In the paper , the technique of millimeter - wave power - combining is discussed in detail . the methods of spatial power - combining are presented . according to the theory of electromagnetic , the characteristic of each method is analyzed 本论文首先详细介绍了目前应用较为广泛的功率合成方式,包括电路级合成、准光学空间功率合成、开槽波导空间功率合成和波导内空间功率合成。
Chapter 2 introduces the principle theory of lna , harmonic mixer , multiplier , spdt , vco and the basic design flows of the ads examples ( x - band ) , the power combine technology , the millimeter - wave power amplifier mmics ’ trends nowadays 第三章介绍了毫米波前端中无源电路的设计,包括毫米波窄带滤波器的设计、微波和中频滤波器的设计、波导到微带的过渡、微波信号的层间过渡。
In this thesis , various solid - state power - combining techniques have been studied and analyzed . then waveguide - based millimeter - wave power combining structures are explored and implemented according to domestic assembly techniques . the main results are as follows : 1 本文在分析和研究各种固态功率合成技术的基础上,采用波导基的空间功率合成器结构方案,立足于国内的装配工艺,对毫米波功率合成电路作了探索性研究。
Other than hydro - electric power , renewable resources of energy , eg solar , wind power , wave power , are unlikely to contribute significant quantities of additional energy during this century at the global level , although they could be of importance in particular areas 除了水力发电站,其它的可再生能源,比如太阳能、风能、潮汐能,本世纪内似乎不可能建立对全球水平有意义额外能源的数量,虽然在特定的地区能发挥重要的作用。
To accelerate the development of next generation high dwdm system , the pape r also researches the property of gain . based on optical wave nonlinear transmission equation , the gain model of fra is established . by the way of numerical analysis , it is obtained that the gain of fra has relation with pump power , input signal wave power , the effective area and absorption of fiber . the obtained conclusion has definite instruction to the design of fra 为了促进下一代超高速dwdm密集波分复用技术的发展,本文还研究了光纤喇曼放大器的增益特性,根据光波非线性传输方程建立光纤喇曼放大器增益模型,通过数值模拟分析了泵浦波功率、信号输入光功率、以及光纤有效面积和损耗对光纤喇曼放大器增益的影响,得出了一些对光纤喇曼放大器的设计有一定的指导意义的结论。
Wave energy is the transport of energy by ocean surface waves, and the capture of that energy to do useful work ? for example, electricity generation, water desalination, or the pumping of water (into reservoirs). Machinery able to exploit wave power is generally known as a wave energy converter (WEC).