Coaxial microstrip coupler

Abstract

The utility model relates to the technical field of communication, and provides a coaxial microstrip coupler, which comprises a main rod, an outer cavity, a microstrip circuit board and an adjustable coupling mechanism, the outer cavity is internally provided with an accommodating cavity, the main rod is arranged in the accommodating cavity, the outer wall of the outer cavity is provided with a coupling window, the coupling window corresponds to the main rod, and the coupling window corresponds to the microstrip circuit board. The accommodating cavity is communicated with the outside through the coupling window; the microstrip circuit board is installed on the outer wall of the outer cavity and blocks the coupling window. The adjustable coupling mechanism comprises a first conductor and a second conductor arranged on the first conductor in a sleeving mode, the first conductor can move relative to the second conductor in the axial direction of the second conductor so as to stretch into the coupling window, and the second conductor is arranged on the microstrip circuit board and electrically connected with the microstrip circuit board. According to the coaxial microstrip coupler provided by the utility model, a post-stage coupling degree adjusting circuit of the coupler can be omitted, the complexity of the circuit is reduced, and the reliability of the whole circuit is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication technical field especially provides a coaxial microstrip coupler. BACKGROUND

[0002] Coaxial microstrip coupler is a kind of radio frequency coupler combined coaxial structure and microstrip line technology, utilize the miniaturization advantage of low loss and low reflection of coaxial structure, play a key role in the radio frequency system needing to carry out signal distribution, synthesis or isolation.

[0003] The error caused by material and assembly precision can seriously affect the coupling degree of coupler, to solve the above problems, in the related technical field, by increasing adjustable potentiometer to adjust coupling degree, but this also leads to coupling circuit more complex, and it is difficult to have good stability under severe environment. UTILITY MODEL CONTENT

[0004] The utility model discloses a coaxial microstrip coupler, aim at solving the problem that the coupling degree of existing coupler is deviated due to material and installation precision etc.

[0005] To achieve the above object, the technical scheme adopted by the utility model is:

[0006] The application embodiment provides a coaxial microstrip coupler, comprising:

[0007] Main rod;

[0008] Outer cavity, the inside of the outer cavity has the accommodation cavity along the length direction of the main rod and is arranged, the main rod is located in the accommodation cavity, the outer wall of the outer cavity is equipped with coupling window, the coupling window corresponds with the main rod, the accommodation cavity is communicated with outside through the coupling window;

[0009] Microstrip circuit board, the microstrip circuit board is installed on the outer wall of the outer cavity and is blocked in the coupling window;

[0010] Adjustable coupling mechanism, the adjustable coupling mechanism includes first conductor and second conductor, the first conductor can be moved along the axial direction of the second conductor relative to the second conductor, to extend into the coupling window, the second conductor is located on the microstrip circuit board and is electrically connected with the microstrip circuit board.

[0011] The utility model discloses a beneficial effect: the utility model discloses a coaxial microstrip coupler, through the adjustable coupling mechanism of adding to realize the adjustable coupling degree.

[0012] In some embodiments, the first conductor and the second conductor are connected through threads.

[0013] Through the above technical scheme, the first conductor is connected with the second conductor through the thread cooperation, and the operation is simple, and the requirement of quick adjustment can be met.

[0014] In some embodiments, the first conductor includes a threaded part screwing with the second conductor and a screwing part arranged on the threaded part.

[0015] Through the above technical scheme, the screwing part is driven to rotate around the shaft relative to the second conductor by exerting force on the screwing part, so as to adjust the relative position of the threaded part and the main rod.

[0016] In some embodiments, the first conductor and the second conductor are gap fitted.

[0017] Through the above technical scheme, the first conductor and the second conductor are gap fitted, so that the first conductor can move along the axial direction of the second conductor.

[0018] In some embodiments, the adjustable coupling mechanism includes a limiting piece, and the limiting piece is used for limiting the movement of the first conductor relative to the second conductor.

[0019] Through the above technical scheme, after the relative position between the first conductor and the second conductor is fixed, in order to reduce the probability of relative movement of the first conductor and the second conductor again, the limiting piece is used to limit the movement of the first conductor relative to the second conductor.

[0020] In some embodiments, the limiting piece includes a colloid, and the colloid is coated between the first conductor and the second conductor.

[0021] Through the above technical scheme, the adhesive property of the colloid is used, and the gap between the first conductor and the second conductor is filled, so as to hinder the relative movement of the first conductor and the second conductor again.

[0022] In some embodiments, the limiting piece includes a nut structure, and the nut structure is screw connected with the first conductor and abuts against the second conductor.

