A kind of AC / DC difference calculation resistor that simulates AC quantum resistance

Abstract

The invention discloses an AC / DC difference calculable resistor simulating an AC quantum resistor, which is beneficial to solving the problems of complex structure and difficult calculation of a high-resistance AC / DC difference calculable resistor, can be used to verify the uncertainty of a four-terminal quantum resistance transfer bridge in a working state, and can also be used to verify the AC quantum Hall effect, so as to realize the mutual verification of traditional classical methods and cutting-edge technologies. The invention is characterized in that a small-sized resistor is arranged at the center of the axis of a middle cavity of a copper metal cylinder, the resistance is 12906Ω, the time constant is ≤2ns, and the axial length is 0.5% to 1.5% of the length of the middle cavity; the left end face of the small-sized resistor is connected to a left-end copper wire, the left-end copper wire passes through an epoxy resin copper-clad plate at the left end of the middle cavity to form a left-end connector in the left cavity, and the right end face is connected to a right-end copper wire, the right-end copper wire passes through an epoxy resin copper-clad plate at the right end of the middle cavity to form a right-end connector in the right cavity of the copper metal cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of AC / DC difference calculable resistors, in particular to an AC / DC difference calculable resistor for simulating AC quantum resistors. Background Art

[0002] In 2019, the International System of Units (SI) will be reformed, and all seven basic units will be defined using physical constants. The definition and traceability of measurement units will enter the era of constantization and quantization. Figure 1 This is a schematic diagram of the quantized Hall effect. The quantized Hall effect realizes that the DC resistance unit is defined by basic physical constants, such as Figure 1 As shown, the resistance R at the quantum platform H =h / ie 2 , the DC resistance can be traced back to Planck's constant h and the electron charge e, with an uncertainty of up to 10 -9 The AC quantized Hall effect is to pass an AC current through a quantized Hall sample to obtain the value of the AC resistance, and then use the bridge method to transfer it to the AC resistance, capacitance and inductance, so that the impedance unit can be traced back to the basic physical constants.

[0003] The four-terminal AC quantum resistance transfer bridge meets the definition of impedance. Through the Wagner branch, Kelvin branch, source combination network and differential injection network, the uncertainty introduced by the measurement link is greatly reduced, and the 10 -8 The transfer of quantum resistance of AC, such as Figure 2 As shown, Figure 2 It is a schematic diagram of the AC quantum resistance transfer bridge structure.

[0004] AC quantum resistance was originally realized by passing AC through a conventional quantized Hall resistance sample. Due to the influence of the distribution parameters, its quantum platform is parabolic, and the resistance at the center of the magnetic field increases linearly with the frequency. The measurement uncertainty is large, and the development of high-precision AC quantum resistance samples is still an international problem. Due to the limitations of AC quantum resistance samples, it is impossible to calibrate the four-terminal AC quantum resistance transfer bridge in the working state. Figure 3 This is a schematic diagram of the frequency characteristics of the AC quantized Hall effect on a conventional sample. Figure 3 As shown, the AC quantum resistance changes in a three-dimensional saddle shape, and the distribution parameters change with the frequency f.

[0005] Figure 4This is a schematic diagram of the shielding structure of the AC quantized Hall resistance sample. The AC / DC differential calculable resistor has a regular geometric shape and is a classic AC resistance benchmark. It is divided into coaxial type, four-loop type and eight-loop type. The parasitic inductance and parasitic capacitance as well as various additional losses can be calculated, and then the difference between the AC resistance value and the DC resistance can be accurately calculated. Its DC value can be measured by the DC quantized Hall resistance standard. Therefore, the development of the AC / DC differential calculable resistor can simulate the AC quantum resistance and realize the proportional error of the four-terminal quantum resistance transfer bridge under working conditions. It is also one of the means to verify the uncertainty of the AC quantum Hall effect and realize the mutual verification of traditional classical methods and cutting-edge technologies.

