An electric source electromagnetic emission system based on an adaptive resonant matching structure

Abstract

This invention belongs to the technical field of electromagnetic emission systems based on electric sources, specifically an electromagnetic emission system based on an adaptive resonant matching structure. The system includes: an adaptive resonant matching structure connected in series with a current source, the adaptive resonant matching structure including an adaptive resonant matching unit, and the adaptive resonant matching unit including an inductor L. C and resistance r L After being connected in series, it is connected in parallel with capacitor C, and in the inductor L C and resistance r L The first switch is set on the branch in series, and in the inductor L C and resistance r L After being connected in series with capacitor C, a second switch is set up. By changing the frequency of the first switch, the overall equivalent capacitance of the adaptive resonant matching unit is reduced. The transmitting system of this invention, employing an adaptive resonant matching structure, can adjust the equivalent capacitance within a certain range to adapt to the corresponding current input frequency.

Description

Technical Field

[0001] This invention belongs to the technical field of electromagnetic emission systems based on electric sources, specifically an electromagnetic emission system based on an adaptive resonant matching structure. Background Technology

[0002] The structure of a conventional electric source electromagnetic emission system is as follows: Figure 1 Because the transmitting antenna has inductance, the current will be affected at high frequencies, ultimately resulting in a lower than expected current. A common solution is to connect a resonant capacitor in series with the circuit for a single-frequency signal. However, this method cannot address the impact of different frequency input signals (e.g., 1-20kHz input current) on the circuit's output current; multiple resonant capacitors need to be connected in parallel, such as... Figure 2 This makes the circuit complex and unable to accurately match input signals of different frequencies. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an electromagnetic emission system based on an adaptive resonant matching structure for an electric source, which solves the problems of complex circuits and inability to accurately match input signals of different frequencies.

[0004] This invention is implemented as follows:

[0005] An electromagnetic emission system based on an adaptive resonant matching structure for an electric source, the system comprising:

[0006] An adaptive resonant matching structure is connected in series with the current source. The adaptive resonant matching structure includes an adaptive resonant matching unit, which includes an inductor L. C and resistance r L After being connected in series, it is connected in parallel with capacitor C, and in the inductor L C and resistance r L The first switch is set on the branch in series, and in the inductor L C and resistance r L After being connected in series and in parallel with capacitor C, a second switch is set up. By changing the frequency of the first switch, the overall equivalent capacitance of the adaptive resonant matching unit is reduced, and the equivalent capacitance is made close to the resonant capacitance of the input signal.

[0007] Furthermore, the adaptive resonance matching unit includes parallel 1-2kHz adaptive resonance matching units, 2-5kHz adaptive resonance matching units, 5-10kHz adaptive resonance matching units, and 10-20kHz adaptive resonance matching units.

[0008] Furthermore, the 1-2kHz adaptive resonant matching unit includes an inductor L C1 and resistance r L1After being connected in series, it is connected in parallel with capacitor C1; the 2-5kHz adaptive resonant matching unit includes inductor L C2 and resistance r L2 After being connected in series, it is connected in parallel with capacitor C2; the 5-10kHz adaptive resonant matching unit includes inductor L C3 and resistance r L3 After being connected in series, it is connected in parallel with capacitor C3; the 10-20kHz adaptive resonant matching unit includes inductor L C4 and resistance r L4 It is connected in series and then in parallel with capacitor C4.

[0009] Furthermore, the system's load impedance is:

[0010]

[0011] C is the resonant capacitance matched to the lowest value within the adaptive resonant frequency range, L is the inductance of the long conductor, R is the electrode grounding resistance, and L c For the adaptive matching unit inductor, r L This is the equivalent resistance of the adaptive matching unit.

[0012] Compared with the prior art, the beneficial effects of this invention are as follows:

[0013] This invention targets input currents of 10-20kHz, with output frequencies of 10kHz, 12kHz, 15kHz, 18kHz, and 20kHz as examples. Without impedance matching, the peak current is relatively low. By adding a series 10kHz resonant capacitor C, the increase in peak current is not significant except for the 10kHz input current. Adding an adaptive resonant matching unit (with the same capacitance C) significantly increases the peak current, except for the 10kHz current. This demonstrates that the adaptive resonant matching structure can adjust the equivalent capacitance within a certain range to adapt to the corresponding current input frequency. Attached Figure Description

[0014] Figure 1 It is a conventional electromagnetic emission system structure with an electrical source;

[0015] Figure 2 This is the structure of an electromagnetic emission system with a 1-20kHz series resonant capacitor electric source.

[0016] Figure 3 A schematic diagram of an electromagnetic emission system with an added adaptive resonant matching structure provided in an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the electromagnetic emission system of the 1-20kHz adaptive resonant matching structure electric source provided in an embodiment of the present invention;

[0018] Figure 5A schematic diagram of the structure of an electromagnetic emission system with a single adaptive resonant matching structure electric source provided in an embodiment of the present invention;

[0019] Figure 6 A 10kHz simulated current graph is provided for embodiments of the present invention;

[0020] Figure 7 A 12kHz simulated current graph is provided for embodiments of the present invention;

[0021] Figure 8 A 15kHz simulated current graph is provided for embodiments of the present invention;

[0022] Figure 9 A 18kHz simulated current graph is provided for embodiments of the present invention;

[0023] Figure 10 A 20kHz simulated current graph is provided for embodiments of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0025] See Figure 3 As shown, an electromagnetic emission system based on an adaptive resonant matching structure for an electric source is disclosed. The system includes: an adaptive resonant matching structure connected in series with a current source; the adaptive resonant matching structure includes an adaptive resonant matching unit; and the adaptive resonant matching unit includes an inductor L. C and resistance r L After being connected in series, it is connected in parallel with capacitor C1, and in the inductor L C1 and resistance r L1 The first switch is set on the branch in series, and in the inductor L C and resistance r L After being connected in series with capacitor C1, a second switch is set up. By changing the frequency of the first switch, the overall equivalent capacitance of the adaptive resonant matching unit is reduced.

