Short wave impedance matcher

Abstract

The utility model provides a kind of short wave impedance matcher, it includes: metal connecting band, inductance adjusting structure, first external port and second external port;Metal connecting band is electrically connected with first external port and second external port;Inductance adjusting structure includes: insulating stick, spiral conductive band, conductive connecting piece and support frame;Insulating stick is fixedly connected with support frame, spiral conductive band is spirally wound in the circumferential side of insulating stick and is formed with multiple first connecting parts, one end of spiral conductive band is electrically connected with first external port, one end of metal connecting band is electrically connected with one end of conductive connecting piece, the other end of metal connecting band is electrically connected with second external port;The other end of conductive connecting piece is connected by with any one first connecting part, to realize with spiral conductive band detachable connection and electrical connection.The utility model can flexibly adjust the frequency of short wave impedance matcher output signal.

Description

Technical Field

[0001] This utility model relates to the field of microelectronics technology, and in particular to a shortwave impedance matching device. Background Technology

[0002] Traditionally, shortwave impedance matching devices are supplied by the transmitting antenna manufacturer, ensuring perfect compatibility between the equipment and the antenna. However, this also introduces certain limitations. Due to differences in technical standards between different manufacturers, impedance matching devices from other manufacturers are often incompatible with specific shortwave communication and transmitting equipment.

[0003] Therefore, improving the frequency flexibility of shortwave impedance matching devices has become an urgent problem to be solved. Utility Model Content

[0004] To solve the above problems, the shortwave impedance matching device provided by this utility model can flexibly change the inductance of the impedance matching circuit by setting an adjustable first inductance adjustment structure between the first external port and the second external port, thereby flexibly adjusting the frequency of the output radio frequency signal of the shortwave impedance matching device.

[0005] This utility model provides a shortwave impedance matching device, which includes: a metal connecting strip, a first inductance adjustment structure, a first external port and a second external port. The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through a first inductor adjustment structure and a metal connecting strip. The metal connecting strip electrically connects the first external port and the second external port through the first inductor adjustment structure; The first inductance adjustment structure includes: an insulating rod, a spiral conductive strip, a conductive connector, and a support frame; The insulating rod is fixedly connected to the support frame. The spiral conductive strip is spirally wound around the periphery of the insulating rod and forms multiple first connecting parts along the length of the insulating rod. One end of the spiral conductive strip is electrically connected to the first external port, one end of the metal connecting strip is electrically connected to one end of the conductive connector, and the other end of the metal connecting strip is electrically connected to the second external port. The other end of the conductive connector is connected to either of the first connecting parts to achieve a detachable connection and electrical connection with the spiral conductive strip.

[0006] Optionally, one end of the metal connecting strip is provided with a plurality of second connecting portions along the extending direction of the metal connecting strip; One end of the conductive connector is connected to any of the second connecting parts to achieve a detachable connection and electrical connection with the metal connecting strip.

[0007] Optionally, a plurality of second connecting portions are also provided at the other end of the metal connecting strip along the extension direction of the metal connecting strip; The shortwave impedance matching device also includes a second inductor adjustment structure with the same internal structure as the first inductor adjustment structure. The second external port is electrically connected to the other end of the metal connecting strip through the spiral conductive strip and conductive connector in the second inductor adjustment structure. The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through a first inductor adjustment structure, a metal connecting strip, and a second inductor adjustment structure.

[0008] Optionally, both the first connecting part and the second connecting part are hole structures; Both ends of the conductive connector are provided with connecting holes. The conductive connector is connected to the corresponding first connecting part and second connecting part respectively by screws and connecting holes, so as to realize the electrical connection between the metal connecting strip and the corresponding spiral conductive strip through the corresponding conductive connector.

[0009] Alternatively, the insulating rod may be made of polytetrafluoroethylene (PTFE).

[0010] Optionally, the surfaces of the spiral conductive strip and the metal connecting strip are plated with silver.

[0011] Optionally, the metal connecting strip, the spiral conductive strip, and the conductive connector are all made of copper.