[0006] Figure 5 This is a schematic diagram of the structure of an eight-loop AC / DC differential calculable resistor. The conventional AC / DC differential calculable resistor has a resistance value of 1kΩ or 100Ω, but the commonly used resistance value of a quantum resistor is 12906.4037Ω. Since the current maximum resistivity of the resistor wire is approximately 3.8kΩ / m, in order to increase the resistance value of the AC / DC differential calculable resistor, extending the length of the resistor wire is a conventional method. Since the volume of the calculated resistor is limited, a loop form must be used. At present, the British NPL uses an 8-loop line type to achieve a 10000Ω AC / DC differential calculable resistor, such as Figure 5 shown.

[0007] Figure 6 The figure is a schematic diagram of the expanded eight-level sub-type calculable resistor structure. The calculation of the eight-loop linear AC / DC differential calculable resistor is very difficult. In order to obtain the four-terminal pair admittance of the eight-level sub-type calculable resistor, the current I at the low current output end must be calculated first. out and the voltage V at the high potential input in To this end, a coordinate system is established with one end of the resistor as the zero point x=0 and the folded part of the resistor wire as x=Λ. The unfolded eight-level subtype can calculate the resistance, as shown in Figure 6 shown.

[0008] According to the traditional method of balancing transmission lines, the changes in current and voltage along the infinitesimal element x in each parallel resistance wire can be obtained, that is, Where m = 1, 2, 3, 4, 5, 6, 7, 8. Then redefine a set of variables,

[0009] I 1 =i 1 -i 2 +i 3 -i 4 +i 5 -i 6 +i 7 -i 8 , I 2 =i 1 +i 2 +i3 +i 4 +i 5 +i 6 +i 7 +i 8

[0010] I 3 =i 1 -i 2 -i 3 +i 4 +i 5 -i 6 -i 7 +i 8 ,I 4 =i 1 +i 2 -i 3 -i 4 +i 5 +i 6 -i 7 -i 8

[0011] I 5 =i 1 -i 2 +i 3 -i 4 -i 5 +i 6 -i 7 +i 8 ,I 6 =i 1 +i 2 +i 3 +i 4 -i 5 -i 6 -i 7 -i 8

[0012] I 7 =i 1 +i 2 -i 3 -i 4 -i 5 -i 6 +i 7 +i 8 ,I 8 =i 1 -i 2 -i 3 +i 4 -i 5 +i 6 +i 7 -i 8

[0013] According to these eight equations, we can get i 8 The relationship between and new variables. Similarly, we can also redefine a set of new variables to get v 1 , v 8 The relationship between the new variable and the boundary condition (v 1 ) x＝0 =V in ,(v 8 ) x＝0 =0, while I out =(i 8 ) x＝0 , combined with the previous formula, we can get the four-terminal admittance of the calculable resistor

[0014] G P =Re(Y 4TP )=Re(I out / V in )

[0015] From this, we can get the calculation formulas for the parallel equivalent resistance, the resistance time constant, and the series equivalent resistance. The eight-loop line type can be used to calculate the geometric dimensions of the resistor. Using the Grove formula, the value of its parasitic inductance can be calculated, and then the value of the parasitic capacitance can be estimated based on the capacitance coefficient method. The calculated parasitic inductance is 5.97μH and the parasitic capacitance is 12.1pF.

[0016] The reform of the International System of Units and the tracing of measurement units to basic physical constants are the general trend. Impedance units will be traced back to quantum sources worldwide in the next few years. A few European national laboratories have partially achieved this. my country is still in the initial stage of developing AC quantum resistance samples, but my country is at the forefront of the world in the development of AC quantum resistance transfer bridges. In view of the fact that it will take some time to develop AC quantum resistance samples, it is proposed to develop a resistor that can be calculated by the AC / DC difference of equivalent AC quantum resistance. However, the existing AC / DC difference resistor that can be calculated close to the resistance value of quantum resistance requires a very long resistor wire, which has a complex structure, and the parasitic inductance and parasitic capacitance are proportional to the length of the resistor wire. The electromagnetic field calculation is extremely difficult, which increases the AC / DC difference of the resistor and has poor stability. Summary of the invention

[0017] In view of the defects or shortcomings in the prior art, the present invention provides a calculable AC / DC difference resistor that simulates AC quantum resistance, which is conducive to solving the problems of complex structure and difficult calculation of high-resistance AC / DC difference calculable resistors. It can be used to verify the uncertainty of a four-terminal quantum resistance transfer bridge in a working state, and can also be used to verify the AC quantum Hall effect, thereby realizing the mutual verification of traditional classical methods and cutting-edge technologies.

