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1.
周全 《半导体技术》2007,32(7):610-613
为适应微波集成电路向高性能、高可靠、多功能、小型化及低成本方向的发展趋势,介绍了一种具有限幅、开关功能的S波段平衡式低噪声放大模块,该模块利用微波薄膜混合集成电路工艺和多芯片微组装一体化集成技术.阐述了其小体积、管壳化设计.着重从三个方面对影响该放大模块幅度、相位一致性的原因进行了分析和探讨,提出了在批量化生产过程中控制幅相一致性的几点措施,给出了随机抽测的5只样品详细测试结果.该模块外形尺寸为20 mm×14 mm×5 mm.  相似文献   

2.
在高可靠星用模块研究中 ,采用特殊工艺 ,将介质振荡器、上下混频器、微波放大器、中放等微波单元集成在尺寸为 1 0 0 mm× 40 mm× 45 mm模块中 ,大大减小了体积、降低了重量 ,从而应用更广泛 ,使用更灵活。  相似文献   

3.
设计了一种小型化L波段高效率高增益脉冲功率放大模块,该模块使用微波混合集成电路技术,其体积比同等性能传统L波段功率放大器大大减小。测试结果表明,在工作电压36V、脉宽200μs、占空比10%时,L波段1.2~1.4GHz带宽内模块输出功率能达到80 W,增益近40dB,总效率大于40%,模块体积仅有25.5 mm×22.0mm×5.0mm。  相似文献   

4.
采用垂直互连技术研制了一种X波段上下变频多芯片模块,实现了微波单片集成电路和介质基板在三维微波互连结构中的平稳转换、保证了微波信号的有效传输.简要分析了垂直互连对微波传输的影响和解决方法,应用微波仿真软件建立了互联结构的三维电磁场模型,对垂直互连结构进行了仿真优化.实测结果和仿真结果吻合良好.最后在较小尺寸盒体内实现了上变频链路、下变频链路、电源管理、TTL检测四个功能.模块测试结果表明,下变频链路的变频增益大于51 dB,噪声系数小于6 dB,杂散抑制小于65 dBc;上变频链路的变频增益大于9 dB,1 dB压缩点输出功率大于11 dBm,杂散抑制小于55 dBc;模块尺寸为80 mm×42 mm×15 mm,达到了小型化设计要求.  相似文献   

5.
基于放大器小型化大功率的发展趋势,介绍了一种P波段用于雷达装备的长脉宽小型化大功率的放大器模块。为实现小型化设计,该模块采用微波混合集成电路,独特的双层腔体结构,TTL调制电压信号、阻抗转换、ADS阻抗匹配仿真和优化等技术;为提高散热性能,晶体管采用钎焊于独特的盒体上使发热部分直接紧密与整机连接。在工作电压28 V、脉宽2.5 ms、占空比25%的测试条件下,成功研制出一款P波段功率放大模块,其体积更小,功率更大,效率更高。该模块峰值输出功率大于200 W、功率增益大于48 dB,模块体积为50 mm×40 mm×18 mm。  相似文献   

6.
采用ADS软件仿真设计了一种基于GaAs小信号单片微波集成电路(MMIC)、GaN大功率MMIC和多层复合介质板的C波段小型化发射/接收(T/R)模块,实现了微波信号的放大、收发控制、数字幅相控制及+28 V高压电源调制的一体化,具有小体积、轻量化、低噪声、高功率、高效率等特点.TR模块尺寸为33 mm×65 mm×10 mm,在C波段实现指标为:发射功率50 W,功率附加效率28%,接收增益37 dB,噪声系数3 dB.  相似文献   

7.
S波段30 W微波脉冲功率放大器模块设计   总被引:1,自引:0,他引:1  
赵夕彬  关富民 《半导体技术》2007,32(10):875-877
介绍了S频段微波脉冲功率放大器模块的设计方法和试验研制过程.利用内匹配技术,采用混合集成电路制作,将四级芯片集成到微型封装的金属密封管壳中,前两级芯片采用GaAsMMIC电路,第三级采用GaAs FET晶体管,末级采用Si双极型晶体管完成功率放大,结合了GaAs器件电路和Si器件电路的各自优点.在S波段、带宽300 MHz频率范围内试制出Gp≥45 dB,Po≥30 W的功率放大器模块,模块的体积为27 mm×18.5 mm×5 mm.  相似文献   

8.
<正>本文设计了一款小型化、高效率、高增益C波段收发模块,通过小型化设计,模块最终尺寸仅为35mm×28mm×6mm。实测该模块发射链路,输出功率大于140W,附加效率大于54%。接收链路测试结果显示,小信号增益大于23d B,噪声系数小于1.5。该模块性能良好,达到了预期效果。近年来,宽禁带材料与微波功率器件发展非常迅猛。  相似文献   

9.
基于三维集成技术研制了一款适用于表面贴装技术的Ku波段四通道T/R模块.模块内部设计成两层层叠结构,层间使用球栅阵列实现互连,仿真分析模块微波垂直互连结构、腔体谐振和散热模型,实现模块的小型化.模块集成了数控移相、数控衰减和串并转换等功能,由幅相控制多功能芯片、开关功率放大器芯片、限幅低噪声放大器和控制芯片构成.测试结果显示,在Ku波段内,单路发射通道饱和输出功率大于30 dBm,接收通道增益大于20 dB,噪声系数小于3.5 dB,模块尺寸为16 mm×16 mm×2.5 mm.  相似文献   

10.
讨论了不同种三维集成技术设计方法,利用LGA结构方式设计上下基板间垂直互连,通过垂直过孔与地平面之间寄生参数的优化,达到高频宽带匹配。设计两通道X波段接收模块,将上述垂直互连结构运用到该模块结构设计中,减小模块体积。该接收模块接收增益大于31dB,噪声系数小于3.5dB,移相精度小于4°,体积仅为24mm×15mm×8mm,封装效率达到100%。  相似文献   

11.
DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.  相似文献   

12.
This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel's.  相似文献   

13.
The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.  相似文献   

14.
Today, micro-system technology and the development of new MEMS (Micro-Electro-Mechanical Systems) are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.  相似文献   

15.
The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.  相似文献   

16.
From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.  相似文献   

17.
It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output(MIMO) communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.  相似文献   

18.
In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal (200) (2d = 0.4027 nm) is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line(w), the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line(x), the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines(y), the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line(z) in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line(q) in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution(λ/△ 2) is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.  相似文献   

19.
High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET > PDMAT > TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.  相似文献   

20.
Waveguide multilayer optical card (WMOC) is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling & processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic (VB) language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.  相似文献   

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