GaAs MMIC收发机已用于WLAN系统中

ＧａＡｓＭＭＩＣ收发机已用于ＷＬＡＮ系统中据报道，美国ＤＡＩＣＯ工业公司开发的Ｐ３５－４７１０１－１单片ＧａＡｓＭＭＩＣ已用作２．４ＧＨｚＷＬＡＮ（无线局部区域网）的收发机。该收发机包括ＶＣＯ、上变频器、下变频器ＬＮＡ、前置放大器和后置放大器、收／发...     

GaAs IC CAD及其在通信电路中的应用技术

介绍了自主开发的多个完整实用的ＧａＡｓ ＩＣ ＣＡＤ软件,包括微波无源元件建模、微波有源器件测试建模、微波毫米波ＩＣ ＣＡＤ、光电集成电路ＣＡＤ、ＧａＡｓ ＶＨＳＩＣ ＣＡＤ、微波高速ＭＣＭ ＣＡＤ等,并简要介绍了针对ＧａＡｓ工艺线的建库工作。以上软件和库已用于多个通信电路的设计。     

GaAs单片电路封装

简述了微波在封装中的传输特性，以及不同封装型式和材料的ＧａＡｓＭＭＩＣ封装，介绍了多层共烧陶瓷在ＭＭＩＣ封装中的应用。最后，综述了国外ＧａＡｓＭＭＩＣ的最新封装与互连技术。     

提高砷化镓功率MMIC中电容成品率的研究

金属－绝缘体－金属（ＭＩＭ）电容量影响ＧａＡｓ微波单元集成电路（ＭＭＩＣ）成品率的主要原因之一，ＰＥＣＶＤ氮化硅膜又是影响ＭＩＭ电容质量和成品率的主要因素。本文通过实验和分析，提出了提高氮化硅膜质量和减少薄膜针孔的方法，结果大大提高了ＭＩＭ电容ＧａＡｓＭＭＩＣ的成品率，降低了ＧａＡｓ ＭＭＩＣ的成本。     

GaAs器件及MMIC的可靠性研究进展

介绍了国外ＧａＡｓ微波器件及ＭＭＩＣ的可靠性研究进展情况，给出ＧａＡｓＭＥＳＦＥＴ、ＨＥＭＴ和ＭＭＩＣ的主要失效模式和失效机理以及在典型沟道温度下的平均寿命代表值。     

具有低温特性的宽频带P－HEMT MMIC LNA

具有低温特性的宽频带Ｐ－ＨＥＭＴ　ＭＭＩＣ　ＬＮＡ《ＩＥＥＥＴＭＴ＆Ｔ》１９９３年第６—７期报道了使用０．２μｍＴ型栅，ＩｎＧａＡｓＰ－ＨＥＭＴ工艺制作了两个８～１８ＧＨＺ宽带单级ＭＭＩＣ低噪声放大器。其中一个为平衡结构的Ｐ－ＨＥＭＴＭＭＩＣＬＮＡ，...     

Ku波段PHEMT单片低噪声放大器的设计与实验

通过分析微波单片集成电路（ＭＭＩＣ）与常用的微波立体电路的不同点，讨论了采用通用的微波电路软件进行ＭＭＩＣ精确设计的有效途径，着重分析了在软件中如何建立三类ＭＭＩＣ用元件（有源器件、无源元件及由ＭＭＩＣ工艺决定的特有图形元件）电路模型的方法，借助这一分析，使用通用的微波电路软件，完成了Ｋｕ波段两级ＡｌＧａＡｓ／ＩｎＧａＡｓＰＨＥＭＴ单片低噪声放大器的设计与研制，取得了与ＣＡＤ设计值十分相近的实验结     

75～110GHz InGaAs／GaAsHEMT高增益MMIC放大器

７５～１１０ＧＨｚＩｎＧａＡｓ／ＧａＡｓＨＥＭＴ高增益ＭＭＩＣ放大器毫米波ＩｎＧａＡｓ／ＧａＡｓＰＨＥＭＴ已在通信、雷达、灵巧武器、电子战和辐射测量系统等方面获得广泛应用。近来，以ＰＨＥＭＴ为基础的工艺技术已取得令人瞩目的进展，因而能在兼顾高性能的情...     

GaAs MMIC应用展望

ＧａＡｓ　ＭＭＩＣ应用展望本刊主编林金庭中图分类号：ＴＮ４５４ＰｅｒｓｐｅｃｔｉｖｅｏｆＧａＡｓＭＭＩＣｓＡｐｐｌｉｃａｔｉｏｎ￥ＬｉｎＪｉｎｔｉｎｇ１９９０年以前，砷化镓（ＧａＡｓ）技术的８０％是用于军事，随着冷战结束，高性能的ＧａＡｓＩＣ向何处去...     

