Comb spectrum generator and electronic equipment

Abstract

The utility model discloses a comb spectrum generator and electronic equipment. The comb spectrum generator comprises a bias module, an input matching module and a selection module which are connected in sequence, the selection module is connected with an odd comb spectrum generation module and an even comb spectrum generation module, and the odd comb spectrum generation module and the even comb spectrum generation module are both connected with an output matching module. The odd comb spectrum generation module comprises a first odd pulse generation unit, an odd intermediate matching unit and a second odd pulse generation unit which are connected in sequence; the bias module is used for providing bias voltage; the input matching module is used for performing impedance matching on an input signal; the selection module is used for controlling an input signal to be input into the odd comb spectrum generation module or the even comb spectrum generation module so as to generate odd harmonics or even harmonics; and the output matching module is used for carrying out impedance matching on odd harmonics or even harmonics. The comb spectrum generator provided by the embodiment of the utility model is beneficial to improving the applicability and the use flexibility of the comb spectrum generator.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic technical field especially relates to a comb spectrum generator and electronic equipment. BACKGROUND

[0002] The comb spectrum generator is a kind of signal generator, and the output signal has the series harmonic component of input signal, and each harmonic component has significant signal power.Output signal usually includes a series of frequency uniform interval spectrum components, so that the spectrum of output signal is similar to the comb tooth of comb.

[0003] However, in prior art, the comb spectrum generator cannot select the parity of generated harmonic, the application scene of comb spectrum generator is narrow, which also causes the practicability and use flexibility of comb spectrum generator to be poor. SUMMARY

[0004] The utility model provides a kind of comb spectrum generator and electronic equipment to improve the practicability and use flexibility of comb spectrum generator.

[0005] According to an aspect of the utility model, a kind of comb spectrum generator is provided, the comb spectrum generator includes: bias module, input matching module, selection module, odd comb spectrum generation module, even comb spectrum generation module and output matching module;

[0006] The bias module is connected with the input matching module, and the input matching module is also connected with the selection module, and the selection module is also connected with the odd comb spectrum generation module and the even comb spectrum generation module, respectively, the odd comb spectrum generation module and the even comb spectrum generation module are all connected to the output matching module;The odd comb spectrum generation module includes first odd pulse generation unit, odd intermediate matching unit and second odd pulse generation unit connected in sequence;Wherein, first odd pulse generation unit, second odd pulse generation unit and even comb spectrum generation module are provided with step diode;

[0007] The bias module is used to provide bias voltage;The input matching module is used to impedance match input signal;The selection module is used to control the input signal input to the odd comb spectrum generation module or the even comb spectrum generation module;The odd intermediate matching unit is used to impedance match the first odd pulse generation unit and the second odd pulse generation unit;The first odd pulse generation unit and the second odd pulse generation unit are used to generate odd harmonic;The even comb spectrum generation module is used to generate even harmonic;The output matching module is used to impedance match odd harmonic or even harmonic.

[0008] Optionally, the first odd pulse generating unit comprises a first step diode and a second step diode.

[0009] The anode of the first step diode is connected with the selection module, and the cathode of the first step diode is connected with the odd intermediate matching unit; the anode of the second step diode is connected with the cathode of the first step diode; and the cathode of the second step diode is connected with the anode of the first step diode.

[0010] Optionally, the second odd pulse generating unit comprises a third step diode and a fourth step diode.

[0011] The anode of the third step diode is connected with the odd intermediate matching unit, and the cathode of the third step diode is connected with the output matching module; the anode of the fourth step diode is connected with the cathode of the third step diode; and the cathode of the fourth step diode is connected with the anode of the third step diode.

[0012] Optionally, the even comb spectrum generating module comprises an even splitting unit, a first even pulse generating unit, a second even pulse generating unit and an even synthesizing unit.

[0013] The input end of the even splitting unit is connected with the selection module, the first output end and the second output end of the even splitting unit are respectively connected with the first even pulse generating unit and the second even pulse generating unit, the first even pulse generating unit is further connected with the even synthesizing unit, the second even pulse generating unit is further connected with the even synthesizing unit, and the even synthesizing unit is further connected with the output matching module.

