Ku波段上变频组件的设计

介绍了Ku波段上变频组件的设计与制作,整个组件由低相噪振荡器、滤波器、功分器、功率放大器、PIN开关、上变频器等部分组成。文章分别对一些主要部件进行了简要的理论分析,并给出微波电路的结构形式,最后给出样品的测试结果。     

Ku波段收发组件研制

介绍了Ku波段收发组件的设计与制作,整个组件由低相噪振荡器、滤波器、功分器、发射开关、发射推动级、功率放大器、低噪声放大器、接收开关、混频器和中频放大器等部分组成。文章分别对一些主要部件进行了简要的理论分析,并给出微波电路的结构形式,最后给出样品的测试结果。     

A single-supply Ku-band 1-W power amplifier MMIC with compact self-bias PHEMTs

In this letter, the design of a self-bias 1.8-mm AlGaAs/InGaAs/GaAs pseudomorphic high electron mobility transistor with a compact source capacitor for operation in Ku-band frequency is described. Based on the proposed device, a self-bias Ku-band 1-W two-stage power amplifier monolithic microwave integrated circuit (MMIC) is also demonstrated. Under a single bias condition of 8 V and 630 mA, the self-bias MMIC possesses 14.2-dB small-signal gain, 30.2-dBm output power at 1-dB gain compression point with 19.2% power added efficiency and 31.3-dBm saturated output power with 22.5% power added efficiency at 14GHz. With the performance comparable to the dual-bias MMIC counterpart, the proposed self-bias MMIC is more attractive to system designers on very small aperture terminal applications.     

A SiGe BiCMOS transmitter module for IMT2000 applications

This paper describes a Tx module for IMT2000 applications consisting of an up-conversion mixer and a variable-gain driver amplifier. The up-conversion mixer, based on the Gilbert active topology has a power gain of 4.8 dB and consumes 15-mA current from a 3-V supply. The variable-gain driver amplifier comprises a gain-controlled stage of the current steering structure and a common emitter stage, and has a variable-gain range of over 30 dB with 30.3-mA current consumption. The Tx module achieves a gain error of less than 1.2 dB over a 30-dB gain range, an output IP3 of 25 dBm, and an output PI dB of 7.4 dBm at the maximum gain of 24.5 dB. It occupies 1.0 /spl times/ 1.2 mm.     

Integrated 460 GHz photonic transmitter module

A photonic sub-millimetre (sub-mm) wave transmitter module has been developed and fabricated. The module consists of a 1.55 μm waveguide InP photodetector monolithically integrated with a planar full wave slot antenna and passive lowpass filter for DC bias supply. For the first time, optical heterodyne 460 GHz sub-mm signal generation is demonstrated It is further shown that the module can effectively replace the classical solid-state oscillator of an astronomical superconductor-insulator-superconductor heterodyne receiver The module generates sufficient sub-mm wave power to operate the receiver under optimum conditions     

Embedded IC and high-Q passives technology for ultra-compact Ku-band VCO module

In this letter, we present a novel ultra-compact embedded IC integration approach for system-on-package (SOP) based solutions for RF and wireless communication applications. This concept is applied to the integration of a Ku band VCO module. The module fabrication is described and the impact of the packaging on the chip-set performances is discussed. The final thickness of the module is about 150 /spl mu/m. The embedded VCO exhibits an oscillation frequency of 15.4 GHz, a phase noise of -99.2 dBc/Hz at a 1 MHz offset and maximum output power of 10.67 dBm. Multilayer interconnects built with modified MCM-D technology using advanced photosensitive epoxy Intervia 8000 is described. Characterization and modeling of RF inductors are detailed and show quality factor as high as 80 at 10 GHz.     