[0023] By adopting the technical scheme, the reverse force is provided by the nut structure to reduce the probability of relative movement between the first conductor and the second conductor again.

[0024] In some embodiments, the microstrip circuit board has a coupling port and an isolation port, and the coupling port is used to proportionally acquire the signal of the main rod.

[0025] By adopting the technical scheme, the microstrip circuit board can couple out the signal of the main rod, and specifically, the signal of the main rod can be proportionally acquired at the coupling port.

[0026] In some embodiments, the microstrip circuit board is movably connected to the outer wall of the outer cavity, and the microstrip circuit board can move along the axial direction of the second conductor relative to the outer wall of the outer cavity.

[0027] By adopting the technical scheme, when the relative movement between the first conductor and the second conductor cannot occur again, the distance between the first conductor and the main rod can be changed by adjusting the distance between the microstrip circuit board and the outer wall of the outer cavity.

[0028] In some embodiments, the microstrip circuit board comprises a board body, a fastener penetrating through the board body and connected to the outer wall of the outer cavity, and an elastic member sleeved on the fastener, and opposite ends of the elastic member are respectively abutted against the board body and the outer wall of the outer cavity.

[0029] By adopting the technical scheme, the force is applied to the elastic member by the tightness of the fastener to adjust the distance between the microstrip circuit board and the outer wall of the outer cavity. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 The exploded schematic view of the coaxial microstrip line coupler after omitting the outer cavity is provided for the embodiments of the present application.

[0032] Figure 2 The cross-sectional view of the coaxial microstrip line coupler is provided for the first embodiment of the present application.

[0033] Figure 3 The cross-sectional view of the coaxial microstrip line coupler is provided for the second embodiment of the present application.

[0034] Figure 4The utility model provides cross section drawing of coaxial microstrip line coupler provided for embodiment three of the utility model;

[0035] Figure 5 The utility model provides cross section drawing of coaxial microstrip line coupler provided for embodiment four of the utility model;

[0036] Figure 6 The utility model provides cross section drawing of coaxial microstrip line coupler provided for embodiment five of the utility model.

[0037] In the drawing, various reference signs:

[0038] 10, outer cavity, 10a, accommodating cavity, 10b, coupling window;

[0039] 20, microstrip circuit board, 20a, coupling port, 20b, isolation port, 21, board, 22, fastener, 23, elastic member;

[0040] 30, adjustable coupling mechanism, 31, first conductor, 32, second conductor, 311, threaded portion, 312, screwing portion, 331, glue, 332, nut structure;

[0041] 40, main rod. DETAILED DESCRIPTION

[0042] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0043] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation of the utility model.

[0044] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0045] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can through intermediate medium indirectly connect, can be two element inside's intercommunication or two element's interaction relationship.For the ordinary skill in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0046] Coaxial microstrip coupler is a kind of radio frequency coupler combined with coaxial structure and microstrip line technology, utilize the low loss and low reflection miniaturization advantage of coaxial structure, in the radio frequency system needing to carry out signal distribution, synthesis or isolation, play a key role.

[0047] However, the coupling degree of coaxial microstrip coupler is deeply influenced by material, assembly environment and assembly precision, in order to solve the above problems, in the related technical field, by increasing adjustable potentiometer to adjust coupling degree, but this also leads to more complex coupling circuit, and it is difficult to have good stability under severe environment.

[0048] Therefore, the application provides a coaxial microstrip coupler, an adjustable coupling mechanism is additionally provided, specifically, the second conductor is arranged on the microstrip circuit board and electrically connected with the microstrip circuit board, the first conductor can relatively move along the axial direction of the second conductor, and then the first conductor can extend into the coupling window, the distance between the first conductor and the main rod is adjusted, so that the coupling degree is adjusted.

[0049] Please refer to Figure 1 And Figure 2 The embodiment of the application provides a coaxial microstrip coupler, which comprises a main rod 40, an outer cavity 10, a microstrip circuit board 20 and an adjustable coupling mechanism 30.

[0050] Here, the main rod 40 is a structure for transmitting signals, and the main rod 40 is located inside the outer cavity 10;The microstrip circuit board 20 is a board body with a microstrip circuit, and the adjustable coupling mechanism 30 is used for adjusting the coupling degree to realize that the coupling end of the microstrip circuit board 20 obtains the signal on the main rod 40 inside the outer cavity 10 in a certain proportion.

