基于45 nm SOI工艺的超宽带毫米波单刀双掷开关的设计北大核心CSCD

提出了基于GlobalFoundries 45nm SOI工艺的布局紧凑的宽带毫米波单刀双掷开关。设计包括了采用串并结构的全频段单刀双掷开关以及采用两级晶体管并联的Ka波段通带单刀双掷开关。设计中采用共面波导串联短截线,实现小尺寸的电感。此外,利用负体偏置技术提高了开关在毫米波波段的性能。设计的单刀双掷开关芯片核心面积为0.35mm×0.16mm。测量结果显示全频段单刀双掷开关在DC^94GHz的插入损耗小于4dB,隔离度大于24dB,而Ka波段通带单刀双掷开关在25~45GHz的插入损耗为2.5~3.2dB,隔离度大于19dB。     

宽带pin二极管单刀双掷开关的设计与实现

采用两个pin二极管设计、仿真,制作了一个8～20 GHz并联结构的高功率容量的单刀双掷开关。首先通过采用一个新的电路结构,该电路结构除了传统的并联pin单刀双掷开关结构外,还有微带线匹配电路部分,克服了并联结构单刀双掷开关难以实现大的带宽的缺点。然后选择合适的二极管,根据其参数,建立开路、短路等效电路模型;利用Ansoft Designer软件对电路进行了仿真和优化。最后根据优化结果制作并测试了单刀双掷开关。该单刀双掷开关插入损耗在频率8～20 GHz内小于1.7 dB,在频率8～15 GHz内小于1.5 dB;开关隔离度在整个频带内大于21 dB;在14 GHz耐功率容量大于10 W(CW)。     

C波段GaAs PIN二极管单片单刀单掷开关

基于中国科学院微电子研究所的GaAs PIN二极管工艺,研究了一种单片单刀单掷开关.为了仿真该单片单刀单掷开关,研制开发了GaAs PIN二极管的小信号模型.在5.5～7.5GHz的频段内,开关正向导通时的插入损耗低于1.6dB,回波损耗大于10dB,开关关断状态的隔离度大于23dB.     

C波段GaAs PIN二极管单片单刀单掷开关

基于中国科学院微电子研究所的GaAs PIN二极管工艺,研究了一种单片单刀单掷开关.为了仿真该单片单刀单掷开关,研制开发了GaAs PIN二极管的小信号模型.在5.5～7.5GHz的频段内,开关正向导通时的插入损耗低于1.6dB,回波损耗大于10dB,开关关断状态的隔离度大于23dB.     

X-波段MEMS单刀双掷开关的研究

利用X-波段MEMS单刀单掷膜开关和成熟的微带线技术设计了一种X-波段MEMS单刀双掷膜开关,其模拟结果为;阈值电压为19V左右,工作频率为8～12GHz,在中心频率（10GHz）处,导通开关的插入损耗为-0．2dB,截止开关的隔离度为-21dB,开关的回波损耗为-43dB。     

带有直流偏置的毫米波单刀双掷开关仿真与设计

采用阶跃阻抗传输线和扇形微带短截线,实现了单刀双掷开关的直流偏置,使直流支路与毫米波支路之间的隔离度大于30dB,带宽超过25%,在中心频率30GHz附近回波损耗大于40dB。采用这种直流偏置电路和PIN梁式引线二极管,基于LTCC工艺对单刀双掷开关串联结构进行仿真。设计结果表明在28.5～31.5GHz频率范围内,串联开关的插入损耗小于1.5dB,回波损耗大于15dB,隔离度大于20dB。     

1~26.5GHz GaAs PIN单刀单掷开关单片

采用GaAs PIN二极管,完成1~26.5 GHz的单刀单掷开关单片的设计、制作。SPST开关单片带内插损小于0.5 dB,驻波优于1.1,隔离度大于27 dB,在10~26.5 GHz,隔离度大于37 dB。开关单片采用MOCVD生长的GaAs纵向PIN二极管材料结构,76 mm GaAs圆片工艺加工制作。     

基于Q-MMIC技术的W波段低成本PIN管开关

采用低成本方法设计了一款W波段单刀单掷开关。通过在单独加工的石英基片无源电路上安装倒装PIN管,获得了一款W波段准毫米波单片（Q-MMIC）开关。为了获得低损耗、高隔离度性能,开关设计中采用了3-D PIN管模型和电路补偿结构。测试结果表明开关在88GHz时插入损耗最小,最小值为0.5dB;在80-101 GHz频率范围内,开关导通时的插入损耗小于2 dB;在84-104 GHz频率范围内,开关隔离度大于30 dB。整个开关电路尺寸为1.5 mm× 3.0 mm。     

基于Q-MMIC技术的W波段低成本PIN管开关（英文）

采用低成本方法设计了一款W波段单刀单掷开关.通过在单独加工的石英基片无源电路上安装倒装PIN管,获得了一款W波段准毫米波单片(Q-MMIC)开关.为了获得低损耗、高隔离度性能,开关设计中采用了3-D PIN管模型和电路补偿结构.测试结果表明开关在88 GHz时插入损耗最小,最小值为0.5 dB;在80~101 GHz频率范围内,开关导通时的插入损耗小于2 dB;在84~104 GHz频率范围内,开关隔离度大于30 dB.整个开关电路尺寸为1.5 mm×3.0 mm.     

