Coupling device applied to spiral resonator

Abstract

The utility model provides a coupling device applied to a spiral resonator. The coupling device comprises a fixed adapter, a signal coupling module and a main coil arranged in a resonator main body, a position adjusting structure, a tuning circuit board and a coupling coil are arranged on the signal coupling module, and the coupling coil is connected below the tuning circuit board; the signal coupling module is connected to the resonator main body through the fixed adapter, and the position of the signal coupling module relative to the resonator main body can be adjusted by adjusting the cooperation of the position adjusting structure and the fixed adapter. According to the utility model, the longitudinal depth of the coupling coil can be continuously adjusted.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of quantum computation, especially relates to a coupling device applied to spiral resonator. BACKGROUND

[0002] Quantum computation is one of the important topics of modern experiment and also a frontier field with wide prospect. Common quantum computation platforms include cold atom system, solid-state NV color center (a luminescent point defect in diamond), superconductor and ion trap system. Ion trap is an experimental device for trapping ions. Ions have the advantages of high detection fidelity, long coherence time and good expansibility as quantum bits. The advantages can be effectively exerted only when ions are stably bound in a potential well. Therefore, a stable and convenient ion trap electric system is particularly important for ion quantum computation.

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

[0004] The spiral resonator mainly consists of a coupling coil (antenna) and a main coil. Its main function is voltage gain. The coupling coil is used for impedance matching (coupling) between the RF source end and the circuit composed of the main coil and the trap capacitor. In the existing spiral resonator, impedance matching is performed by only changing the distance between the coupling coil and the main coil. This method is time-consuming and laborious. For example, the spiral resonator may need to be disassembled in contact to adjust the impedance between the coupling coil and the main coil. Moreover, the coupling coil cannot be continuously adjusted, which makes it difficult to perform impedance matching. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model provides a coupling device applied to a spiral resonator:

[0006] The coupling device comprises a fixed adapter, a signal coupling module and a main coil arranged inside a resonator main body.

[0007] The signal coupling module is provided with a position adjusting structure, a tuning circuit board and a coupling coil. The coupling coil is welded to the tuning circuit board.

[0008] 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 position adjusting structure and the fixed adapter.

[0009] Further, the resonator body upper end coaxial plug-in fixed adapter, the fixed adapter is cylindrical, and the threaded connection signal coupling module in the barrel cavity, the signal coupling module is inserted into the resonator body, the tuning circuit board is arranged in the signal coupling module, the relative position between the coupling coil and the main coil is adjusted by the thread engagement between the position adjusting structure and the fixed adapter.

[0010] Further, the signal coupling module inner wall is provided with a channel, and the longitudinal section of the channel is in inverted L shape; the ground wire of the coupling coil is led out to ground through the channel, and is further matched with an adjusting piece, the adjusting piece is penetrated into the channel from the outside, and is in abutting engagement with the ground wire.

[0011] Further, the resonator body comprises a shell body, and the upper and lower ends of the shell body are connected with an upper bottom plate and a lower bottom plate respectively, forming a closed barrel for arranging the main coil;

[0012] The upper bottom plate is vertically provided with a through hole, and the fixed adapter is coaxially inserted into the through hole; the lower bottom plate is provided with an adapter hole for mounting a vacuum feedthrough adapter;

[0013] The upper bottom plate and the lower bottom plate are connected by fixed bolts.

[0014] Further, the fixed adapter is a two-section stepped cylindrical shape, and the upper cylinder diameter is larger than the lower cylinder diameter; 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 is fixed by a first connecting piece;

[0015] The fixed adapter barrel cavity is full of internal threads, and the position adjusting structure is external threads arranged on the outer wall of the signal coupling module and engaged with the external threads.

[0016] Further, the lower cylinder wall is uniformly provided with a plurality of notches on the side wall, the upper bottom plate side wall is provided with a fixed screw hole, the fixed piece is engaged with the fixed screw hole, the fixed piece is in abutting engagement with the outer cylinder wall of the lower cylinder, and the inner cylinder wall of the lower cylinder is in abutting engagement with the signal coupling module.

[0017] Further, the signal coupling module top is provided with a through hole, the 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 other through hole by the other connector, wherein the connector is an SMA connector.