最新的通信IC

以下介绍的通信ＩＣ都是各公司１９９６年的最新产品，其品种涉及到ＰＣＳ手机、无绳电话、无线通信、卫星电视、调制解调器、ＦａｓｔＥｔｈｅｒｎｅｔ和ＡＴＭ等。＋３ＶＤＣＰＣＳ手机用分立器件和ＩＣＯｋｉ　Ｓｅｍｉｃｏｎｄｕｃｔｏｒ公司开发了一系列８００～１９００ＭＨｚＰＣＳ手机用＋３ＶＤＣ分立器件和ＩＣ。这些器件是用ＧａＡｓＭＥＳＦＥＴ技术和硅ＣＭＯＳ技术制作的。ＧａＡｓ器件包括ＫＧＦ１６０６分立ＧａＡｓ场效应管（ＦＥＴ）、ＫＧＦ１６０８分立ＧａＡｓ　ＦＥＴ和ＫＧＦ１２６２中功率ＧａＡｓ单片微波集成电路…     

60 GHz multi-chip-module receiver with substrate integrated waveguide antenna and filter

A compact 60 GHz MCM receiver has been demonstrated by integrating millimetre-wave substrate-integrated waveguides and GaAs MMICs for the first time. The module includes a waveguide antenna and filter, MMIC LNA and mixer, and lumped elements for IF filtering embedded into the multilayer photo-imageable thick-film substrate. Cavities for MMIC attachment are photo-imaged as part of the standard process.     

具有带外抑制特性的Ka波段低功耗低噪声放大器

基于0.15μm GaAs赝配高电子迁移率晶体管(PHEMT)工艺,成功研制了一款30~34 GHz频带内具有带外抑制特性的低功耗低噪声放大器(LNA)微波单片集成电路(MMIC)。该MMIC集成了滤波器和LNA,其中滤波器采用陷波器结构,可实现较低的插入损耗和较好的带外抑制特性;LNA采用单电源和电流复用结构,实现较高的增益和较低的功耗。测试结果表明,该MMIC芯片在30~34 GHz频带内,增益大于28 dB,噪声系数小于2.8 dB,功耗小于60 mW,在17~19 GHz频带内带外抑制比小于-35 dBc。芯片尺寸为2.40 mm×1.00 mm。该LNA MMIC可应用于毫米波T/R系统中。     

5~22GHz平坦高增益单片低噪声放大器

使用0.25μm G aA s PHEM T工艺技术,设计和制造了性能优良的5-22 GH z两级并联反馈单片低噪声放大器。在工作频率5-22 GH z内,测得增益G≥18 dB,带内增益波动ΔG≤±0.35 dB,噪声系数N F≤3.2 dB,输入输出驻波V SW R≤1.7,最小分贝压缩点输出功率P1dB≥10.5 dBm,电流增益效率达2.77 mA/dB。测试结果验证了设计的正确性。     

S波段单片低噪声放大器与混频器

南京电子器件研究所最近利用76mmGaAsMMIC工艺线研制出数种单片电路。封面照片为S波段低噪声放大器与混频器单胞及大圆片照片，初步微波性能如下：放大器：增益＞22dB；噪声系数＜1．5dB；输入输出驻波＜1．5混频器：变频增益＞4dB；各端口驻波＜1．5；各端口隔离度＞24dB电源：±5VS波段单片低噪声放大器与混频器     

共面波导形式的倒扣焊X波段低噪声放大器

研究了倒扣焊封装的共面波导 ( CPW) X波段低噪声单片放大器的设计方法、制作工艺及测量结果 ,验证了倒扣焊技术在微波频段应用的可行性。低噪声放大器单片是在 Ga As MMIC工艺线上用全离子注入、0 .8μm栅工艺研制完成。单片电路使用共面波导作为传输线 ,它可以将电磁场束缚在较小的空间内 ,受倒扣衬底的影响较微带线小。与传统的引线键合技术相比 ,单片倒扣焊于陶瓷载体上 ,性能有明显改善 ,在 9.2～ 10 .3GHz,G≈ 12 .1d B。     

宽带单片低噪声放大器

由电路和噪声基本定义出发,导出了二端口网络的噪声相关矩阵的转移表示式和导纳表示式.并推导了两个二端口网络的级联和并联后的噪声相关矩阵.然后在此基础上得出了并联反馈放大器的噪声参数(R_n,NF_min和Y_opt)和其S参数表达式.由此设计和制造了1~7GHz两级单片低噪声放大器.在工作频率1~7GHz内,测得增益G＞20dB,带内增益波动ΔG≤±0.75dB,噪声系数NF≤2.5dB,输入输出驻波VSWR≤2.0,1分贝压缩点输出功率P_1dB≥15dBm.测试结果验证了设计的正确性.     

