Radio frequency matcher

Abstract

The utility model discloses a radio frequency matcher, which relates to the technical field of electrical elements and comprises a shell, a first capacitor, a first adjustable inductor, a second capacitor and a second adjustable inductor. The first capacitor, the first adjustable inductor and the second capacitor are sequentially connected in series and are all arranged in the shell; the second adjustable inductor is installed in the shell, one end of the second adjustable inductor is connected with the second capacitor in series, the other end of the second adjustable inductor is connected with the radio frequency output end of the shell, and the first capacitor, the first adjustable inductor and the second capacitor which are sequentially connected in series and the second adjustable inductor connected with the second capacitor in series form a complex and fine impedance matching network. The radio frequency signal can be adjusted more accurately so as to adapt to different radio frequency system requirements.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical element technical field, concretely relates to a radio frequency matching device. BACKGROUND

[0002] In a radio frequency system, impedance mismatching between a signal source and a load can cause signal reflection and reduce transmission efficiency. By adjusting inductance, the matching device can adjust impedance to ensure efficient signal transmission. Different applications require radio frequency signals of different frequencies, and adjusting inductance can change the resonant frequency of the circuit to adapt to specific frequency requirements.

[0003] In related technologies, the inductance is generally adjusted by the variable inductance between the two variable capacitors in the radio frequency matching device. The single variable inductance results in a small inductance range of the radio frequency matching device, and the adjustment of the inductance and the capacitor with a small adjustment range is discrete, making it difficult to achieve continuous and fine impedance matching. SUMMARY

[0004] Therefore, the utility model provides a radio frequency matching device to solve the problem of small inductance range of the existing radio frequency matching device.

[0005] The utility model provides a radio frequency matching device, including first adjustable inductance, has the tap, and the tap is connected with radio frequency input end electricity, first capacitor is connected with first adjustable inductance's first end electricity, and the other end of first capacitor is grounded, second capacitor is connected with first adjustable inductance's second end electricity, and the other end of second capacitor is connected with second adjustable inductance in series, and the other end of second adjustable inductance is connected with radio frequency output end electricity.

[0006] Benefits: By using first adjustable inductance and second adjustable inductance, the impedance matching of the circuit can be flexibly adjusted to maximize the transmission efficiency of the radio frequency signal at different frequencies. This adjustability allows the matching device to adapt to different operating frequencies and load conditions, improving the overall performance of the system. Since the matching device can accurately adjust impedance, it reduces signal reflection during transmission, thereby reducing signal loss and interference, and improves signal transmission quality and stability. At the same time, the first capacitor, the first adjustable inductance, the second capacitor and the second adjustable inductance are integrated inside the shell, making the entire radio frequency matching device compact in structure, easy to install and maintain.

[0007] Optionally, the second adjustable inductance is a spiral inductance, and the outer wall of the second adjustable inductance is provided with a connecting hole for connecting a shorting piece. The connecting hole has at least two spaced apart on at least one hoop of the second adjustable inductance.

[0008] Beneficial effects: The connecting holes are arranged on at least one hoop of the spiral inductor, and at least two connecting holes are arranged at intervals, so that the shorting piece can select different connection points, thereby flexibly adjusting the inductance value, providing more precise inductance adjustment to meet the impedance matching requirements at different frequencies. By connecting different connecting holes through the shorting piece, the effective number of turns of the inductor can be quickly changed, thereby quickly adjusting the matching state of the circuit, reducing the debugging time. The spiral inductor itself has a high inductance density, and can realize a large inductance value in a small space, which is suitable for integration in a compact RF matching device shell. The connecting holes are directly arranged on the outer wall of the inductor, without the need for additional connecting structures, thereby further saving space and simplifying the overall design. Through the fixed connection of the shorting piece and the connecting hole, the stability of the inductor after adjustment is ensured, and the problem of poor contact caused by vibration or temperature change is avoided. The connection mode of the shorting piece is simple and intuitive, and it is convenient to quickly replace or adjust during debugging or maintenance.

[0009] Optionally, the outer wall of the second adjustable inductor has a flat surface for arranging the connecting holes.

[0010] Beneficial effects: The outer wall of the second adjustable inductor is provided with a flat surface, and the connecting holes are arranged on the same plane, so that the shorting piece can be more stably connected, reducing the possibility of poor contact or looseness, thereby improving the stability and reliability of the connection.