SDH网络分析测试仪发送模块的设计

提出了一个SDH网络分析仪发送模块的设计方案,可以实现SDH网络分析测试仪发送模块所需的功能--能够产生符合ITU-T G.707标准STM-I、STM-4、STM-16、STM-64帧结构的光信号以及符合ITU-T G.704标准的E1、E3、E4、DS1、DS3各种PDH电信号,同时还能插入各种相关的报警和误码,并提供指针调整功能.所设计的发送模块不仅可以作为SDH网络分析仪中重要的组成部分,也可以作为信号源为各种SDH设备的研发和调试提供标准的SDH信号.     

A compact 3R-receiver module for short-haul SDH STM-16 systems

This paper describes a complete 3R optical receiver module for synchronous digital hierarchy (SDH) STM-16 short-haul systems, housed in a 20-pin dual-in-line (DIL) ceramic package. The module includes an InGaAs p-i-n photodiode, a commercial GaAs transimpedance amplifier, and a custom-made silicon bipolar frequency- and phase-locked loop (FPLL)-based clock and data recovery (CDR) circuit. The fiber pigtail is actively aligned to the photodiode by using a proprietary technology that uses a silicon-based optical submount assembly (OSA). The use of a clock recovery circuit based on an FPLL allows avoiding an external low-frequency reference clock and achieving a root-mean square (rms) jitter of 0.075 UI. The module requires two supply voltages of 5 V and -4.5 V, for a total power dissipation of 930 mW, and has a total volume below 0.75 cm³ (24.7×9.9×3 mm³). Measurements have shown full compatibility with SDH standards     

External cavity controlled single longitudinal mode laser transmitter module

A GaInAsP/InP laser transmitter module incorporating an external cavity is described. It is shown that the cavity produces stable tunable single longitudinal mode operation of the laser even under high speed modulation conditions.     

无线激光通信光发射模块的研究

为了提高现代武器系统在恶劣电磁环境中的通信和信息交换能力,充分利用激光的天然保密性,减少对无线电频率资源的占用,对无线激光通信系统中的光发射模块进行了设计。在信标光发射模块的设计中采用驱动电路与温度控制电路分离的设计方案;在信号光发射模块中采用掺银铒光纤放大器(EDFA)作为功率放大器的设计方案,并采用DS90LV001芯片完成PECL信号与LVDS信号转换。试验结果表明,信标光的最高输出功率为1.53 W,最高频率大于10 kHz;信号光的输出功率大于19.8 dBm,误码率低于10-7,消光比为10.2 dBm,完全满足设计需求。     

A compact manufacturable 76-77-GHz radar module for commercial ACCapplications

The design and measured results of a single-substrate transceiver module suitable for 76-77-GHz pulsed-Doppler radar applications are presented. Emphasis on ease of manufacture and cost reduction of commercial millimeter-wave systems is employed throughout as a design parameter. The importance of using predictive modeling techniques in understanding the robustness of the circuit design is stressed. Manufacturing techniques that conform to standard high-volume assembly constraints have been used. The packaged transceiver module, including three waveguide ports and intermediate-frequency output, measures 20 mm×22 mm×8 mm. The circuit is implemented using discrete GaAs/AlGaAs pseudomorphic high electron mobility transistors (pHEMTs), GaAs Schottky diodes, and varactor diodes, as well as GaAs p-i-n and pHEMT monolithic microwave integrated circuits mounted on a low-cost 127-μm-thick glass substrate. A novel microstrip-to-waveguide transition is described to transform the planar microstrip signal into the waveguide launch. The module is integrated with a quasi-optical antenna. The measured performance of both the component parts and the complete radar transceiver module is described     

A Ku-band active transmit-array module with a horn or patch arrayas a signal launching/receiving device

This paper is concerned with the design of a Ku-band active transmit-array module of transistor amplifiers excited by either a pyramidal horn or a patch array. Optimal distances between the active transmit array and the signal-launching/receiving device, which is either a passive corporate-fed array or a horn, are determined to maximize the power gain at a design frequency. Having established these conditions, the complete structure is investigated in terms of operational bandwidth and near-field and far-field distributions measured at the output side of the transmit array. The experimental results show that the use of a corporate-fed array as an illuminating/receiving device gives higher gain and significantly larger operational bandwidth. An explanation for this behavior is sought     

