Spiral resonator convenient for coupling adjustment and adjustment method

Abstract

The invention provides a spiral resonator convenient for coupling adjustment. The spiral resonator comprises a resonator main body, a fixed adapter and a signal coupling module, a main coil is arranged in the resonator main body; a position adjusting structure, a tuning circuit board and a coupling coil are arranged on the signal coupling module; the signal coupling module is connected to the resonator main body through the fixed adapter; the position of the signal coupling module relative to the resonator main body can be adjusted by adjusting the cooperation of a position adjusting structure and a fixed adapter, and then the relative position between the coupling coil and the main coil is adjusted so as to change the output impedance of the spiral resonator. The tuning circuit board is provided with an adjustable capacitor or an inductor, and the adjustable capacitor or the inductor is connected with the coupling coil in series or in parallel so as to change the output impedance of the spiral resonator. The longitudinal depth of the coupling coil can be continuously adjusted, and the defect that an original resonator is single in function is overcome.

Description

Technical Field

[0001] The invention belongs to the field of quantum computing, and in particular relates to a spiral resonator and an adjustment method for facilitating the adjustment of coupling. Background Art

[0002] Quantum computing is one of the important topics of modern experiments and a frontier field with broad prospects. Common quantum computing platforms include cold atom systems, solid-state NV color centers (a luminescent point defect in diamond), superconductors, ion trap systems, etc. An ion trap is an experimental device that traps ions. As quantum bits, ions have the advantages of high detection fidelity, long coherence time, and high scalability. These advantages can only be effectively exerted when ions are stably bound in an electric potential trap. Therefore, a stable and convenient ion trap electrical system is particularly important for ion quantum computing.

[0003] Trapped ions are mainly achieved through two pairs of electrodes: DC electrodes and RF electrodes. The RF signal (i.e., radio frequency signal) is amplified by the signal source through the RF amplifier and coupled into the spiral resonator, and then applied to the RF electrode of the trap.

[0004] The spiral resonator is mainly composed of a coupling coil (antenna) and a main coil, and its main function is voltage gain. The coupling coil is used to impedance match (couple) the RF source end with the circuit composed of the main coil and the trap capacitor. In the existing spiral resonator, when performing impedance matching, impedance matching is performed by simply changing the distance between the coupling coil and the main coil. This method is time-consuming and labor-intensive. For example, it may be necessary to disassemble the spiral resonator in a contact manner to adjust the impedance between the coupling coil and the main coil. In addition, there is also the problem that the coupling coil cannot be continuously adjusted, making it difficult to perform impedance matching. Summary of the invention

[0005] In view of the above problems, the present invention proposes a helical resonator that is easy to adjust coupling, including a resonator body, a fixed adapter and a signal coupling module;

[0006] A main coil is arranged inside the resonator body;

[0007] The signal coupling module is provided with a position adjustment structure, a tuning circuit board and a coupling coil;

[0008] The signal coupling module is connected to the resonator body through the fixed adapter;

[0009] The position of the signal coupling module relative to the resonator body can be adjusted by adjusting the cooperation between the position adjustment structure and the fixed adapter, thereby adjusting the relative position between the coupling coil and the main coil to change the output impedance of the helical resonator;

[0010] The tuning circuit board is provided with an adjustable capacitor or inductor, and the adjustable capacitor or inductor is connected in series or in parallel with the coupling coil to change the output impedance of the spiral resonator.

[0011] Furthermore, a fixed adapter is coaxially plugged into the upper end of the resonator body, the fixed adapter is in a cylindrical shape, and a signal coupling module is threadedly connected in the cylindrical cavity until the signal coupling module is inserted into the resonator body. A tuning circuit board is installed in the signal coupling module, and a coupling coil is connected below the tuning circuit board. The relative position between the coupling coil and the main coil is adjusted by threaded engagement between the position adjustment structure and the fixed adapter.

[0012] Furthermore, a channel is provided on the inner wall of the signal coupling module, and the longitudinal section of the channel is an inverted L-shape; the ground wire of the coupling coil is led out from the channel and grounded, and the adjustment member is inserted into the channel from the outside and pressed against the ground wire.

