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A sub-resonant 40GHz clock distribution network with near zero skew 近零偏斜的40GHz次谐振时钟分配网络
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5518128
F. Aryanfar, Ting Wu, M. Koochakzadeh, C. Werner, Ken Chang
{"title":"A sub-resonant 40GHz clock distribution network with near zero skew","authors":"F. Aryanfar, Ting Wu, M. Koochakzadeh, C. Werner, Ken Chang","doi":"10.1109/MWSYM.2010.5518128","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5518128","url":null,"abstract":"A sub-resonant mm-wave clock distribution network is presented. The proposed solution introduces near zero skew while consumes significantly less power than alternative approaches such as mesh networks. The clock distribution network was implemented using the TSMC 40nm LP CMOS process and measured using a 4-port vector network analyzer. It measures sub-psec skew from 36.6 to 40.2GHz with less than 20% power penalty compared to resonant solutions.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114201786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Waveguide design for bi-modal operation of THz quantum cascade lasers 太赫兹量子级联激光器双峰工作的波导设计
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5514815
S. G. Razavipour, S. Fathololoumi, G. Rafi, D. Ban, S. Safavi-Naeini, S. Laframboise, Z. Wasilewski, H. Liu
{"title":"Waveguide design for bi-modal operation of THz quantum cascade lasers","authors":"S. G. Razavipour, S. Fathololoumi, G. Rafi, D. Ban, S. Safavi-Naeini, S. Laframboise, Z. Wasilewski, H. Liu","doi":"10.1109/MWSYM.2010.5514815","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5514815","url":null,"abstract":"The design and fabrication of a bi-modal semi-insulating surface-plasmon waveguide for a quantum cascade laser emitting at 3.75 THz is presented. Different transverse modes are excited under different electric current injection due to their different overlapping with the laterally nonuniform gain profile in the active region. HFSS and COMSOL program are used to simulate the near/far field and waveguide loss for various waveguide structures, respectively. It is found that a 150 µm wide surface-plasmon waveguide allows either co-excitation or selective excitation of the first two transverse modes. The total optical loss (i.e., the combination of waveguide and mirror loss) is found below 20 cm−1. An electrically controllable dynamic beam pattern steering is predicted. The near field and far field measurements of a fabricated quantum cascade laser device confirm the theoretical results. The dynamic switching of far-field beam pattern by an angle of 25° is observed when the injected current density changes from 1.9 kA/cm2 to 2.3 kA/cm2.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114715801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sub-millimeter and far-infrared technology in the Herschel Space Observatory and beyond 亚毫米和远红外技术在赫歇尔空间天文台和超越
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5518193
J. Pearson
{"title":"Sub-millimeter and far-infrared technology in the Herschel Space Observatory and beyond","authors":"J. Pearson","doi":"10.1109/MWSYM.2010.5518193","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5518193","url":null,"abstract":"The electromagnetic spectrum at wavelengths longer than 50 microns (∼6 THz), contains approximately half the total power emitted in the Universe since the big bang. Additionally, the spectral region also contains the boundary between the dust being optically thick and optically thin, as well as numerous transitions of atoms and molecules which can be used to study the physical, chemical and structural details of the interstellar medium. The majority of this spectral region is completely obscured from the surface of the Earth, due to absorption of water vapor in the atmosphere. The space environment offers a unique opportunity to observe the far infrared sky without atmospheric opacity or excess thermal emission. The Herschel Space Observatory is the first major facility operating in the far infrared. The Herschel instruments and their technology and optimization are presented along with a brief outline of the future developments needed in far infrared space sensors for astrophysics.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114877382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Use of ground planes within the spatial images technique: Application to the analysis of rectangular multilayered shielded enclosures 空间图像技术中地平面的使用:在矩形多层屏蔽罩分析中的应用
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5515036
J. S. Gómez-Díaz, M. García-Vigueras, D. Cañete-Rebenaque, F. Quesada-Pereira, Alejandro Álvarez Melcón
