English translation for "本振频率"

local frequency

Example Sentences:

	1.	The sub - harmonic mixer is used as unit mixer to reduce lo to its 1 / 4 此镜频抑制混频器采用谐波混频器作为单元混频器,将本振频率降低为基频的1 / 4 。
	2.	Select installation and then antenna setting , and set respectively the local oscillator frequencies of the high - frequency tuner of 146 , 138ku , 138c band and so on 选择安装里的天线设定，分别设置146 、 138ku及138c波段等等的高频头本振频率。
	3.	This problem could be resolved by using sub - harmonic mixer ( shm ) . instead of using mmw lo , shm using microwave signal with frequency equals 1 / 2 or 1 / 4 of mmw lo frequency , thus the technical difficulty and cost of mmw system is reduced remarkably 采用亚谐波混频器( sub - harmonicmixer )可将本振频率降为基波频率的1 / 2或1 / 4 ,从而克服了直接采用毫米波本振源带来的困难,降低了射频接收机的技术难度和系统成本。
	4.	Mixers are the key components of many microwave and millimeter - wave systems . the super - heterodyne receiver is always applied in modern communication system , mixer becomes the key component as is at the first part of system . but it is more and more difficult to get the choiceness lo source of the same band with the system is working at high frequency especially in the millimeter - wave . sub - harmonic mixer is a good solution to this problem now . in this circuit we need just half 、 quarter 、 even 1 / 8 of the rf signal frequency . in this paper the design and fabricate of sub - harmonic hmic mixers ( 2 , 4 ) at w - band are introduced 混频器是微波通信、射电天文学、雷达、等离子物理、遥控、遥感、电子对抗,以及许多微波测量系统中至关重要的部件。在现代通信系统中,毫米波频段通常采用超外差接收机,混频器作为第一级就成为关键部件。由于在毫米波频段,同频段高性能的本振源成本高,技术难度大,采用分谐波混频技术是解决此问题的有效途径,只需射频频率1 / 2 、 1 / 4甚至1 / 8的本振频率即可实现混频。
	5.	Intermodulation suppression for fh ( frequency hopping ) receiver is designed by selecting the intermediate frequencies and changing group of filters , local oscillation ( lo ) frequency , bandwidth of lo frequency under the condition that receiver configuration , sensitivity , dynamic range , instantaneous bandwidth and precision of frequency measurement are fixed 摘要针对跳频接收机的体制和灵敏度、动态范围、瞬时工作带宽、测频精度等设计参数，通过改变预选器组成、本振频率和本振带宽，分析接收信道的中频选取原则，以实现跳频接收机的互调抑制设计。
	6.	Based on the results of the theory analysis and computer simulation of suspended stripline low pass filter , band pass filter , the transition from waveguide to finline and the transition from waveguide to suspended stripline , the structure design and manufacture were made . the measured results match the requirement . different from the traditional mixers used in the domestic communications satellites , the sub - harmonic balance mixer type was used in the ka - band mixer design 在ka频段混频器的研究过程中，通过对卫星和飞船所用到的混频器进行研究，在对ka波段的传统射频前端电路的分析基础上，提出改变以往星上传统的基波混频方案，采取了次谐波混频方案，降低了本振频率，简化了本振链路，使噪声特性、可靠性获得改善。
	7.	It mainly includes two parts : the frequency offset caused by the difference of the mobile equipment ’ s transmitting frequency and the nodeb ’ s receiving frequency ; the frequency offset caused by the vehicle of the mobile equipment , which is called doppler shift . accurate frequency offset estimation and compensation is of importance for demodulation 它主要由两部分构成:由于nodeb (基站)和移动台晶振本振频率的不同而产生频偏;由于移动台运动产生多普勒效应,引起的多普勒频偏,在信号功率谱上表现为多普勒频谱扩展(以后简称多普勒扩展) 。

Similar Words：

"本震" English translation, "本振" English translation, "本振混频第一检波器" English translation, "本振混频器" English translation, "本振滤波器" English translation, "本振频率是5" English translation, "本振谐波干扰" English translation, "本镇量" English translation, "本阵" English translation, "本阵杀人事件" English translation