[0011] Optionally, an insulating support is arranged in the shell, and the second adjustable inductor is sleeved and connected to the insulating support.

[0012] Beneficial effects: The insulating support can effectively isolate the second adjustable inductor from the shell or other metal components, avoiding electrical short circuit caused by contact and ensuring the safe operation of the RF matching device.

[0013] Optionally, the RF matching device shell, the first adjustable inductor, the first capacitor, the second capacitor and the second adjustable inductor are arranged in the shell.

[0014] Beneficial effects: The shell not only protects the internal components, but also serves as a heat dissipation structure to help dissipate the heat generated during circuit operation, ensuring stable performance of the RF matching device during long-term operation. The first capacitor, the first adjustable inductor and the second capacitor connected in series, and the second adjustable inductor connected in series with the second capacitor form a complex and precise impedance matching network, which can more accurately adjust the RF signal to meet the requirements of different RF systems.

[0015] Optionally, the part of the insulating support for connecting the second adjustable inductor is arranged in the shell in a suspended manner.

[0016] Beneficial effects: The suspension arrangement keeps a certain distance between the second adjustable inductor and the shell, reduces the parasitic capacitance between them, optimizes the high-frequency performance, improves the transmission efficiency of the radio frequency signal, and reduces heat conduction and improves heat dissipation efficiency.

[0017] Optionally, the cross section of the insulating support is a polygonal structure, and the inner wall of the second adjustable inductor is a polygonal structure matched with the insulating support.

[0018] Beneficial effects: The matching of the polygonal structure can effectively prevent the second adjustable inductor from rotating or displacing on the insulating support, ensure that the inductor remains stable under vibration or impact, and the matching of the polygonal structure enables the inductor to be accurately installed at the predetermined position, avoiding performance problems caused by installation deviation. The contact surface of the polygonal structure is evenly distributed, which can better disperse mechanical stress and provide a plane to keep the connecting holes in the same plane, improving the strength and durability of the overall structure.

[0019] Optionally, the second adjustable inductor is formed by spiral bending a flat base material.

[0020] Beneficial effects: The inductor formed by spiral bending a flat base material can achieve a higher inductance value in a smaller space, and the structure of the flat base material reduces the contact area between turns, thereby reducing parasitic capacitance and improving high-frequency performance.

[0021] Optionally, the first and second capacitors are arranged side by side in the shell, and the axis direction of the second adjustable inductor is perpendicular to the axis direction of the first and second capacitors.

[0022] Beneficial effects: The side-by-side arrangement of the capacitors and the perpendicularity of the axis direction of the second adjustable inductor to the axis direction of the capacitors can make full use of the internal space of the shell, making the overall structure more compact, and the perpendicularity of the axis direction of the second adjustable inductor to the axis direction of the capacitors can effectively reduce the electromagnetic coupling between the inductor and the capacitor, reducing signal interference.

[0023] Optionally, the axis of the first adjustable inductor is parallel to the axis of the second adjustable inductor.

[0024] Beneficial effects: The parallel layout allows the two inductors to be closely arranged in the shell, making full use of the internal space of the shell and making the overall structure more compact.

[0025] Optionally, the axis of the second adjustable inductor is parallel to the wall surface where the radio frequency output end of the shell is located.

[0026] Beneficial effects: The parallelism of the axis of the second adjustable inductor to the wall surface where the radio frequency output end is located can make full use of the internal space of the shell, avoid mutual interference between elements, reduce unnecessary space waste, and shorten the transmission path of the radio frequency signal, reduce signal loss, and improve transmission efficiency. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the radio frequency matching device of this utility model;

[0029] Figure 2 This is a circuit diagram for an RF matching circuit.

[0030] Figure 3 This is a schematic diagram of the inductor structure of this utility model;

[0031] Figure 4 This is a schematic diagram of one installation method for the inductor structure and shorting piece of this utility model;

[0032] Figure 5 This is a schematic diagram of another installation method for the inductor structure and shorting piece of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Housing; 2. Second capacitor; 3. Second adjustable inductor; 31. Connecting hole; 32. Shorting tab; 4. First adjustable inductor; 5. First capacitor; 6. Insulating bracket. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second" and "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.