[0012] Optionally, the shortwave impedance matching device also includes: a capacitor adjustment structure and a fixed body; The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through a first inductor adjustment structure, a capacitor adjustment structure and a metal connecting strip. Both the support frame and the capacitor adjustment structure are fixedly mounted on the fixed body, and the capacitor adjustment structure is electrically connected to the metal connection. The capacitor adjustment structure is used to adjust the impedance of the impedance matching circuit by adjusting the capacitive reactance of the impedance matching circuit. The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through a first inductor adjustment structure, a capacitor adjustment structure and a metal connecting strip.

[0013] Optionally, the capacitor adjustment structure includes: a tightening head, a fastening assembly, a conductive shaft, multiple stators arranged at intervals, and multiple rotors arranged at intervals; Multiple stators and at least one rotor are arranged alternately along the length of a conductive shaft, which passes through multiple stators and at least one rotor. Multiple stators are fixedly connected to a fixed body, and the conductive shaft is rotatably connected to the fixed body. The main body of multiple stators is located on one side of the conductive shaft. At least one rotor has a fan-shaped structure. The conductive shaft is fixedly connected to at least one rotor, and one end of the conductive shaft is rotatably connected to and electrically connected to a metal connecting strip. The fastening assembly is connected to the conductive shaft and is used to lock the conductive shaft to the fixed body; the conductive shaft drives the rotor to rotate relative to the stator to adjust the area of ​​the rotor overlapping the stator in the longitudinal direction of the conductive shaft.

[0014] Optionally, the multiple stators and at least one rotor are perpendicular to the conductive shaft. The multiple stators include two outer stators, and at least one rotor is located between the two outer stators. The two outer stators extend into mounting portions toward the conductive shaft. Mounting holes are provided on the mounting portions, and the mounting holes are larger than the cross-section of the conductive shaft. There are two fastening components, which are located on opposite outer sides of the two outer stators. The fastening assembly includes a support plate and fastening nuts. The support plate has a rotating hole with a diameter smaller than that of the mounting hole. The conductive shaft passes through the rotating hole and is rotatably connected to the support plate. The support plate is detachably connected to the corresponding outer stator. Two fastening nuts are located on opposite outer sides of the two outer stators and are threadedly connected to the conductive shaft. The fastening nuts are used to fix the conductive shaft to the outer stator by pressing against the corresponding support plate.

[0015] Optionally, the shortwave impedance matching device also includes: an insulating support; The insulating bracket is fixedly connected to the fixing body and connected to the metal connecting strip to separate the metal connecting strip from the fixing body.

[0016] The shortwave impedance matching device provided in this embodiment features an adjustable inductance adjustment structure between a first external port and a second external port. An insulating rod in the inductance adjustment structure is fixedly connected to a support frame. A spiral conductive strip is spirally wound around the periphery of the insulating rod and forms multiple first connecting parts along the length of the insulating rod. One end of the spiral conductive strip is electrically connected to the first external port, and one end of the metal connecting strip is electrically connected to one end of the conductive connector. The other end of the conductive connector is connected to any of the first connecting parts to achieve a detachable and electrical connection with the spiral conductive strip. Thus, when the frequency of the shortwave impedance matching device's output signal needs to be adjusted, the inductance of the impedance matching circuit can be adjusted by replacing the first connecting parts at other positions on the other end of the conductive connector, thereby adjusting the frequency of the shortwave impedance matching device's output signal. This simple operation improves the flexibility of adjusting the frequency of the shortwave impedance matching device's output RF signal, thereby expanding the application scenarios of the shortwave impedance matching device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic structural diagram of a shortwave impedance matching device according to an embodiment of this application; Figure 2 This is a schematic top view of a shortwave impedance matching device according to an embodiment of this application; Figure 3 This is a schematic structural diagram of a shortwave impedance matching device according to an embodiment of this application; Figure 4 This is a schematic structural diagram of a shortwave impedance matching device according to an embodiment of this application after removing the locking component on one side.