[0013] Furthermore, the resonator body comprises a shell body, and the upper and lower ends of the shell body are respectively connected to an upper bottom plate and a lower bottom plate to form a closed cylinder for accommodating the main coil;

[0014] The upper base plate is vertically provided with a through hole, and the fixed adapter is coaxially inserted in the through hole. The lower base plate is provided with an adapter hole for installing a vacuum feedthrough adapter;

[0015] The upper base plate and the lower base plate are connected by fixing bolts.

[0016] Furthermore, the fixed adapter is a two-stage stepped cylinder, and the diameter of the upper cylinder is larger than the diameter of the lower cylinder. The lower cylinder is coaxially inserted into the through hole until the lower end surface of the upper cylinder fits with the upper surface of the upper base plate and is fixed by the first connecting member;

[0017] The interior of the fixed adapter barrel is covered with internal threads, and the position adjustment structure is an external thread arranged on the outer wall of the signal coupling module and meshed with the signal coupling module.

[0018] Furthermore, the upper side wall of the lower cylinder is evenly provided with a plurality of notches, and the side wall of the upper base plate is provided with fixing screw holes, through which the fixing parts are engaged with the fixing screw holes, until the fixing parts are pressed and fitted with the outer cylinder wall of the lower cylinder, and the inner cylinder wall of the lower cylinder is pressed against the signal coupling module.

[0019] Furthermore, a through hole is provided on the top of the signal coupling module, and the connector on the tuning circuit board is led out from the through hole. The input RF signal directly acts on the coupling coil through the connector passing through one of the through holes, and the control end of the adjustable capacitor or inductor is led out from another through hole through another connector, wherein the connector is an SMA connector.

[0020] Furthermore, the lower end of the resonator body inputs the signal into the ion trap through a vacuum feedthrough adapter, and an adapter plate is arranged on the outer wall of the resonator body for introducing or leading out the main coil signal. A shielding shell is installed on the adapter plate, and an LC filter circuit is arranged on the shielding shell. The LC filter circuit is connected to a through-hole capacitor, and the through-hole capacitor is screwed onto the adapter plate and penetrated into the resonator body and then connected to the main coil.

[0021] Furthermore, the adapter plate is a copper adapter plate, and the shielding shell and the copper adapter plate are both provided with connecting countersunk holes, and the connecting bolts pass through the connecting countersunk holes to be fixed with the connecting threaded holes of the resonator body; the shielding shell and the copper adapter plate are provided with plug-in holes for installing through-hole capacitors.

[0022] On the other hand, the present invention also provides a method for adjusting a helical resonator that is easy to adjust coupling, wherein the helical resonator described above changes the relative position of the coupling coil in the coupling module and the main coil in the resonator body by rotating the threaded engagement between the signal coupling module and the fixed adapter to change the output impedance of the helical resonator;

[0023] The output impedance of the helical resonator is changed by connecting an adjustable capacitor or inductor in series or in parallel with the coupling coil.

[0024] Beneficial Effects

[0025] 1. The present invention breaks the conventional practice that the coupling device in the prior art cannot be adjusted. A signal coupling module and a fixed adapter are provided, wherein a coupling coil is installed in the signal coupling module. The longitudinal depth of the coupling coil can be continuously adjusted through the threaded engagement between the signal coupling module and the fixed adapter, thereby improving the defect that the original resonator has relatively single functionality and making the adjustment simple. Furthermore, an adjusting member is provided so that while the height of the coupling coil is continuously adjusted, the ground wire can be adjusted adaptively to avoid cumbersomeness caused by too much surplus ground wire and dragging caused by too little surplus ground wire. Furthermore, in order to avoid unnecessary shaking or displacement of the coupling coil after adjustment, a fixing member is provided to cooperate with the adjusting member. During adjustment, the fixing member is loosened from the coupling coil. After adjustment, the coupling coil is fixed.

[0026] 2. In the present invention, two methods are implemented to change the output impedance of the spiral resonant cavity, namely, by adjusting the position of the position adjustment mechanism, the mutual inductance between the coupling coil and the main line is adjusted by mechanical adjustment, thereby finally changing the output impedance of the spiral resonant cavity. The output impedance of the spiral resonant cavity is changed by non-mechanical adjustment by arranging an adjustable capacitor or inductor in series or parallel with the coupling coil on the tuning circuit board. The two methods can be combined. In the actual application process, the output impedance of the spiral resonant cavity can be preliminarily adjusted by mechanical adjustment and finely adjusted by non-mechanical adjustment, thereby finally achieving accurate adjustment of the output impedance of the spiral resonant cavity.