[0051] Specifically, the inner part of the outer cavity 10 has a receiving cavity 10a extending along the length direction of the main rod 40, the main rod 40 is arranged in the receiving cavity 10a, a coupling window 10b is arranged on the outer wall of the outer cavity 10 and corresponds to the main rod 40, and the receiving cavity 10a is in communication with the outside through the coupling window 10b; the microstrip circuit board 20 is mounted on the outer wall of the outer cavity 10 and blocks the coupling window 10b; the adjustable coupling mechanism 30 includes a first conductor 31 and a second conductor 32 sleeved on the first conductor 31, the first conductor 31 can move relative to the second conductor 32 along the axial direction of the second conductor 32 to extend into the coupling window 10b, and the second conductor 32 is arranged on the microstrip circuit board 20 and electrically connected with the microstrip circuit board 20.

[0052] Understandably, the coupling window 10b is an open hole structure, and the coupling window 10b should correspond to the main rod 40, that is, the main rod 40 in the receiving cavity 10a can be observed through the coupling window 10b. The through direction of the coupling window 10b is perpendicular to the length direction of the main rod 40, and the coupling window 10b penetrates the outer wall of the outer cavity 10.

[0053] The microstrip circuit board 20 can be mounted on the outer wall of the outer cavity 10 in a manner such as welding, bonding, screw connection, but is not limited thereto. Specifically, the microstrip circuit board 20 is connected to the outer wall of the outer cavity 10 at the hole opening around the coupling window 10b.

[0054] The corresponding position on the microstrip circuit board 20 should be provided with a through hole structure corresponding to the coupling window 10b, so as to meet the extension of the first conductor 31 into the receiving cavity 10a from the coupling window 10b.

[0055] The first conductor 31 and the second conductor 32 should be connected in a sleeved manner, that is, the first conductor 31 has a columnar structure, the second conductor 32 has a tubular structure, which is similar to a hole shaft matching structure, so that the first conductor 31 can move up and down along the axial direction of the second conductor 32 to adjust the distance between the first conductor 31 and the main rod 40. In addition, the second conductor 32 is in an electrical connection relationship with the microstrip circuit board 20, and the first conductor 31 is also in an electrical connection relationship with the second conductor 32, so that the coupling degree of the whole can be adjusted when the first conductor 31 moves relative to the second conductor 32.

[0056] The first conductor 31 and the second conductor 32 can be connected in a gap matching manner, or the first conductor 31 and the second conductor 32 can also be connected in a threaded matching manner to adjust the relative moving position of the two.

[0057] For example, the first conductor 31 is a cylinder, and the second conductor 32 is provided with a circular hole, and the cylinder and the circular hole are connected in a gap matching manner, and under the action of an external force, the cylinder can move relative to the circular hole in the circular hole.

[0058] For example, the outer side wall of the first conductor 31 is provided with external threads, and the inner wall of the second conductor 32 is provided with internal threads matched with the external threads, the relative position of the two is adjusted by matching the external threads with the internal threads, and the feeding amount of the first conductor 31 can be further accurately controlled by adjusting the pitch.

[0059] The coaxial microstrip coupler provided by the utility model realizes adjustable coupling degree by additionally arranging the adjustable coupling mechanism 30. Specifically, the first conductor 31 can move along the axial direction of the second conductor 32, and can extend into the coupling window 10b. In this way, the distance between the first conductor 31 and the main rod 40 is adjustable, so that the coupling degree deviation caused by installation error, environmental temperature and material can be offset, the coupling degree adjustment circuit in the rear stage of the coupler is omitted, the complexity of the circuit is reduced, and the reliability of the overall circuit is higher.

[0060] In some embodiments, the first conductor 31 and the second conductor 32 are connected through threads.

[0061] It can be understood that the outer side wall of the first conductor 31 is provided with external threads, and the inner wall of the second conductor 32 is provided with internal threads matched with the external threads, and the relative position of the two is adjusted by matching the external threads with the internal threads.

[0062] In addition, the feeding amount of the first conductor 31 can be further accurately controlled by adjusting the whole pitch, for example, the first conductor 31 rotates one round around the shaft, and the feeding amount of the first conductor 31 relative to the main rod 40 is 0.5mm, etc.

[0063] Meanwhile, the matching precision of the thread connection is higher, and the controllability is stronger. In this way, the first conductor 31 moves relative to the second conductor 32 through the thread matching connection mode, the operation is simple, and the demand of rapid adjustment can be met.

[0064] Please refer to Figure 3 In some embodiments, the first conductor 31 comprises a threaded part 311 matched with the second conductor 32 and a screwing part 312 arranged on the threaded part 311.