[0014] The even splitting unit is used for splitting the input signal into first and second excitation signals which are equal in amplitude and opposite in phase; the first even pulse generating unit is used for generating a first harmonic signal according to the first excitation signal; the second even pulse generating unit is used for generating a second harmonic signal according to the second excitation signal; and the even synthesizing unit is used for synthesizing the first and second harmonic signals to generate an even harmonic.

[0015] Optionally, the first even pulse generating unit comprises a fifth step diode.

[0016] The anode of the fifth step diode is connected with the even splitting unit, and the cathode of the fifth step diode is connected with the even synthesizing unit.

[0017] And / or,

[0018] The second even pulse generating unit comprises a sixth step diode.

[0019] The anode of the sixth step diode is connected with the even order splitting unit, and the cathode of the sixth step diode is connected with the even order synthesis unit.

[0020] Optionally, the even order splitting unit comprises a center-tapped transformer.

[0021] Optionally, the even order splitting unit comprises an input power divider, a phase shifter and an attenuator.

[0022] The input power divider is connected with the selection module, and the input power divider is further connected with the phase shifter and the attenuator respectively, the phase shifter is further connected with the first odd order pulse generating unit, and the attenuator is further connected with the second odd order pulse generating unit.

[0023] The input power divider is used for splitting the input signal into a first split signal and a second split signal, the phase shifter is used for phase shifting the first split signal to obtain a first excitation signal, and the attenuator is used for reducing the amplitude of the second split signal to obtain a second excitation signal.

[0024] Optionally, the even order synthesis unit comprises an output power divider.

[0025] Optionally, the selection module comprises a single-pole double-throw switch.

[0026] According to another aspect of the utility model, an electronic device is also provided, and the electronic device comprises the comb spectrum generator provided in any one of the above embodiments.

[0027] The biasing module drives the first odd order pulse generating unit, the second odd order pulse generating unit and the even order comb spectrum generating module, and the selection module selects the output path of the input signal to control the input signal to be input to the odd order comb spectrum generating module or the even order comb spectrum generating module, so that the generation of the odd order harmonic or the even order harmonic is selected.

[0028] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to make the technical scheme in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0030] Figure 1 is a schematic diagram of a comb spectrum generator provided by the embodiment of the present application;

[0031] Figure 2 is a schematic diagram of another comb spectrum generator provided by the embodiment of the present application;

[0032] Figure 3 is a schematic diagram of another comb spectrum generator provided by the embodiment of the present application;

[0033] Figure 4 is a schematic diagram of another comb spectrum generator provided by the embodiment of the present application;

[0034] Figure 5 is a schematic diagram of another comb spectrum generator provided by the embodiment of the present application;

[0035] Figure 6 is a schematic diagram of an electronic device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the technical scheme in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the embodiments in the present application.

[0037] It should be noted that the terms "first", "second", and the like in the description and in the claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] The utility model embodiment provides a comb spectrum generator. The bias module of this comb spectrum generator drives odd order comb spectrum generation module or even order comb spectrum generation module through selection module, can select to generate odd order harmonic or even order harmonic according to demand, the applicable scene is various, is favorable to improve the applicability and use flexibility of comb spectrum generator. Figure 1 It is a kind of comb spectrum generator of the utility model embodiment schematic diagram. Refer to Figure 1 The comb spectrum generator includes: bias module 110, input matching module 120, selection module 130, odd order comb spectrum generation module 140, even order comb spectrum generation module 150 and output matching module 160.

[0039] Bias module 110 is connected with input matching module 120, input matching module 120 is also connected with selection module 130, selection module 130 is also connected odd order comb spectrum generation module 140 and even order comb spectrum generation module 150 respectively, and odd order comb spectrum generation module 140 and even order comb spectrum generation module 150 are all connected to output matching module 160;Odd order comb spectrum generation module 140 includes first odd order pulse generation unit 141, odd order intermediate matching unit 142 and second odd order pulse generation unit 143 connected in sequence;Wherein, first odd order pulse generation unit 141, second odd order pulse generation unit 143 and even order comb spectrum generation module 150 are provided with step diode. Bias module 110 is used to provide bias voltage;Input matching module 120 is used to impedance match input signal;Selection module 130 is used to control input signal to input to odd order comb spectrum generation module 140 or even order comb spectrum generation module 150;Odd order intermediate matching unit 143 is used to impedance match first odd order pulse generation unit 141 and second odd order pulse generation unit 143;First odd order pulse generation unit 141 and second odd order pulse generation unit 143 are used to generate odd order harmonic;Even order comb spectrum generation module 150 is used to generate even order harmonic;Output matching module 160 is used to impedance match odd order harmonic or even order harmonic.