[0026] To improve the high-frequency current output capability of the launch system, an electromagnetic launch system model based on an adaptive resonant matching structure electric source is established. C represents the resonant capacitance matched to the lowest value within the adaptive resonant frequency range, L is the inductance of the long conductor, and R is the electrode grounding resistance. c For the adaptive matching unit inductor, r L The equivalent resistance of the adaptive matching unit is given. The load impedances of a conventional transmitting system, a transmitting system with a series resonant capacitor, and a transmitting system with an added adaptive resonant matching structure are as follows:

[0027] Z=R+jωL (1)

[0028]

[0029]

[0030] For the electromagnetic transmission system structure of the 1-20kHz adaptive resonant matching structure electric source, taking the 10-20kHz adaptive resonant matching unit as an example, based on the determined load parameters, including antenna and grounding impedance, the adaptive resonant matching structure is designed. By changing the switching frequency, the overall equivalent capacitance is reduced to adapt to a larger input frequency.

[0031] See Figure 4 As shown, the adaptive resonant matching unit includes parallel 1-2kHz, 2-5kHz, 5-10kHz, and 10-20kHz adaptive resonant matching units. Each frequency adaptive resonant matching unit is equipped with a switch. By changing the frequency of the switch, the equivalent capacitance is changed, making the equivalent capacitance close to the resonant capacitance of the input signal.

[0032] The 1-2kHz adaptive resonant matching unit includes an inductor L C1 and resistance r L1 After being connected in series, it is connected in parallel with capacitor C1; the 2-5kHz adaptive resonant matching unit includes inductor L C2 and resistance r L2 After being connected in series, it is connected in parallel with capacitor C2; the 5-10kHz adaptive resonant matching unit includes inductor L C3 and resistance r L3 After being connected in series, it is connected in parallel with capacitor C3; the 10-20kHz adaptive resonant matching unit includes inductor L C4 and resistance r L4 It is connected in series and then in parallel with capacitor C4.

[0033] See Figure 5 As shown, the schematic diagram of a single adaptive resonant matching structure electromagnetic transmission system is shown. By controlling the switching devices to obtain an equivalent adjustable capacitor, the transmission circuit is forced to resonate under different transmission frequency conditions.

[0034] For input currents of 10-20kHz, with output frequencies of 10kHz, 12kHz, 15kHz, 18kHz, and 20kHz as examples, the peak current is relatively low without impedance matching. Adding a series 10kHz resonant capacitor C does not significantly increase the peak current except for the 10kHz input current. Adding an adaptive resonant matching unit (with the same capacitance C) significantly increases the peak current, except for the 10kHz current. This demonstrates that the adaptive resonant matching structure can adjust the equivalent capacitance within a certain range to adapt to the corresponding current input frequency. Simulation results are shown below. Figures 6 to 10 .

[0035] Tables 1 to 4 compare the current optimization data of the four adaptive modules in the 1-20kHz electrical source adaptive circuit.

[0036] Table 1 compares the current data of the 1-2kHz adaptive resonant matching module.

[0037]

[0038] Table 2 compares the current data of the 2-5kHz adaptive resonant matching module.

[0039]

[0040] Table 3 compares the current data of the 5-10kHz adaptive resonant matching module.

[0041]

[0042] Table 4 compares the current data of the 10-20kHz adaptive resonant matching module.

[0043]

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electromagnetic emission system based on an adaptive resonant matching structure for an electric source, characterized in that, The system includes: An adaptive resonant matching structure is connected in series with the current source. The adaptive resonant matching structure includes an adaptive resonant matching unit, which includes an inductor L. C and resistance r L After being connected in series, it is connected in parallel with capacitor C, and in the inductor L C and resistance r L The first switch is set on the branch in series, and in the inductor L C and resistance r L After being connected in series with capacitor C, a second switch is set up. By changing the frequency of the first switch, the overall equivalent capacitance of the adaptive resonant matching unit is reduced.

2. The electromagnetic emission system based on an adaptive resonant matching structure of an electric source according to claim 1, characterized in that, The adaptive resonance matching unit includes parallel 1-2kHz adaptive resonance matching units, 2-5kHz adaptive resonance matching units, 5-10kHz adaptive resonance matching units, and 10-20kHz adaptive resonance matching units.

3. The electromagnetic emission system based on an adaptive resonant matching structure of an electric source according to claim 2, characterized in that, The 1-2kHz adaptive resonant matching unit includes an inductor L. C1 and resistance r L1 After being connected in series, it is connected in parallel with capacitor C1; the 2-5kHz adaptive resonant matching unit includes inductor L C2 and resistance r L2 After being connected in series, it is connected in parallel with capacitor C2; the 5-10kHz adaptive resonant matching unit includes inductor L C3 and resistance r L3 After being connected in series, it is connected in parallel with capacitor C3; the 10-20kHz adaptive resonant matching unit includes inductor L C4 and resistance r L4 It is connected in series and then in parallel with capacitor C4.

4. The electromagnetic emission system based on an adaptive resonant matching structure of an electric source according to claim 3, characterized in that, The system's load impedance is: C is the resonant capacitance matched to the lowest value within the adaptive resonant frequency range, L is the inductance of the long conductor, R is the electrode grounding resistance, and L c For the adaptive matching unit inductor, r L This is the equivalent resistance of the adaptive matching unit.

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