单刀多掷PIN天线转换开关

本文是关于微波单刀十六掷开关的总结报告,其中包括开关和波导—连接器的基本组成和工作原理以及开关和连接器的特性。单刀十六掷开关是波导型的组合件,由二十个单刀单掷开关和五个波导—同轴连接器组成,工作在X波段,正偏导通时,导通电流为65毫安,反偏关闭时关闭电压为负4.5伏。开关特性:最小隔离大于27dB,最大插损小于1.8dB,驻波比小于1.3,承受平均功率10瓦,带宽±50MHz,使用管子为同轴封装PIN二板管(国产的)。     

Analysis and Design of Bandpass Single-Pole–Double-Throw FET Filter-Integrated Switches

This paper proposes a method to integrate a single-pole - double-throw (SPDT) switch and a quarter-wavelength bandpass filter. A 1-GHz SPDT hybrid switch and a 60-GHz pseudomorphic HEMT monolithic-microwave integrated-circuit SPDT switch with 30% fractional bandwidth are demonstrated. The 1-GHz SPDT switch achieves 1.5-dB insertion loss and 20-dB isolation at center frequency. For the 60-GHz SPDT switch, the measured insertion loss is lower than 2.5 dB and the isolation is higher than 27 dB. The low insertion loss and high isolation show that no performance is degraded when integrating the filter function. The analysis of the power performance is also described. Using the device dc-IV curves, the power compression point can be predicted.     

一种L～E波段的混合型射频MEMS单刀双掷开关设计

针对传统RF MEMS单刀双掷(SPDT)开关应用存在频段低、插入损耗高、隔离度低等问题,设计了一种混合型SPDT开关,通过在一条通路上设置接触式开关和电容式开关,实现了在L～E频段下的低插入损耗和高隔离度。通过设计蛇形上电极结构,降低了上电极的弹性系数,进而降低开关上电极下拉所需的驱动电压。采用HFSS仿真软件对混合型SPDT开关的射频性能参数进行了优化,并利用COMSOL对开关的蛇形上电极进行应力-位移分析。仿真结果表明,在DC～90 GHz的频段下,SPDT开关的插入损耗小于1.5 dB@90 GHz,隔离度大于52 dB@67 GHz、29 dB@90 GHz。此开关适用于无线通信系统、雷达系统和仪器测量系统等对工作频段要求高的领域内。     

A Novel Unit Cell for Active Switches in the Millimeter-Wave Frequency Range

This paper presents a novel transistor unit cell which is intended to realize compact active switches in the high millimeter-wave frequency range. The unit cell consists of the combination of shunt and common gate transistor within a four-finger transistor cell, achieving gain in the amplifying state as well as good isolation in the isolating state. Gate width-dependent characteristics of the unit cell as well as the design of actual switch implementations are discussed in detail. To verify the concept, two switches, a single pole double throw (SPDT) switch and single pole quadruple throw (SP4T) switch, intended for the WR3 frequency range (220–325 GHz) were manufactured and characterized. The measured gain at 250 GHz is 4.6 and 2.2 dB for the SPDT and SP4T switch, respectively. An isolation of more than 24 dB for the SPDT switch and 12.8 dB for the SP4T switch was achieved.     

基于GaAs PIN二极管的宽带大功率单片单刀双掷开关

GaAs PIN二极管具有开态电阻小、截止频率高以及功率容量大的特点,采用GaAs PIN二极管制作的开关插入损耗较小、隔离度较高、并且功率的线性较好。基于河北半导体研究所GaAs PIN工艺制造了一款单刀双掷开关芯片。该开关采用单级并联结构。通过微波在片测试,在小信号条件下,6～18 GHz范围内插入损耗小于1.45 dB、隔离度大于28 dB,输入输出反射损耗小于7.5 dB。把开关装入夹具中进行功率特性测试,在连续波输入功率37 dBm,12 GHz条件下测试输出功率仅压缩0.5 dB,具有非常好的功率特性。在4英寸(100 mm)晶圆上开关的成品率较高,具有非常好的工程应用前景。     

Single-pole-double-throw switch based on toggle switch

A single-pole-double-throw (SPDT) switch based on the toggle switch, a new type of radio frequency (RF) microelectromechanical (MEMS) switch structure for low voltage actuation, high broadband application and enhanced power capability, is presented. Electromagnetic simulation results are discussed and the fabrication process and measurement results are given. The SPDT switch exhibits low insertion loss (<0.5 dB at 20 GHz) and high isolation (>28 dB at 30 GHz).     