[0065] It can be understood that the threaded part 311 is the matched part of the first conductor 31 and the second conductor 32, and is also the part of the first conductor 31 extending into the accommodating cavity 10a and coupled with the main rod 40. The screwing part 312 is the part subjected to force to drive the threaded part 311 to rotate around the shaft relative to the second conductor 32.

[0066] Here, the screwing part 312 can be a nut provided at the end of the threaded part 311 and meet the requirements of the national standard to meet the quick adaptation requirement with external tools; or, the screwing part 312 can also be a groove structure formed at the end of the threaded part 311, and the groove structure can also meet the quick adaptation requirement with external tools; or, the screwing part 312 can also be a screwing wrench provided at the end of the threaded part 311, that is, the operator can directly screw the screwing wrench by hand to realize the rotation of the threaded part 311 relative to the second conductor 32 around the axis.

[0067] Thus, the threaded part 311 is driven to rotate relative to the second conductor 32 around the axis by applying a force to the screwing part 312, so as to adjust the relative position of the threaded part 311 and the main rod 40.

[0068] In some embodiments, the first conductor 31 and the second conductor 32 are gap-fitted.

[0069] It can be understood that the gap fitting means that the two have a spacing that meets the relative movement, and at the same time, the first conductor 31 and the second conductor 32 can remain relatively stationary, so that the first conductor 31 and the second conductor 32 can be manufactured by using the hole-axle gap fitting tolerance in machining.

[0070] Thus, the gap fitting between the first conductor 31 and the second conductor 32 can realize the axial movement of the first conductor 31 relative to the second conductor 32 under the pushing action of the force.

[0071] Please refer to Figure 4 and Figure 5 In some embodiments, the adjustable coupling mechanism 30 includes a limiting part for limiting the movement of the first conductor 31 relative to the second conductor 32.

[0072] It can be understood that after the relative position between the first conductor 31 and the second conductor 32 is fixed, in order to reduce the probability of relative movement between the two again, the limiting part can be used to limit the movement of the first conductor 31 relative to the second conductor 32, thereby improving the stability of the coupling process.

[0073] Here, the limiting part can be a gel-like substance in an initial state of fluid, and the gel-like substance can be converted to a solid state after a period of oxidation or solidification, for example, the limiting part is epoxy resin, polyurethane, etc. Before the first conductor 31 moves relative to the second conductor 32, the surface of the first conductor 31 and / or the second conductor 32 is coated, and after the first conductor 31 moves relative to the second conductor 32, the epoxy resin, polyurethane, etc. is solidified to prevent the first conductor 31 from moving relative to the second conductor 32 again.

[0074] Alternatively, the limiting member can also be a structural member, such as a nut, a threaded sleeve, or the like, when the first conductor 31 has an external thread on its outer wall, the nut, the threaded sleeve, or the like is threadedly connected to the first conductor 31 and abuts against the second conductor 32, i.e., the first conductor 31 is prevented from moving relative to the second conductor 32 again by mechanical force.

[0075] Referring to Figure 4 In some embodiments, the limiting member includes a glue 331 coated between the first conductor 31 and the second conductor 32.

[0076] It can be understood that the glue 331 is filled in the gap between the first conductor 31 and the second conductor 32 by its own adhesive property to prevent the relative movement of the two again.

[0077] The glue 331 should have a certain fluidity in the initial state and be converted to a solid state after a period of oxidation or solidification to fill the gap between the first conductor 31 and the second conductor 32.

[0078] Referring to Figure 5 In some embodiments, the limiting member includes a nut structure 332 threadedly connected to the first conductor 31 and abutting against the second conductor 32.

[0079] It can be understood that the nut structure 332 is threadedly connected to the first conductor 31 and provides a reverse force to reduce the probability of the relative movement of the first conductor 31 and the second conductor 32 again.

[0080] Referring to Figure 1 In some embodiments, the microstrip circuit board 20 has a coupling port 20a and an isolation port 20b, and the coupling port 20a is used to obtain the signal of the main rod 40 in proportion.

[0081] Here, the microstrip circuit board can couple out the signal of the main rod 40, specifically, by adjusting the distance of the first conductor 31 moving towards the main rod 40 to realize the coupling port 20a obtaining the signal of the main rod 40 in proportion.

[0082] Referring to Figure 6 In some embodiments, the microstrip circuit board 20 is movably connected to the outer wall of the outer cavity 10, and the microstrip circuit board 20 can move along the axial direction of the second conductor 32 relative to the outer wall of the outer cavity 10.