[0039] In the radio frequency system, the impedance matching of the signal source and the load is the key to ensure the efficient transmission of the signal, if the impedance is not matched, it will cause signal reflection, reduce transmission efficiency, and even damage the equipment, in order to solve this problem, the radio frequency matching device adjusts the value of inductance and capacitance to realize impedance matching, so as to ensure the efficient transmission of the signal, in the related technology, due to the limitation of single variable inductance and discrete adjustment mechanism, the inductance adjustment range of the radio frequency matching device is small, which is difficult to meet the demand of modern radio frequency system for wide frequency band, high precision and fast response.

[0040] The utility model provides a kind of radio frequency matching device to solve the problem of small inductance range of existing radio frequency matching device.

[0041] The embodiments of the utility model are described below in conjunction with Figures 1 to 5 , description embodiment of the utility model.

[0042] According to the embodiment of the utility model, a kind of radio frequency matching device is provided, including: first adjustable inductance 4, first capacitance 5 and second capacitance 2, with tap, tap is electrically connected with radio frequency input end;First capacitance 5 is electrically connected with the first end of first adjustable inductance 4, and the other end of first capacitance 5 is grounded;Second capacitance 2 is electrically connected with the second end of first adjustable inductance 4, and the other end of second capacitance 2 is connected with second adjustable inductance 3 in series, and the other end of second adjustable inductance 3 is electrically connected with radio frequency output end.

[0043] By using the first adjustable inductor 4 and the second adjustable inductor 3, the impedance matching of the circuit can be flexibly adjusted to ensure the maximum transmission efficiency of the radio frequency signal at different frequencies. This adjustability enables the matching device to adapt to different operating frequencies and load conditions, improving the overall performance of the system. Since the matching device can accurately adjust the impedance, it reduces the reflection of the radio frequency signal during transmission, thereby reducing signal loss and interference, and improving the transmission quality and stability of the signal. At the same time, the first capacitor 5, the first adjustable inductor 4, the second capacitor 2, and the second adjustable inductor 3 are integrated inside the shell 1, making the entire radio frequency matching device compact in structure, easy to install and maintain.

[0044] As an implementation form, the shell 1, the first adjustable inductor 4, the first capacitor 5, the second capacitor 2, and the second adjustable inductor 3 are all arranged in the shell 1, wherein the shell 1 has a radio frequency output end; the first terminal of the first capacitor 5 is electrically connected to the first adjustable inductor 4, and the second terminal of the first capacitor 5 is grounded, realizing the parallel arrangement of the first capacitor 5; the radio frequency input end is connected to a preset connection position of the first adjustable inductor 4, and the first adjustable inductor 4 is arranged away from the first capacitor 5, the first adjustable inductor 4, the second capacitor 2, and the second adjustable inductor 3 which are arranged in sequence and electrically connected in series, all arranged in the interior of the shell 1; the second adjustable inductor 3 is installed in the interior of the shell 1, one end of the second adjustable inductor 3 is connected in series with the second capacitor 2, and the other end away from the second capacitor 2 is connected to the radio frequency output end of the shell 1.

[0045] The shell 1 not only plays a protective role for the internal components, but also can serve as a heat dissipation structure to help dissipate the heat generated during the operation of the circuit, ensuring the stable performance of the radio frequency matching device during long-term operation. The first capacitor 5, the first adjustable inductor 4, and the second capacitor 2 arranged in sequence in series, as well as the second adjustable inductor 3 connected in series with the second capacitor 2, form a complex and delicate impedance matching network, which can more accurately adjust the radio frequency signal to meet different requirements of radio frequency systems.

[0046] Specifically, the second adjustable inductor 3 is formed by spiral bending a flat base material. The electric energy formed by spiral bending the flat base material can realize a higher inductance value in a smaller space. The structure of the flat base material reduces the contact area between turns, thereby reducing parasitic capacitance and improving high-frequency performance.

[0047] As an implementation form, the first capacitor 5 and the second capacitor 2 are designed as adjustable capacitors, which work cooperatively with the first adjustable inductor 4 and the second adjustable inductor 3. The adjustable capacitors use mechanical or electronic adjustment methods, and the adjustable capacitors and the adjustable inductors cooperate to realize continuous and fine impedance matching.

[0048] Further, the first capacitor 5, the first adjustable inductor 4, the second capacitor 2, and the second adjustable inductor 3 are designed as independent modules, each of which can be individually detached and replaced, and the modules are connected through standardized interfaces, facilitating maintenance and reducing use cost. According to different application requirements, the modules can be flexibly combined to improve adaptability.

