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Radar pulse modulator

A radar pulse and modulator technology, applied in the field of high-voltage pulse devices, can solve the problems such as the inability to flexibly control the pulse amplitude, pulse width and waveform repetition frequency value, poor stability, etc., so as to suppress co-frequency interference and ensure stability. , the effect of fast switching speed

Inactive Publication Date: 2010-01-27
杨大宁
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this modulator is that the amplitude, pulse width, waveform, and repetition frequency of the pulse cannot be flexibly controlled, and the stability is relatively poor.

Method used

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Examples

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Embodiment Construction

[0018] like figure 1 As shown, the signal receiving module 1 is connected to the serial interface circuit 2 through RS422, the serial interface circuit 2 is connected to the pulse generator 3, the pulse signal generated by the pulse generator 3 is output to the push circuit 4, and the output of the pulse generator 3 is respectively connected to Two groups of driving circuits, namely the first driving circuit 4-1 and the second driving circuit 4-2, the outputs of these two groups of driving circuits are respectively connected to the pulse transformer 5, and the pulse transformer 5 generates a high-voltage trigger pulse 6 through coupling.

[0019] like figure 2 , the signal receiving module 1 includes a control signal generator 11 and a control signal connector 12 . The serial interface circuit 2 includes a clock 21 and a UART chip 22 (UART: Universal Asynchronous Receiver / Transmitter, a universal asynchronous receiving / sending device, which is an input and output chip for pa...

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Abstract

The invention discloses a radar pulse modulator for modulating direct-current high voltage into various time intervals and various frequencies. A signal receiving module is connected with a pulse generator through a serial interface circuit, the output of the pulse generator is respectively connected with a first driving circuit and a second driving circuit, the outputs of the first driving circuit and the second driving circuit are respectively connected to the primary coil end of a pulse transformer, the outputs of high-voltage power supplies of the first driving circuit and the second driving circuit are respectively connected with an MOSFET branch module and an IGBT branch module, and the MOSFET branch module and the IGBT branch module are in parallel connected and then connected with the input of a branch switching controller; and an FPGA chip of the pulse generator is respectively and externally connected with a parallel output interface, a parallel input interface, a program memory, a switching control switch and a trigger pulse switch. The radar pulse modulator can conveniently control the preheating time of a transmitter, the pulse widths and the repetition frequencies of trigger pulse, restrain the same frequency interference, and obtain better wave forms during a high voltage modulating process; in addition, the driving circuits have faster on-off speed and higher voltage and power capacity.

Description

technical field [0001] The invention relates to a high-voltage pulse device for modulating DC high-voltage voltage into various time intervals and frequencies, and is especially used in radar transmitters. Background technique [0002] The pulse modulator is the main part of the radar transmitter that works in pulse mode. The parameters of the trigger pulse amplitude, pulse width, waveform and repetition frequency value generated by the pulse modulator directly determine the power of the radar transmitter. It determines the distance of radar observation distance, radar observation azimuth and distance resolution, and the quality of radar image. Therefore, the performance of pulse modulator has a decisive effect on the performance of radar transmitter and even the whole radar machine. [0003] The traditional pulse modulator is a linear modulator with an artificial wire as an energy storage and pulse shaping device and a deuterium-filled thyratron as a switch. The disadvanta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/282
Inventor 杨大宁
Owner 杨大宁
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