Frequency Synthesizer (FS) is a very important block, which is used in a wireless transceiver as a local oscillator for frequency translation and channel selection.
频率合成器是射频收发机中非常重要的模块，是用于频率转换和频道选择的本地振荡源。
Single frequency source is usually used as local oscillator in communication system and radar system, also as a reference clock in digital circuits, so it is a extensive-applied technique.
固定频率源可以在在通讯系统和雷达系统中作为本机振荡器，也可以作为数字电路的基准时钟信号，因此得到了广泛的应用。
The polarization direction of signal is required to match with that of local oscillator.
在相干光通信等方面，要求信号光与本地振荡光偏振方向相匹配。
The' main factors resulting in local frequency tracking error are analyzed based on the principles of the tracking local oscillator for frequency agile radars of rotary tuning magnetron type.
本文从旋转变频磁控管式频率捷变雷达的本振频率跟踪原理出发，分析了产生本振频率跟踪误差的主要因素。
The author's main work is the development of the lo (local oscillator) in DTV transmitter, it is one of the important research projects planned by Shanghai Mingzhu Company.
作者的主要工作就是设计数字电视发射机中的本振频率源，这是上海明珠公司数字电视发射机开发项目的一个重要部分。
Still further, a controller may be coupled to receive a control signalcorresponding to a variable impedance level, and control a local oscillator coupled to the mixer responsive to the control signal.
更进一步，控制器可以被耦合以接收对应于可变阻抗位准的控制信号，并响应于所述控制信 号来控制耦合到混频器的本机振荡器。
Millimeter Wave (MMW) mixer is one of the most key equipment of many MMW systems, however it is difficult and high costed to research on MMW local oscillator with low phase noise.
毫米波混频器是许多毫米波系统的关键部件之一，而研制低相噪毫米波本振源比较困难且成本较高，毫米波谐波混频器正是解决这一难题的有效途径。
In modern radar and communication system, phase noise of local oscillator (lo) becomes a vital factor of system performance.
在现代雷达和通讯系统中，本振相位噪声越来越成为决定系统性能的关键因素。
The phase detecting error caused by local oscillator frequency drift and non-synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time.
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差，同时提高了测量速度。
This paper discusses the influence of mixer on the phase lock-loop (PLL) circuit of a local oscillator. In mixer, local signal is produced by the PLL circuit.
本文讨论了采用锁相环路作为本振信号的混频器对本振锁相环路的影响。
Bases on the IIFM technique, the principle and method to measure the local oscillator tracking accuracy of frequency - agile radar is put forward in this paper.
在介绍瞬时中频测试技术的基础上，介绍利用瞬时中频测试技术对捷变频雷达本振跟踪精度进行测试的原理和方法。
This oscillator has been successfully used in solid state FM-CW radar system, microwave scatterometer, FM-jamming stations and frequency-agile local oscillator.
该固态源已成功地应用于FM - CW雷达、微波散射计、噪声调频干扰信号源、捷变本振源等方面。
The former determines the frequency range which should be revised by the hot tracking circuit, while the later is the final frequency error of the local oscillator.
同时也提出了热跟踪后本振频率跟踪误差项。分析前者，可以决定热跟踪电路应予修正的频率范围，而后者则是跟踪本振最终的误差。
This paper introduces a method to realize frequency control of a noncoherent frequency-agility adaptive radar by using frequency setting and waiting, digital local oscillator and micro-processor.
介绍了采用置频等待、数字本振及微处理机技术实现非相参捷变频自适应雷达频率控制的方法。
Therefore it satisfies operating requirements for time-frequency system and high-stability local oscillator, and has good application prospects.
因此比较好的满足了时频系统，特别是高稳定本振系统的使用要求，而且有着良好的应用前景。
The mixing efficiency in coherent lidar of an Airy signal field with a Gaussian local-oscillator(LO) is discussed with the consideration of the effect of wavefront matching of both fields.
相干激光雷达接收机中，信号光为平面光经衍射形成的艾里斑，本振光为基模高斯光束，在文章中对两者在探测器光敏面上混频的混频效率进行了讨论。
Synthesizer is an important block in the receiver whose performance is directly related to the accuracy and purity of the local oscillator signals (lo).
频率合成器是作为接收机中的重要模块，它的性能指标直接决定了本振信号(LO)的精度和纯度。
According to this method all the DDS output frequencies have no phase truncation noise, so the phase noise of the tuner local oscillator is greatly (improved.)
应用该方法可使其在所用频率点上无相位截断噪声，从而使调谐器本振的相位噪声大大改善。
To gain lower phase noise of local oscillator, the design work of circuit is carried out based on the analyse of the key factors that affect the phase noise level.
为获得更低的相位噪声，在对影响本振相噪关键因素分析的基础上进行电路的设计。
To gain lower phase noise of local oscillator, the design work of circuit is carried out based on the analyse of the key factors that affect the phase noise level.
为获得更低的相位噪声，在对影响本振相噪关键因素分析的基础上进行电路的设计。
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