[0027] 3. The present application also claims protection for a spiral resonator. In fact, the LC filter circuit for providing a DC voltage is essentially a fourth-order Butterworth filter circuit. The bias voltage is input from VIN and output from VOUT after passing through the filter circuit. In the present application, the loss generated by the traditional RC filter circuit is greatly reduced by arranging a through-hole capacitor. Furthermore, the filter output is connected to the main coil using a through-hole capacitor. This approach further reduces the line loss generated by the traditional use of coaxial connecting wires, reduces the introduction of electrical noise, and further improves the Q value of the entire spiral resonator.

[0028] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram showing the installation of a coupling device in an embodiment of the present invention is shown;

[0031] Figure 2 A schematic diagram of an upper base plate in an embodiment of the present invention is shown;

[0032] Figure 3 A schematic cross-sectional diagram of the connection between the resonator body, the fixed adapter and the signal coupling module in an embodiment of the present invention is shown;

[0033] Figure 4 A three-dimensional schematic diagram of a fixed adapter in an embodiment of the present invention is shown;

[0034] Figure 5 A cross-sectional view of a signal coupling module in an embodiment of the present invention is shown.

[0035] Figure 6 A schematic diagram of a spiral resonator in an embodiment of the present invention is shown;

[0036] Figure 7 A schematic diagram of a shielding shell and a copper adapter plate in an embodiment of the present invention is shown;

[0037] Figure 8 The schematic diagram of the LC filter circuit in the embodiment of the present invention is shown;

[0038] Fig. 9 The schematic structural diagram shows the positional relationship between the main coil and the coupling coil in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] refer to Figure 1 , Figure 1 The schematic diagram of the coupling device in the embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that a spiral resonator that is easy to adjust the coupling includes a resonator body 1, a fixed adapter 2 and a signal coupling module 3; a main coil 4 is arranged inside the resonator body 1; a position adjustment structure, a tuning circuit board 6 and a coupling coil 5 are arranged on the signal coupling module 3; the signal coupling module 3 is fixed to the resonator body 1 through the fixed adapter 2; the position of the signal coupling module 3 relative to the resonator body 1 can be adjusted by adjusting the cooperation between the position adjustment structure and the fixed adapter 2, thereby adjusting the relative position between the coupling coil 5 and the main coil 4 ( Fig. 9 The schematic diagram of the structure shows the positional relationship between the main coil 4 and the coupling coil 5, so as to change the output impedance of the spiral resonator, which is a mechanical adjustment method to change the output impedance of the spiral resonator; the tuning circuit board 6 includes an adjustable capacitor or inductor, which is connected in series or in parallel with the coupling coil 5 to change the output impedance of the spiral resonator, which is a non-mechanical adjustment method to change the output impedance of the spiral resonator. By combining mechanical adjustment and non-mechanical adjustment (electrical signal adjustment), the output impedance of the spiral resonator can be accurately adjusted.

[0041] A detailed description is given below.

[0042] In the present invention, the resonator body 1 is in the shape of a cylinder with closed ends, wherein the resonator body 1 includes a shell body 12 , and the upper and lower ends of the shell body 12 are respectively connected to an upper bottom plate 11 and a lower bottom plate 13 to form a closed cylinder for accommodating the main coil 4 .

[0043] refer to Figure 2 , Figure 2 A schematic diagram of the upper base plate in an embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that a through hole 110 is vertically opened on the upper base plate 11, and a fixed adapter 2 is coaxially inserted in the through hole 110, and an adapter hole is opened on the lower base plate 13 for installing a vacuum feedthrough adapter.

