single-lead flange resistor.

5. The ultra-wideband cavity directional coupler according to claim 2, characterized in that, Slide grooves (15) are symmetrically arranged at both ends of the housing (1), the slide groove (15) passes through the housing (1), and the cylindrical pin (111) slides through the slide groove (15) and is connected to a slide plate (16).

6. The ultra-wideband cavity directional coupler according to claim 5, wherein The two slide plates (16) are respectively connected to the ends of the two partition plates (4) in a sealing and sliding manner, the two slide plates (16) are sealingly slidable on the shell (1), and the two slide plates (16) are respectively fixedly connected to the two ends of the main transmission rod (2).

7. The ultra-wideband cavity directional coupler according to claim 5, characterized in that, Two groups of storage chambers (17) are symmetrically arranged inside the shell (1), each group of storage chambers (17) is composed of two storage chambers (17) arranged along the width direction of the shell (1), and the two slide plates (16) are respectively sealed and slidably plugged into the two groups of storage chambers (17).

8. The ultra-wideband cavity directional coupler according to claim 7, characterized in that, The flange (112) always covers the slide groove (15) during the displacement process, and the two ends of the slide plate (16) always do not separate from the two receiving chambers (17) during the displacement process.

9. The ultra-wideband cavity directional coupler according to claim 1, wherein There is an installation gap between the outer sides of the two partitions (4) and the side wall of the housing (1).

10. The ultra-wideband cavity directional coupler according to claim 1, characterized in that, The active displacement assembly (5) includes: a connecting rod (51) which is arranged on the side of the housing (1) away from the coupling end (13); two snap rings (52) which are respectively fixedly sleeved on the insulating parts of the input end (11) and the direct output end (12); an adjusting nut (53) which is threadedly connected to the connecting rod (51) and is also threadedly connected to the housing (1); an auxiliary rod (54) which is fixedly connected to the housing (1), and the connecting rod (51) is slidably sleeved on the auxiliary rod (54).

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