[0019] Figure label: 1. Metal connecting strip; 11. Second connecting part; 2. Inductance adjustment structure / second inductance adjustment structure / first inductance adjustment structure; 21. Insulating rod; 22. Spiral conductive strip; 221. First connecting part; 23. Conductive connector; 24. Support frame; 31. First external port; 32. Second external port; 4. Capacitor adjustment structure; 41. Baffle; 42. Fastening assembly; 421. Support plate; 4211. Rotating hole; 422. Fastening nut; 43. Conductive shaft; 44. Stator; 441. Outer stator; 4411. Mounting part; 4412. Mounting hole; 442. Inner stator; 45. Rotor; 51. Fixing body; 52. Insulating bracket. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] Spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., are used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, an element or feature described as “below,” “below,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0023] It should be noted that when an element is referred to as "fixedly connected" to another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is referred to as being "directly on" another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0025] One embodiment of this utility model provides a shortwave impedance matching device, combined with... Figure 1 and Figure 2 The shortwave impedance matching device includes: a metal connecting strip 1, a first inductance adjustment structure 2, a first external port 31, and a second external port 32.

[0026] The shortwave impedance matching device is used to form an impedance matching circuit between the first external port 31 and the second external port 32 through the first inductor adjustment structure 2 and the metal connecting strip 1. The metal connecting strip 1 electrically connects the first external port 31 and the second external port 32 through the first inductor adjustment structure 2 (the connection relationship between the metal connecting strip 1 and the first external port 31 through the first inductor adjustment structure 2 is not shown in the figure).

[0027] The first inductance adjustment structure 2 includes: an insulating rod 21, a spiral conductive strip 22, a conductive connector 23, and a support frame 24.

[0028] An insulating rod 21 is fixedly connected to a support frame 24. A spiral conductive strip 22 is spirally wound around the periphery of the insulating rod 21 and forms multiple first connecting portions 221 along the length of the insulating rod 21. One end of the spiral conductive strip 22 is electrically connected to a first external port 31, one end of a metal connecting strip 1 is electrically connected to one end of a conductive connector 23, and the other end of the metal connecting strip 1 is electrically connected to a second external port 32. The other end of the conductive connector 23 is connected to any of the first connecting portions 221 to achieve a detachable connection and electrical connection with the spiral conductive strip 22.

[0029] It is understandable that each turn of the spiral conductive tape 22 around the insulating post will form a first connecting part 221. That is, the number of first connecting parts 221 is the same as the number of turns of the spiral conductive tape 22 around the insulating post, but it is not limited to this.

[0030] In this embodiment, the first external port 31 is a shortwave radio frequency signal input port, and the second external port 32 is a shortwave radio frequency signal output port; there are six first connecting parts 221; the cross-sections of the spiral conductive strip 22 and the metal connecting strip 1 are both rectangular; the materials of the conductive connector 23, the metal connecting strip 1, and the spiral conductive strip 22 are all copper, but not limited to this; each first connecting part 221 is provided with a threaded hole, and the other end of the conductive connector 23 is provided with a connecting hole. The conductive connector 23 is detachably connected to the corresponding first connecting part 221 by passing through the connecting hole and the corresponding threaded hole with a screw (not shown in the figure). Meanwhile, the shortwave in this embodiment refers to radio waves with a frequency range of 3MHz to 30MHz, commonly used in fields such as long-distance communication, broadcasting, and radar detection.

[0031] The shortwave impedance matching device provided in this embodiment uses an adjustable first inductance adjustment structure 2 between the first external port 31 and the second external port 32. When it is necessary to adjust the frequency of the output signal of the shortwave impedance matching device, the inductance of the impedance matching circuit can be adjusted by replacing the first connection part 221 at other positions on the other end of the conductive connector 23, thereby adjusting the frequency of the output signal of the shortwave impedance matching device. The operation is simple, improving the flexibility of frequency adjustment of the output RF signal of the shortwave impedance matching device, thus expanding the application scenarios of the shortwave impedance matching device.

[0032] In a further optional embodiment of this invention, a plurality of second connecting portions 11 are provided at one end of the metal connecting strip 1 along its extending direction. One end of the conductive connector 23 is connected to any one of the second connecting portions 11 to achieve a detachable connection and electrical connection with the metal connecting strip 1.

[0033] Understandably, each second connecting part 11 has a threaded hole, and one end of the conductive connector 23 has a connecting hole. The conductive connector 23 is detachably connected to the metal connecting strip 1 by passing a screw (not shown in the figure) through the connecting hole and the corresponding threaded hole. By providing multiple second connecting parts 11 at one end of the metal connecting strip 1, the conductive connector 23 can be selectively connected to more first connecting parts 221 without moving the metal connecting strip 1, and the stability of the electrical connection between the metal connecting strip 1 and the spiral conductive strip 22 is ensured.