[0018] The technical solution of the present invention is as follows:

[0019] A resistor that can calculate the difference between AC and DC and simulates AC quantum resistance, characterized in that it includes a copper metal cylinder, a small-sized resistor is arranged at the center of the middle cavity axis of the copper metal cylinder, the resistance value of the small-sized resistor is 12906Ω, 12906Ω is the integer part of the commonly used resistance value of quantum resistance 12906.4037Ω, the time constant of the small-sized resistor is ≤2ns, the axial length of the small-sized resistor is 0.5% to 1.5% of the length of the middle cavity, the left end face of the small-sized resistor is connected to a left-end copper wire extending to the left along the middle cavity axis, the left-end copper wire passes through the epoxy resin copper-clad plate at the left end of the middle cavity to form a first left-end connector and a second left-end connector in the left cavity of the copper metal cylinder, the right end face of the small-sized resistor is connected to a right-end copper wire extending to the right along the middle cavity axis, the right-end copper wire passes through the epoxy resin copper-clad plate at the right end of the middle cavity to form a first right-end connector and a second right-end connector in the right cavity of the copper metal cylinder.

[0020] The small-size resistor is a chip resistor.

[0021] The small-size resistor is a metal film resistor.

[0022] The length of the middle cavity of the copper metal cylinder is 240mm~280mm, the length of the left cavity is 20mm~30mm, the length of the right cavity is 20mm~30mm, the thickness of the epoxy resin copper clad laminate is 1.5mm~2mm, the first left end connector is 13mm~16mm away from the left surface of the epoxy resin copper clad laminate at the left end of the middle cavity, the second left end connector is 8mm~11mm away from the left surface of the epoxy resin copper clad laminate at the left end of the middle cavity, the first right end connector is 13mm~16mm away from the right surface of the epoxy resin copper clad laminate at the right end of the middle cavity, and the second right end connector is 8mm~11mm away from the right surface of the epoxy resin copper clad laminate at the right end of the middle cavity.

[0023] The first left end connector is connected to the high current end of the outer circumferential surface of the left section cavity cylinder through a lead, the second left end connector is connected to the high potential end of the outer circumferential surface of the left section cavity cylinder through a lead, the first right end connector is connected to the low current end of the outer circumferential surface of the right section cavity cylinder through a lead, and the second right end connector is connected to the low potential end of the outer circumferential surface of the right section cavity cylinder through a lead, the high current end and the high potential end are perpendicular to each other, and the low current end and the low potential end are perpendicular to each other.

[0024] The outer diameter of the copper metal cylinder is 37 mm to 47 mm, the inner diameter is 35 mm to 45 mm, and the length is 290 mm to 350 mm.

[0025] The high current end, high potential end, low current end and low potential end all use BNC coaxial cable connection connectors.

[0026] A calculable distributed inductance or parasitic inductance is formed between the copper wire between the second left-end connector and the second right-end connector and the copper metal cylinder, and a calculable distributed capacitance or parasitic capacitance is formed.

[0027] The parasitic inductance is 400nH to 600nH, and the parasitic capacitance is 1.9pF to 3.9pF.

[0028] The technical effects of the present invention are as follows: the present invention is a calculable AC / DC difference resistor that simulates AC quantum resistance. By adopting a coaxial calculable AC / DC difference resistor with a short resistance wire, the distributed parameters of the coaxial structure (i.e., parasitic inductance and parasitic capacitance) are calculated, and then a resistor with a very small volume of 12906Ω (such as a chip resistor or a metal film resistor) is added in the middle of the structure. The calculable AC / DC difference resistor of 12906Ω is formed by adding a chip resistor or a metal film resistor with very small frequency variation and the distributed parameters of the coaxial calculable AC / DC difference resistor. The calculable AC / DC difference resistor can be used to verify the uncertainty of a four-terminal quantum resistance transfer bridge in a working state, and can also be used to verify the AC quantum Hall effect, thereby realizing the mutual verification of traditional classical methods and cutting-edge technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the quantized Hall effect.