[0044] The upper base plate 11 and the lower base plate 13 are connected by fixing bolts. Specifically, countersunk holes 14 are opened at the corners of the upper base plate 11, and threaded holes compatible with M6 bolts are opened at the corners of the lower base plate 13. The fixing bolts (the fixing bolts are M6 bolts) pass through the corresponding fixing countersunk holes 14 and threaded holes from top to bottom in sequence, and then are screwed together and fixed by fixing nuts. This installation improves the stability of the entire coupling device.

[0045] refer to Figure 3 and Figure 4 and Figure 5 , Figure 3 It shows a cross-sectional schematic diagram of the connection between the resonator body 1, the fixed adapter 2 and the signal coupling module in the embodiment of the present invention; Figure 4 A three-dimensional schematic diagram of a fixed adapter 2 in an embodiment of the present invention is shown; Figure 5 A cross-sectional view of a signal coupling module in an embodiment of the present invention is shown; Figure 2 It can be clearly seen that a fixed adapter 2 is coaxially inserted into the upper end of the resonator body 1. The fixed adapter 2 is cylindrical, and the signal coupling module 3 is threadedly connected in the cylinder cavity until the signal coupling module 3 is inserted into the resonator body 1. The fixed adapter 2 is a two-stage stepped cylinder, and the diameter of the upper cylinder 22 is larger than the diameter of the lower cylinder 21. The lower cylinder 21 is coaxially inserted into the through hole 110 until the lower end surface of the upper cylinder 22 is in contact with the upper surface of the upper base plate 11 and is fixed by a first connecting member.

[0046] The first connecting member includes a first screw. A plurality of first mounting holes 220 are opened on the upper cylinder 22. The first screw passes through the first mounting hole 220 and is connected to the first screw hole arranged on the upper base plate 11. There are generally 6 first mounting holes 220 here, which are arranged in a circular array along the axis of the upper cylinder 22.

[0047] The interior of the cylindrical cavity of the fixed adapter 2 is covered with internal threads, and the outer wall of the signal coupling module 3 is arranged with external threads engaged with the signal coupling module 3 .

[0048] A tuning circuit board 6 is installed in the signal coupling module 3, and a coupling coil 5 is welded under the tuning circuit board 6. Two through holes (a first through hole 311 and a second through hole 312) are provided on the top of the signal coupling module 3. The connector on the tuning circuit board 6 is led out from the two through holes 31. There are two connectors, both of which are SMA connectors. The SMA connectors use matching nuts and gaskets to fix the tuning circuit board 6 to the top of the signal coupling module 3. Since the coupling coil 5 is welded on the tuning circuit board 6, the input RF signal directly acts on the coupling coil 5 through the connector passing through the through hole 311.

[0049] The tuning circuit board 6 mainly includes an adjustable capacitor or inductor (not shown in the figure), which is connected in series (or in parallel) with the coupling coil 5 to change the impedance of the coupling coil 5 and the main coil 4 in the resonant cavity. That is, the control end of the adjustable capacitor or inductor is led out from the second through hole 312 through another connector, so that the adjustable capacitor or inductor can be remotely controlled by a level signal. When the adjustable capacitor or inductor can be remotely controlled by a level signal, the output impedance of the spiral resonator can be changed in a non-contact and non-mechanical adjustment manner.

[0050] The following is the principle of changing the output impedance of the spiral resonator by mechanical adjustment and non-mechanical adjustment, that is, the output impedance Z of the spiral resonator out The change of can be given by the following formula:

[0051]

[0052] Where X La , X Lc are the impedances of the main coil 4 and the coupling coil 5, k is the mutual inductance, Z0 is the characteristic impedance of the RF input terminal, and i is the imaginary number. From the above formula, it can be seen that when the mutual inductance k, the characteristic impedance of the RF input terminal Z0 and i remain unchanged, the impedance X of the main coil 4 La and coupling coil 5 impedance X Lc Is the influence of input impedance Z out Therefore, in the mechanical adjustment mode, by adjusting the distance between the coupling coil 5 and the main coil 4 (the adjustment mode belongs to contact adjustment, that is, by rotation), the mutual inductance between the coupling coil 5 and the main coil 4 changes, that is, the impedance X of the main coil 4 La and coupling coil 5 impedance X Lc changes, so that the input impedance Z out In the non-mechanical adjustment mode, the voltage at the control end of the adjustable capacitor or inductor is changed by remotely controlling the voltage level signal. Since the adjustable capacitor or inductor is connected in series or in parallel with the coupling coil 5, the impedance of the coupling coil 5 is X LcThe input impedance Z out The output impedance Z of the spiral resonator can be changed by out The two methods can be selected at will, which is convenient to use and can be used together. The accuracy of the adjustment can also be greatly enhanced, solving the shortcomings of the traditional solution.