[0034] In a further optional embodiment of this embodiment, a plurality of second connecting portions 11 are also provided at the other end of the metal connecting strip 1 along the extending direction of the metal connecting strip 1.

[0035] The shortwave impedance matching device includes two inductor adjustment structures 2, namely a first inductor adjustment structure 2 and a second inductor adjustment structure 2. The internal structure of the first inductor adjustment structure is the same as that of the second inductor adjustment structure, except that their specific positions and connections with other components differ. In this embodiment, the first inductor adjustment structure 2 and the second inductor adjustment structure 2 are collectively referred to as inductor adjustment structure 2. The second external port 32 is electrically connected to the other end of the metal connecting strip 1 through the spiral conductive strip 22 and the conductive connector 23 in the second inductor adjustment structure 2. Thus, the metal connecting strip 1 is electrically connected to the first external port 31 and the second external port 32 through the two inductor adjustment structures 2, respectively. By setting the inductor adjustment structure 2 at the other end of the metal connecting strip 1, the adjustment range of the inductor on the impedance matching circuit is further increased, thereby further expanding the application scenarios of the shortwave impedance matching device.

[0036] In a further optional embodiment of this example, the insulating rod 21 is made of polytetrafluoroethylene (PTFE). This gives the insulating rod 21 excellent electrical insulation, chemical stability, and mechanical strength, while winding the spiral conductive tape 22 around the insulating rod 21 ensures that the impedance matching circuit has good electrical performance.

[0037] In a further optional embodiment of this invention, both the surface of the spiral conductive strip 22 and the surface of the metal connecting strip 1 are plated with silver. By plating the surfaces of the spiral conductive strip 22 and the metal connecting strip 1 with silver, the conductivity and corrosion resistance of the spiral conductive strip 22 and the metal connecting strip 1 are improved, which not only extends the service life of the shortwave impedance matching device, but also improves the stability and quality of radio frequency signal transmission.

[0038] Taking the inductor adjustment structure 2 near the first external port 31 as an example, if the frequency of the RF signal output by the shortwave impedance matching device is 3MHz-6MHz, it indicates that the current RF signal performance is poor, i.e., it belongs to low frequency. In this case, the corresponding conductive connector 23 needs to be shifted to the right to increase the inductance of the impedance matching circuit. If the frequency of the RF signal output by the shortwave impedance matching device is 21MHz-30MHz, it also indicates that the current RF signal performance is poor, i.e., it belongs to high frequency. In this case, the corresponding conductive connector 23 needs to be shifted to the left to reduce the inductance of the impedance matching circuit.

[0039] In other words, if the standing wave ratio (SWR) of shortwave (3MHz-6MHz) signals, i.e., radio frequency (RF) signals, is required to be less than or equal to 1.8dB, and if the SWR of the RF signal is greater than 1.8dB, then the corresponding conductive connector 23 needs to be shifted to the right to increase the inductance of the impedance matching circuit, thereby reducing the size of the SWR.

[0040] Furthermore, the shortwave impedance matching device also includes: a capacitor adjustment structure 4 and a fixed body 51.

[0041] The shortwave impedance matching device is used to form an impedance matching circuit between the first external port 31 and the second external port 32 through the inductor adjustment structure 2, the capacitor adjustment structure 4, and the metal connecting strip 1. The support frame 24 and the capacitor adjustment structure 4 are both fixedly mounted on the fixing body 51, and the capacitor adjustment structure 4 is electrically connected to the metal connecting strip 1. The capacitor adjustment structure 4 is used to adjust the impedance of the impedance matching circuit by adjusting the capacitive reactance of the impedance matching circuit.

[0042] The fixing body 51 can be a base plate and / or a chassis, which is not limited in this embodiment; both the first external port and the second external port are fixed to the fixing body 51. When the fixing body 51 is a base plate and a chassis, the base plate is fixedly installed inside the chassis, the metal connecting strip 1, the inductor adjustment structure 2 and the capacitor adjustment structure 4 are all located inside the chassis, and both the first external port and the second external port are fixed to the chassis and exposed outside the chassis.