[0040] Specifically, the bias module 110 provides appropriate bias voltage for the step diodes in the first odd pulse generating unit 141, the second odd pulse generating unit 143 and the even comb spectrum generating module 150, so that the step diodes in the first odd pulse generating unit 141, the second odd pulse generating unit 143 and the even comb spectrum generating module 150 generate current steps. The input signal is input to the input matching module 120 through the bias module 110, and the input matching module 120 impedance matches the input signal, so that the input signal is matched with the impedance of the odd comb spectrum generating module 140 or the even comb spectrum generating module 150, thereby reducing the loss of the input signal.

[0041] The selection module 130 selects the output path of the input signal. The selection module 130 has two output paths, one of which is connected to the odd comb spectrum generating module 140, and the other of which is connected to the even comb spectrum generating module 150. Exemplarily, the selection module 130 can be a single-pole double-throw switch. When the input signal is input to the odd comb spectrum generating module 140, the input matching module 120 impedance matches the input signal with the odd comb spectrum generating module 140, and the odd comb spectrum generating module 140 generates odd harmonics according to the impedance matched input signal; when the input signal is input to the odd comb spectrum generating module 140, the input matching module 120 impedance matches the input signal with the even comb spectrum generating module 150, and the even comb spectrum generating module 150 generates even harmonics according to the impedance matched input signal.

[0042] Wherein, when the input signal is input to the odd comb spectrum generation module 140 through the selection module 130, the step diode in the first odd pulse generation unit 141 and the second odd pulse generation unit 143 obtains a step current, and the step diode in the first odd pulse generation unit 141 and the second odd pulse generation unit 143 compresses the rising edge and the falling edge of the input signal, so that the rising edge and the falling edge of the input signal become steep, and the waveform of the input signal is approximated to a square wave. It should be noted that, according to Fourier series theory, when the Fourier coefficient of a function satisfying the square wave characteristic is calculated, the integral values of the positive half cycle and the negative half cycle of the even harmonic integral term in a period are equal in size and opposite in sign, and they cancel each other out, resulting in zero coefficients of even harmonics. That is, when the input signal is a square wave, only odd harmonics are excited in the process of exciting the harmonics of the input signal. The odd comb spectrum generation module 140 transforms the waveform of the input signal and excites the harmonics of the input signal through the step diode in the first odd pulse generation unit 141 and the second odd pulse generation unit 143. In this process, the waveform of the input signal is approximated to a square wave, and the input signal generates rich odd harmonics, thereby realizing the suppression of even harmonics.

[0043] The bias module 110 drives the first odd pulse generation unit 141, the second odd pulse generation unit 143 and the even comb spectrum generation module 150, and selects the output path of the input signal through the selection module 130 to control the input signal to be input to the odd comb spectrum generation module 140 or the even comb spectrum generation module 150, thereby realizing the selection of the generation of odd harmonics or even harmonics. The bias module 110 drives the odd comb spectrum generation module 140 or the even comb spectrum generation module 150 through the selection module, can select to generate odd harmonics or even harmonics according to the needs, is suitable for various scenes, and is beneficial to improve the applicability and use flexibility of the comb spectrum generator.

[0044] Figure 2 is another schematic view of a comb spectrum generator provided by the embodiment of the utility model. On the basis of the above embodiment, optionally, referring to Figure 2 , the first odd pulse generation unit 141 comprises: a first step diode D1 and a second step diode D2.

[0045] The anode of the first step diode D1 is connected with the selection module 130, and the cathode of the first step diode D1 is connected with the odd intermediate matching unit 142. The anode of the second step diode D2 is connected with the cathode of the first step diode D1. The cathode of the second step diode D2 is connected with the anode of the first step diode D1.

[0046] On the basis of the above-mentioned embodiments, optionally, continuing to refer to Figure 2 The second odd pulse generating unit 143 comprises a third step diode D3 and a fourth step diode D4.

[0047] The anode of the third step diode D3 is connected with the odd intermediate matching unit 142, and the cathode of the third step diode D3 is connected with the output matching module 160; the anode of the fourth step diode D4 is connected with the cathode of the third step diode D3; and the cathode of the fourth step diode D4 is connected with the anode of the third step diode D3.