[0018] Further, the resonator body lower end is connected with the signal input ion trap through the vacuum adapter, and the resonator body outer wall is provided with an adapter plate for leading in or leading out the main coil signal, and the adapter plate is provided with a shielding shell, and the shielding shell is provided with an LC filter circuit.

[0019] Further, 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.

[0020] Further, the adapter plate is a copper adapter plate, and the shielding shell and the copper adapter plate are both provided with a connecting counterbore, and a connecting bolt passes through the connecting counterbores to be fixed with a connecting threaded hole of the resonator body.

[0021] Beneficial effects

[0022] The utility model breaks the conventional that coupling device cannot be adjusted in prior art, through setting up signal coupling module and fixed adapter piece, wherein, signal coupling module is equipped with coupling coil, and the longitudinal depth of coupling coil can be continuously adjusted through the thread engagement between signal coupling module and fixed adapter piece, the defect that the functionality of original resonator is relatively single is improved, and the adjustment is simple, further, the adjustment piece is matched, so that the ground wire can be adjusted adaptively while the height of coupling coil is continuously adjusted, and the excess ground wire is avoided to cause encumbrance, and the ground wire is too little to cause drag; further, in order to avoid unnecessary shaking or deviation of coupling coil after adjustment, fixed piece is arranged, and the coupling coil can be fixed after adjustment.

[0023] Other features and advantages of the present utility model will be set forth in the following description of the utility model, and, in part, will become apparent to those skilled in the art from the description, or recognized by practicing the utility model as described in the written description and claims. The objects and other advantages of the present utility model will be realized and attained by the structure particularly pointed out in the written description and claims. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0025] Figure 1 The utility model discloses a coupling device installation schematic view in the embodiment shows;

[0026] Figure 2 The utility model discloses an upper bottom plate schematic view in the embodiment shows;

[0027] Figure 3 The utility model discloses a resonator body, fixed adapter piece and signal coupling module connection cutaway schematic view in the embodiment shows;

[0028] Figure 4The utility model discloses a fixed adapter three -dimensional diagram of showing embodiment of the utility model,

[0029] Figure 5 The utility model discloses signal coupling module section view of showing embodiment of the utility model,

[0030] Figure 6 The utility model discloses spiral resonator schematic diagram of showing embodiment of the utility model,

[0031] Figure 7 The utility model discloses shielding shell and copper adapter plate schematic diagram of showing embodiment of the utility model,

[0032] Figure 8 The utility model discloses LC filter circuit principle schematic diagram of showing embodiment of the utility model,

[0033] Figure 9 The utility model discloses main coil and coupling coil positional relationship's structure schematic diagram of showing embodiment of the utility model.

[0034] In the drawing,

[0035] 1, resonator main part;11, upper bottom plate;110, through hole;111, fixed screw hole;12, shell body;13, lower bottom plate;14, counterbore;15, inner hole;2, fixed adapter;21, lower cylinder;210, gap;22, upper cylinder;220, first mounting hole;3, signal coupling module;30, adjusting screw hole;31, through hole;311, first through hole;312, second through hole;32, passageway;4, main coil;41, adapter plate;42, shielding shell;420, plug-in hole;43, connecting counterbore;44, through hole;5, coupling coil;6, tuning circuit board. DETAILED DESCRIPTION

[0036] In order to make the utility model embodiment's purpose, technical scheme and advantage more clear, below will combine the drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly, completely explained, obviously, the described embodiment is the part embodiment of the utility model, instead of all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art obtains without making the creative labor are all within the scope of the utility model protection.