[0043] By setting up capacitor adjustment structure 4, the capacitance value of the impedance matching circuit can be flexibly adjusted, further improving the flexibility of frequency adjustment of the output RF signal of the shortwave impedance matching circuit.

[0044] The shortwave impedance matching device is used to form an impedance matching circuit between the first external port 31 and the second external port 32 through two inductor adjustment structures 2, a capacitor adjustment structure 4 and a metal connecting strip 1.

[0045] Specifically, in combination Figure 1 , Figure 2 and Figure 3The capacitor adjustment structure 4 includes: a tightening head, a fastening assembly 42, a conductive shaft 43, multiple stators 44 arranged at intervals, and multiple rotors 45 arranged at intervals.

[0046] Multiple stators 44 and at least one rotor 45 are arranged alternately along the length of a conductive shaft 43. The conductive shaft 43 passes through the multiple stators 44 and at least one rotor 45. The multiple stators 44 are fixedly connected to a fixed body 51, and the conductive shaft 43 is rotatably connected to the fixed body 51. The main body of the multiple stators 44 is located on one side of the conductive shaft 43. At least one rotor 45 has a fan-shaped structure. The conductive shaft 43 is fixedly connected to the corner of at least one rotor 45 away from the corresponding arc-shaped side. One end of the conductive shaft 43 is rotatably connected to and electrically connected to a metal connecting strip 1.

[0047] The fastening assembly 42 is connected to the conductive shaft 43 and is used to lock the conductive shaft 43 onto the fixed body 51; the conductive shaft 43 drives the rotor 45 to rotate relative to the stator 44 to adjust the area of ​​the rotor 45 overlapping with the stator 44 in the length direction of the conductive shaft 43.

[0048] Among them, combined Figure 1 and Figure 4 Multiple stators 44 and at least one rotor 45 are perpendicular to the conductive shaft 43. The multiple stators 44 include two outer stators 441. At least one rotor 45 is located between the two outer stators 441. The two outer stators 441 extend mounting portions 4411 toward the conductive shaft 43. Mounting holes 4412 are provided on the mounting portions 4411. The mounting holes 4412 are larger than the cross-section of the conductive shaft 43. There are two fastening components 42. The two fastening components 42 are located on opposite outer sides of the two outer stators 441.

[0049] The fastening assembly 42 includes a support plate 421 and fastening nuts 422. The support plate 421 has a rotating hole 4211, the diameter of which is smaller than the diameter of the mounting hole 4412. The conductive shaft 43 passes through the rotating hole 4211 and is rotatably connected to the support plate 421. The support plate 421 is detachably connected to the corresponding outer stator 441 by bolts. The two fastening nuts 422 are located on opposite outer sides of the two outer stators 441 and are threadedly connected to the conductive shaft 43. The fastening nuts 422 are used to fix the conductive shaft 43 to the outer stator 441 by pressing against the corresponding support plate 421.

[0050] The stator 44 and rotor 45 are both made of conductive materials; the fastening nut 422 located on the side of the support plate 421 facing the metal connecting strip 1 is located between the corresponding support plate 421 and the metal connecting strip 1; the included angle at the corner of the rotor 45 opposite to the arc-shaped side is between 160 degrees and 180 degrees, preferably 180 degrees.

[0051] It is understandable that when the multiple stators 44 include only two outer stators 441, the number of rotors 45 is only one. In this embodiment, the multiple stators 44 include two outer stators 441 and seven inner stators 442. The inner stators 442 are arranged inside the two outer stators 441 and are not neatly arranged on one side of the conductive shaft 43. The eight rotors 45 are neatly interspersed among the nine stators 44. The inner stators 442 are rectangular plates with clearance openings on the side facing the conductive shaft 43. The clearance openings are used to ensure that the inner stators 442 and the conductive shaft 43 are always separated. The width of the rectangle is greater than the radius of the rotors 45. The portions of the outer stators 441 that overlap with the inner stators 442 in the length direction of the conductive shaft 43 together with the inner stators 442 form the main body of the multiple stators 44. The portions of the outer stators 441 that do not overlap with the inner stators 442 in the length direction of the conductive shaft 43 include mounting portions 4411.

