High-frequency radio-frequency leakage prevention coaxial shunt and current detection system

Abstract

The invention provides a coaxial shunt capable of preventing high-frequency radio frequency leakage, which comprises an outer conductor, a resistor body and a central shaft conductor, the central shaft conductor and the outer conductor are respectively provided with a central shaft conductor signal output end and an outer conductor signal output end, and a low-pass filtering module is arranged in a cylindrical structure of the resistor body. And the low-pass filtering module is electrically connected with the central shaft conductor signal output end and the outer conductor signal output end. According to the coaxial shunt capable of preventing high-frequency and radio-frequency leakage provided by the invention, the low-pass filtering module is arranged between the signal output end of the central shaft conductor and the signal output end of the outer conductor, so that leaked high-frequency and radio-frequency signals can be filtered, and the detection bandwidth of the coaxial shunt capable of preventing high-frequency and radio-frequency leakage is effectively increased; and the space is saved. The invention also provides a current detection system.

Description

[Technical field]

[0001] The invention relates to the technical field of electronic circuit detection, and in particular to a high-frequency radio frequency leakage prevention coaxial shunt and a current detection system. [Background technology]

[0002] In the field of electronic measurement, it is often necessary to measure high-frequency (above 100MHz) current waveforms. In order to reduce the parasitic inductance of the shunt, the industry generally uses coaxial shunts to detect high-frequency currents. Figure 1 The figure shows the existing coaxial shunt. The coaxial shunt is provided with an outer conductor, a resistor and a central axis conductor, so that the high-frequency current flows coaxially in opposite directions through the central axis conductor, the resistor and the outer conductor, and the magnetic fields formed by the high-frequency current on the central axis conductor and the outer conductor cancel each other, thereby reducing the measurement of the high-frequency current.

[0003] However, during the manufacturing process of the coaxial shunt in the prior art, due to the influence of the production process and mechanical characteristics, the coaxial shunt will experience a "signal leakage" phenomenon when transmitting high-frequency RF signals. The specific manifestation of this phenomenon is that the resistance value Rs of the resistor will change significantly.

[0004] See also Figure 2 and Figure 3 , Figure 2 is a topological diagram of the coaxial splitter in the prior art during use, Figure 3 It is a frequency characteristic waveform diagram of the coaxial shunt test in the prior art. The signal source provides an input signal U1, and the detection device detects the voltage signal U2 across the resistor. A voltage divider impedance R is set between the signal source and the coaxial shunt. Among them, U1 / (R+Rs)=I, U2=I·Rs. The resistance value Rs of the resistor impedance is generally between 0.1 ohms and 0.001 ohms, and the resistance value of the voltage divider impedance R is generally 50 ohms, which is much larger than the resistance value Rs of the resistor impedance. Therefore, U2=U1·Rs / R. Under normal circumstances, based on Ohm's law, the resistance value RS of the resistor impedance remains unchanged, but as the frequency of the input signal U1 provided by the signal source continues to increase, "signal leakage" occurs, and the input signal U1 is directly transmitted to the two ends of the detection circuit, resulting in the detection of the voltage signal U2 increasing, but the resistance value RS of the resistor impedance has not changed.

[0005] Specifically, the frequency f of the high-frequency current signal input to the input end of the coaxial shunt increases from 0HZ. In the initial stage, since the frequency f is small and there is no leakage, the coaxial shunt can be used normally and the resistance Rs of the resistor remains unchanged. When the frequency f reaches a certain value, the coaxial shunt detection has an error, and the resistance Rs of the resistor corresponding to the detected signal begins to increase. When the resistance Rs of the resistor changes by more than 3dB, the first frequency f1 of the frequency f is obtained. If the frequency continues to increase, the error is too large and the coaxial shunt cannot be used normally. Under normal circumstances, the resistor is not damaged, and the detected resistance Rs of the resistor should remain unchanged. It is precisely because of the signal leakage phenomenon that the detection error occurs, which causes the change of the resistance Rs of the resistor.