{"title":"Use of ground planes within the spatial images technique: Application to the analysis of rectangular multilayered shielded enclosures","authors":"J. S. Gómez-Díaz, M. García-Vigueras, D. Cañete-Rebenaque, F. Quesada-Pereira, Alejandro Álvarez Melcón","doi":"10.1109/MWSYM.2010.5515036","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5515036","url":null,"abstract":"The use of ground planes is proposed inside the spatial images technique in order to calculate the multilayered shielded Green's functions for rectangular enclosures. The positions of the ground planes are dynamically located, covering two walls of the cavity, as a function of the source position. Spatial mirror images, related to the ground planes, are used to perfectly impose the boundary conditions along these cavity walls. This completely removes the problems associated to the singular behavior of the source when it is placed close to a wall or a corner, improving numerical stability. In addition, the method leads to a very efficient computation (about 15 times faster than the original approach), due to the reduced number of non-mirror images that must be effectively computed. A multi-band filter in hybrid waveguide-microstrip technology is analyzed with the new method, showing excellent agreement with measured data.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113938075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Analysis of plasmon excited by Metal-Insulator-Metal structure with insulator thickness of hundreds of nanometers 金属-绝缘体激发等离子体的分析-绝缘体厚度为数百纳米的金属结构
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5515132
M. Tamura, H. Kagata
{"title":"Analysis of plasmon excited by Metal-Insulator-Metal structure with insulator thickness of hundreds of nanometers","authors":"M. Tamura, H. Kagata","doi":"10.1109/MWSYM.2010.5515132","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5515132","url":null,"abstract":"This paper presents the analysis of plasmon excited by Metal-Insulator-Metal (MIM) structure with insulator thickness of hundreds of nanometers. Since the surface plasmons on each metal excited by the electromagnetic waves that enters the MIM structure is coupled to each other, the incident wave is probably absorbed. At that time, the standing wave is generated in the insulator. We explain the principle of the MIM structure by confirming it with an electromagnetic simulator. We also confirm that the surface plasmon resonant wave is changed by the variation of the insulator thickness. Furthermore, the MIM structure's resonant wavelengths are calculated using a multilayer filter approach and shows good agreement with 3D simulation and measurement.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115156696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
High efficiency 80W X-band power amplifier using coaxial waveguide spatial power combining technique 采用同轴波导空间功率组合技术的高效率80W x波段功率放大器
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5516220
Patrick G. Courtney, T. Tran, Charles Bartak, Scott Behan, Pengcheng Jia
{"title":"High efficiency 80W X-band power amplifier using coaxial waveguide spatial power combining technique","authors":"Patrick G. Courtney, T. Tran, Charles Bartak, Scott Behan, Pengcheng Jia","doi":"10.1109/MWSYM.2010.5516220","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5516220","url":null,"abstract":"As the commercially available microwave monolithic integrated circuit (MMIC) amplifiers improve in output power and bandwidth a compact platform to combine a large number of these MMICs, becomes very desirable. A reduced size version of a coaxial waveguide combiner structure using an antipodal finline antenna array is investigated. The reduced size coaxial waveguide combiner structure is used to demonstrate an 80 Watt power amplifier at X-Band by combining 16, 6 Watt MMIC devices and the scalability of the overall combiner platform. Around 30% efficiency has been achieved for most of the band.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123239752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
High performance wideband digital predistortion platform for 3G+ applications with better than 55dBc over 40 MHz bandwidth 高性能宽带数字预失真平台，适用于3G+应用，在40mhz带宽下优于55dBc
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5518033
A. Kwan, O. Hammi, M. Helaoui, F. Ghannouchi
