半导体技术在大功率微波加热应用研究

研究大功率半导体微波技术应用与微波炉加热,通过半导体微波炉控制系统、半导体微波馈入系统研究,实现半导体微波技术在大功率微波炉上应用。试验测试表明：半导体微波加热功率输出能够达到600W,半导体微波炉负载及频率牵引特性满足要求,加热均匀性在70％以上。加热效率在40％左右,还需进一步提升。     

Noise spectrum characteristics of low-noise microwave tubes and solid state devices

In this paper experimental data on the FM and AM noise of low-noise microwave tubes, "solid-state klystrons," and solid-state chains of the types used in Doppler radars are presented. The tube types include magnetrons, klystrons, and triodes. Data on solid-state chains of the type consisting of a VHF crystal-controlled transistor oscillator, followed by a VHF transistor power amplifier, and a varactor frequency multiplier are also presented. The spectral shape of the solid-state chain is shown to differ from those of the microwave tubes and that of the "solid-state klystron." Comparisons are made between the various devices.     

LD光纤耦合泵浦单频双向连续固体环形激光器

分析了用于激光陀螺的固体激光器的特点，采用LD光纤耦合泵浦，对四镜8字形腔的连续固体环形激光器进行了实验研究。使用具有光阑功能的F?蛳P标准具选模，实现了基横模单纵模运转，实验获得了单频双向连续输出，并测量了其双向输出功率特性，单路输出功率稳定性100 s内为0.4%，在单模输出0.2 mW时，1.5 s内线宽约为4 kHz。分析表明获得窄线宽是固体激光器用于陀螺的首要要求，还表明使用均匀加宽增益的连续固体环形激光器能实现单频双向运转。     

X波段固态功率放大器稳定性分析设计

X波段固态功率放大器相对于较低频段的固态功率放大器，其稳定性问题更加突出。腔体效应是导致稳定性问题的重要因素，通过对腔体效应的理论分析，文中提出了工程应用中解决因腔体效应导致的稳定性问题的可行方法，成功地解决了X波段固态功率放大器设计过程中遇到的腔体效应问题。     

一种新研制的W频段固态GaN功率放大器毫米波源

介绍了一种新研制的W频段固态GaN功率放大器毫米波源,给出了系统组成与工作原理,提供了其主要部件W频段固态Gunn驱动源、W频段波导-微带转换器、主放大器芯片基本性能及实验测试结果。该固态毫米波源工作频率94 GHz,输出连续波功率大于300 mW,线性增益10 dB,附加效率(PAE)大于16%。在W频段固态毫米波源研制过程中,其单片微波集成电路(MMIC)功率放大器半导体材料选择经历了GaAs、InP到GaN演变,结果清楚表明, W频段毫米波源的GaN MMlC功率放大器输出功率、增益、效率、高温性能要优于其他固态MMIC功率放大器性能。 W频段大功率固态GaN MMlC技术将在毫米波领域带来新的技术革命和应用。     

Solid-state imaging—Methods of approach

Various approaches to solid-state imaging systems are summarized, and characteristic features reviewed. The paper assumes some familiarity with the work reported in preceding papers and attempts to relate the generalized tradeoffs between the various approaches. It is concluded that the capability has been developed to realize limited performance solid-state imaging systems, but that considerable additional development work is needed to realize high quality, high performance solid-state imaging.     

Diode laser-pumped solid-state lasers

Recently, interest in diode laser-pumped solid-state lasers has increased due to their advantages over flashlamp-pumped solid-state lasers. A historical overview is presented of semiconductor diode-pumped solid-state lasers beginning with work in the early 1960s and continuing through recent work on wavelength extension of these devices by laser operation on new transitions. Modeling of these devices by rate equations to obtain expressions for threshold, slope efficiency, and figures of merit is also given     

多功能固态发射机的一体化设计

介绍了一种多功能固态发射机,讨论了固态发射机的多种功能要求,发射机的不同方案,发射组件的组成、工作原理以及发射机的技术难点等.有源相控阵雷达天线的发射低副瓣是该发射机的显著特点;采用分布式发射组件的幅度加权技术可以实现发射低副瓣.为了融合发射机的多种功能,重点讨论了一体化发射机研制过程中需要解决的一系列工程技术问题.最后给出了比较满意的实验结果.     

德、美固体激光器研究开发一瞥

这份出国考察报告介绍了作者最近到德国和美国访问的十三个单位研究开发和生产固体激光器的情况。面泵浦固体激光器(即板条式激光器)、半导体二极管泵浦固体激光器和激光加工是这份报告的重点。     

变压器耦合固态刚管调制器的窄脉冲应用

当前研制固态刚管调制器已经是雷达发射机技术的重要发展方向,不论是直接耦合还是变压器耦合的固态刚管调制器,在许多新型雷达发射机中都得到了应用。文中从开关器件的选择和变压器分布参数两个方面,对变压器耦合固态刚管调制器在窄脉冲应用时的输出波形进行了分析,通过分析和一些验证试验,得到了控制脉冲前沿和过冲的方法。