[0030] Figure 2 It is a schematic diagram of the AC quantum resistance transfer bridge structure.

[0031] Figure 3 This is a schematic diagram of the frequency characteristics of the AC quantized Hall effect on a conventional sample.

[0032] Figure 4 It is a schematic diagram of the shielding structure of the AC quantized Hall resistance sample.

[0033] Figure 5 It is a schematic diagram of an eight-circuit AC / DC differential calculable resistance structure.

[0034] Figure 6 It is a schematic diagram of the expanded eight-level sub-type computable resistor structure.

[0035] Figure 7 The present invention is a schematic diagram of a resistor structure for simulating AC quantum resistance and calculating the difference between AC and DC. Figure 7The reference numerals in the figure are as follows: 1-small size resistor (its resistance value is determined to be 12906Ω according to the commonly used resistance value of quantum resistor 12906.4037Ω); 2-right end copper wire (its function includes conducting electricity and forming a calculable distributed inductance or parasitic inductance by being coaxial with the copper metal cylinder, as well as forming a calculable distributed capacitance or parasitic capacitance); 3-epoxy resin clad copper plate at the left end of the middle cavity; 4-copper metal cylinder; 5-high current end; 6-low current end; 7-low current end; 8-low current end; 9-low current end; 10-low current end; 11-low current end; 12-low current end; 13-low current end; 14-high current end; 15-low current end; 16-low current end; 17-low current end; 18-low current end; 19-low current end; 20-low current end; 21-low current end; 22-low current end; 23-low current end; 24-low current end; 25-low current end; 26-low current end; 27-low current end; 28-low current end; 29-low current end; 30-low current end; 31-low current end; 32-low current end; 33-low current end; 34-low current end; 35-low current end; 36-low current end; 37-low current end; 38-low current end; 39-low current end; 40-high current end; 41 -high potential end; 8-low potential end; 9-left end copper wire (its function includes conducting electricity and forming a calculable distributed inductance or parasitic inductance by being coaxial with the copper metal cylinder, as well as forming a calculable distributed capacitance or parasitic capacitance); 10-epoxy resin copper clad board at the right end of the middle cavity; 11-first left end connector; 12-first right end connector; 13-middle cavity; 14-left cavity; 15-right cavity; 16-second left end connector; 17-second right end connector. DETAILED DESCRIPTION

[0036] Below is the attached figure ( Figure 7 ) and Examples illustrate the present invention.

[0037] Figure 7 This is a schematic diagram of a resistor structure that can calculate the AC / DC difference of a simulated AC quantum resistor according to the present invention. Figure 7 As shown, an AC / DC difference calculable resistor simulating an AC quantum resistor comprises a copper metal cylinder 4, a small-sized resistor 1 is arranged at the center of the axis of the middle cavity 13 of the copper metal cylinder 4, the resistance of the small-sized resistor 1 is 12906Ω, 12906Ω is the integer part of the commonly used resistance of the quantum resistor 12906.4037Ω, the time constant of the small-sized resistor 1 is ≤2ns, the axial length of the small-sized resistor 1 is 0.5% to 1.5% of the length of the middle cavity, and the left end surface of the small-sized resistor 1 is connected to A left copper wire 9 extending to the left along the axis of the middle cavity is connected, and the left copper wire 9 passes through the epoxy resin copper-clad plate 3 at the left end of the middle cavity to form a first left end connector 11 and a second left end connector 16 in the left cavity 14 of the copper metal cylinder 4. The right end face of the small-sized resistor 1 is connected to a right copper wire 2 extending to the right along the axis of the middle cavity 13, and the right copper wire 2 passes through the epoxy resin copper-clad plate 10 at the right end of the middle cavity to form a first right end connector 12 and a second right end connector 17 in the right cavity 15 of the copper metal cylinder 4. The small-sized resistor 1 is a chip resistor. The small-sized resistor 1 is a metal film resistor.