[0006] The existing technology mainly focuses on continuously improving the production and processing technology, or improving the manufacturing materials, but the improvement is limited. The bandwidth that the coaxial shunt can detect is still relatively narrow, and it is difficult to use it in the high-frequency RF circuit with a frequency f exceeding 1GHZ. [Summary of the invention]

[0007] The present invention provides a high-frequency radio frequency leakage-proof coaxial shunt and a current detection system for solving the above-mentioned problems of narrow bandwidth and large error, so as to increase the detection bandwidth and improve the accuracy of the detection result.

[0008] A coaxial shunt for preventing high-frequency radio frequency leakage comprises an outer conductor, a resistor and a central axis conductor, wherein a receiving cavity is provided inside the outer conductor; the resistor is accommodated in the receiving cavity; the outer conductor, the resistor and the central axis conductor are all cylindrical structures, coaxially arranged from the outside to the inside, the central axis conductor passes through the outer conductor, and two ends of the resistor are electrically connected to the outer conductor and the central axis conductor respectively; the central axis conductor and the outer conductor are respectively provided with a central axis conductor signal output end and an outer conductor signal output end, and a low-pass filtering module is provided between the central axis conductor signal output end and the outer conductor signal output end for filtering high-frequency radio frequency signals.

[0009] A current detection system includes a detection device and a coaxial shunt for preventing high-frequency radio frequency leakage. The coaxial shunt for preventing high-frequency radio frequency leakage includes an outer conductor, a resistor and a central axis conductor. A receiving cavity is provided inside the outer conductor; the resistor is accommodated in the receiving cavity; the outer conductor, the resistor and the central axis conductor are all cylindrical structures, coaxially arranged from the outside to the inside, the central axis conductor passes through the outer conductor, and the two ends of the resistor are electrically connected to the outer conductor and the central axis conductor respectively; the central axis conductor and the outer conductor are respectively provided with a central axis conductor signal output end and an outer conductor signal output end, and a low-pass filtering module is provided between the central axis conductor signal output end and the outer conductor signal output end for filtering high-frequency radio frequency signals; the detection device is electrically connected to the outer conductor and the central axis conductor, and is used to detect the high-frequency current signal flowing through the outer conductor, the resistor and the central axis conductor.

[0010] Compared with the prior art, the high-frequency RF leakage prevention coaxial shunt provided by the present invention can filter the leaked high-frequency RF signal by setting the low-pass filtering module between the signal output end of the central axis conductor and the signal output end of the outer conductor, thereby effectively increasing the detection bandwidth of the high-frequency RF leakage prevention coaxial shunt, that is, compared with the case where the low-pass filtering module is not set, the high-frequency RF leakage prevention coaxial shunt has a lower detection bandwidth when the frequency f is less than the first frequency f max In the high-frequency radio frequency circuit, the resistance value Rs of the resistor remains substantially unchanged and does not fluctuate; when the frequency f is greater than the first frequency f max In the high-frequency RF circuit, the resistance Rs of the resistor will not fluctuate too much, the detection accuracy of the anti-high-frequency RF leakage coaxial shunt can be effectively improved, and the detection bandwidth can be increased simultaneously, and it can be used in high-frequency RF circuits with higher frequencies.

Brief Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0012] Figure 1 is a cross-sectional view of the coaxial splitter in the prior art;

[0013] Figure 2 The coaxial shunt detection circuit connection topology diagram in the prior art;

[0014] Figure 3 It is a frequency characteristic waveform diagram of the coaxial shunt test in the prior art;

[0015] Figure 4 is a structural block diagram of the current detection system provided by the present invention;

[0016] Figure 5 is a cross-sectional view of a first embodiment of the coaxial shunt for preventing high-frequency RF leakage provided by the present invention;

[0017] Figure 6 yes Figure 5 The topological diagram of the low-pass filtering module shown;

[0018] Figure 7 is a cross-sectional view of a second embodiment of the coaxial shunt for preventing high-frequency RF leakage provided by the present invention;

[0019] Figure 8 yes Figure 7 The low-pass filtering module topology diagram shown;

[0020] Fig. 9 It is the topological diagram of the low-pass filtering module shown in the third embodiment of the coaxial shunt for preventing high-frequency RF leakage provided by the present invention;