[0037] Reference Figure 1 , Figure 1The utility model discloses a coupling device schematic diagram in the embodiment of the utility model is shown, and the schematic diagram can obviously see that a kind of coupling device applied to spiral resonator, including resonator main body 1, fixed adapter 2 and signal coupling module 3;The resonator main body 1 inside is provided with main coil 4;Signal coupling module 3 is provided with position adjusting structure, tuning circuit board 6 and coupling coil 5;Signal coupling module 3 is fixed on the resonator main body 1 by fixed adapter 2;The position of signal coupling module 3 relative to the resonator main body 1 can be adjusted by adjusting the cooperation of position adjusting structure and fixed adapter 2, and then the relative position between coupling coil 5 and main coil 4 is adjusted (the structure schematic diagram of the position relationship of main coil 4 and coupling coil 5 is shown), to change the output impedance of spiral resonator, this is the mechanical adjustment mode to change the output impedance of spiral resonant cavity;Tuning circuit board 6 includes adjustable capacitor or inductor (not shown in drawing), and adjustable capacitor or inductor and coupling coil 5 are connected in series or parallel for changing the output impedance of spiral resonator, this is the non-mechanical adjustment mode to change the output impedance of spiral resonant cavity.Combination of mechanical adjustment and non-mechanical adjustment (electric signal adjustment) can finally accurately adjust the output impedance of spiral resonant cavity. Figure 9

[0038] The following will be described in detail.

[0039] In the utility model, the resonator main body 1 is in the form of a closed barrel with two ends, wherein the resonator main body 1 comprises a shell body 12, and an upper bottom plate 11 and a lower bottom plate 13 are connected to the upper and lower ends of the shell body 12 respectively to form a closed barrel for accommodating the main coil 4.

[0040] Reference Figure 2 , Figure 2 The utility model discloses a coupling device schematic diagram in the embodiment of the utility model is shown, and the schematic diagram can obviously see that a kind of coupling device applied to spiral resonator, including resonator main body 1, fixed adapter 2 and signal coupling module 3;The resonator main body 1 inside is provided with main coil 4;Signal coupling module 3 is provided with position adjusting structure, tuning circuit board 6 and coupling coil 5;Signal coupling module 3 is fixed on the resonator main body 1 by fixed adapter 2;The position of signal coupling module 3 relative to the resonator main body 1 can be adjusted by adjusting the cooperation of position adjusting structure and fixed adapter 2, and then the relative position between coupling coil 5 and main coil 4 is adjusted (the structure schematic diagram of the position relationship of main coil 4 and coupling coil 5 is shown), to change the output impedance of spiral resonator, this is the mechanical adjustment mode to change the output impedance of spiral resonant cavity;Tuning circuit board 6 includes adjustable capacitor or inductor (not shown in drawing), and adjustable capacitor or inductor and coupling coil 5 are connected in series or parallel for changing the output impedance of spiral resonator, this is the non-mechanical adjustment mode to change the output impedance of spiral resonant cavity.Combination of mechanical adjustment and non-mechanical adjustment (electric signal adjustment) can finally accurately adjust the output impedance of spiral resonant cavity.

[0041] The upper bottom plate 11 and the lower bottom plate 13 are connected by fixed bolts, specifically: a counterbore 14 is arranged at the corner of the upper bottom plate 11, threaded holes adapted to M6 bolts are arranged at the corners of the lower bottom plate 13, and the fixed bolts (the fixed bolts are M6 bolts) pass through the corresponding fixed counterbores 14 and threaded holes from top to bottom in sequence and are fixed by fixed nuts, so that the stability of the entire coupling device is improved.

[0042] Reference Figure 3 And Figure 4 And Figure 5 , Figure 3 ​The utility model discloses a resonator main part 1, fixed adapter 2 and signal coupling module 3 connection cutaway schematic drawing in an embodiment of the utility model is shown, Figure 4 The utility model discloses a fixed adapter 2's three -dimensional schematic diagram in an embodiment of the utility model is shown, Figure 5 The utility model discloses signal coupling module 3 (exemplarily, signal coupling module 3 whole is similar bottle cap state) cutaway view in an embodiment of the utility model is shown, Figure 2 It can be seen from the figure that the resonator main part 1 is coaxially inserted with the fixed adapter 2 at the upper end, 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. The signal coupling module 3 is inserted into the resonator main part 1, the fixed adapter 2 is in a two-section stepped cylindrical shape, 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, and 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.

[0043] The first connecting piece comprises a first screw, a plurality of first mounting holes 220 are formed in the upper cylinder 22, the first screw passes through the first mounting holes 220 and is connected with the first screw holes arranged on the upper bottom plate 11. Generally, there are six first mounting holes 220 arranged in a ring array along the axis of the upper cylinder 22.

[0044] The cylindrical cavity of the fixed adapter 2 is filled with internal threads, and the outer wall of the signal coupling module 3 is provided with external threads engaged with the internal threads.

