Low-phase noise frequency source

A low phase noise, frequency source technology, applied in the direction of automatic power control, electrical components, etc., can solve problems such as difficult to improve, achieve phase noise and spurious level improvement, low spurious, and ensure ultra-low phase noise indicators. Effect

Inactive Publication Date: 2016-05-04
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a frequency source with low phase noise to solve the problem that the phase noise index of the existing ultra-wideband and low spurious frequency source is difficult to improve

Method used

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Embodiment Construction

[0059] 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.

[0060] like figure 1 As shown, the frequency source of low phase noise provided by this embodiment includes: a low phase noise reference source, a DDS and a control module, a harmonic generation module and an output module;

[0061] The connection relationship of each module in the low phase noise frequency source provided by this embodiment is:

[0062] The two 400MHz signal output terminals of the low phase noise reference source are respectively connected to the signal input terminal of the DDS and the control module a...

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Abstract

The invention relates to a low-phase noise frequency source. The low-phase noise frequency source includes a low-phase noise reference source which sends low-phase noise 400MHz reference signals and low-phase noise 1000MHz reference signals to a DDS and control module and sends low-phase noise 400MHz excitation signals to a harmonic generation module, the DDS and control module which sends low-phase noise baseband signals to an output module and sends control signals to the output module and the harmonic generation module, the harmonic generation module which sends low-phase noise local vibration signals to the output module, and the output module which performs frequency mixing, filtering and frequency division on the baseband signals and the local vibration signals so as to obtain low-phase noise 5MHz-1000MHz signals which are adopted as output signals. The low-phase noise frequency source of the invention has the advantages of wide band, low stray degree, fine resolution and the like.

Description

technical field [0001] The invention relates to the technical field of frequency synthesis and frequency source phase noise performance. More particularly, it relates to a low phase noise frequency source. Background technique [0002] As a key index of the frequency source, the phase noise has a great influence on the performance of the whole system to which the frequency source is applied. For example, in a communication system, phase noise will decrease the signal-to-noise ratio of the channel and increase the bit error rate; in a radar system, phase noise will reduce the ability of the radar system to distinguish targets, that is, the improvement factor; It will increase the effective noise figure of the receiver. Therefore, the development of low phase noise frequency source has become an indispensable content. [0003] At present, frequency synthesis technology is basically divided into three categories: direct frequency synthesis, phase-locked frequency synthesis a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/085H03L7/18
CPCH03L7/085H03L7/18
Inventor 曹宇田云峰宋旸王心洋张波贾冒华王志巧仇冬梅盛东良李宏宇施学余李闯
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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