[0048] Specifically, the step diode has the characteristics of storing charge when conducting in the forward direction and releasing charge quickly when cutting off in the reverse direction, and the reverse recovery time is extremely short, so that the state transition from conducting to cutting off can be realized in a very short time, and an abrupt voltage or current change is generated. In the reverse parallel structure, when the input signal is the positive half cycle, one diode conducts in the forward direction and the other diode cuts off in the reverse direction; when the input signal is the negative half cycle, the conducting and cutting off states are reversed. The two diodes work alternately, and the input signal is processed by using the step characteristics of each diode.

[0049] The first step diode D1 and the second step diode D2 are connected in reverse parallel, and the first step diode D1 and the second step diode D2 work alternately and transform the waveform of the input signal by using the step characteristics of each diode, and excite the harmonics of the input signal. Similarly, the third step diode D3 and the fourth step diode D4 are connected in reverse parallel, and the third step diode D3 and the fourth step diode D4 also transform the waveform of the input signal by using the step characteristics of each diode, and excite the harmonics of the input signal.

[0050] The input signal is output to the third step diode D3 and the fourth step diode D4 for further processing after being processed by the first step diode D1 and the second step diode D2, so as to improve the power of the generated harmonic signal and enrich the generated harmonics. Among them, the odd intermediate matching unit 142 matches the impedance between the first step diode D1 and the third step diode D3, and the odd intermediate matching unit 142 matches the impedance between the second step diode D2 and the fourth step diode D4, so as to reduce the loss of signal transmission and further improve the power of the generated harmonic signal.

[0051] Figure 3 is another comb spectrum generator provided by the embodiment of the utility model. On the basis of the above-mentioned embodiments, optionally, referring to Figure 3 The even comb spectrum generating module 150 comprises an even splitting unit 151, a first even pulse generating unit 152, a second even pulse generating unit 153 and an even synthesizing unit 154.

[0052] The input end of the even-order splitting unit 151 is connected with the selection module 130, the first output end and the second output end of the even-order splitting unit 151 are respectively connected with the first even-order pulse generating unit 152 and the second even-order pulse generating unit 153, the first even-order pulse generating unit 152 is further connected to the even-order synthesis unit 154, the second even-order pulse generating unit 153 is further connected to the even-order synthesis unit 154, and the even-order synthesis unit 154 is further connected with the output matching module 160. The even-order splitting unit 151 is used for splitting the input signal into the first excitation signal and the second excitation signal which are equal in amplitude and opposite in phase; the first even-order pulse generating unit 152 is used for generating the first harmonic signal according to the first excitation signal; the second even-order pulse generating unit 153 is used for generating the second harmonic signal according to the second excitation signal; and the even-order synthesis unit 154 is used for synthesizing the first harmonic signal and the second harmonic signal to generate the even-order harmonic.

[0053] Specifically, when the input signal is input to the even-order comb spectrum generating module 150 through the selection module 130, the even-order splitting unit 151 splits the input signal into two paths, which are the first excitation signal and the second excitation signal. The first excitation signal and the second excitation signal are equal in amplitude and opposite in phase. Exemplarily, the even-order splitting unit 151 can be a center-tapped transformer, and the secondary winding of the center-tapped transformer is divided into two parts with equal number of turns. Due to the magnetic field generated by the two parts of the winding in the same magnetic core, according to the right-hand rule of electromagnetic induction, the induced electromotive force generated in the two windings is equal in size but opposite in direction. The two signals drawn from the center tap form equal-amplitude and opposite-phase excitation signals.

[0054] The first even-order pulse generating unit 152 obtains the first excitation signal and excites the harmonics of the first excitation signal to obtain the first harmonic signal. The second even-order pulse generating unit 153 obtains the second excitation signal and excites the harmonics of the second excitation signal to obtain the second harmonic signal. Since the first excitation signal and the second excitation signal are opposite in phase, the odd-order harmonics in the first harmonic signal generated according to the first excitation signal and the odd-order harmonics in the second harmonic signal generated according to the second excitation signal are also opposite in phase, but the even-order harmonics in the first harmonic signal generated according to the first excitation signal and the even-order harmonics in the second harmonic signal generated according to the second excitation signal are the same in phase.