[0045] The tuning circuit board 6 is arranged in the signal coupling module 3, the coupling coil 5 is welded below the tuning circuit board 6, two through holes 31 (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 from 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 first through hole 311.

[0046] The tuning circuit board 6 mainly comprises an adjustable capacitor or inductor, the adjustable capacitor or inductor 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. The control end of the adjustable capacitor or inductor is led out from the second through hole 312 by 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 mode.

[0047] The principle of changing the output impedance of the spiral resonator in the mechanical adjustment and non-mechanical adjustment mode is given below, that is, the output impedance of the spiral resonator Zout The method of change can be given by the following formula:

[0048]

[0049] in X La , X Lc These are the impedances of the main coil 4 and the coupling coil 5, respectively. k It is the mutual inductance coefficient. Z 0 is the characteristic impedance of the RF input terminal. i It is an imaginary number. From the above formula, we can see that in the mutual inductance coefficient... k RF input characteristic impedance Z 0 and i With the impedance of main coil 4 remaining unchanged, X La and the impedance of the coupling coil 5 X Lc It affects the input impedance Z out The main factor is the mutual inductance between the coupling coil 5 and the main coil 4. Therefore, in mechanical adjustment, by adjusting the distance between the coupling coil 5 and the main coil 4 (this adjustment method is a contact adjustment, that is, by rotation), the mutual inductance between the coupling coil 5 and the main coil 4 changes, that is, the impedance of the main coil 4 changes. X La and the impedance of the coupling coil 5 X Lc The input impedance changes, thus affecting the input impedance. Z out The voltage at the control terminal of the adjustable capacitor or inductor changes when remotely controlled by a level signal in a non-mechanical adjustment manner. Since the adjustable capacitor or inductor is connected in series or parallel with coupling coil 5, the impedance of coupling coil 5 changes. X Lc Changes can also affect the input impedance. Z out The change can be observed through the output impedance of the spiral resonator. Z out This allows for precise adjustment of impedance matching through control. Both methods can be chosen arbitrarily, are convenient to use, and can be used in combination to significantly enhance adjustment accuracy, overcoming the shortcomings of traditional solutions.

[0050] The coupling distance between the coupling coil 5 and the main coil 4 is adjusted by the threaded engagement between the signal coupling module 3 and the fixed adapter 2.

[0051] The inner wall of the signal coupling module 3 is provided with a channel 32, and the transverse section of the channel 32 is 2mm in diameter and 24mm in depth, and the longitudinal section of the channel 32 is in inverted L shape, the ground wire of the coupling coil 5 is led out to the ground through the channel 32, and the adjusting part is radially inserted into the channel 32 from the outside to the ground wire.

[0052] The adjusting part comprises 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 in the radial direction, the adjusting screw hole 30 is communicated with the channel 32, the adjusting screw hole 30 is threadedly engaged with the adjusting screw, and the adjusting screw is in pressing fit with the ground wire.

[0053] The fixing adapter 2 is provided with a notch 210 on the outer cylinder wall, and the fixing part is radially inserted into the notch 210 from the outside of the signal coupling module 3 through the upper bottom plate 11 and is in pressing fit with the outer cylinder wall of the fixing adapter 2.

[0054] The fixing part comprises a fixing screw, the lower cylinder 21 is uniformly provided with a plurality of notches 210 on the outer cylinder wall, and the side wall of the upper bottom plate 11 is provided with a fixing screw hole 111; the fixing screw is engaged with the fixing screw hole 111, and the fixing screw is in pressing fit with the outer cylinder wall of the lower cylinder 21; and the inner cylinder wall of the lower cylinder 21 is in pressing fit with the signal coupling module 3, so that the signal coupling module 3 is stabilized.

[0055] In the utility model, the fixing adapter 2 is not necessarily an independent device, but also can be a fixing part on the resonator main body 1, for example, the upper cylinder 22 of the fixing adapter 2 in the fixed adapter 2 is integrally formed with the corresponding upper bottom plate 11, and the lower cylinder 21 of the fixing adapter 2 is not integrally formed with the corresponding upper bottom plate 11, but is closely attached to the through hole 110. Figure 3 Or the fixing adapter 2 is a thread or a slot provided on the resonator main body 1, and the function is to fix the signal coupling module 3 and realize position adjustment, for example, the fixing adapter 2 is a slot integrally formed with the through hole 110 of the fixing adapter 2, or the fixing adapter 2 is a thread provided on the inner wall of the through hole 110.

