低噪声、高线性度的射频前端设计是整个射频接收机系统电路设计中的关键。
Low noise, high linearity RF front end circuit is the key of the whole RF receiver system design.
介绍了一种应用于C波段接收机射频前端，并利用耦合微带线设计的射频滤波器。
An RF fitter, which is applied to C-band receiver RF front and designed with the coupling micros - trip line, is introduced.
接收射频前端的高增益和低噪声系数要求两级低噪放级联使用，通过计算低噪放的噪声估量确定了连接方式。
For the requirement of high gain and low noise figure (NF) of the receiver RF destination, two LNAs most be cascaded, which is determined by each noise calculation of the two different LNAs.
射频前端接收芯片实现GPS信号的接收、放大、滤波和下变频，其中最重要的是对GPS信号进行下变频转化为数字中频信号。
RF front end receives, magnifies and filtrates the GPS signal, and above all, converts it down to IF digital signal.
NJ1006是一个高集成度的单片GPS接收机射频前端集成电路，本文介绍了该芯片的作用、基本参数和它应用于GPS接收机射频前端的电路。
The NJ1006 is a higher integration level and single chip RF front-end circuit for GPS receivers. This paper has introduced its function, basic parameters and GPS Receiver RF Front circuit.
课题来源于本学院“宽带短波接收机”项目，笔者负责其中接收机射频前端部分的研制。
The subjects come from the Institute of "broadband shortwave receiver", the author of which is responsible for part of the receiver RF front-end development.
第六章为接收射频前端电路的原理图设计、PCB设计和系统电路的实现，对系统电路的重要参数进行了测试。
In chapter six, schematic design, PCB design and application circuits of receiver RF destination are all implemented and the important system parameters are tested by using the spectrum analyzer.
对于接收射频前端电路的参数进行了分析，并且提出了优化、改进的方案和下一步的工作。
After analyzing and studying the circuits test parameters and design parameters, the improving methods and the next works are presented at last.
通过对这一接收机射频前端的研究与设计，使读者对接收机射频前端的设计理论和方法有一个比较全面而清楚的理解。
Readers will have general and explicit comprehension about the design theories and measures of RF front-end of receiver through the study and design of this thesis.
频率合成器是无线通信中射频前端的主要构件模块之一，性能直接决定射频接收机的频率选择性。
The frequency synthesizer is a key building block of radio frequency front-end for wireless communications and its performance determines the frequency selectivity of radio frequency receivers.
此外还对所设计出的接收机射频前端进行了整机测试，以检验接收机射频前端性能是否满足设计所需。
Furthermore, we carried out system testing in order to examine its performance, found out that the system satisfies design targets.
此外还对所设计出的接收机射频前端进行了整机测试，以检验接收机射频前端性能是否满足设计所需。
Furthermore, we carried out system testing in order to examine its performance, found out that the system satisfies design targets.
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