[0021] Fig.10 It is the topological diagram of the low-pass filtering module shown in the fourth embodiment of the coaxial shunt for preventing high-frequency RF leakage provided by the present invention;

[0022] Fig.11 It is the topological diagram of the low-pass filtering module shown in the fifth embodiment of the coaxial shunt for preventing high-frequency RF leakage provided by the present invention;

[0023] Fig.12 It is the topological diagram of the low-pass filtering module shown in the sixth embodiment of the coaxial shunt for preventing high-frequency RF leakage provided by the present invention;

[0024] Fig.13 is a frequency characteristic waveform diagram of the low-pass filtering module provided by the present invention; and

[0025] Fig.14 It is a frequency characteristic waveform diagram of the high-frequency radio frequency leakage prevention coaxial shunt provided by the present invention. [Specific implementation method]

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Please refer to Figure 4 , Figure 5 and Figure 6 , Figure 4 is a structural block diagram of the current detection system 100 provided by the present invention, Figure 5 is a cross-sectional view of a first embodiment of the high-frequency RF leakage prevention coaxial shunt 10 provided by the present invention, Figure 6 yes Figure 5 The topology diagram of the low-pass filter module 7 is shown. The current detection system 100 includes 30 and a coaxial shunt 10 to prevent high-frequency RF leakage. It should be noted that the specific circuit structure of the detection device 30 is not limited here. The detection device 30 cooperates with the coaxial shunt 10 to prevent high-frequency RF leakage and can be used in high-frequency RF circuits to achieve accurate detection of high-frequency RF current signals.

[0032] The high-frequency RF leakage prevention coaxial shunt 10 comprises an outer conductor 1, a resistor 3 and a central axis conductor 5. The outer conductor 1 is provided with a housing cavity 101 inside, and the resistor 3 is accommodated in the housing cavity 101. The outer conductor 1, the resistor 3 and the central axis conductor 5 are all cylindrical structures, and are coaxially arranged from the outside to the inside. The central axis conductor 5 penetrates the outer conductor 1, and the two ends of the resistor 3 are electrically connected to the outer conductor 1 and the central axis conductor 5 respectively.

[0033] With the resistor 3 as the boundary, the central axis conductor 5 and the outer conductor 1 are divided into a central axis conductor signal input end 501, an outer conductor signal input end 11, a central axis conductor signal output end 53, and an outer conductor signal output end 13 on both sides of the resistor 3. A high-frequency radio frequency signal source I is connected to the central axis conductor signal input end 501 and the outer conductor signal input end 11. A low-pass filter module 7 is provided in the cylindrical structure of the resistor 3. The low-pass filter module 7 is electrically connected to the central axis conductor signal output end 503 and the outer conductor signal output end 13 for filtering high-frequency radio frequency signals. The detection device 30 is electrically connected to the outer conductor 1 and the central axis conductor 5 for detecting the high-frequency current signal I flowing through the outer conductor 1, the resistor 3 and the central axis conductor 5. The detection device 30 is mainly connected to the central axis conductor signal output end 503 and the outer conductor signal output end 13. Due to the presence of the low-pass filter module 7, the detection error of the detection device 30 can be effectively reduced.

[0034] In this embodiment, the resistor 3 and the central axis conductor 5 are arranged in the accommodating cavity 101 formed by the outer conductor 1. Since the resistor 3 is also a cylindrical structure with a hollow interior, the low-pass filter module 7 is arranged in the cylindrical structure of the resistor 3 and close to the central axis conductor signal output end 503 and the outer conductor signal output end 13. This arrangement not only facilitates the connection of the low-pass filter module 7 to the central axis conductor 5 and the outer conductor 1, but also saves space. Without increasing the volume of the high-frequency RF leakage prevention coaxial shunt 10, the low-pass filter module 7 is avoided from being arranged outside the high-frequency RF leakage prevention coaxial shunt 10.