[0038] The length of the middle cavity of the copper metal cylinder is 240mm~280mm, the length of the left cavity is 20mm~30mm, the length of the right cavity is 20mm~30mm, the thickness of the epoxy resin copper clad laminate is 1.5mm~2mm, the first left end connector is 13mm~16mm away from the left surface of the epoxy resin copper clad laminate at the left end of the middle cavity, the second left end connector is 8mm~11mm away from the left surface of the epoxy resin copper clad laminate at the left end of the middle cavity, the first right end connector is 13mm~16mm away from the right surface of the epoxy resin copper clad laminate at the right end of the middle cavity, and the second right end connector is 8mm~11mm away from the right surface of the epoxy resin copper clad laminate at the right end of the middle cavity.

[0039] The first left end connector 11 is connected to the high current end 5 of the outer circumference of the left section cavity cylinder through a lead wire, the second left end connector 16 is connected to the high potential end 7 of the outer circumference of the left section cavity cylinder through a lead wire, the first right end connector 12 is connected to the low current end 6 of the outer circumference of the right section cavity cylinder through a lead wire, and the second right end connector 17 is connected to the low potential end 8 of the outer circumference of the right section cavity cylinder through a lead wire, the high current end 5 and the high potential end 7 are perpendicular to each other, and the low current end 6 and the low potential end 8 are perpendicular to each other. The outer diameter of the copper metal cylinder is 37mm to 47mm, the inner diameter is 35mm to 45mm, and the length is 290mm to 350mm. The high current end 5, the high potential end 7, the low current end 6 and the low potential end 8 all use BNC coaxial cable connection connectors (BNC, Bayonet Nut Connector, or Bayonet Neill–Concelman, snap-fit ​​connector or Neill–Concelman bayonet, is a coaxial cable connection connector).

[0040] The copper wire between the second left end connector 16 and the second right end connector 17 (the left end copper wire 9 and the right end copper wire 2 can be regarded as continuous copper wires, the small size resistor 1 in the middle can be ignored because of its small axial size, and the copper wire diameter is less than 0.5 mm) forms a calculable distributed inductance or parasitic inductance, as well as a calculable distributed capacitance or parasitic capacitance with the copper metal cylinder 4. The parasitic inductance is 400nH to 600nH, and the parasitic capacitance is 1.9pF to 3.9pF.

[0041] The invention proposes an AC / DC difference calculable resistor for simulating AC quantum resistance, which adopts a solution of chip resistors, copper wires and metal cylinders. The invention has the advantages of simple manufacture, simple calculation, small frequency error and small deviation, and realizes a highly stable 12906Ω AC / DC difference calculable resistor, solves the problems of complex structure and difficult calculation of high-resistance AC / DC difference calculable resistor, can be used to verify the uncertainty of a four-terminal quantum resistance transfer bridge in a working state, and can also be used to verify the AC quantum Hall effect, realizing the mutual verification of traditional classical methods and cutting-edge technologies.

[0042] The chip resistor is used to generate the value of equivalent quantum resistance, and the distributed inductance and distributed capacitance are calculated using the structure of the single-filament coaxial AC / DC differential calculable resistor. The two are superimposed to form a 12906Ω AC / DC differential calculable resistor with high short-term stability. According to the calculation model of the coaxial AC / DC differential calculable resistor, the AC / DC differential calculable parasitic inductance of 30cm in length and 4cm in diameter is ≤500nH and the parasitic capacitance is ≤3pF (much smaller than the parasitic inductance of 5.97μH and the parasitic capacitance of 12.1pF of the eight-loop linear calculable resistor), which is much smaller than the distributed parameters of the eight-loop linear AC / DC differential calculable resistor.

