A spiral resonator and a method of adjusting coupling

Abstract

The application provides a spiral resonator convenient to adjust coupling, which comprises a resonator main body, a fixed adapter and a signal coupling module; the resonator main body is internally provided with a main coil; the signal coupling module is provided with a position adjusting structure, a tuning circuit board and a coupling coil; 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 through the cooperation of the position adjusting structure and the fixed adapter, so as to adjust the relative position between the coupling coil and the main coil, and change the output impedance of the spiral resonator; the tuning circuit board is provided with an adjustable capacitor or inductor, and the adjustable capacitor or inductor is connected in series or parallel with the coupling coil to change the output impedance of the spiral resonator. The longitudinal depth of the coupling coil can be continuously adjusted, and the defect that the original resonator has relatively single function is improved.

Description

Technical Field

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

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

[0003] Trapping ions is achieved primarily through two pairs of electrodes: DC electrodes and radio frequency electrodes. The RF signal is amplified by a radio frequency amplifier from a signal source, coupled into a helical resonator, and then applied to the radio frequency electrodes of the trap.

[0004] A spiral resonator is primarily composed of a coupling coil (antenna) and a main coil, and its primary function is voltage gain. The coupling coil is used to impedance match (couple) the RF source end with the circuit formed by the main coil and the well capacitor. In existing spiral resonators, 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. Furthermore, there is the problem that the coupling coil cannot be continuously adjusted, making impedance matching difficult. Summary of the Invention

[0005] In response to 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 provided 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 parallel with the coupling coil to change the output impedance of the spiral resonator.

[0011] Further, the resonator main body is coaxially inserted with a fixed adapter at the upper end, the fixed adapter is in a cylindrical shape, and a signal coupling module is threadedly connected in the cylindrical cavity, the signal coupling module is inserted into the resonator main body, a tuning circuit board is arranged in the signal coupling module, a coupling coil is connected below the tuning circuit board, and the relative position between the coupling coil and the main coil is adjusted through the thread engagement between the position adjusting structure and the fixed adapter.

[0012] Further, a channel is arranged on the inner wall of the signal coupling module, the longitudinal section of the channel is in an inverted L shape, the ground wire of the coupling coil is led out to be grounded through the channel, and the adjusting member is penetrated from the outside to the channel and is in abutting engagement with the ground wire.

[0013] Further, the resonator main body comprises a shell body, upper and lower bottom plates are connected to the upper and lower ends of the shell body respectively to form a closed barrel for arranging the main coil.

[0014] A through hole is vertically arranged on the upper bottom plate, the fixed adapter is coaxially inserted into the through hole, and an adapter hole is arranged on the lower bottom plate to mount a vacuum feedthrough adapter.

[0015] The upper and lower bottom plates are connected through fixing bolts.

[0016] Further, the fixed adapter is in a two-section stepped cylindrical shape, the diameter of the upper cylinder is larger than that of the lower cylinder, the lower cylinder is coaxially inserted into the through hole, the upper end surface of the upper cylinder is abutted with the upper surface of the upper bottom plate, and the fixed adapter is fixed through a first connecting member.

[0017] The cylindrical cavity of the fixed adapter is fully threaded, and the position adjusting structure is an external thread arranged on the outer wall of the signal coupling module and engaged with the external thread.

[0018] Further, a plurality of notches are uniformly arranged on the side wall of the lower cylinder, a fixing screw hole is arranged on the side wall of the upper bottom plate, a fixing member is engaged with the fixing screw hole, the fixing member is in abutting engagement with the outer side wall of the lower cylinder, and the inner side wall of the lower cylinder is in abutting engagement with the signal coupling module.

[0019] Further, a through hole is arranged on the top of the signal coupling module, a connector on the tuning circuit board is led out through the through hole, the input radio frequency signal directly acts on the coupling coil through the connector of one of the through holes, and the control end of the adjustable capacitor or inductor is led out through the connector of the other through hole, wherein the connector is an SMA connector.

