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0-18GHz ultra wide band frequency sweep source

A frequency-sweeping source and ultra-wideband technology, applied in the microwave field, can solve problems such as difficult to meet size requirements, complex structure, and structurally limited product size and cost.

Active Publication Date: 2020-10-02
WUXI HUACE ELECTRONICS SYST
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AI Technical Summary

Problems solved by technology

Since the frequency synthesis scheme is often very complex in structure and is limited by the size and cost of the product, ultra-wideband frequency sweep sources are not common at present. The common 0-18GHz frequency sweep sources often need to be divided into 0-2GHz, 2-6GHz, 6-12GHz, 12-18GHz multiple modules are processed separately, the structure is very complex, it is difficult to meet the size requirements

Method used

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  • 0-18GHz ultra wide band frequency sweep source
  • 0-18GHz ultra wide band frequency sweep source
  • 0-18GHz ultra wide band frequency sweep source

Examples

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Embodiment Construction

[0028] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0029] This application discloses a 0-18GHz ultra-wideband frequency sweep source, please refer to Figure 1-4 , including a reference source module, a first filtering module and a second filtering module.

[0030] In the reference source module, the output terminal of the 100MHz crystal oscillator is connected to the input terminal of the power divider and provides a 100MHz sine wave signal, and the four output terminals of the power divider are respectively connected to four internally integrated voltage-controlled oscillators (VCO) At the input end of the phase-locked loop (PLL), the power divider divides the power of the 100MHz sine wave signal into four channels and drives four PLLs respectively, namely PLL1, PLL2, PLL3 and PLL4. The output terminal of the first phase-locked loop PLL1 is connected to the input terminal of the signal ge...

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Abstract

The invention discloses a 0-18 GHz ultra wide band frequency sweep source and relates to the technical field of microwave. The 0-18 GHz ultra wide band frequency sweep source comprises a reference source module, a first filtering module and a second filtering module, wherein the reference source module generates any point frequency or linear frequency modulation signal of 0-1.4 GHz by using a high-speed DDS technology, and uses an ultra-wideband low-noise PLL technology integrated with a VCO generating a 8.6-15GHz ultra-wideband frequency hopping high local oscillation signal with low phase noise and low stray and other y point frequency local oscillation and excitation signals. Compared with a direct synthesis technology, the frequency sweep source has the advantages that the size can beeffectively reduced, through careful design of a frequency conversion scheme and application of two filtering modules to a broadband switch filtering technology, the frequency sweep source can achieveultra wide band through a simplified structure, and the size requirement is met while the performance index is met.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a 0-18GHz ultra-wideband frequency sweeping source. Background technique [0002] The frequency source is the signal generation source of the radar system, which provides local oscillator signals and emission excitation signals for the radar, and is known as the "heart" of the radar system. After years of research and development, my country has made great breakthroughs in frequency synthesis technology. With the upgrading of PLL and DDS technology, the achievable bandwidth is getting wider and the product size is getting smaller and smaller. [0003] The technical principle of the sweeping frequency source is similar to that of the frequency source, and both require the flexible use of frequency synthesis technology, but there are also significant differences. According to the existing technology, an ultra-wideband PLL can generate any point frequency signal from 0 to 15GHz, ...

Claims

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Application Information

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IPC IPC(8): H03H9/25G01S7/282G01S7/35
CPCH03H9/25G01S7/282G01S7/35
Inventor 宋剑威蒋晔周涵奇朱培培
Owner WUXI HUACE ELECTRONICS SYST
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