[0083] It can be understood that when the relative movement between the first conductor 31 and the second conductor 32 cannot occur again, at this time, the position of the first conductor 31 relative to the main rod 40 needs to be adjusted, the connection mode between the microstrip circuit board 20 and the outer wall of the outer cavity 10 can be set to be movable, and then the distance change between the first conductor 31 and the main rod 40 is realized by adjusting the distance between the microstrip circuit board 20 and the outer wall of the outer cavity 10.

[0084] For example, an elastic pad can be arranged between the microstrip circuit board 20 and the outer wall of the outer cavity 10, and the microstrip circuit board 20 and the outer wall of the outer cavity 10 are connected by a screw, and the elastic pad is ensured to be in a certain degree of compression state, so that when the relative position of the first conductor 31 and the main rod 40 needs to be adjusted, the screw can be screwed to further compress or release the elastic pad.

[0085] For example, a spring can also be arranged between the microstrip circuit board 20 and the outer wall of the outer cavity 10, and the microstrip circuit board 20 and the outer wall of the outer cavity 10 are connected by a screw, and the screw is arranged in the corresponding spring, and in the initial state, the spring is in a certain degree of compression state, so that when the relative position of the first conductor 31 and the main rod 40 needs to be adjusted, the screw can be screwed to further compress or release the spring.

[0086] Please refer to Figure 6 In some embodiments, the microstrip circuit board 20 includes a plate body 21, a fastener 22 arranged in the plate body 21 and connected to the outer wall of the outer cavity 10, and an elastic element 23 sleeved on the fastener 22, and the opposite ends of the elastic element 23 are respectively abutted against the plate body 21 and the outer wall of the outer cavity 10.

[0087] It can be understood that the fastener 22 can be a screw or a pin, and the elastic element 23 can be an elastic pad, a spring, a spring sheet and the like. In the initial state, the elastic element 23 is in a certain degree of compression state, and when the relative position of the first conductor 31 and the main rod 40 needs to be adjusted, the fastener 22 can be screwed to further compress or release the elastic element 23.

[0088] In this way, the fastening of the fastener 22 is used to apply force to the elastic element 23 to adjust the distance between the microstrip circuit board 20 and the outer wall of the outer cavity 10.

[0089] The above is only a preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coaxial microstrip coupler, characterized by The utility model relates to a kind of adjustable coupling mechanism and microstrip circuit board, including: Main rod; Outer cavity, the inside of the outer cavity has accommodating cavity arranged along the length direction of the main rod, the main rod is located in the accommodating cavity, coupling window is set on the outer wall of the outer cavity, the coupling window corresponds with the main rod, the accommodating cavity is communicated with outside by the coupling window; Microstrip circuit board, the microstrip circuit board is installed on the outer wall of the outer cavity and is blocked in the coupling window; Adjustable coupling mechanism, the adjustable coupling mechanism includes first conductor and second conductor, the first conductor can be moved along the axial direction of the second conductor relative to the second conductor, to extend into the coupling window, the second conductor is located on the microstrip circuit board and is electrically connected with the microstrip circuit board.

2. The coaxial microstrip coupler of claim 1, wherein: The first conductor and the second conductor are connected by thread.

3. The coaxial microstrip coupler of claim 2, wherein: The first conductor includes threaded portion and screwing portion located in the threaded portion, and the threaded portion is screwed with the second conductor.

4. The coaxial microstrip coupler of claim 1, wherein: The first conductor and the second conductor are gap fit.

5. The coaxial microstrip coupler of claim 2 or 4, wherein: The adjustable coupling mechanism includes limiting piece, and the limiting piece is used to limit the movement of the first conductor relative to the second conductor.

6. The coaxial microstrip coupler of claim 5, wherein: The limiting piece includes colloid, and the colloid is coated between the first conductor and the second conductor.

7. The coaxial microstrip coupler of claim 5, wherein: The limiting piece includes nut structure, and the nut structure is screwed with the first conductor and abuts against the second conductor.

8. The coaxial microstrip coupler of any one of claims 1 to 4, wherein: The microstrip circuit board has coupling port and isolation port, and the coupling port is used to obtain the signal of the main rod in proportion.

9. The coaxial microstrip coupler of any one of claims 1 to 4, wherein: The microstrip circuit board is movably connected to the outer wall of the outer cavity, and the microstrip circuit board can be moved along the axial direction of the second conductor relative to the outer wall of the outer cavity.

10. The coaxial microstrip coupler of claim 9, wherein: The microstrip circuit board includes board body, fastener penetrating through the board body and connected to the outer wall of the outer cavity, and elastic member sleeved on the fastener, and opposite ends of the elastic member abut against the board body and the outer wall of the outer cavity respectively.

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