[0056] The utility model breaks the conventional of unable to adjust of coupling device in prior art, through setting up signal coupling module 3 and fixed adapter 2, wherein, signal coupling module 3 is equipped with coupling coil 5, and the height of coupling coil 5 can be continuously adjusted through the thread engagement between signal coupling module 3 and fixed adapter 2, the defect that the originally resonator functionality is relatively single is improved, and adjustment is simple, further, the adjusting part is considerately matched, so that the height of coupling coil 5 can be continuously adjusted, and the ground wire can be adjusted adaptively, to avoid the accumulation caused by too much ground wire and the dragging caused by too little ground wire, further, in order to avoid unnecessary shaking or deviation of coupling coil 5 after adjustment, the fixing part is arranged, and the fixing part is loosened with coupling coil 5 during adjustment, and coupling coil 5 is fixed after adjustment.

[0057] In the utility model, the signal is inputted into the ion trap through the vacuum feedthrough adapter at the lower end of the resonator main body 1, and the adapter plate 41 is arranged on the outer wall of the resonator main body 1, the shielding shell 42 is installed on the adapter plate 41, the LC filter circuit is arranged on the shielding shell 42, the through-hole capacitor is connected, the main body of the through-hole capacitor is a screw, and the through-hole capacitor is screwed (i.e. installed) on the threaded hole of the adapter plate 41.

[0058] Reference Figure 6 And Figure 7 , Figure 6 The utility model discloses a spiral resonator schematic diagram; Figure 7 The utility model discloses a shielding shell 42 and copper adapter plate schematic diagram; Figure 5 As can be clearly seen in the utility model, the spiral resonator comprises the adapter plate 41, the adapter plate 41 is a copper adapter plate, the connecting counterbores 43 are arranged on the shielding shell 42 and the copper adapter plate, the connecting bolts pass through the second counterbores, the second counterbores are Φ3, there are four, and 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 the plug-in 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-in hole 420, and the shielding shell 42 is also provided with the perforation 44, another SMA connector is installed in the perforation 44, and the SMA connector is welded with the circuit board of the LC filter circuit after passing through the perforation 44.

[0059] The existing RC filter circuit has large power loss due to the existence of resistance, which reduces the overall Q value of the system, and reference Figure 8 , Figure 8The schematic diagram of the LC filter circuit principle in the embodiment of the utility model is shown, it can be obviously seen in the schematic diagram, in fact, the LC filter circuit for providing DC voltage, its essence is a four order Butterworth filter circuit, namely the circuit includes mutually parallel capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7 and capacitor C8, wherein C1 and C2 between, C3 and C4 between, C5 and C6 between and C7 and C8 between respectively connect inductance L2, inductance L3, inductance L4 and inductance L5, bias voltage is input from VIN (as one end of C1), after filtering circuit from VOUT1 (as one end of C8) output enters the through-hole capacitor, wherein, the circuit board of LC filter circuit is provided with a pad with 2mm aperture, one end of the through-hole capacitor end passes through the plug-in hole 420 of shielding shell 42 and is welded with the pad on the circuit board to form electrical connection, finally connects with VOUT1, the other end of the through-hole capacitor end is connected with the main coil 4.Capacitors in the circuit use high Q value low temperature drift capacitors, inductance uses high shielding winding inductance, greatly reduces the loss generated by traditional RC filter circuit, and a through-hole capacitor is used to access the main coil 4 in the filter output.

[0060] In addition, with reference to Figure 6 In order to sample the radio frequency signal input into the ion trap, the inner hole 15 matched with a connector is reserved on the shell body 12. The radio frequency signal sampling can be performed by using the capacitive voltage division, and the high Q value voltage division capacitor is welded on the circuit board of the ceramic substrate and can be connected with the sampling coil led out by the main coil in the shell body 12, and the sampling signal is output through the SMA connector, so that the subsequent processing or monitoring of the signal is facilitated.

