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Fine stepping frequency source with continuous phase

A frequency source and fine stepping technology, applied in the field of frequency source, can solve problems such as phase continuity, and achieve the effect of solving phase discontinuity, low spurious and low phase noise indicators

Active Publication Date: 2018-12-28
BEIJING INST OF RADIO MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the phase continuity problem after signal switching, the present invention adopts the following technical solutions:

Method used

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  • Fine stepping frequency source with continuous phase

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Embodiment Construction

[0032] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0033] like figure 1 As shown, a phase-continuous fine-step frequency source 14 includes: an amplification power division unit 1 , a DDS unit 2 and a selective amplification unit 3 . In this embodiment, the amplification power division unit 1 performs power amplification and power distribution on the external reference signal to obtain five reference clock signals; the DDS unit 2 uses the reference clock signal to generate five radio frequency signals; the switch The amplifying unit 3 switches and amplifies five radio fre...

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Abstract

The invention discloses a fine stepping frequency source with a continuous phase. The frequency source comprises an amplification power dividing unit, a DDS unit and a switch amplification unit; the amplification power dividing unit is used for carrying out power amplification and power distribution on an external reference signal, so as to obtain a plurality of paths of reference clock signals; the DDS unit uses each reference clock signal for generating a path of radio frequency signal corresponding to the reference clock signal; and the switch amplification unit is used for performing switch selection and amplification on each path of radio frequency signals, and outputting a fine stepping signal. According to the fine stepping frequency source with the continuous phase provided by theinvention, the amplification power dividing unit, the multi-path DDS unit and the switch are arranged, so that the problem of phase continuity after signal switching can be solved.

Description

technical field [0001] The present application relates to the field of frequency sources, in particular to a phase-continuous fine-step frequency source. Background technique [0002] The frequency source is the core component of the radar system. Its function is to generate various frequency signals for the radar system. The performance of the frequency source directly determines the power of the radar system. The frequency source is realized by frequency synthesis technology, and there are three basic methods: direct frequency synthesis, indirect frequency synthesis (PLL) and direct digital frequency synthesis (DDS). Because DDS has the advantages of high frequency resolution, fast frequency point conversion speed, and low phase noise, the fine step frequency source is generally realized by DDS technology. [0003] The electronic environment of the modern battlefield is complex, which puts forward higher and higher requirements for the anti-jamming ability of the radar sy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/28
CPCG01S7/28
Inventor 侯德州
Owner BEIJING INST OF RADIO MEASUREMENT
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