[0055] The even order synthesizing unit 154 acquires the first harmonic signal and the second harmonic signal and synthesizes the first harmonic signal and the second harmonic signal. Exemplarily, the even order synthesizing unit 154 can be an output power divider. Since the odd order harmonics in the first harmonic signal and the odd order harmonics in the second harmonic signal are opposite in phase, and the even order harmonics in the first harmonic signal and the even order harmonics in the second harmonic signal are same in phase, when the first harmonic signal and the second harmonic signal are synthesized, the odd order harmonics in the first harmonic signal and the odd order harmonics in the second harmonic signal are mutually cancelled, and the even order harmonics in the first harmonic signal and the even order harmonics in the second harmonic signal are mutually superposed to generate even order harmonics and suppress odd order harmonics.

[0056] Figure 4 is a schematic diagram of another comb spectrum generator provided by the embodiment of the present application. On the basis of the above-mentioned embodiments, optionally, referring to Figure 4 , the first even order pulse generating unit 152 comprises a fifth step diode D5.

[0057] The anode of the fifth step diode D5 is connected with the even order splitting unit 151, and the cathode of the fifth step diode D5 is connected with the even order synthesizing unit 154. When the first excitation signal is input into the fifth step diode D5, under the action of the rising edge of the first excitation signal, the fifth step diode D5 is forward conducting and starts to store charges, under the action of the falling edge of the first excitation signal, the fifth step diode D5 is converted from the forward conducting state to the reverse cut-off state, and the charges stored in the fifth step diode D5 start to be rapidly released to form a reverse current spike. Due to the step change of the junction capacitance and the rapid change of the reverse current spike, rich harmonics, i.e. the first harmonic signal, are generated.

[0058] Continuing to refer to Figure 4 , the second even order pulse generating unit 153 comprises a sixth step diode D6.

[0059] The anode of the sixth step diode D6 is connected with the even order splitting unit 151, and the cathode of the sixth step diode D6 is connected with the even order synthesizing unit 154. When the second excitation signal is input into the sixth step diode D6, under the action of the rising edge of the second excitation signal, the sixth step diode D6 is forward conducting and starts to store charges, under the action of the falling edge of the second excitation signal, the sixth step diode D6 is converted from the forward conducting state to the reverse cut-off state, and the charges stored in the sixth step diode D6 start to be rapidly released to form a reverse current spike. Due to the step change of the junction capacitance and the rapid change of the reverse current spike, rich harmonics, i.e. the second harmonic signal, are generated.

[0060] Figure 5is a schematic diagram of another comb spectrum generator provided by the embodiment of the utility model. On the basis of each of the above embodiments, optionally, referring to Figure 5 The even order splitting unit 151 comprises an input power divider 1511, a phase shifter 1512 and an attenuator 1513.

[0061] The input power divider 1511 is connected with the selection module 130, and the input power divider 1511 is further connected with the phase shifter 1512 and the attenuator 1513 respectively, the phase shifter 1512 is further connected with the first even order pulse generating unit 152, and the attenuator 1513 is further connected with the second even order pulse generating unit 153. The input power divider 1511 is used for splitting an input signal into a first split signal and a second split signal; the phase shifter 1512 is used for phase shifting the first split signal to obtain a first excitation signal; and the attenuator 1513 is used for reducing the amplitude of the second split signal to obtain a second excitation signal.

[0062] The utility model embodiment further provides an electronic device. Figure 6 is a schematic diagram of an electronic device provided by the embodiment of the utility model. Referring to Figure 6 The electronic device 10 comprises the comb spectrum generator 100 provided by any of the above embodiments.

[0063] Among them, the electronic device 10 provided by the embodiment has the beneficial effects of the comb spectrum generator 100 provided by any of the above embodiments, which will not be repeated here.

[0064] It should be understood that the various forms of flow shown above can be used to reorder, add or delete steps. For example, each step described in the utility model can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solutions of the utility model can be achieved, which will not be limited herein.