[0020] Further, the lower end of the resonator body is connected to the ion trap through a vacuum feedthrough adapter, and a transition plate is arranged on the outer wall of the resonator body for introducing or leading out the signal of the main coil, a shielding shell is mounted on the transition plate, the shielding shell is arranged with an LC filter circuit, the LC filter circuit is connected with a through-hole capacitor, the through-hole capacitor is screwed to the transition plate and penetrates into the resonator body to be connected with the main coil.

[0021] Further, the transition plate is a copper transition plate, and the shielding shell and the copper transition plate are both provided with a connecting counterbore through which a connecting bolt is passed to be fixed with a connecting threaded hole of the resonator body; the shielding shell and the copper transition plate are provided with an insert hole for mounting the through-hole capacitor.

[0022] On the other hand, the application also provides an adjusting method of the spiral resonator for facilitating the adjustment of coupling, the spiral resonator is the spiral resonator described above, the relative position of the coupling coil in the coupling module and the main coil in the resonator body is changed by rotating the thread engagement between the signal coupling module and the fixed adapter to change the output impedance of the spiral resonator.

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

[0024] Advantages

[0025] 1、The application breaks the conventional coupling device which cannot be adjusted in the prior art, the signal coupling module and the fixed adapter are arranged, the coupling coil is arranged in the signal coupling module, and the longitudinal depth of the coupling coil can be continuously adjusted through the thread engagement between the signal coupling module and the fixed adapter, the defect that the functionality of the original resonator is relatively single is improved, the adjustment is simple, further, the adjusting member is matched, the height of the coupling coil can be continuously adjusted, and the ground wire can be adjusted adaptively, so that the excess ground wire is avoided to be cumbersome, and the too little ground wire is avoided to be dragged; further, in order to avoid unnecessary shaking or deviation of the coupling coil after adjustment, the fixing member is arranged, the fixing member can be matched with the adjusting member, the fixing member is loosened from the coupling coil during adjustment, and the coupling coil is fixed after adjustment.

[0026] 2. The present invention achieves two ways to change the output impedance of the spiral resonator: first, through position adjustment of the position adjustment mechanism, mechanical adjustment of the mutual inductance between the coupling coil and the main line is achieved, thereby ultimately changing the output impedance of the spiral resonator. Furthermore, by providing an adjustable capacitor or inductor in series or parallel with the coupling coil on a tuning circuit board, non-mechanical adjustment of the output impedance of the spiral resonator is achieved. These two methods can be combined. In actual application, the output impedance of the spiral resonator can be initially adjusted by mechanical adjustment, while fine-tuning the output impedance of the spiral resonator by non-mechanical adjustment, ultimately achieving precise adjustment of the output impedance of the spiral resonator.

[0027] 3. This application also claims protection for a spiral resonator. In fact, the LC filter circuit used to provide 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 this 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 in part will become apparent from the description, or will be understood by practicing 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 is a brief introduction to 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 any creative work.

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

[0031] Figure 2 Shows a schematic diagram of the upper base plate in an embodiment of the present invention;

[0032] Figure 3 A cross-sectional diagram showing 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 shows a schematic diagram of a spiral resonator in an embodiment of the present invention;

[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 figure shows the principle diagram of the LC filter circuit in an embodiment of the present invention;

[0038] Figure 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] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 making creative efforts shall fall within the scope of protection of the present invention.

[0040] refer to Figure 1 , Figure 1 FIG2 shows a schematic diagram of a coupling device according to an embodiment of the present invention; it can be clearly seen from the schematic diagram that a spiral resonator for easily adjusting coupling comprises a resonator body 1, a fixed adapter 2 and a signal coupling module 3; a main coil 4 is provided inside the resonator body 1; a position adjustment structure, a tuning circuit board 6 and a coupling coil 5 are provided 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 ( Figure 9 The schematic diagram shows the positional relationship between the main coil 4 and the coupling coil 5 to change the output impedance of the spiral resonator. This is a mechanical adjustment method for changing the output impedance of the spiral resonator. The tuning circuit board 6 includes an adjustable capacitor or inductor, which is connected in series or parallel with the coupling coil 5 to change the output impedance of the spiral resonator. This is a non-mechanical adjustment method for changing 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 precisely adjusted.