[0049] In some embodiments, in combination with Figure 3 and Figure 4 As shown in FIG. 3, the second adjustable inductor 3 is a spiral inductor, and the outer wall of the second adjustable inductor 3 is provided with a connecting hole 31 for connecting a shorting piece 32. The connecting hole 31 is provided with at least two connecting holes 31 arranged at intervals on at least one hoop of the second adjustable inductor 3.

[0050] Specifically, the connecting hole 31 is arranged on each hoop of the second adjustable inductor 3, and the number of the connecting hole 31 is two. The connecting hole 31 is regularly arranged on the outer wall of the second adjustable inductor 3. One end of the shorting piece 32 is fixed to the connecting hole 31 of one hoop, and the other end of the shorting piece 32 is fixed to the non-corresponding connecting hole 31 of the adjacent hoop.

[0051] In some embodiments, in combination with Figure 5 As shown in FIG. 3, the connecting hole 31 is arranged on each hoop of the second adjustable inductor 3, and the number of the connecting hole 31 is two. The connecting hole 31 is regularly arranged on the outer wall of the second adjustable inductor 3. One end of the shorting piece 32 is fixed to the connecting hole 31 of one hoop, and the other end of the shorting piece 32 is fixed to the non-corresponding connecting hole 31 of the adjacent hoop.

[0052] The connecting hole 31 is provided with at least two connecting holes 31 arranged at intervals on at least one hoop of the spiral inductor, so that the shorting piece 32 can select different connection points, thereby flexibly adjusting the inductance value, providing more precise inductance adjustment, meeting the impedance matching requirements under different frequencies, and quickly changing the effective number of turns of the inductor by connecting different connecting holes 31 through the shorting piece 32, thereby quickly adjusting the matching state of the circuit, reducing the debugging time, the spiral inductor itself has a high inductance density, and a large inductance value can be realized in a small space, which is suitable for being integrated in a compact radio frequency matching device shell 1. The connecting hole 31 is directly arranged on the outer wall of the inductor, without the need for additional connecting structure, thereby further saving space and simplifying the overall design. Through the fixed connection of the shorting piece 32 and the connecting hole 31, the stability of the inductance adjustment is ensured, and the problem of poor contact caused by vibration or temperature change is avoided. The connection mode of the shorting piece 32 is simple and intuitive, and the shorting piece 32 can be quickly replaced or adjusted during debugging or maintenance.

[0053] Further, the outer wall of the second adjustable inductor 3 has a plane for arranging the connecting hole 31. The outer wall of the second adjustable inductor 3 is provided with a plane, and the plane is provided with the connecting hole 31. The connecting hole 31 can be kept on the same plane, so that the shorting piece 32 can be more stably connected, reducing the possibility of poor contact or looseness, thereby improving the stability and reliability of the connection.

[0054] In some embodiments, in combination Figure 1 As shown, the housing 1 is provided with an insulating support 6, and the second adjustable inductor 3 is sleeved and connected to the insulating support 6. The insulating support 6 can effectively isolate the second adjustable inductor 3 from the housing 1 or other metal components, avoid electrical short circuit caused by contact, and ensure the safe operation of the RF matching device. Specifically, the material of the insulating support 6 can be polyethylene material, which has excellent insulation performance and certain thermal conductivity.

[0055] Further, the part of the insulating support 6 for connecting the second adjustable inductor 3 is suspended in the housing 1. The suspension arrangement keeps a certain distance between the second adjustable inductor 3 and the housing 1, reduces the parasitic capacitance between them, optimizes the high-frequency performance, improves the transmission efficiency of the RF signal, reduces heat conduction, and improves heat dissipation efficiency.

[0056] Further, the cross section of the insulating support 6 is a polygonal structure, and the inner wall of the second adjustable inductor 3 is a polygonal structure matched with the insulating support 6. The matching of the polygonal structure can effectively prevent the second adjustable inductor 3 from rotating or displacing on the insulating support 6, ensure the stability of the inductor under vibration or impact, and make the inductor accurately installed at the predetermined position. The matching of the polygonal structure can avoid performance problems caused by installation deviation, the contact surface of the polygonal structure is uniformly distributed, can better disperse mechanical stress, and provides a plane to keep the connecting hole 31 in the same plane, improve the strength and durability of the overall structure.

