Direct Digital Synthesizer (DDS) has the advantages of high frequency resolution, rapid frequency change rate and low phase noise.
直接数字频率合成器dds具有极高的分辨率、频率转换速度快、相位噪声低等优点。
A broadband, high resolution and low phase noise frequency synthesizer used in electronic detection and electronic countermeasure system is described in detail.
详细介绍了一种用于电子侦察与对抗系统中的宽带、高分辨率、低相位噪声频率合成器。
A design method for low phase noise agile X-band frequency synthesizer is presented, the theoretic analysis and calculation is performed and the test results are given.
介绍一种低相噪、捷变频x波段频率综合器设计方法，并进行理论分析、计算，最后给出测试结果。
The paper presents a fast agile frequency synthesizer of low spurious, low phase noise.
系统地介绍了一种低杂散、低相位噪声、快速捷变频频率合成器的实现途径。
Through comprehensive measurement of the frequency synthesizer, It shows that this synthesizer has good performance of the phase noise and spur restraint.
通过对频率合成器性能指标的测试，该频率合成器具有较好的相位噪声和杂散抑制性能。
The synthesizer has a good performance thanks to harmonic phase locking technology and double feedback phase locking technology.
该合成器采用谐波锁相和双反馈锁相技术，性能优良。
Frequency synthesizer is a core component of the radar system, the phase noise and spur levels have a direct impact on the excellent performance of radar systems.
作为雷达核心部件的频率合成器，其相位噪声和杂散性能的优异直接影响雷达系统的性能。
Based on the frequency-domain model of synthesizer, the method can accurately predict the phase noise of the divider and its influence to the phase noise of synthesizer.
这种方法基于频率综合器的频域模型，能比较准确地预测分频器的相位噪声和它对整个频率综合器相位噪声的影响。
A new phase noise estimate method for millimeter wave double PLL frequency synthesizer is presented.
提出了一种新的毫米波双环锁相源相位噪声估测方法。
The basic working principle and the crucial parameters of phase locked synthesizer are introduced in this paper.
介绍了锁相式频率合成器的工作原理以及频率合成器关键的性能指标。
Particularly critical is the phase noise of the 1st LO, the synthesizer, which we need to tune our receiver.
尤其关键的是第一个本振的相位噪声，我们需要调谐我们接收机的合成器。
Regenerative dividers play an important role in frequency synthesizer with its low phase noise.
再生分频器以其优越的相位噪声性能，在频率合成中有着重要作用。
This paper presents a low phase noise indirect frequency synthesizer, which used in airborne fire control radar and is required to operate in a very harsh environment.
提出了一种间接合成的低相位噪声频率综合器的设计，该频综器用于某机载雷达中，从而要求其在极其恶劣的环境中同样具有良好的性能。
An approach of a low spurious, low phase noise, agile frequency synthesizer was presented.
研究一种跳频通信机低杂散、低相噪快速捷变频率合成器的实现途径。
A combined tuning technique of digital tuning and analog tuning is used to improve the phase noise of frequency synthesizer by decreasing the gain of VCO.
该频率综合器采用模拟调谐和数字调谐相结合的技术来提高相位噪声性能。
In the paper it was studied that the frequency synthesizer and multiplier and the phase modulation circuit of the rubidium atomic frequency standards (RAFS).
本论文重点是研究被动型铷原子频标中的调制电路、频率合成电路和倍频电路。
The phase-locked loop frequency synthesizer is a kind of phase lock installment and it is a kind of separate gap frequency code generator with high stability frequency.
锁相环频率合成器是一种相位锁定装置，是一种频率稳定度较高的离散间隔型频率信号发生器。
A novel method to develop a frequency synthesizer with wide frequency coverage, fast frequency switching speed, and low phase noise is proposed.
提出了一种宽相对覆盖、低相位噪声的捷变频频率合成方法。
A method to realize a wide frequency-coverage frequency synthesizer with low spurious level and low phase noise level is proposed in this paper.
提出了一种实现宽覆盖、低相位噪声、低杂散的频率合成方法。
In this scheme, the synthesizer contains a low-noise phase detector to achieve the performance of low phase noise and low spur level.
本方案采用了低底噪鉴相器，实现低相噪和低杂散指标。
The hardware constitution of a low phase noise frequency synthesizer using AD9854 and the measured performances of system phase noise and spurious spectrum are presented.
给出了采用AD985 4芯片构成的低相噪频率综合源的硬件组成以及系统实测的相位噪声、杂散技术指标。
Design a synthesizer based on DDS, whose characteristics are fast frequency change speed, high resolution and low phase noise et al.
并以DDS为核心设计了接收机的细扫本振，该本振具有变频速度快、分辨率高、相噪指标高等特点。
Using the method and formula above, a L-band synthesizer has been finished. It has satisfactory performance on phase noise, frequency jump speed and spur rejection.
该跳频源在相位噪声、调频速度和杂散抑制等方面的性能指标较高。
The invention relates to a double-loop frequency synthesizer and a phase noise analyzing method.
一种双环路频率综合器及其相位噪声分析方法。
The phase locked loop (PLL) frequency synthesizer for digital tuning system(DTS), which is used in DTS of car radio receiver, is presented.
针对一个汽车音响收音数字调谐系统的实例，介绍了一种广播用双波段锁相环频率合成芯片的设计方法。
This paper gives a computer simulation for chaos phenomena of sampling phase-detection frequency synthesizer.
对锯齿形取样鉴相频率合成器中的混沌现象进行了计算机模拟。
In the electronic instrumentation aspect, the phase-locked loop in instruments and so on in frequency synthesizer and phase meter played the vital role.
在电子仪器方面，锁相环在频率合成器和相位计等仪器中起了重要作用。
Modern wireless communication requires that the frequency synthesizer should have fast settling time, small channel width and low phase noise.
现代无线通信要求频率综合器同时满足快速切换时间，小信道宽度和低噪声性能三方面的要求。
Therefore, the frequency synthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phase lock frequency synthesis, based on specific integrated circuit.
广泛采用的直接数字式频率合成方法，却面临输出频率上限难以提高和输出杂散的难以抑制两个难题。
Therefore, the frequency synthesizer works in millimeter wave band is mostly designed and realized by the way of indirect phase lock frequency synthesis, based on specific integrated circuit.
广泛采用的直接数字式频率合成方法，却面临输出频率上限难以提高和输出杂散的难以抑制两个难题。
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