Broadband output power adjustable composite modulation signal source

Abstract

The utility model relates to a composite modulation signal source with adjustable broadband output power, which comprises a sectional broadband voltage-controlled oscillator, the input end of the sectional broadband voltage-controlled oscillator receives a frequency modulation control signal and a frequency band selection control signal, and the output end of the sectional broadband voltage-controlled oscillator is connected with the input end of a phase modulation circuit. The output end of the phase modulation circuit is connected with the input end of the numerical control attenuator, the output end of the numerical control attenuator is connected with the input end of the amplifier, and the output end of the amplifier outputs a composite modulation signal; the phase modulation circuit receives a phase modulation control signal. The composite modulation signal source provided by the utility model is wide in frequency band and adjustable in output power, and the universal performance of a product is improved.

Description

Technical Field

[0001] The utility model relates to a broadband output power adjustable composite modulation signal source, belonging to the fields of radar systems, signal sources, test systems, and anti-jamming systems, mainly used in radar and anti-jamming systems, and specifically relates to a broadband output power adjustable composite modulation signal source. Background Art

[0002] A composite modulation signal refers to a signal source obtained by modulating a signal using two or more modulation methods, which plays an important role in modern radar systems. The composite modulation signal source has higher ranging accuracy and anti-jamming ability. In radar and anti-jamming systems, the composite modulation signal source is limited by the narrow bandwidth of the low-phase-noise voltage-controlled oscillator, and the output power of the general composite modulation signal source is fixed and non-adjustable. Facing systems with different frequency and power requirements, the versatility is poor. Existing ordinary composite modulation signal sources cannot meet the above requirements simultaneously. Content of the Utility Model

[0003] The purpose of the utility model is to provide a composite modulation signal source that simultaneously satisfies wide bandwidth and adjustable output power, and a broadband output power adjustable composite modulation signal source with high general performance.

[0004] The technical solution of the utility model:

[0005] A broadband output power adjustable composite modulation signal source includes a segmented broadband voltage-controlled oscillator. The input end of the segmented broadband voltage-controlled oscillator receives a frequency modulation control signal and a frequency band selection control signal. The output end of the segmented broadband voltage-controlled oscillator is connected to the input end of a phase modulation circuit. The output end of the phase modulation circuit is connected to the input end of a digital control attenuator. The output end of the digital control attenuator is connected to the input end of an amplifier. The output end of the amplifier outputs a composite modulation signal; the phase modulation circuit receives a phase modulation control signal.

[0006] Preferably, the segmented broadband voltage-controlled oscillator includes a frequency modulation control port. The input end of the frequency modulation control port receives a frequency modulation control signal. The output end of the frequency modulation control port is connected to the input end of a narrowband voltage-controlled oscillator. The output end of the narrowband voltage-controlled oscillator is connected to the input end of a frequency band selection switch. The output end of the frequency band selection switch outputs a frequency. The frequency band selection switch receives a frequency band selection control signal.

[0007] Preferably, there are seven narrowband voltage-controlled oscillators, namely narrowband voltage-controlled oscillator one, narrowband voltage-controlled oscillator two, narrowband voltage-controlled oscillator three, narrowband voltage-controlled oscillator four, narrowband voltage-controlled oscillator five, narrowband voltage-controlled oscillator six, and narrowband voltage-controlled oscillator seven. The seven narrowband voltage-controlled oscillators are arranged in parallel.

[0008] Preferably, a power supply supplies power to the segmented broadband voltage-controlled oscillator.

[0009] Preferably, the frequency band selection control signal is output from the output terminal of the single-chip microcomputer, and the input terminal of the single-chip microcomputer is connected to an external control.

[0010] Preferably, the power supply powers the single-chip microcomputer.

[0011] Advantages of the present utility model:

[0012] The present utility model provides a wideband composite modulation signal source with adjustable output power, improving the general performance of the product.

[0013] In view of the poor phase noise of traditional wideband voltage-controlled oscillators, only narrowband voltage-controlled oscillators can be used in composite modulation signal sources to achieve better signal phase noise. Therefore, there are certain limitations in the frequency bandwidth. The product of the present utility model uses a segmented wideband voltage-controlled oscillator. The required frequency band is selected through frequency band selection control. In actual operation, the voltage-controlled oscillator operates as a narrowband voltage-controlled oscillator in the selected frequency band. In this way, better phase noise and frequency bandwidth can be taken into account, and corresponding frequencies can be generated according to system requirements, having better frequency adaptability. In addition, the output signal level of traditional composite modulation signal sources is low and fixed, so they cannot adapt to different application scenarios. The product of the present utility model uses a combination of a digital control attenuator and an amplifier, enabling the product to output appropriate power according to application requirements. In view of the above improvements, the product of the present utility model can be used as a general composite modulation signal source in different systems. Description of the drawings

[0014] Figure 1 It is a schematic structural principle diagram of the present utility model.

[0015] Figure 2 It is a schematic structural principle diagram of the segmented wideband voltage-controlled oscillator of the present utility model.

[0016] Figure 3 It is a schematic principle diagram of the generation of the frequency band selection control signal of the present utility model. Detailed implementation manners

[0017] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following is a detailed description of the specific implementation manners, structures, features, and their effects of the present utility model in combination with the Figures 1-3 drawings and preferred embodiments.