[0057] In some embodiments, in combination Figure 1 As shown, the first capacitor 5 and the second capacitor 2 are arranged side by side in the housing 1, and the axis direction of the second adjustable inductor 3 is perpendicular to the axis direction of the first capacitor 5 and the second capacitor 2. The side-by-side arrangement of the capacitors and the perpendicularity of the axis direction of the inductor can make full use of the internal space of the housing 1, make the overall structure more compact, and effectively reduce the electromagnetic coupling between the inductor and the capacitor, and reduce signal interference.

[0058] Further, the axis of the first adjustable inductor 4 is parallel to the axis of the second adjustable inductor 3. The parallel layout allows the two inductors to be closely arranged in the housing 1, making full use of the internal space of the housing 1 and making the overall structure more compact.

[0059] Further, the axis of the second adjustable inductor 3 is parallel to the wall surface where the radio frequency output end of the shell 1 is located, the axis of the second adjustable inductor 3 is parallel to the wall surface where the radio frequency output end is located, which can fully utilize the internal space of the shell 1, avoid mutual interference between elements, reduce unnecessary space waste, the axis of the second adjustable inductor 3 is parallel to the wall surface where the radio frequency output end is located, which shortens the transmission path of the radio frequency signal, reduces signal loss, and improves transmission efficiency.

[0060] As an implementation form, the first capacitor 5, the first adjustable inductor 4, the second capacitor 2 and the second adjustable inductor 3 are vertically stacked and arranged in the shell 1, which reduces the occupied area. The vertical stacking layout fully utilizes the space of the shell 1, is suitable for miniaturized equipment, reduces the signal path length, optimizes the signal transmission path, and reduces the signal loss.

[0061] Obviously, the above embodiments are only examples for the purpose of clarity, and are not limitations on the embodiments. Although the embodiments of the present application are described in conjunction with the drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations all fall within the scope defined by the present application.

Claims

1. A radio frequency matcher, characterized by, It comprises: a first adjustable inductor (4) having a tap electrically connected to a radio frequency input end; a first capacitor (5) electrically connected to a first end of the first adjustable inductor (4), the other end of the first capacitor (5) being grounded; a second capacitor (2) electrically connected to a second end of the first adjustable inductor (4), the other end of the second capacitor (2) being in series with a second adjustable inductor (3), the other end of the second adjustable inductor (3) being electrically connected to a radio frequency output end.

2. The radio frequency matcher of claim 1, wherein, A plurality of connection holes (31) for connecting short pieces (32) are arranged on the outer wall of the second adjustable inductor (3), and the connection holes (31) are arranged at intervals on at least one hoop of the second adjustable inductor (3).

3. The radio frequency matcher of claim 2, wherein, The outer wall of the second adjustable inductor (3) has a flat surface for arranging the connection holes (31).

4. The radio frequency matcher of claim 2, wherein, A plurality of short pieces (32) are arranged in parallel at intervals on the outer wall of the second adjustable inductor (3).

5. The radio frequency matcher of claim 1, wherein, It further comprises: a housing (1), wherein the first adjustable inductor (4), the first capacitor (5), the second capacitor (2) and the second adjustable inductor (3) are arranged in the housing (1).

6. The radio frequency matcher of claim 5, wherein, The second adjustable inductor (3) is arranged in suspension in the housing (1).

7. The radio frequency matcher of claim 6, wherein, An insulating support (6) is arranged in the housing (1), and the second adjustable inductor (3) is sleeved and connected to the insulating support (6), and the insulating support (6) is used to connect the part of the second adjustable inductor (3) arranged in suspension in the housing (1).

8. The radio frequency matcher of claim 7, wherein, The cross section of the insulating support (6) is a polygonal structure, and the inner wall of the second adjustable inductor (3) is a polygonal structure matched with the insulating support (6).

9. The radio frequency matcher of any one of claims 1-8, wherein, The second adjustable inductor (3) is formed by spiral bending of a flat base material.

10. The radio frequency matcher of any one of claims 5-7, wherein, The first capacitor (5) and the second capacitor (2) are arranged side by side in the housing (1), and the axis direction of the second adjustable inductor (3) is perpendicular to the axis direction of the first capacitor (5) and the second capacitor (2).

11. The radio frequency matcher of claim 10, wherein, The axis of the first adjustable inductor (4) is parallel to the axis of the second adjustable inductor (3), and the axis of the second adjustable inductor (3) is parallel to the wall surface where the radio frequency output end of the housing (1) is located.

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