[0061] Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it still can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and these modifications or replacements 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 utility model.

Claims

1. A coupling device for application to a spiral resonator, characterized by The resonator comprises a fixed adapter (2), a signal coupling module (3) and a main coil (4) arranged inside a resonator body (1); The signal coupling module (3) is provided with a position adjusting structure, a tuning circuit board (6) and a coupling coil (5), and the coupling coil (5) is connected to the tuning circuit board (6); The signal coupling module (3) is connected to the resonator body (1) through the fixed adapter (2), and the position of the signal coupling module (3) relative to the resonator body (1) can be adjusted through the cooperation of the position adjusting structure and the fixed adapter (2).

2. The coupling device for a spiral resonator according to claim 1, wherein The resonator body (1) is coaxially inserted with the fixed adapter (2) at the upper end, 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), the signal coupling module (3) is inserted into the resonator body (1), the tuning circuit board (6) is arranged in the signal coupling module (3), and the relative position between the coupling coil (5) and the main coil (4) is adjusted through the thread engagement between the position adjusting structure and the fixed adapter (2).

3. The coupling device for a spiral resonator according to claim 1, wherein 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 of the channel (32) and grounded, and is further matched with an adjusting member which is inserted into the channel (32) from the outside and is in abutting engagement with the ground wire.

4. The coupling device for a spiral resonator according to claim 1, wherein The resonator body (1) comprises an outer shell body (12), the upper and lower ends of the outer shell body (12) are respectively connected with an upper bottom plate (11) and a lower bottom plate (13), forming a closed barrel for arranging the main coil (4); A through hole (110) is vertically formed in the upper bottom plate (11), the fixed adapter (2) is coaxially inserted into the through hole (110), and an adapter hole is formed in the lower bottom plate (13) for mounting a vacuum feedthrough adapter; The upper bottom plate (11) and the lower bottom plate (13) are connected by fixing bolts.

5. The coupling device for a spiral resonator according to claim 3, wherein The fixed adapter (2) is a two-section 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), the upper end surface of the upper cylinder (22) is abutted with the upper surface of the upper bottom plate (11), and is fixed by a first connecting member; The inner cavity of the fixed adapter (2) is filled with internal threads, and the position adjusting structure is external threads arranged on the outer wall of the signal coupling module (3) and engaged with the external threads.

6. The coupling device for a spiral resonator according to claim 5, wherein A plurality of notches (210) are uniformly formed in the side wall of the lower cylinder (21), a fixing screw hole (111) is formed in the side wall of the upper bottom plate (11), a fixing member is engaged with the fixing screw hole (111), and the fixing member is in abutting engagement with the outer side wall of the lower cylinder (21), and the inner side wall of the lower cylinder (21) is in abutting engagement with the signal coupling module (3).

7. A coupling device for application to a spiral resonator according to any one of claims 1 to 6, characterized in that, The signal coupling module (3) is provided with a through hole (31) at the top, a connector on the tuning circuit board (6) is led out from the through hole (31), the input radio frequency signal directly acts on the coupling coil (5) through the connector of one of the through holes (31), and the control end of the adjustable capacitor or inductor is led out from another through hole (31) through another connector, wherein the connector is an SMA connector.

8. A coupling device for application to a spiral resonator according to any one of claims 1 to 6, characterized in that, The lower end of the resonator main body (1) is connected to the signal input ion trap through a vacuum feedthrough adapter, and an adapter plate (41) is arranged on the outer wall of the resonator main body (1) for leading in or leading out the signal of the main coil (4), a shielding shell (42) is mounted on the adapter plate (41), and the shielding shell (42) is provided with an LC filter circuit.

9. A coupling device for application to a spiral resonator according to any one of claims 1 to 6, characterized in that, The tuning circuit board (6) is provided with an adjustable capacitor or inductor, and the adjustable capacitor or inductor is connected in series or parallel with the coupling coil (5).

10. The coupling device for a spiral resonator according to claim 8, wherein The adapter plate (41) is a copper adapter plate, the shielding shell (42) and the copper adapter plate are both provided with a connecting counter bore (43), and a connecting bolt passes through the connecting counter bore (43) to be fixed with the connecting threaded hole of the resonator main body (1).

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