[0018] Such as Figures 1-3As shown in the figure, a broadband output power adjustable composite modulation signal source includes a segmented broadband voltage-controlled oscillator. The segmented broadband voltage-controlled oscillator includes a frequency modulation control port. The input end of the frequency modulation control port receives a frequency modulation control signal, and the output end of the frequency modulation control port is connected to the input end of a narrowband voltage-controlled oscillator. The output end of the narrowband voltage-controlled oscillator is connected to the input end of a frequency band selection switch. The output end of the frequency band selection switch outputs a frequency. The frequency band selection switch receives a frequency band selection control signal. There are seven narrowband voltage-controlled oscillators, namely narrowband voltage-controlled oscillator one, narrowband voltage-controlled oscillator two, narrowband voltage-controlled oscillator three, narrowband voltage-controlled oscillator four, narrowband voltage-controlled oscillator five, narrowband voltage-controlled oscillator six, and narrowband voltage-controlled oscillator seven. The seven narrowband voltage-controlled oscillators are arranged in parallel, and the power supply supplies power to the segmented broadband voltage-controlled oscillator. The input end of the segmented broadband voltage-controlled oscillator receives a frequency modulation control signal and a frequency band selection control signal. The frequency band selection control signal is output from the output end of a single-chip microcomputer. The input end of the single-chip microcomputer is connected to an external control, and the power supply supplies power to the single-chip microcomputer. The output end of the segmented broadband voltage-controlled oscillator is connected to the input end of a phase modulation circuit. The output end of the phase modulation circuit is connected to the input end of a numerically controlled attenuator. The output end of the numerically controlled attenuator is connected to the input end of an amplifier. The output end of the amplifier outputs a composite modulation signal. The phase modulation circuit receives a phase modulation control signal.

[0019] Different narrowband voltage-controlled oscillators can be selected through frequency band selection control. The frequency range of narrowband voltage-controlled oscillator one is: 7500 MHz to 8600 MHz; the frequency range of narrowband voltage-controlled oscillator two is: 8600 MHz to 9800 MHz; the frequency range of narrowband voltage-controlled oscillator three is: 9800 MHz to 10800 MHz; the frequency range of narrowband voltage-controlled oscillator four is: 10800 MHz to 12000 MHz; the frequency range of narrowband voltage-controlled oscillator five is: 12000 MHz to 12900 MHz; the frequency range of narrowband voltage-controlled oscillator six is: 12900 MHz to 13900 MHz; the frequency range of narrowband voltage-controlled oscillator seven is: 13900 MHz to 15000 MHz. By selecting different narrowband voltage-controlled oscillators, the output frequency can be arbitrarily selected within the frequency range of each narrowband voltage-controlled oscillator. The broadband output of the frequency is realized to meet the application systems with different frequency requirements. The output signal is frequency-modulated by the frequency modulation control signal and then given to the subsequent phase modulation circuit. After the signal is phase-modulated, the power is adjusted by the numerically controlled attenuator to meet the application systems with different power requirements; and then the final composite modulation signal is output after passing through the amplifier. The product of the present utility model uses a combination of a numerically controlled attenuator and an amplifier, so that the product can output an appropriate power according to application needs. In view of the above improvements, the product of the present utility model can be used as a general composite modulation signal source and applied to different systems.

[0020] The above are only the preferred embodiments of the present utility model, and do not impose any formal limitations on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A broadband output power adjustable composite modulation signal source, characterized in that, It includes a segmented wideband voltage-controlled oscillator. The input end of the segmented wideband voltage-controlled oscillator receives a frequency modulation control signal and a frequency band selection control signal. The output end of the segmented wideband voltage-controlled oscillator is connected to the input end of a phase modulation circuit. The output end of the phase modulation circuit is connected to the input end of a numerically controlled attenuator. The output end of the numerically controlled attenuator is connected to the input end of an amplifier. The output end of the amplifier outputs a composite modulation signal. The phase modulation circuit receives a phase modulation control signal.

2. The broadband output power adjustable composite modulation signal source according to claim 1, characterized in that, The segmented wideband voltage-controlled oscillator includes a frequency modulation control port. The input end of the frequency modulation control port receives a frequency modulation control signal. The output end of the frequency modulation control port is connected to the input end of a narrowband voltage-controlled oscillator. The output end of the narrowband voltage-controlled oscillator is connected to the input end of a frequency band selection switch. The output end of the frequency band selection switch outputs a frequency. The frequency band selection switch receives a frequency band selection control signal.

3. The broadband output power adjustable composite modulation signal source according to claim 2, characterized in that, There are seven narrowband voltage-controlled oscillators, namely narrowband voltage-controlled oscillator one, narrowband voltage-controlled oscillator two, narrowband voltage-controlled oscillator three, narrowband voltage-controlled oscillator four, narrowband voltage-controlled oscillator five, narrowband voltage-controlled oscillator six, and narrowband voltage-controlled oscillator seven. The seven narrowband voltage-controlled oscillators are arranged in parallel.

4. A broadband output power adjustable composite modulation signal source according to claim 2, characterized in that, The power supply powers the segmented wideband voltage-controlled oscillator.

5. A broadband output power adjustable composite modulation signal source according to claim 1, characterized in that The frequency band selection control signal is output from the output end of a single-chip microcomputer. The input end of the single-chip microcomputer is connected to an external control.

6. The broadband output power adjustable composite modulation signal source according to claim 5, characterized in that The power supply powers the single-chip microcomputer.

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