[0043] In order to reduce the influence of parasitic inductance and parasitic capacitance on the AC / DC difference, the AC / DC difference calculable resistor adopts a single-wire coaxial structure, with four coaxial interfaces of high current end, low current end, high potential end and low potential end, all of which adopt BNC connectors (BNC, Bayonet Nut Connector, or Bayonet Neill–Concelman, snap-fit ​​connector or Neill–Concelman bayonet, a coaxial cable connection connector) to eliminate the impedance of the lead itself and the influence of mutual inductance between them. The high current end and the high potential end are located on the same side, perpendicular to each other; the low current end and the low potential end are located on the same side, perpendicular to each other, to better ensure that the resistance wire is at the center of the metal cylinder.

[0044] To prevent electromagnetic leakage, an epoxy resin copper-clad board is placed 2 to 4 cm away from each end of the metal cylinder. The radius of the copper-clad board is slightly smaller than the radius of the end face of the metal cylinder and is connected to the metal cylinder through insulating glue.

[0045] In order to reduce the influence of the Peltier effect on the AC and DC differences, when making resistors, a connecting wire is added between the current end and the potential end. The potential end is led out from the outside of the epoxy resin copper clad board (1 to 1.5) cm, and the current end is led out from the outside of the epoxy resin copper clad board (1.6 to 2) cm. The connection points are all crimped, avoiding the thermoelectric potential caused by welding of two different metal materials, thereby reducing the AC and DC differences introduced by the thermoelectric potential.

[0046] In view of the shortcomings of existing AC quantum resistance samples and AC / DC difference calculable resistors, the present invention proposes an AC / DC difference calculable resistor that simulates AC quantum resistance. The resistor adopts a coaxial AC / DC difference calculable resistor with a short resistance wire, calculates the distributed parameters of the coaxial structure, and then adds a 12906Ω resistor with a very small volume (such as a chip resistor) in the middle of the structure. The AC / DC difference calculable resistor of 12906Ω is formed by adding the distributed parameters of the coaxial AC / DC difference calculable resistor with a very small frequency variation and the coaxial AC / DC difference calculable resistor.

[0047] The shape between the copper wire and the metal cylinder is regular, the electromagnetic field is closed in the cylinder, and the electromagnetic field is not radiated outward. The parasitic inductance and parasitic capacitance can be directly calculated; the sheet resistor provides a resistance value of 12906Ω, and the frequency error is small, and its influence can be ignored. Therefore, the AC / DC difference calculable resistor with high short-term stability and simulated AC quantum resistance can be obtained.

[0048] A resistor that can calculate the difference between AC and DC and simulates AC quantum resistance. The resistor that can calculate the difference between AC and DC is a coaxial four-terminal pair resistor that can calculate the difference between AC and DC and comprises a copper metal cylinder, an epoxy resin copper-clad plate, a copper wire, a BNC connector, and a chip resistor. The resistor is characterized in that the straight copper wire is placed on the central axis of the length direction of the metal cylinder cavity; the chip resistor is located at the center of the straight copper wire and connects the copper wires at both ends; the copper wire passes through the central hole of the epoxy resin copper-clad plate; the copper wire that passes through the central hole of the epoxy resin copper-clad plate is respectively connected to four BNC connectors at both ends to form a four-terminal pair resistor.

[0049] The parasitic inductance is proportional to the length of the resistance wire. If the copper wire is longer, the AC / DC difference increases. Therefore, the length of the metal cylinder is between 25 and 30 cm.

[0050] The larger the diameter of the metal cylinder is, the smaller the AC / DC difference caused by parasitic inductance and parasitic capacitance is. Therefore, the diameter of the metal cylinder is (3-6) cm, the thickness is (1-2) mm, and the material is preferably copper.

[0051] The resistance of the chip resistor is 12906Ω. In order to reduce the influence of its frequency error, a small package is selected, preferably a 0603 package (0603 refers to the component package size. It is usually expressed in imperial system, called 0603, with a length of 06, represented by L, 0.6 inches, and a width of 03, represented by W, 0.3 inches. To convert from imperial system to metric system, multiply by 25.4mm, and 1 inch is 25.4mm). Its influence on the coaxial structure can be ignored, and a resistance value for simulating the reproduction of the AC quantized Hall effect is generated.