[0041] The following will be described in detail.

[0042] In the present application, the resonator body 1 is a closed barrel shape, wherein the resonator body 1 comprises a shell body 12, the upper and lower ends of the shell body 12 are respectively connected with an upper bottom plate 11 and a lower bottom plate 13, forming a closed barrel for placing the main coil 4.

[0043] Reference Figure 2 , Figure 2 The schematic diagram of the upper bottom plate in the embodiment of the present application is shown; it can be clearly seen from the schematic diagram that the upper bottom plate 11 is vertically provided with a through hole 110, and the fixed adapter 2 is coaxially inserted into the through hole 110, and the lower bottom plate 13 is provided with an adapter hole for installing a vacuum feedthrough adapter.

[0044] The upper bottom plate 11 and the lower bottom plate 13 are connected by fixed bolts; specifically, the corner of the upper bottom plate 11 is provided with a counterbore 14, and the corners of the lower bottom plate 13 are each provided with a threaded hole matched with an M6 bolt, and the fixed bolts (the fixed bolts are M6 bolts) are sequentially inserted from top to bottom through the corresponding fixed counterbores 14 and threaded holes, and are fixed by screwing a fixed nut; this installation improves the stability of the entire coupling device.

[0045] Reference Figure 3 and Figure 4 and Figure 5 , Figure 3 The connection cross-sectional view of the resonator body 1, the fixed adapter 2 and the signal coupling module in the embodiment of the present application is shown; Figure 4 The three-dimensional schematic diagram of the fixed adapter 2 in the embodiment of the present application is shown; Figure 5 The cross-sectional view of the signal coupling module in the embodiment of the present application is shown; Figure 2 It can be clearly seen from the cross-sectional view that the upper end of the resonator body 1 is coaxially inserted with the fixed adapter 2, the fixed adapter 2 is in a cylindrical shape, and the signal coupling module 3 is threadedly connected in the cylindrical cavity of the fixed adapter 2, until the signal coupling module 3 is inserted into the resonator body 1, the fixed adapter 2 is a two-section stepped cylindrical shape, and the diameter of the upper cylinder 22 is greater 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 attached to the upper surface of the upper bottom plate 11, and is fixed by the first connecting piece.

[0046] The first connecting piece comprises a first screw, a plurality of first mounting holes 220 are provided on the upper cylinder 22, the first screw passes through the first mounting holes 220 and is connected with the first screw hole arranged on the upper bottom plate 11, and there are generally six first mounting holes 220 arranged in a ring array along the axis of the upper cylinder 22.

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

[0048] The signal coupling module 3 is provided with a tuning circuit board 6, the coupling coil 5 is welded below the tuning circuit board 6, two through holes (a first through hole 311 and a second through hole 312) are formed in the top of the signal coupling module 3, the connectors on the tuning circuit board 6 are led out by the two through holes 31, the connectors are two SMA connectors, and the SMA connectors are used with nuts and washers matched therewith to fix the tuning circuit board 6 at the top in the signal coupling module 3; since the coupling coil 5 is welded on the tuning circuit board 6, the input radio frequency signal directly acts on the coupling coil 5 through the connector of the through hole 311.

[0049] The tuning circuit board 6 mainly comprises an adjustable capacitor or inductor (not shown in the figure), the adjustable capacitor or inductor is connected in series (or parallel) with the coupling coil 5 and is used for changing 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 by the second through hole 312 through another connector, so that the adjustable capacitor or inductor can be remotely controlled by a level signal, and when the adjustable capacitor or inductor can be remotely controlled by a level signal, the non-contact and non-mechanical adjustment mode is realized to change the output impedance of the spiral resonator.

