谐波混频 meaning in Chinese
harmonic mixing
Examples
- 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。 - Secondly , the mmic 20 - 40ghz hmmc - 5040 amplifier is used to realize the phemt frequency converter . the feasibility of up / down converter using phemt sub - harmonic mixing is validated by the experimental results . at last , on the base of phemt multiplying , amplifying and gate mixing , the
之后研究了采用hp公司的20 - 40ghz放大器芯片( hmmc - 5040 )设计制作phemt ( pseudomorphichighmobiletransistor )变频器,通过测试,给出了实验结果,并通过实验验证了采用phemt二次谐波混频模式,实现上下混频的可行性。 - 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。 - It also gives the motive of the ka - band vco and mixer , associated with the subject ' s requirement and the realistic conditions , according to which a proposal is confirmed that the gunn diode and the varactor are mounted in the same cavity to fulfill the vco and an antiparallel diode pair is used to fulfill the harmonic mixer . in chapter 2 , based on the basic theory of negative resistance oscillating , we analyses the gunn oscillator and it ’ s tuning character . chapter 3 introduces the theory of millimeter - wave harmonic mixer
以此为根据结合课题需要和实验室的实际条件,确定vco采用耿氏管腔体振荡器形式,变容管与耿氏管安装在同一个腔内以进一步减小体积,采用反向并联二极管实现谐波混频;第二章介绍负阻振荡器理论及其调谐原理;第三章介绍毫米波谐波混频器基本原理;第四章给出了振荡器及谐波混频器的设计过程,整个组件联调的结果;最后是结束语,分析了电路中存在的问题,指出了改进方向。