[0052] When it is necessary to adjust the area of ​​overlap between the rotor 45 and the stator 44 along the length of the conductive shaft 43, first loosen the fastening nuts 422 on both sides to separate the fastening nuts 422 from the corresponding support plates 421. Then rotate the conductive shaft 43 to adjust the area of ​​overlap between the rotor 45 and the stator 44 along the length of the conductive shaft 43. After adjustment, tighten the fastening nuts 422 on both sides to make the fastening nuts 422 abut against the corresponding support plates 421 to fix the rotor 45 on the fixed body 51.

[0053] The larger the overlap area between rotor 45 and stator 44, the larger the capacitance of the shortwave impedance matching circuit. For low-frequency radio frequency signals, reducing the overlap area between rotor 45 and stator 44 reduces the capacitance of the impedance matching circuit, thereby better ensuring that the standing wave ratio (SWR) of the radio frequency signal meets the requirements. Specifically, it is necessary to adjust rotor 45 to a suitable position according to the existing antenna to ensure that the capacitance meets the overall SWR requirements of the antenna. This embodiment will not elaborate on this aspect. In a further optional embodiment of this example, the capacitor adjustment structure 4 also includes a baffle 41. The baffle 41 is fixedly disposed on the outside of the plurality of stators 44. By providing the baffle 41, other conductive devices can be effectively prevented from falling between the plurality of stators 44 and affecting the working performance of the shortwave impedance matching device.

[0054] In a further optional embodiment of this invention, the shortwave impedance matching device further includes an insulating bracket 52. The insulating bracket 52 is fixedly connected to the fixing body 51 and connected to the metal connecting strip 1 to separate the metal connecting strip 1 from the fixing body 51. By providing the insulating bracket 52, the metal connecting strip 1 can be supported, preventing it from bending or deforming, or from contacting the fixing body 51, thus affecting the working performance of the shortwave impedance matching device.

[0055] The shortwave impedance matching circuit provided in this embodiment has a simple structure, is easy to operate, and is more adaptable. It can be adapted to transmitting antennas from different manufacturers and in different frequency ranges, and can better match broadband shortwave transmitters. The inductor adjustment structure 2 and the capacitor adjustment structure 4 can form an LC network, realizing a combination of a high-power adjustable capacitor and a high-power adjustable inductor. This solves the problem of adjustability under high power conditions (above 5kW), covering the matching requirements of most high-power shortwave antennas. By adjusting the capacitance value of the impedance matching circuit, the resonant frequency of the impedance matching circuit is changed, thereby matching the load impedance with the source impedance.

[0056] Among them, the capacitor adjustment structure 4 is a high-power adjustable capacitor. The capacity is adjusted by adjusting the area of ​​the rotor 45 overlapping with the stator 44 in the length direction of the conductive shaft 43. The capacitor adjustment structure 4 uses air as a medium, which makes the capacitor adjustment structure 4 have the characteristics of low loss, high power and high stability at high and low temperatures. The inductor adjustment structure 2, as a high-power adjustable inductor, changes the inductance by adjusting the position of the connection between the spiral conductive strip 22 and the conductive connector 23 in the radio frequency path. It also uses air as the medium, which makes the inductor adjustment structure 2 have low loss, high power and strong high and low temperature stability.

[0057] In the description of this specification, the references to terms such as "some embodiments," "other embodiments," "ideal embodiments," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A shortwave impedance matching device, characterized in that, The shortwave impedance matching device includes: a metal connecting strip, a first inductor adjustment structure, a first external port, and a second external port; The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through the first inductor adjustment structure and the metal connecting strip; The metal connecting strip electrically connects the first external port and the second external port through the first inductor adjustment structure; The first inductance adjustment structure includes: an insulating rod, a spiral conductive strip, a conductive connector, and a support frame; The insulating rod is fixedly connected to the support frame. The spiral conductive strip is spirally wound around the periphery of the insulating rod and forms a plurality of first connecting parts along the length of the insulating rod. One end of the spiral conductive strip is electrically connected to the first external port, one end of the metal connecting strip is electrically connected to one end of the conductive connector, and the other end of the metal connecting strip is electrically connected to the second external port. The other end of the conductive connector is connected to any of the first connecting parts to achieve a detachable connection and electrical connection with the spiral conductive strip.

2. The shortwave impedance matching device according to claim 1, characterized in that, One end of the metal connecting strip is provided with a plurality of second connecting portions along the extending direction of the metal connecting strip; One end of the conductive connector is connected to any of the second connecting parts to achieve a detachable connection and electrical connection with the metal connecting strip.