[0035] In addition, since different frequency characteristics of the anti-high-frequency RF leakage coaxial shunts 10 are different and the signal leakage problems are different, it is impossible to produce a unified low-pass filter module 7 for connection and adaptation. The anti-high-frequency RF leakage coaxial shunt 10 will set the low-pass filter module 7 according to the specific situation and install it in the accommodating cavity 101 in advance. The user does not need to make installation selections or purchase precision debugging instruments for adjustment. It is more convenient to use and less prone to errors. The anti-high-frequency RF leakage coaxial shunt 10 integrates the low-pass filter module 7 with the outer conductor 1, the resistor 3 and the center axis conductor 5, so as to achieve precise adjustment of the frequency characteristics of the anti-high-frequency RF leakage coaxial shunt 10 without changing the overall structural length or volume.

[0036] In order to filter the leaked high-frequency radio frequency signal, the low-pass filter module 7 can be a passive first-order low-pass filter, a second-order low-pass filter or a third-order low-pass filter, which can be selected according to specific needs. In this embodiment, a first-order low-pass filter is selected, which has a simple structure, is easy to set up and has a low cost. Of course, in another embodiment, a second-order low-pass filter, a third-order low-pass filter or other multi-order low-pass filters can also be selected.

[0037] The low-pass filter module 7 includes a first capacitor C1, and both ends of the first capacitor C1 are electrically connected to the central axis conductor signal output end 503 and the outer conductor signal output end 13. By setting the first capacitor C1, the leaked high-frequency radio frequency signal can be effectively filtered, and the corresponding principle is described as follows:

[0038] Since the outer conductor 1 is grounded, the first capacitor C1 is equivalent to the first end point A being grounded, and the other end point B is connected to the center axis conductor 5. The current signal normally flowing through the center axis conductor 5 will not be affected by the first capacitor C1. When there is a leaked high-frequency RF signal flowing to the signal output end 503 of the center axis conductor, the first capacitor C1 has the characteristic of "passing AC" and will transmit the leaked high-frequency RF signal to the outer conductor 1, that is, to the grounding point, which will not affect the detection result of the detection equipment 30.

[0039] In addition, the low-pass filter module 7 adopts a solution of a single first capacitor C1, and the overall circuit structure is simple, easy to produce and process, and has low cost.

[0040] Please continue reading Figure 7 and Figure 8 , Figure 7 is a cross-sectional view of a second embodiment of the high-frequency RF leakage prevention coaxial shunt 10 provided by the present invention, Figure 8 yes Figure 7The topological diagram of the low-pass filter module 7 is shown in FIG. The central axis conductor 5 includes a first rod 51 and a second rod 53, wherein the first rod 51 penetrates the outer conductor 1 and the resistor 3 and is electrically connected to the outer conductor 1 and the resistor 3, and the second rod 53 is coaxially arranged relative to the first rod 51. In this embodiment, the central axis conductor 5 is divided into two, and the low-pass filter module 7 is electrically connected to the first rod 51, the second rod 53 and the outer conductor 1 respectively. The arrangement of the central axis conductor 5 divided into two can enrich the arrangement of the low-pass filter module 7 and provide more diverse options. At the same time, it is more convenient to produce and install the central axis conductor 5 and the low-pass filter module 7, and when the low-pass filter module 7 needs to be replaced and adjusted, the first rod 51 and the second rod 53 can be separated separately for re-arrangement, which is more convenient.

[0041] In order to further strengthen the filtering process of the leaked high-frequency radio frequency signal, the low-pass filter module 7 uses a second-order low-pass filter structure, including an inductor L and a second capacitor C2. The inductor L is arranged between the first rod 51 and the second rod 53, one end of the second capacitor C2 is electrically connected to the outer conductor 1, and the other end of the second capacitor C2 is arranged between the inductor L and the second rod 53. Among them, the end point C and the end point D of the inductor L are respectively connected to the first rod 51 and the second rod 53, the end point E of the second capacitor C2 is connected to the outer conductor 1, which is equivalent to grounding, and the end point F of the second capacitor C2 is connected to the end point D.