[0053] The coupling distance between the coupling coil 5 and the main coil 4 is adjusted by threaded engagement between the signal coupling module 3 and the fixed adapter 2;

[0054] A channel 32 is provided on the inner wall of the signal coupling module 3, and illustratively, the aperture of the transverse section of the channel 32 is 2 mm, the depth is 24 mm, and the longitudinal section of the channel 32 is an inverted L-shape. The ground wire of the coupling coil 5 is led out from the channel 32 and grounded, and is penetrated from the outside to the channel 32 along the radial direction of the signal coupling module 3 through the adjusting member, and is pressed against the ground wire.

[0055] The adjusting member includes an adjusting screw hole 30 and an adjusting screw. The side wall of the signal coupling module 3 is radially provided with an adjusting screw hole 30 , which is communicated with the channel 32 . The adjusting screw hole 30 is threadedly engaged with the adjusting screw until the adjusting screw is pressed against the ground wire.

[0056] A notch 210 is provided on the cylindrical wall of the fixed adapter 2 , and the fixing member passes through the upper base plate 11 from the outside along the radial direction of the signal coupling module 3 and can be pressed against the outer cylindrical wall of the fixed adapter 2 .

[0057] The fixing part includes a fixing screw. A plurality of notches 210 are evenly provided on the upper side wall of the lower tube 21. A fixing screw hole 111 is provided on the side wall of the upper base plate 11. The fixing screw is engaged with the fixing screw hole 111 until the fixing screw is pressed against the outer tube wall of the lower tube 21 and the inner tube wall of the lower tube 21 is pressed against the signal coupling module 3 to stabilize the signal coupling module 3.

[0058] In the present invention, the fixed adapter 2 is not necessarily an independent device, but can also be a fixed component on the resonator body 1, for example Figure 3 The upper tube 22 of the fixed adapter 2 is integrally formed with the corresponding upper bottom plate 11, while the lower tube 21 of the fixed adapter 2 is not integrally formed with the corresponding upper bottom plate 11, but is only closely attached to the through hole 110 of the upper tube 22. Alternatively, the fixed adapter 2 is a thread or a slot disposed on the resonator body 1, and its function is to fix the signal coupling module 3 and realize position adjustment, for example, the fixed adapter 2 is a slot integrally formed with the through hole 110 of the fixed adapter 2; or the fixed adapter 2 is a thread provided on the inner wall of the through hole 110.

[0059] The present invention breaks the conventional practice in the prior art that the coupling device cannot be adjusted, and provides a signal coupling module and a fixed adapter 2, wherein a coupling coil 5 is installed in the signal coupling module, and the height of the coupling coil 5 can be continuously adjusted through the threaded engagement between the signal coupling module and the fixed adapter 2, thereby improving the defect of the original resonator having relatively single functionality and making the adjustment simple. Furthermore, an adjusting member is also thoughtfully provided, so that while the height of the coupling coil 5 is continuously adjusted, the ground wire can be adaptively adjusted to avoid cumbersomeness caused by too much excess ground wire and dragging caused by too little excess ground wire. Furthermore, in order to avoid unnecessary shaking or displacement of the coupling coil 5 after adjustment, a fixing member is provided, which can cooperate with the adjusting member. During adjustment, the fixing member and the coupling coil 5 are loosened, and after adjustment, the coupling coil 5 is fixed.

[0060] In the present invention, the lower end of the resonator body 1 inputs the signal into the ion trap through a vacuum feedthrough adapter, and an adapter plate 41 is arranged on the outer wall of the resonator body 1, a shielding shell 42 is installed on the adapter plate 41, and an LC filter circuit is arranged on the shielding shell 42. The LC filter circuit is connected to the through-hole capacitor. The through-hole capacitor body is a screw, and the through-hole capacitor is screwed (i.e. installed) to the threaded hole opened on the adapter plate 41.