Fiber-pigtail-detachable plastic MiniDIL transmitter module with a tool-free optical connector

A fiber-pigtail-detachable plastic MiniDIL transmitter module using a tool-free optical connector and applicable to the OC 3 and OC 12 in the SONET/SDH standards has been developed as a cost-reducing solution. The newly developed optical connector works without a special tool to connect and disconnect it from the module. Transmitter fiber output of more than 0.4 mW, insertion loss of less than 0.3 dB, return loss of more than 55 dB, and a repeatability of more than 30 times were achieved.     

基于VCSEL的光发射模块的研究与设计

概述了近年来发展迅速的以垂直腔面发射激光器(VCSEL)作为发光器件的发射模块的结构，以及半导体激光器的特性。在了解了半导体激光器驱动电路的基本功能和设计要求后，重点介绍采用美国MAXIM公司生产的VCSEL驱动器MAX3740来设计基于VCSEL的光发射模块。     

Performance characteristics of a compact position-sensitive LSO detector module

We assembled a compact detector module comprised of an array of small, individual crystals of lutetium oxyorthosilicate:Ce (LSO) coupled directly to a miniature, metal-can, position-sensitive photomultiplier tube (PSPMT). We exposed this module to sources of 511-keV annihilation radiation and beams of 30- and 140-keV photons and measured spatial linearity; spatial variations in module gain, energy resolution, and event positioning; coincidence timing; the accuracy and sensitivity of identifying the crystal-of-first-interaction at 511 keV; and the effects of intercrystal scatter and LSO background radioactivity. The results suggest that this scintillator/phototube combination should be highly effective in the coincidence mode and can be used, with some limitations, to image relatively low-energy single photon emitters. Photons that are completely absorbed on their first interaction at 511 keV are positioned by the module at the center of a crystal. Intercrystal scatter events, even those that lead to total absorption of the incident photon, are placed by the module in a regular "connect-the-dot" pattern that joins crystal centers. As a result, the accuracy of event positioning can be made to exceed 90%, though at significantly reduced sensitivity, by retaining only events that occur within small regions-of-interest around each crystal center and rejecting events that occur outside these regions in the connect-the-dot pattern.     

Very compact thin power amplifier module for gigahertz-bandcellular systems

A power amplifier module for gigahertz-band cellular phone systems. Developed using a build-up structure based on MCM-D technology and all planar passive circuit components, is investigated. It is shown that the very compact thin module can be incorporated with a thickness of <1 mm and a volume of <0.1 cc     

雷达数字信号光纤传输系统发射模块的设计

介绍了一种采用FPGA技术实现的雷达数字信号光纤传输系统。根据雷达信号的特点,采用特殊的帧结构形式,在一根光纤上实现了雷达多路数据的传输。     

基于LTCC技术的无源气压传感器研制

介绍基于LTCC技术的无源气压传感器的基本原理和理论模型,主要制作工艺流程和关键工艺难点。研究了LTCC内埋型空腔的实现方法、牺牲层材料的选取和依据,并对无源气压传感器的理论模型进行仿真分析与实际测试。结果表明利用LTCC内置空腔技术研制的气压传感器测试结果与仿真分析吻合较好,谐振频率随外界压力的增大而减小,谐振频率随压力的变化近似于线性变化,在复杂环境内依然能够实现预期功能。     

A Ku-band integrated receiver front end

A Ku-band integrated receiver front end has been fabricated on 20-mil aluminum oxide substrates. The receiver consists of a balanced mixer and a Gunn oscillator within an area of 0.300/spl times/0.325 inch. The performance of both packaged and unpackaged microstripline receivers is described. Using external RF tuning, a noise figure of 9 dB at 18 GHz was obtained. A higher Q Gunn oscillator design is needed for more reliable single-frequency operation.