[0042] Compared with the first embodiment, the difference of the second embodiment is that the inductor L is added, and the inductor L is set at the output end of the central axis conductor 5. The "AC resistance" characteristic of the inductor L is used to cooperate with the second capacitor C2 to achieve step-by-step processing of the leaked high-frequency radio frequency signal, further avoiding the impact on the detection result of the detection device 30. The connection method of setting the inductor L and the second capacitor C2 is also relatively simple as a whole, and the central axis conductor 5 is divided into the first rod 51 and the second rod 53, which is convenient for installation and can effectively process the leaked high-frequency radio frequency signal.

[0043] Please continue reading Fig. 9 , Fig. 9 This is the topology diagram of the low-pass filter module 7 shown in the third embodiment of the anti-high-frequency RF leakage coaxial shunt 10 provided by the present invention. The difference between the third embodiment and the second embodiment is that the inductor L is replaced by the resistor R1, which is used to cooperate with the second capacitor C2 to realize step-by-step processing of the leaked high-frequency RF signal, further avoiding the influence on the detection result of the detection device 30.

[0044] Please continue reading Fig.10 and Fig.11 , are respectively the topological diagrams of the low-pass filter module 7 shown in the fourth embodiment and the fifth embodiment of the coaxial shunt 10 for preventing high-frequency RF leakage provided by the present invention. In the fourth embodiment and the fifth embodiment, two or more low-pass filter modules 7 are arranged between the first rod 51, the second rod 53 and the outer conductor 1, each of the inductors L or the resistors R1 is connected in series between the first rod 51 and the second rod 53, the number of the second capacitors C2 corresponds to the number of the inductors L or the resistors R1, and each of the second capacitors C2 is connected in parallel between the inductors L or the resistors R1 and the outer conductor 1 relative to the inductors L or the resistors R1. By setting up multiple layers of low-pass filtering, the leaked high-frequency RF signal can be processed more efficiently, and the error can be further reduced, thereby increasing the detection bandwidth of the coaxial shunt 10 for preventing high-frequency RF leakage.

[0045] Please continue reading Fig.12 , Fig.12 It is a topological diagram of the low-pass filter module 7 shown in the sixth embodiment of the anti-high-frequency RF leakage coaxial shunt 10 provided by the present invention. The low-pass filter module 7 includes a low-pass filter chip, preferably a LFCN-1200+ low-pass filter chip. The endpoints G, H, and K of the low-pass filter module 7 are respectively connected to the first rod 51, the second rod 53 and the outer conductor 1. By directly selecting the existing low-pass filter chip, it can be directly arranged in the accommodating cavity 101 without the need to additionally set the inductor L and the second capacitor C2, which makes the connection more convenient and the integration is high.

[0046] Please combine Fig.13 and Fig.14 , Fig.13 is a frequency characteristic waveform diagram of the low-pass filtering module 7 provided by the present invention, Fig.14 It is a frequency characteristic waveform diagram of the anti-high-frequency RF leakage coaxial shunt 10 provided by the present invention. When the low-pass filter module 7 is connected to the anti-high-frequency RF leakage coaxial shunt 10, the gain G shows a certain regularity as the frequency f changes. In the initial stage, the gain G remains unchanged and is maintained within the range of ±3dB; as the frequency f continues to increase and reaches the first frequency f1, the gain G begins to decrease by more than 3dB.

[0047] During the operation of the current detection system 100 using the anti-high-frequency RF leakage coaxial shunt 10, the presence of the low-pass filter module 7 will directly affect the waveform of the resistor body resistance Rs detection result as the frequency f changes. In the initial stage, the resistor body resistance Rs remains unchanged, and due to the presence of the low-pass filter module 7, the resistor body resistance Rs will not fluctuate and remain within the range of ±3dB; as the frequency f continues to increase and reaches the first frequency f1, the low-pass filter module 7 filters out the leaked high-frequency RF signal, so that the resistor body resistance Rs remains within the range of ±3dB; because the filtering capacity of the low-pass filter module 7 has a certain limit, the resistor body resistance Rs will not change significantly until the frequency f increases to the second frequency f2. Through the use of the low-pass filter module 7, the second frequency f2 can basically reach 2GHz, while the first frequency f1 is generally 1GHz. The low-pass filtering module 7 of the anti-high-frequency RF leakage coaxial shunt 10 significantly increases the detection bandwidth, and can be used for high-frequency RF circuits with frequencies between the first frequency f1 and the second frequency f2. The scope of application is wider, and the detection accuracy of the anti-high-frequency RF leakage coaxial shunt 10 is improved.