[0065] The above specific embodiments do not constitute a limitation on the protection scope of the utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A comb-shaped spectrum generator, characterized in that, include: Bias module, input matching module, selection module, odd-order comb spectrum generation module, even-order comb spectrum generation module, and output matching module; The bias module is connected to the input matching module, which is also connected to the selection module. The selection module is further connected to the odd-order comb spectrum generation module and the even-order comb spectrum generation module, respectively. Both the odd-order and even-order comb spectrum generation modules are connected to the output matching module. The odd-order comb spectrum generation module includes a first odd-order pulse generation unit, an odd-order intermediate matching unit, and a second odd-order pulse generation unit connected in sequence. Step diodes are provided in the first odd-order pulse generation unit, the second odd-order pulse generation unit, and the even-order comb spectrum generation module. The bias module is used to provide a bias voltage; the input matching module is used to perform impedance matching on the input signal; the selection module is used to control the input signal to be input to the odd-order comb spectrum generation module or the even-order comb spectrum generation module; The odd-order intermediate matching unit is used to perform impedance matching on the first odd-order pulse generating unit and the second odd-order pulse generating unit; the first odd-order pulse generating unit and the second odd-order pulse generating unit are used to generate odd-order harmonics; the even-order comb spectrum generating module is used to generate even-order harmonics; the output matching module is used to perform impedance matching on odd-order harmonics or even-order harmonics.

2. The comb spectrum generator according to claim 1, characterized in that, The first odd pulse generating unit includes: a first step diode and a second step diode; The anode of the first step diode is connected to the selection module, and the cathode of the first step diode is connected to the odd-order intermediate matching unit; the anode of the second step diode is connected to the cathode of the first step diode; and the cathode of the second step diode is connected to the anode of the first step diode.

3. The comb spectrum generator according to claim 1, characterized in that, The second odd pulse generating unit includes: a third step diode and a fourth step diode; The anode of the third step diode is connected to the odd-order intermediate matching unit, and the cathode of the third step diode is connected to the output matching module; the anode of the fourth step diode is connected to the cathode of the third step diode; and the cathode of the fourth step diode is connected to the anode of the third step diode.

4. The comb spectrum generator according to claim 1, characterized in that, The even-order comb spectrum generation module includes: an even-order splitting unit, a first even-order pulse generation unit, a second even-order pulse generation unit, and an even-order synthesis unit; The input terminal of the even-order splitting unit is connected to the selection module. The first output terminal and the second output terminal of the even-order splitting unit are respectively connected to the first even-order pulse generating unit and the second even-order pulse generating unit. The first even-order pulse generating unit is also connected to the even-order synthesis unit. The second even-order pulse generating unit is also connected to the even-order synthesis unit. The even-order synthesis unit is also connected to the output matching module. The even-order splitting unit is used to split the input signal into a first excitation signal and a second excitation signal with equal amplitude and opposite phase; the first even-order pulse generating unit is used to generate a first harmonic signal according to the first excitation signal; the second even-order pulse generating unit is used to generate a second harmonic signal according to the second excitation signal; the even-order synthesis unit is used to synthesize the first harmonic signal and the second harmonic signal to generate an even-order harmonic.

5. The comb spectrum generator according to claim 4, characterized in that, The first even-order pulse generating unit includes: a fifth step diode; The anode of the fifth step diode is connected to the even-order splitting unit, and the cathode of the fifth step diode is connected to the even-order combining unit. And / or, The second even-order pulse generating unit includes: a sixth-order step diode; The anode of the sixth step diode is connected to the even-order splitting unit, and the cathode of the sixth step diode is connected to the even-order combining unit.

6. The comb spectrum generator according to claim 4, characterized in that, The even-order splitting unit includes: a center-tap transformer.

7. The comb spectrum generator according to claim 4, characterized in that, The even-order splitting unit includes: an input power divider, a phase shifter, and an attenuator; The input power divider is connected to the selection module. The input power divider is also connected to the phase shifter and the attenuator. The phase shifter is also connected to the first even-order pulse generation unit, and the attenuator is also connected to the second even-order pulse generation unit. The input power divider is used to split the input signal into a first split signal and a second split signal; the phase shifter is used to shift the phase of the first split signal to obtain a first excitation signal; the attenuator is used to reduce the amplitude of the second split signal to obtain a second excitation signal.

8. The comb spectrum generator according to claim 4, characterized in that, The even-order synthesis unit includes an output power divider.

9. The comb spectrum generator according to any one of claims 1-8, characterized in that, The selection module includes a single-pole double-throw switch.

10. An electronic device, characterized in that, Includes the comb spectrum generator as described in any one of claims 1-9.

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