[0061] refer to Figure 6 and Figure 7 , Figure 6 A schematic diagram of a spiral resonator in an embodiment of the present invention is shown; Figure 7 A schematic diagram of a shielding shell 42 and a copper adapter plate in an embodiment of the present invention is shown; Figure 5 It can be clearly seen that the spiral resonator includes an adapter plate 41, which is a copper adapter plate. The shielding shell 42 and the copper adapter plate are both provided with connecting countersunk holes 43, and the connecting bolts pass through the second countersunk holes. The second countersunk holes are Φ3, and there are 4 of them, which are respectively placed at the four corners of the back of the shielding shell 42 and the copper adapter plate to be fixed with the connecting threaded holes of the resonator body 1. The shielding shell 42 is provided with an insert hole 420, which is used to allow one end of the through-hole capacitor screwed on the adapter plate 41 to pass through the insert hole 420. The shielding shell 42 is also provided with a through hole 44, and another SMA connector is installed in the through hole 44, and the SMA connector is welded to the circuit board of the LC filter circuit after passing through the through hole 44.

[0062] The existing RC filter circuit has a large power loss due to the existence of resistance, which leads to a decrease in the overall Q value of the system. Figure 8 , Figure 8The schematic diagram of the principle of the LC filter circuit in the embodiment of the present invention is shown; it can be clearly seen from the schematic diagram that, in fact, the LC filter circuit for providing DC voltage is essentially a fourth-order Butterworth filter circuit, that is, the circuit includes capacitors C1, C2, C3, C4, C5, C6, C7 and C8 connected in parallel, wherein inductors L2, L3, L4 and L5 are connected between C1 and C2, between C3 and C4, between C5 and C6, and between C7 and C8, respectively, the bias voltage is input from VIN (one end of C1), and after passing through the filter circuit, it is output from VOUT1 (one end of C8) and enters the through-hole capacitor, wherein a pad with an aperture of 2 mm is provided on the circuit board of the LC filter circuit, one end of the through-hole capacitor passes through the plug-in hole 420 of the shielding shell 42 to be welded to the pad on the circuit board to form an electrical connection, and is finally connected to VOUT1, and the other end of the through-hole capacitor is connected to the main coil. The capacitors in the circuit use high-Q value and low-temperature drift capacitors, and the inductors use high-shielded winding inductors, which greatly reduce the loss generated by traditional RC filter circuits. The filter output uses a through-hole capacitor to connect to the main coil.

[0063] In addition, refer to Figure 6 In order to sample the RF signal input to the ion trap, an inner hole 15 matching a connector is reserved on the housing body 12. The RF signal can be sampled by capacitor voltage division. The high Q value voltage division capacitor is welded on the ceramic substrate circuit board and can be connected to the sampling coil led out of the main coil inside the housing body 12. The sampling signal is output through the SMA connector, which is convenient for subsequent processing or monitoring of the signal.

[0064] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spiral resonator that is easy to adjust coupling, characterized in that: It comprises a resonator body (1), a fixed adapter (2) and a signal coupling module (3); A main coil (4) is arranged inside the resonator body (1); The signal coupling module (3) is provided with a position adjustment structure, a tuning circuit board (6) and a coupling coil (5); The signal coupling module (3) is connected to the resonator body (1) via the fixed adapter (2); The position of the signal coupling module (3) relative to the resonator body (1) can be adjusted by adjusting the cooperation between the position adjustment structure and the fixed adapter (2), thereby adjusting the relative position between the coupling coil (5) and the main coil (4) to change the output impedance of the helical resonator; The tuning circuit board (6) is provided with an adjustable capacitor or inductor, and the adjustable capacitor or inductor is connected in series or in parallel with the coupling coil to change the output impedance of the spiral resonator.

2. A helical resonator for easy coupling adjustment according to claim 1, characterized in that: The upper end of the resonator body (1) is coaxially plugged with a fixed adapter (2); the fixed adapter (2) is cylindrical, and a signal coupling module (3) is threadedly connected in the cylindrical cavity; the signal coupling module (3) is inserted into the resonator body (1); a tuning circuit board (6) is installed in the signal coupling module (3); a coupling coil (5) is connected below the tuning circuit board (6); and the relative position between the coupling coil and the main coil is adjusted by threaded engagement between a position adjustment structure and the fixed adapter (2).