[0048] Compared with the prior art, the anti-high-frequency RF leakage coaxial shunt 10 provided by the present invention does not increase the length or volume while effectively increasing the bandwidth, and is simple, compact and easy to use. By setting the low-pass filter module 7 in an integrated manner, the user's preparation work is saved, and there is no need to additionally adjust the frequency characteristics of the anti-high-frequency RF leakage coaxial shunt 10. If the low-pass filter module 7 is external, it is not only inconvenient for customers to install and use, but also increases the volume. At the same time, since the anti-high-frequency RF leakage coaxial shunt 10 corresponds to the low-pass filter module 7 one-to-one, they must be carefully paired and cannot be mixed during production and use, and it is difficult for ordinary users to achieve adjustment, and it needs to be processed with precision instruments, which is prone to errors. Therefore, the anti-high-frequency RF leakage coaxial shunt 10 will greatly reduce the user's operating difficulty and is more convenient to use.

[0049] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A coaxial shunt for preventing high-frequency radio frequency leakage, comprising: An outer conductor, wherein a receiving cavity is provided inside the outer conductor; A resistor, the resistor being received in the accommodating cavity; and The central axis conductor, the outer conductor, the resistor and the central axis conductor are all cylindrical structures, coaxially arranged from the outside to the inside, the central axis conductor penetrates the outer conductor, and the two ends of the resistor are electrically connected to the outer conductor and the central axis conductor respectively; It is characterized in that the central axis conductor and the outer conductor are respectively provided with a central axis conductor signal output end and an outer conductor signal output end, and a low-pass filter module is provided in the cylindrical structure of the resistor body, and the low-pass filter module is electrically connected to the central axis conductor signal output end and the outer conductor signal output end.

2. The high-frequency RF leakage prevention coaxial shunt according to claim 1, characterized in that: The low-pass filter module is a passive first-order low-pass filter, a second-order low-pass filter or a third-order low-pass filter.

3. The high frequency RF leakage preventing coaxial shunt according to claim 2, characterized in that: The low-pass filter module includes a first capacitor, and two ends of the first capacitor are electrically connected to the central axis conductor signal output end and the outer conductor signal output end respectively.

4. The high-frequency RF leakage preventing coaxial shunt according to claim 2, characterized in that: The central axis conductor comprises: a first rod, the first rod passing through the outer conductor and the resistor and being electrically connected to the outer conductor and the resistor; and A second rod, wherein the second rod is coaxially arranged relative to the first rod.

5. The high frequency radio frequency leakage preventing coaxial shunt according to claim 4, characterized in that: The low-pass filter module is electrically connected to the first rod, the second rod and the outer conductor respectively.

6. The coaxial shunt for preventing high-frequency radio frequency leakage according to claim 5, characterized in that: The low-pass filtering module comprises: an inductor or a resistor, wherein the inductor or the resistor is disposed between the first rod and the second rod; and A second capacitor, one end of which is electrically connected to the outer conductor, and the other end of which is arranged between the inductor or the resistor and the second rod.

7. The coaxial shunt for preventing high-frequency radio frequency leakage according to claim 6, characterized in that: Two or more of the inductors or resistors and the second capacitors are arranged between the first rod, the second rod and the outer conductor, each of the inductors or resistors is connected in series between the first rod and the second rod, the number of the second capacitors corresponds to the inductors, and each of the second capacitors is connected in parallel between the inductors and the outer conductor relative to the inductors.

8. The coaxial shunt for preventing high-frequency radio frequency leakage according to claim 5, characterized in that: The low-pass filter module includes a low-pass filter chip, and LFCN-1200+ is selected.

9. A current detection system, characterized in that: include: Testing equipment; and According to the high-frequency RF leakage protection coaxial shunt as described in any one of claims 1 to 8, the detection device is electrically connected to the outer conductor and the center axis conductor, and is used to detect the high-frequency current signal flowing through the outer conductor, the resistor and the center axis conductor.

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