A high-performance 40-85 GHz MMIC SPDT switch using FET-integrated transmission line structure

A compact ultra-broadband distributed SPDT switch has been developed using GaAs PHEMTs. An FET-integrated transmission line structure, where the source pad of the shunt FET has been integrated into the signal line while the drain has been grounded to a via-hole with minimum parasitic inductance, has been proposed to extend the operating bandwidth of the distributed switches. SPDT and SPST switches using this structure have been fabricated using a commercial GaAs PHEMT foundry. The SPDT switch showed low insertion loss (<2 dB) and good isolation (>30 dB) over an octave bandwidth from 40 to 85 GHz. At 77 GHz, the SPDT switch showed extremely low insertion loss of 1.4 dB and high isolation of 38 dB. The chip size was as small as 1.45/spl times/1.0 mm/sup 2/. To the best of our knowledge, this is among the best performance ever reported for an octave-band SPDT switch at this frequency range. SPST switch also showed the excellent performance with the insertion loss of 0.4 dB and isolation of 34 dB at 60 GHz.     

基于GaN HEMT的13～17 GHz收发多功能芯片

基于GaN高电子迁移率晶体管(HEMT)工艺设计制作了一款收发(T/R)多功能芯片(MFC),主要用于射频前端收发系统.该芯片集成了单刀双掷(SPDT)开关用于选择接收通道或发射通道工作,芯片具有低噪声性能、高饱和输出功率和高功率附加效率等特点.芯片接收通道的LNA采用四级放大、单电源供电、电流复用结构,发射通道的功率放大器采用三级放大、末级四胞功率合成结构,选通SPDT开关采用两个并联器件完成.采用微波在片测试系统完成该芯片测试,测试结果表明,在13～ 17 GHz频段内,发射通道功率增益大于17.5 dB,输出功率大于12W,功率附加效率大于27％.接收通道小信号增益大于24 dB,噪声系数小于2.7 dB,1 dB压缩点输出功率大于9 dBm,输入/输出电压驻波比小于1.8∶1,芯片尺寸为3.70 mm×3.55 mm.     

Single-pole double-throw CMOS switches for 900-MHz and 2.4-GHz applications on p/sup -/silicon substrates

A 900-MHz single-pole double-throw (SPDT) switch with an insertion loss of 0.5 dB and a 2.4-GHz SPDT switch with an insertion loss of 0.8 dB were implemented using 3.3-V 0.35-/spl mu/m NMOS transistors in a 0.18-/spl mu/m bulk CMOS process utilizing 20-/spl Omega//spl middot/cm p/sup -/ substrates. Impedance transformation was used to reduce the source and load impedances seen by the switch to increase the power handling capability. SPDT switches with 30-/spl Omega/ impedance transformation networks exhibit 0.97-dB insertion loss and 24.3-dBm output P/sub 1dB/ when tuned for 900-MHz operation, and 1.10-dB insertion loss and 20.6-dBm output P/sub 1dB/ when tuned for 2.4-GHz operation. The 2.4-GHz switch is the first bulk CMOS switch which can be used for 802.11b wireless local area network applications.     

Design Considerations for Traveling-Wave Single-Pole Multithrow MMIC Switch Using Fully Distributed FET

The circuit design considerations for the traveling-wave switch (TWSW) single-pole double-throw (SPDT) monolithic microwave integrated circuit (MMIC) utilizing a fully distributed FET (FD-FET) are presented here for the first time. The normalized length of the impedance transformer for a single-pole multithrow TWSW using the FD-FET is found to be less than a quarter-wavelength at the operating frequency. Unlike the TWSW using lumped FETs, the TWSW with the FD-FET offers the advantage of no design limits regarding such frequency characteristics as bandwidth and group delay. The newly developed SPDT TWSW MMIC using the 400-mum-gate finger FD-FET delivers broadband characteristics over more than an octave frequency range with highly reliable MMIC technology. The newly developed SPDT MMIC switch provides low insertion loss of less than 2.1 dB and high isolation of over 25.5 dB from 38 to 80 GHz, coupled with the benefit of very small size     

$Ka$-Band Low-Loss and High-Isolation Switch Design in 0.13-$mu{hbox {m}}$ CMOS

This paper presents designs and measurements of Ka-band single-pole single-throw (SPST) and single-pole double-throw (SPDT) 0.13-CMOS switches. Designs based on series and shunt switches on low and high substrate resistance networks are presented. It is found that the shunt switch and the series switch with a high substrate resistance network have a lower insertion loss than a standard designs. The shunt SPST switch shows an insertion loss of 1.0 dB and an isolation of 26 dB at >35 GHz. The series SPDT switch with a high substrate resistance network shows excellent performance with 2.2-dB insertion loss and isolation at 35 GHz, and this is achieved using two parallel resonant networks. The series-shunt SPDT switch using deep n-well nMOS transistors for a high substrate resistance network results in an insertion loss and isolation of 2.6 and 27 dB, respectively, at 35 GHz. For series switches, the input 1-dB compression point (1P₁) can be significantly increased to with the use of a high substrate resistance design. In contrast, of shunt switches is limited by the self-biasing effect to 12 dBm independent of the substrate resistance network. The paper shows that, with good design, several 0.13- CMOS designs can be used for state-of-the-art switches at 26-40 GHz.