混频

We have conducted measurements in heterodyne detection including superconductor mixers and semiconductor harmonic mixers, direct detection including InSb semiconductor bolometer and Golay Cell, and some materials which could be permeated by terahertz waves.

测得的频谱分辨率可达约1 GHz。我们已经测量的器件有：超导隧道结混频器和工作于常温的半导体肖特基谐波混频器，InSb半导体Bolometer和Golay Cell直接检测器，各种频率的THz信号源，和一些能透过THz的材料等。

A set of mixers (210, 212, 214, 216) mixers the output of the first pair of decimation filters with two phases of a digital representation of an local IF signal.

一组混频器(210，212，214，216)使第一对抽取滤波器的输出与本地IF信号的数字表示的两相混频。

A down-converting mixer fabricated with 0.18μm RF CMOS technology is designed for OFDM-UWB applications.Differing from conventional Gilbert cell topology,a differential topology is proposed and applied in order to reduce the noise contribution and disturbance from the large signal of the local oscillation,as well as to lower the DC consumption of the mixer.

设计了基于正交频分复用超宽带系统的下变频混频器（Mixer ，并采用0.18μm RF CMOS工艺，通过一种不同于传统Gilbert结构的新颖的双平衡结构来实现，以降低本振大信号对输出中频端的噪声贡献和干扰，降低混频器的静态直流功耗等。

Competition among four-wave mixing with two dressing fields, the six-wave mixing with one dressing field as well as the eight-wave mixing propagating along the same direction can be evoked by adjusting laser beams because these multi-wave mixing signals are induced by atomic coherence between common levels.

研究发现，通过调节激光束方向，沿同一方向出射的八波混频、双缀饰四波混频和单缀饰六波混频信号因共用能级的原子相干产生而出现竞争现象，通过控制缀饰场减弱四波混频和六波混频信号强度，可以达到增强八波混频信号的目的。

First of all, we introduce the 60GHz rat-race which is symmetric and experimental, and then implement 10GHz wideband mixer by using TSMC SiGe 0.35um BiCMOS process and GCTC 2.0um HBT process in circuit design. In TSMC SiGe 0.35um,we design micro mixer with Cherry Hooper technique and active load with single ended output.

本论文首先介绍60GHz实验性质的rat-race对称电路，接著在电路设计方面以TSMC SiGe 0.35μm BiCMOS以及GCT 2μm InGaP/GaAs HBT 制程来研制应用於10GHz 之宽频混频器，其中在TSMC SiGe制程包含了使用Cherry Hooper技术混频器以及电流镜主动负载单端输出的微混频器。

In SiGe BiCMOS process, there are a 5.2GHz CMFB micromixer, a 5.7GHz up-conversion micromixer using LC current combiner, a 5.2GHz LC current combine up-converter with lumped element rat-race and a 5.2GHz image rejection double quadrature down-converter.

其中SiGe BiCMOS制程包含了5.2GHz共模回授微混频器电路、5.7GHz 使用LC电流合成器之升频微混频器、整合集总元件Rat-race的5.2GHz LC电流合成升频器与5.2GHz镜像消除双正交四相位降频器等电路。

The main design techniques of mixer,authors' research on linearity analysis of transconductance are also presented, along with a new topology of mixer authors designed.

并介绍了当前CMOS混频器的主要电路设计技术以及作者在混频器跨导线性度分析方面进行的研究，文中还给出了作者设计的一个新型混频器的结构。

In this thesis, we introduce RF transceiver architectures for the wireless communication system and some parameters of the down-conversion mixer. By means of the noise model of RF-CMOS mixers presented by ABIDI in 2000, circuit designers will know how the noise appears at the output of a CMOS down-conversion mixer.

本篇论文介绍了无线通讯系统中常用的射频接收机系统架构及混频器的参数介绍外，并藉由ABIDI於2000年所提出CMOS混频器之杂讯模型，透过此模型将使电路设计者更清楚的了解到杂讯源将经由何种过程出现在混频器的输出端。

Multi-conductor coupled-line Marchand baluns and broadband frequency doublers and mixers are presented in this dissertation. This research focuses on the development of miniature broadband frequency conversion circuits including frequency doublers, fundamental down-conversion mixer, and IQ-demodulator.

本论文主要是讨论多金属耦合线马逊平衡不平衡转换器及宽频的倍频器及混频器，研究方向是著重於发展包含倍频器、降频器及正交解调变器在内的微小化宽频频率转换电路。

The apparatus (40) further comprises a second mixer (42) with a second mixer input (45), a second local oscillator input (48), and a second mixer output.

该装置(40)进一步包括具有第二混频器输入(45)、第二本地振荡器输入(48)、和第二混频器输出的第二混频器(42)。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了