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Ultra-wideband swept-frequency signal generating device

A technology of sweeping frequency signal and generating device, which is applied in measurement devices, reflection/re-radiation of radio waves, utilization of re-radiation, etc. Bandwidth effect

Pending Publication Date: 2018-04-20
北方通用电子集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The frequency source of the traditional L-band radar uses a direct frequency synthesizer to obtain a sweep signal, and its bandwidth and linearity are difficult to meet the requirements of developing a high-range resolution radar

Method used

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  • Ultra-wideband swept-frequency signal generating device

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Embodiment Construction

[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0024] As an aspect of the present invention, an ultra-wideband frequency sweep signal generator is provided, wherein, such as figure 1 As shown, the ultra-wideband sweep signal generator 10 includes: FPGA circuit 110, DAC digital-to-analog conversion circuit 120, filter and addition circuit 130, voltage-controlled oscillation circuit 140, frequency synthesis circuit 150 and frequency mixing circuit 160;

[0025] The output end of the FPGA circuit 110 is connected to the input end of the DAC digital-to-analog conversion circuit 120, and the FPGA circuit 110 is used to output the generated digital signal to the DAC digital-to-analog conversion circuit 120;

[00...

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Abstract

The invention discloses an ultra-wideband swept-frequency signal generating device comprising an FPGA circuit, a DAC digital-analog converting circuit, a filtering and adding circuit, a voltage-controlled oscillating circuit, a frequency synthesizing circuit and a mixing circuit. The output terminal of the FPGA circuit is connected with the input terminal of the DAC digital-analog converting circuit; the output terminal of the DAC digital-analog converting circuit is connected with the input terminal of the filtering and adding circuit; the output terminal of the filtering and adding circuit is connected to the input terminal of the voltage-controlled oscillating circuit; the output terminal of the voltage-controlled oscillating circuit is connected with a first input terminal of the mixing circuit; and the input terminal of the frequency synthesizing circuit is connected with the output terminal of the FPGA circuit. The mixing circuit is used for mixing a local oscillator signal and an S-band swept-frequency signal to obtain an initial L-band ultra-wideband swept-frequency signal and outputting the initial L-band ultra-wideband swept-frequency signal. According to the invention, the initial L-band ultra-wideband swept-frequency signal generated by the device has advantages of high linearity and wide signal bandwidth.

Description

technical field [0001] The invention relates to the technical field of signal generating devices, in particular to an ultra-wideband frequency sweep signal generating device. Background technique [0002] With the development of modern radar technology, in order to achieve higher range resolution, it is necessary to ensure that the radar has a larger emission bandwidth. The frequency source of the traditional L-band radar uses a direct frequency synthesizer to obtain the swept frequency signal, and its bandwidth and linearity are difficult to meet the requirements of the development of high-range resolution radar. [0003] Therefore, how to improve the linearity and signal bandwidth of the L-band frequency sweep signal has become a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0004] The present invention aims to solve at least one of the technical problems in the prior art, and provides an ultra-wideband sweep signal gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/03G01S13/02H03L7/12H03L7/10
CPCH03L7/103H03L7/12G01S7/03G01S13/0209
Inventor 雷雨婷丁艳杰王梅香韩寅冬孙鹏裴志新周昕
Owner 北方通用电子集团有限公司
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