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Frequency agility synthesis method compatible with microwave large band width and mid-frequency small stepping and device thereof

A synthesis method and large-bandwidth technology, applied in the field of radar systems, can solve problems that are difficult to implement, and achieve the effect of optimizing technical indicators

Inactive Publication Date: 2014-03-12
中国兵器工业第二〇六研究所
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Problems solved by technology

[0008] The direct digital frequency synthesis technology is used in the synthesis of intermediate frequency small-step agile frequency signals. Since the frequency step to be generated is at the Hertz level, we know that when using DDS technology to generate frequency, it is necessary to change its phase register and frequency register. A group of frequencies must correspond to a group of frequency codes. When there are many output frequency points, a very large amount of data will be required. If the general method of decoding, storing and calling is used, it will be difficult to realize

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  • Frequency agility synthesis method compatible with microwave large band width and mid-frequency small stepping and device thereof
  • Frequency agility synthesis method compatible with microwave large band width and mid-frequency small stepping and device thereof
  • Frequency agility synthesis method compatible with microwave large band width and mid-frequency small stepping and device thereof

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Embodiment Construction

[0032]Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0033] ① Use the direct frequency analog rate synthesis method to synthesize M intermediate frequency frequency standard signals with a frequency interval of ΔF and a bandwidth of (M-1)ΔF, and the generated intermediate frequency frequency standard signal is F 1 , F 1 +ΔF, F 1 +2ΔF,...,F 1 +(M-1)ΔF;

[0034] ② Use the direct analog frequency synthesis method to generate N radio frequency standard signals with a frequency interval of ΔQ and a bandwidth of (N-1)ΔQ, where ΔQ should be an integer multiple of (M-1)ΔF, which can be determined according to specific system requirements specific settings;

[0035] ③Mix the intermediate frequency signal generated in ① and the RF frequency standard signal generated in ② to obtain a microwave signal with a step of ΔF;

[0036] ④ Double the frequency of the microwave signal with a step of ΔF generated in ① to generate a m...

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Abstract

The invention relates to a frequency agility synthesis method compatible with microwave large band width and mid-frequency small step and a device thereof. The invention is characterized in that direct simulation type frequency synthesis, direct digital frequency synthesis, and DSP(digital signal processor) technology are combined to perform frequency synthesis, so as to make the best of the advantages of the mentioned technologies, avoid technical defects, realize the optimization of all technical indexes of the frequency synthesizer, has a better expandability on the design of frequency band width and at the same time is compatible with large band width microwave frequency agility and mid-frequency small stepping frequency agility signal functions.

Description

technical field [0001] The invention belongs to the technical field of radar systems and is applied in the design of radar frequency synthesizers, in particular to an agile frequency synthesis method compatible with large microwave bandwidth and small intermediate frequency steps. Background technique [0002] Modern radars need to have strong electronic countermeasures performance, so as to have strong battlefield survivability. Not only does the radar need high precision, but it also requires its small size, light weight, and low power consumption. For the "heart" frequency synthesizer of the radar, its technical index requirements are also more "harsh". [0003] Direct analog frequency synthesis technology (Direct Frequency Synthesis) uses one or more different crystal oscillators as a reference signal source, and directly generates output signals of many discrete frequencies through frequency multiplication, frequency division, and frequency mixing. Its advantages are h...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/24G05B19/042
Inventor 张春荣席安安余铁军糜光璞
Owner 中国兵器工业第二〇六研究所
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