3. The shortwave impedance matching device according to claim 2, characterized in that, The other end of the metal connecting strip is also provided with a plurality of second connecting portions along the extension direction of the metal connecting strip; The shortwave impedance matching device also includes a second inductor adjustment structure with the same internal structure as the first inductor adjustment structure. The second external port is electrically connected to the other end of the metal connecting strip through the spiral conductive strip and conductive connector in the second inductor adjustment structure. The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through the first inductor adjustment structure, the metal connecting strip, and the second inductor adjustment structure.

4. The shortwave impedance matching device according to claim 3, characterized in that, Both the first connecting portion and the second connecting portion have hole structures; Both ends of the conductive connector are provided with connecting holes. The conductive connector is connected to the corresponding first connecting part and second connecting part respectively by screws and connecting holes, so as to realize the electrical connection between the metal connecting strip and the corresponding spiral conductive strip through the corresponding conductive connector.

5. The shortwave impedance matching device according to claim 1, characterized in that, The insulating rod is made of polytetrafluoroethylene.

6. The shortwave impedance matching device according to claim 1, characterized in that, The surfaces of the spiral conductive strip and the metal connecting strip are both plated with silver. The metal connecting strip, the spiral conductive strip, and the conductive connector are all made of copper.

7. The shortwave impedance matching device according to claim 1, characterized in that, The shortwave impedance matching device also includes: a capacitor adjustment structure and a fixing body; The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through the first inductor adjustment structure, the capacitor adjustment structure and the metal connecting strip; Both the support frame and the capacitor adjustment structure are fixedly mounted on the fixed body, and the capacitor adjustment structure is electrically connected to the metal connection. The capacitor adjustment structure is used to adjust the impedance of the impedance matching circuit by adjusting the capacitive reactance of the impedance matching circuit. The shortwave impedance matching device is used to form an impedance matching circuit between the first external port and the second external port through the first inductor adjustment structure, the capacitor adjustment structure and the metal connecting strip.

8. The shortwave impedance matching device according to claim 7, characterized in that, The capacitor adjustment structure includes: a tightening head, a fastening assembly, a conductive shaft, multiple stators arranged at intervals, and multiple rotors arranged at intervals. Multiple stators and at least one rotor are arranged alternately along the length of the conductive shaft, which passes through the multiple stators and the at least one rotor. The multiple stators are fixedly connected to the fixed body, and the conductive shaft is rotatably connected to the fixed body. The main body of the multiple stators is located on one side of the conductive shaft. The at least one rotor has a fan-shaped structure. The conductive shaft is fixedly connected to the at least one rotor, and one end of the conductive shaft is rotatably connected to and electrically connected to the metal connecting strip. The fastening assembly is connected to the conductive shaft and is used to lock the conductive shaft onto the fixed body; the conductive shaft drives the rotor to rotate relative to the stator to adjust the area of ​​the rotor overlapping the stator in the length direction of the conductive shaft.

9. The shortwave impedance matching device according to claim 8, characterized in that, The plurality of stators and the at least one rotor are all perpendicular to the conductive shaft. The plurality of stators include two outer stators. The at least one rotor is located between the two outer stators. The two outer stators extend into mounting portions toward the conductive shaft. The mounting portions are provided with mounting holes, which are larger than the cross-section of the conductive shaft. The number of fastening components is two, and the two fastening components are respectively located on the opposite outer sides of the two outer stators; The fastening assembly includes a support plate and fastening nuts. The support plate has a rotating hole with a diameter smaller than that of the mounting hole. The conductive shaft passes through the rotating hole, passes through the support plate, and is rotatably connected to the support plate. The support plate is detachably connected to the corresponding outer stator. Two fastening nuts are located on opposite outer sides of the two outer stators and are threadedly connected to the conductive shaft. The fastening nuts are used to fix the conductive shaft to the outer stator by pressing against the corresponding support plate.

10. The shortwave impedance matching device according to claim 7, characterized in that, The shortwave impedance matching device further includes: an insulating support; The insulating bracket is fixedly connected to the fixing body and connected to the metal connecting strip to separate the metal connecting strip from the fixing body.

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