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

[0051]

[0052] Wherein X La , X Lc are the impedances of the main coil 4 and the coupling coil 5 respectively, k is the mutual inductance coefficient, Z0 is the characteristic impedance of the RF input end, and i is the imaginary symbol. It can be known from the above formula that, in the case that the mutual inductance coefficient k, the characteristic impedance of the RF input end Z0 and i are constant, the impedances X La of the main coil 4 and X Lc of the coupling coil 5 are the main factors affecting the input impedance Z out , therefore, in the mechanical adjustment mode, the mutual inductance between the coupling coil 5 and the main coil 4 is changed by adjusting the distance between the coupling coil 5 and the main coil 4 (the adjustment mode belongs to the contact adjustment, that is, the adjustment can be realized by rotation), so that the impedances X La of the main coil 4 and X Lc of the coupling coil 5 are changed, thereby changing the input impedance Z out . In the non-mechanical adjustment mode, the voltage of the control end of the adjustable capacitor or inductor is changed by remotely controlling the adjustable capacitor or inductor through a level signal, and since the adjustable capacitor or inductor is connected in series or parallel with the coupling coil 5, the impedance X LcThe change can also make the input impedance Z out The change, thus, the output impedance Z out The change, thus, the output impedance Z

[0053] The coupling distance between the coupling coil 5 and the main coil 4 is adjusted through the thread engagement between the signal coupling module 3 and the fixed adapter 2.

[0054] The inner wall of the signal coupling module 3 is provided with a channel 32, and the transverse cross-section of the channel 32 is 2mm in diameter and 24mm in depth, and the longitudinal cross-section of the channel 32 is inverted L-shaped, the ground wire of the coupling coil 5 is led out through the channel 32 and grounded, and the ground wire is pressed and matched by adjusting the member from the outside to the channel 32 along the radial direction of the signal coupling module 3.

[0055] The adjusting member includes an adjusting screw hole 30 and an adjusting screw, the side wall of the signal coupling module 3 is provided with the adjusting screw hole 30 along the radial direction, the adjusting screw hole 30 is in communication with the channel 32, the adjusting screw hole 30 is in thread engagement with the adjusting screw, and the adjusting screw is pressed and matched with the ground wire.

[0056] The fixed adapter 2 is provided with a notch 210 on the barrel wall, and the fixed member is passed through the upper bottom plate 11 along the radial direction of the signal coupling module 3 from the outside, and can be pressed against the outer barrel wall of the fixed adapter 2.

[0057] The fixed member includes a fixed screw, the upper side wall of the lower barrel 21 is uniformly provided with a plurality of notches 210, and the side wall of the upper bottom plate 11 is provided with a fixed screw hole 111, the fixed screw is engaged with the fixed screw hole 111, and the fixed screw is pressed and matched with the outer barrel wall of the lower barrel 21, and the inner barrel wall of the lower barrel 21 is tightly pressed against the signal coupling module 3, so as to stabilize the signal coupling module 3.

[0058] In the present application, the fixed adapter 2 is not necessarily an independent device, but also can be a fixed component on the resonator body 1, for example Figure 3 The upper barrel 22 of the fixed adapter 2 is integrally formed with the corresponding upper bottom plate 11, and the lower barrel 21 of the fixed adapter 2 is not integrally formed with the corresponding upper bottom plate 11, but is tightly attached to the through hole 110 of the upper barrel 22. Or the fixed adapter 2 is a thread or a slot provided 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 application breaks the conventional of the coupling device unable to adjust in the prior art, by setting a signal coupling module and a fixed adapter 2, wherein a coupling coil 5 is arranged 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, the original defect that the functionality of the resonator is relatively single is improved, the adjustment is simple, further, the adjusting part is further matched, so that the ground wire can be adjusted adaptively while the height of the coupling coil 5 is continuously adjusted, and the excess ground wire is avoided to cause the encumbrance, and the too little ground wire is avoided to cause the dragging, further, in order to avoid unnecessary shaking or deviation of the coupling coil 5 after adjustment, the fixing part is arranged, and the fixing part is matched with the adjusting part, the fixing part is loosened from the coupling coil 5 during adjustment, and the coupling coil 5 is fixed after adjustment.