A single-chip GaAs MMIC image-rejection front-end for digitalEuropean cordless telecommunications

An active image-rejection filter is presented in this paper, which applies actively coupled passive resonators. The filter has very low noise and high insertion gain, which may eliminate the use of a low-noise amplifier (LNA) in front-end applications. The GaAs monolithic-microwave integrated-circuit (MMIC) chip area is 3.3 mm² . The filter has 12-dB insertion gain, 45-dB image rejection, 6.2-dB noise figure, and dissipates 4.3 mA from a 3-V supply. An MMIC mixer is also presented. The mixer applies two single-gate MESFETs on a 2.2-mm² GaAs substrate. The mixer has 2.5-dB conversion gain and better than 8-dB single-sideband (SSB) noise figure with a current dissipation of 3.5 mA applying a single 5-V supply. The mixer exhibits very good local oscillator (LO)/RF and LO/IF isolation of better than 30 and 17 dB, respectively, Finally, the entire front-end, including the LNA, image rejection filter, and mixer functions is realized on a 5.7-mm ² GaAs substrate. The front-end has a conversion gain of 15 dB and an image rejection of more than 53 dB with 0-dBm LO power. The SSB noise figure is better than 6.4 dB, The total power dissipation of the front-end is 33 mW. The MMIC's are applicable as a single-block LNA and image-rejection filter, mixer, and single-block front-end in digital European cordless telecommunications. With minor modifications, the MMIC's can be applied in other wireless communication systems working around 2 GHz, e.g., GSM-1800 and GSM-1900     

An ultra-low power InAs/AlSb HEMT Ka-band low-noise amplifier

The first antimonide-based compound semiconductor (ABCS) MMIC, a Ka-Band low-noise amplifier using 0.25-/spl mu/m gate length InAs/AlSb metamorphic HEMTs, has been fabricated and characterized on a 75 /spl mu/m GaAs substrate. The compact 1.1 mm/sup 2/ three-stage Ka-band LNA demonstrated an average of 2.1 dB noise-figure between 34-36 GHz with an associated gain of 22 dB. The measured dc power dissipation of the ABCS LNA was an ultra-low 1.5 mW per stage, or 4.5 mW total. This is less than one-tenth the dc power dissipation of a typical equivalent InGaAs/AlGaAs/GaAs HEMT LNA. Operation with degraded gain and noise figure at 1.1 mW total dc power dissipation is also verified. These results demonstrate the outstanding potential of ABCS HEMT technology for mobile and space-based millimeter-wave applications.     

12~18 GHz GaAs MMIC低噪声放大器设计

采用GaAs工艺设计了一个12~18 GHz毫米波单片集成电路(MMIC)低噪声放大器(LNA)。采用三级单电源供电放大结构,运用最小噪声匹配设计、共轭匹配技术和负反馈结构,同时满足了噪声系数、增益平坦度和输出功率等要求。仿真表明：在12~18 GHz的工作频带内,噪声系数为1.15~1.41 dB,增益为27.9~29.1 dB,输出1 dB压缩点达到15 dBm,输入、输出电压驻波比(VSWR)系数小于1.72。     

MMIC family for DBS down-converter with pulse-doped GaAs MESFETs

A monolithic microwave integrated circuit (MMIC) family was demonstrated as a low-noise block (LNB) downconverter for use in direct broadcast satellite (DBS) receivers operating from 11.7 to 12 GHz. A 12-GHz low-noise amplifier (LNA), a 12-GHz mixer (MIX), a 10.7-GHz dielectric resonator oscillator (DRO), and a 1-GHz IF amplifier (IFA) were designed with GaAs MMIC technology. These MMIC chips were designed to form a complete LNB downconverter function with the exception of the dielectric resonator. The most significant result of this work is that practical low-noise performance can be achieved without the use of high-electron-mobility transistors (HEMTs) in a preceding stage of the MMIC LNB downconverter. Almost noise-free satellite broadcast TV pictures were seen by using a parabolic antenna, 40 cm in diameter, without needing any additional circuit adjustment