[0052] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. It is pointed out here that the above description helps those skilled in the art to understand the invention, but does not limit the protection scope of the invention. Any equivalent replacement, modification and / or simplification of the above description without departing from the essence of the invention falls within the protection scope of the invention.

Claims

1. A resistor that can be calculated by the difference between AC and DC and simulates AC quantum resistance, characterized in that: It comprises a copper metal cylinder, a small-sized resistor is arranged at the center of the axis of the middle cavity of the copper metal cylinder, the resistance of the small-sized resistor is 12906Ω, 12906Ω is the integer part of the commonly used resistance of quantum resistor 12906.4037Ω, the time constant of the small-sized resistor is ≤2ns, the axial length of the small-sized resistor is 0.5% to 1.5% of the length of the middle cavity, the left end face of the small-sized resistor is connected with a left-end copper wire extending to the left along the axis of the middle cavity, the left-end copper wire passes through the epoxy resin copper-clad plate at the left end of the middle cavity to form a first left-end connector and a second left-end connector in the left cavity of the copper metal cylinder, the right end face of the small-sized resistor is connected with a right-end copper wire extending to the right along the axis of the middle cavity, the right-end copper wire passes through the epoxy resin copper-clad plate at the right end of the middle cavity to form a first right-end connector and a second right-end connector in the right cavity of the copper metal cylinder; The first left end connector is connected to the high current end of the outer circumference of the left section cavity cylinder through a lead wire, the second left end connector is connected to the high potential end of the outer circumference of the left section cavity cylinder through a lead wire, the first right end connector is connected to the low current end of the outer circumference of the right section cavity cylinder through a lead wire, and the second right end connector is connected to the low potential end of the outer circumference of the right section cavity cylinder through a lead wire, the high current end and the high potential end are perpendicular to each other, and the low current end and the low potential end are perpendicular to each other; A calculable distributed inductance or parasitic inductance is formed between the copper wire between the second left-end connector and the second right-end connector and the copper metal cylinder, and a calculable distributed capacitance or parasitic capacitance is formed.

2. The AC / DC difference calculable resistor of the simulated AC quantum resistor according to claim 1, characterized in that: The small-size resistor is a chip resistor.

3. The AC / DC difference calculable resistor of the simulated AC quantum resistor according to claim 1, characterized in that: The small-size resistor is a metal film resistor.

4. The AC / DC difference calculable resistor of the simulated AC quantum resistor according to claim 1, characterized in that: The length of the middle cavity of the copper metal cylinder is 240mm~280mm, the length of the left cavity is 20mm~30mm, the length of the right cavity is 20mm~30mm, the thickness of the epoxy resin copper clad laminate is 1.5mm~2mm, the first left end connector is 13mm~16mm away from the left surface of the epoxy resin copper clad laminate at the left end of the middle cavity, the second left end connector is 8mm~11mm away from the left surface of the epoxy resin copper clad laminate at the left end of the middle cavity, the first right end connector is 13mm~16mm away from the right surface of the epoxy resin copper clad laminate at the right end of the middle cavity, and the second right end connector is 8mm~11mm away from the right surface of the epoxy resin copper clad laminate at the right end of the middle cavity.

5. The AC / DC difference calculable resistor of the simulated AC quantum resistor according to claim 1, characterized in that: The outer diameter of the copper metal cylinder is 37 mm to 47 mm, the inner diameter is 35 mm to 45 mm, and the length is 290 mm to 350 mm.

6. The AC / DC difference calculable resistor of the simulated AC quantum resistor according to claim 1, characterized in that: The high current end, high potential end, low current end and low potential end all use BNC coaxial cable connection connectors.

7. The AC / DC difference calculable resistor of the simulated AC quantum resistor according to claim 1, characterized in that: The parasitic inductance is 400nH to 600nH, and the parasitic capacitance is 1.9pF to 3.9pF.

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