本文主要分析用正交信号实现单边带混频电路，并阐述其优越性。
This paper analyzed chiefly the circuit of single side-band mixing by use of orthographic signal and described advantages of the mixing circuit.
发射模块由频率合成电路、脉冲序列产生电路、混频电路和功放电路构成。
Transmitter is made up of frequency synthesizer, pulse sequence generator, mixer and amplifier.
设计了适合超宽带通信的混频电路，并对电路进行优化确定电路的元件参数。
Designed the CMOS mixer circuit for UWB communication system, and the device parameters.
主要步骤包括：器件的射频等效模型分析、混频电路设计与优化、混频电路的阻抗匹配。
The main process includes following: analysis of device model, design mixing circuit, impedance matching.
选定混频器电路拓朴后，应用非线性电路的分析理论对混频器进行了优化。
After selected the topology of the mixer, using nonlinear circuit analysis theory we simulate and optimize the mixer circuit.
介绍采用微波混频器的上变频特性实现宽带平方电路的设计方法与具体实现，主要用于高码速率QPS K信号的载波恢复。
An introduction of the design and implementation of a broad-band square circuit is given, which is used to recover the carrier of the high speed QPSK signal.
将此方法在LAN上进行了尝试，证明了其同样适用于LAN上的微波混频器电路的设计，有助于满足微波混频器以及其他微波部件电路团队设计的需要。
The method is attempted in LAN, proved that it can be used to design microwave mixer circuit in LAN, which can satisfy the need for group design. Finally.
本文设计的地面信号处理电路由信号放大、混频、滤波和解调电路四部分构成，本文重点对采用MAX274集成芯片和滤波电路进行了分析和设计。
The received circuit is make up of magnify, mixing, filter the wave and demodulation circuits. MAX274 chip and wave filtering circuits is designed in detail.
对于该混频器理论研究，包括非线性电路模型及三端器件混频器的设计方法方面都是必要的尝试，可为以后的理论探讨提供重要的经验。
The study about the mixer including nonlinear circuit model and the analysis method is necessary attempt. All of that can provide important experience for later research on it.
该电路采用二次变频低中频结构，集成了低噪声放大器、上变频混频器、下变频混频器等模块。
An RF front-end circuit for a fully integrated CMOS DTV tuner is presented in this paper, where double-conversion low IF architecture is employed.
文中还对具有镜频回授的单道性混频器电路提出了简明的分析方法。
Then, analysis and evaluation of various circuits for microwave mixers are given.
采用无滤波器的镜像抑制结构设计高集成度的混频集成电路，可大大提高电路的集成度及解决相关衍生的问题。
While with the filterless structure of image rejection can improve the intensity of the intergrated circuit, it can greatly improve the integration of circuit and solve the relevant problems.
通过整形电路，使混频后的正弦信号变为方波信号。
The sine signal from the mixer was turned to the square signal by a reshape circuit.
子电路包括低噪声放大器、射频滤波器、混频器、驱动放大器、功率放大器、中频滤波器等。
The subcircuits consist of the low noise amplifier, RF filter, mixer, driver amplifier, image filter, power amplifier, transmit-receive switch and if filter and so on.
接收电路采用了零中频方式，相对于超外差方式，明显简化了电路结构，仅由混频器、差分放大器和电压比较器组成；
Receiving Circuit adopts the zero-IF, only consists of the mixer, differential amplifiers and voltage comparator, compared to super heterodyne, obviously simplifies the structure of the circuit;
从PSK调制器20输出的连续波在延迟电路26I和延迟电路26Q中被延迟，然后作为参考信号提供给接收混频器30的每个混频器。
The continuous wave output from the PSK modulator 20 is delayed in delay circuits 26I and 26Q and is then supplied, as a reference signal, to each of mixers of a receiving mixer 30.
同时，在硬件电路上采用多次滤波滤除噪声，采用高增益接收解调芯片MC13135对接收信号进行两次混频滤波，提取出微弱有用信号，进一步提高通信模块抗衰减能力。
At the same time , several filters are adopted in hardware circuits. The reception chip MC13135 with high gain is used to promote the capability of anti-attenuation of the interface .
无需其他额外的支持电路，利用该评估板即可实现对CDMA和GPS低噪声放大器（LNA）和下变频混频器的评估。
The evaluation kits allow the evaluation of the CDMA and GPS low-noise amplifiers(LNA) , as well as the CDMA and GPS down-converter mixers , without the use of any additional support circuitry.
无需其他额外的支持电路，利用该评估板即可实现对CDMA和GPS低噪声放大器（LNA）和下变频混频器的评估。
The evaluation kits allow the evaluation of the CDMA and GPS low-noise amplifiers(LNA) , as well as the CDMA and GPS down-converter mixers , without the use of any additional support circuitry.
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