[0060] In the application, the lower end of the resonator main body 1 inputs signals into the ion trap through the vacuum feedthrough adapter, the outer wall of the resonator main body 1 is provided with an adapter plate 41, the adapter plate 41 is provided with a shielding shell 42, the shielding shell 42 is provided with an LC filter circuit, the LC filter circuit is connected with a through-hole capacitor, and the main body of the through-hole capacitor is a screw.

[0061] Reference Figure 6 and Figure 7 , Figure 6 A schematic diagram of a spiral resonator in the embodiment of the application is shown in the figure; Figure 7 A schematic diagram of the shielding shell 42 and the copper adapter plate in the embodiment of the application is shown in the figure; Figure 5 As can be clearly seen in the figure, the spiral resonator comprises an adapter plate 41, the adapter plate 41 is a copper adapter plate, the shielding shell 42 and the copper adapter plate are both provided with connecting counterbores 43, a connecting bolt passes through the second counterbores, the second counterbores are Φ3, there are four of them, and they are arranged at four corners of the back surface of the shielding shell 42 and the copper adapter plate to be fixed with the connecting threaded holes of the resonator main body 1. The shielding shell 42 is provided with a plug hole 420, which is used for enabling the end of the through-hole capacitor screwed on the adapter plate 41 to pass through the plug hole 420, the shielding shell 42 is also provided with a through hole 44, another SMA connector is arranged in the through hole 44, and the SMA connector is welded with the circuit board of the LC filter circuit after passing through the through hole 44.

[0062] The existing RC filter circuit has large power loss due to the existence of the resistor, which leads to the decrease of the overall Q value of the system, and reference Figure 8 , Figure 8A schematic diagram of the principle of an LC filter circuit in an 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 a 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. A solder 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 and is soldered to the solder pad on the circuit board to form an electrical connection, and is finally connected to VOUT1. 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, reference Figure 6 To sample the RF signal input to the ion trap, the housing 12 includes an inner hole 15 adapted for a connector. RF signal sampling can be performed using capacitive voltage divider technology. High-Q voltage divider capacitors are soldered to a ceramic-based circuit board and connected to the sampling coil extending from the main coil within the housing 12. The sampled signal is then output via an SMA connector, facilitating subsequent signal processing or monitoring.

[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 replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to 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 provided 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), wherein the upper end of the resonator body (1) is coaxially plugged into 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), wherein the cooperation is adjusted by screw thread engagement 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 facilitating coupling adjustment according to claim 1, characterized in that: The fixed adapter (2) is cylindrical, and the signal coupling module (3) is threadedly connected to the inner cavity of the cylinder until 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), and a coupling coil (5) is connected below the tuning circuit board (6).

3. The helical resonator with easy-to-adjust coupling 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 cross-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 with easy-to-adjust coupling according to claim 2, characterized in that: The resonator body (1) comprises a shell body (12), wherein the upper and lower ends of the shell body (12) are respectively connected to an upper base plate (11) and a lower base plate (13), forming a closed cylinder for accommodating the main coil (4); A through hole (110) is vertically provided on the upper base plate (11), and the fixed adapter (2) is coaxially plugged into the through hole (110); and a transfer hole is provided on the lower base plate (13) 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 with easy-to-adjust coupling according to claim 3, characterized in that: 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. The interior of the cylindrical 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. The helical resonator with easy-to-adjust coupling according to claim 5, characterized in that: The upper side wall of the lower cylinder (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 member is engaged with the fixing screw hole (111), and the fixing member is pressed against the outer wall of the lower cylinder (21), and the inner wall of the lower cylinder (21) is pressed against the signal coupling module (3).

7. A helical resonator with easy-to-adjust coupling 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 (5) via a connector passing through one of the through holes (31), and 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 with easy coupling adjustment according to any one of claims 1 to 6, characterized in that: 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) for introducing or leading out the main coil signal. 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 a through-hole capacitor, and the through-hole capacitor is screwed onto the adapter plate (41) and penetrates the resonator body (1) to be connected to the main coil (4).

9. The helical resonator with 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); 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 facilitating coupling adjustment, wherein the helical resonator is the helical resonator according to 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 spiral resonator is changed by connecting an adjustable capacitor or inductor in series or in parallel with the coupling coil (5).

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