3. A helical resonator for easy coupling adjustment according to claim 1, characterized in that: The inner wall of the signal coupling module (3) is provided with a channel (32), and the longitudinal section of the channel (32) is in an inverted L shape; the ground wire of the coupling coil (5) is led out through the channel (32) and grounded, and the adjustment member is inserted into the channel (32) from the outside and pressed against the ground wire.

4. The helical resonator for easy coupling adjustment according to claim 1, characterized in that: The resonator body (1) comprises a shell body (12), the upper and lower ends of the shell body (12) are respectively connected to an upper bottom plate (11) and a lower bottom plate (13), forming a closed cylinder for accommodating the main coil; The upper base plate (11) is vertically provided with a through hole (110), the fixed adapter (2) is coaxially inserted into the through hole (110), and the lower base plate (13) is provided with an adapter hole for installing a vacuum feedthrough adapter; The upper base plate (11) and the lower base plate (13) are connected by fixing bolts.

5. The helical resonator for easy coupling adjustment according to claim 3, characterized in that: The fixed adapter (2) is in the shape of a two-stage stepped cylinder, and the diameter of the upper cylinder (22) is larger than that of the lower cylinder (21). The lower cylinder (21) is coaxially inserted into the through hole (110) until the lower end surface of the upper cylinder (22) is in contact with the upper surface of the upper base plate (11), and is fixed by a first connecting member. The interior of the barrel cavity of the fixed adapter (2) is covered with internal threads, and the position adjustment structure is an external thread arranged on the outer wall of the signal coupling module (3) and meshing with the signal coupling module (3).

6. A helical resonator for easy coupling adjustment according to claim 5, characterized in that: The upper side wall of the lower tube (21) is evenly provided with a plurality of notches (210), and the side wall of the upper base plate (11) is provided with a fixing screw hole (111). The fixing piece is engaged with the fixing screw hole (111), and the fixing piece is pressed against the outer tube wall of the lower tube (21), and the inner tube wall of the lower tube (21) is pressed against the signal coupling module (3).

7. A helical resonator for easy coupling adjustment according to any one of claims 1 to 6, characterized in that: A through hole (31) is provided on the top of the signal coupling module (3); a connector on the tuning circuit board (6) is led out through the through hole (31); an input radio frequency signal directly acts on the coupling coil via a connector passing through one of the through holes (31); a control end of the adjustable capacitor or inductor is led out from another through hole (31) via another connector; wherein the connector is an SMA connector.

8. A helical resonator for easy coupling adjustment according to any one of claims 1 to 6, characterized in that: The lower end of the resonator body (1) inputs a signal into the ion trap via a vacuum feedthrough adapter, and an adapter plate (41) is arranged on the outer wall of the resonator body (1) for introducing or leading out a main coil signal, a shielding shell (42) is installed on the adapter plate (41), an LC filter circuit is arranged on the shielding shell (42), and the LC filter circuit is connected to a through-hole capacitor, and the through-hole capacitor is screwed onto the adapter plate (41) and penetrates into the resonator body (1) to be connected to the main coil.

9. The helical resonator for easy coupling adjustment according to claim 8, characterized in that: The adapter plate (41) is a copper adapter plate, and the shielding shell (42) and the copper adapter plate are both provided with connection countersunk holes (43), and the connection bolts pass through the connection countersunk holes (43) to be fixed to the connection threaded holes of the resonator body (1); and the shielding shell (42) and the copper adapter plate are provided with plug-in holes (420) for installing through-hole capacitors.

10. A method for adjusting a helical resonator for adjusting coupling, wherein the helical resonator is a helical resonator as claimed in any one of claims 1 to 9, characterized in that: By rotating the threaded engagement between the signal coupling module (3) and the fixed adapter (2), the relative position of the coupling coil (5) in the coupling module (3) and the main coil in the resonator body (1) is changed to change the output impedance of the helical resonator; The output impedance of the helical resonator is changed by connecting an adjustable capacitor or inductor in series or in parallel with the coupling coil.

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