{"title":"High performance wideband digital predistortion platform for 3G+ applications with better than 55dBc over 40 MHz bandwidth","authors":"A. Kwan, O. Hammi, M. Helaoui, F. Ghannouchi","doi":"10.1109/MWSYM.2010.5518033","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5518033","url":null,"abstract":"In this paper, a hardware-software system is proposed for the wideband characterization and linearization of power amplifiers exhibiting memory effects. The designed prototype includes a signal generation and a feedback paths for applications in the 1GHz to 2.5GHz frequency band and supports instantaneous bandwidths of up to 60MHz. The hardware platform is coupled with a software interface that implements the required data processing algorithms for the synthesis of the digital predistortion function. Experimental validation is carried out on a 3G power amplifier driven by an eight-carrier WCDMA signal. The digital predistortion is implemented using the twin-nonlinear two-box model with only 30 parameters and leads to a better than 55dBc ACLR for an input signal having 40MHz instantaneous bandwidth. To the best of the authors' knowledge this represents the best digital predistortion performances in terms of bandwidth and complexity.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123711496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
A novel Zigbee-based low-cost, low-power wireless EKG system 一种新型的基于zigbee的低成本、低功耗无线心电图系统
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5514960
V. Mukala, V. Lakafosis, A. Traille, M. Tentzeris
{"title":"A novel Zigbee-based low-cost, low-power wireless EKG system","authors":"V. Mukala, V. Lakafosis, A. Traille, M. Tentzeris","doi":"10.1109/MWSYM.2010.5514960","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5514960","url":null,"abstract":"Electrocardiogram (EKG) monitoring is of prime importance in the medical world. Using the state of art technology to take it to a wireless platform can open up a broad spectrum of wireless medical devices which have a wide range of applications in medical services, military rescue missions, home cardiovascular monitoring, especially for senior people. This paper presents a platform for developing a Zigbee based low cost, low power Wireless EKG system using the unlicenced 2.4GHz ISM band. Zigbee is based on IEEE 802.15.4 standard for Wireless Personal Area Networks (WPANs), that is being used in many commercial and research applications today, where it has become an attractive solution for low power and low cost applications. Two system designs are proposed featuring excellent ranges and potential for “smart fabric” wearable implementations.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124934159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
A novel methodology for fast harmonic-load control with a passive tuner and an active loop 一种采用无源调谐器和有源环路的快速谐波负载控制新方法
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5517560
S. Bonino, V. Teppati, A. Ferrero
{"title":"A novel methodology for fast harmonic-load control with a passive tuner and an active loop","authors":"S. Bonino, V. Teppati, A. Ferrero","doi":"10.1109/MWSYM.2010.5517560","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5517560","url":null,"abstract":"In this paper we introduce a novel technique to overcome the drawbacks of passive tuners and active loops when characterizing very high power transistors and amplifiers. The methodology combines a passive tuner and an active loop, the former used to tune the fundamental output impedance of a device under test, the latter exploited to change the harmonic termination. Since the passive tuner changes also the harmonic load in an unpredictable way, we present for the first time a method to quickly find the correct settings for the active loop to achieve the desired harmonic load. This methodology, is simple to implement, relatively quick, and does not imply long system pre-calibration time when changing the characterization frequency.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123554408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
30.3% PAE HBT Doherty power amplifier for 2.5∼2.7 GHz mobile WiMAX 用于2.5 ~ 2.7 GHz移动WiMAX的30.3% PAE HBT Doherty功率放大器
2010 IEEE MTT-S International Microwave Symposium Pub Date : 2010-05-23 DOI: 10.1109/MWSYM.2010.5517709
D. Kang, Jinsung Choi, Dongsu Kim, Daekyu Yu, K. Min, Bumman Kim
{"title":"30.3% PAE HBT Doherty power amplifier for 2.5∼2.7 GHz mobile WiMAX","authors":"D. Kang, Jinsung Choi, Dongsu Kim, Daekyu Yu, K. Min, Bumman Kim","doi":"10.1109/MWSYM.2010.5517709","DOIUrl":"https://doi.org/10.1109/MWSYM.2010.5517709","url":null,"abstract":"The Doherty power amplifier for mobile WiMAX application is fully integrated in 1.2×1.2 mm2 using a 2-µm InGaP/GaAs HBT process. The direct input power dividing technique is employed on a chip. Broadband input and output matching techniques are used for broadband Doherty operation. A 1.5 times larger peaking amplifier than carrier amplifier is used to have high efficiency for IEEE 802.16e m-WiMAX signal, which has 9.6 dB crest factor and 8.75 MHz bandwidth. The PA with a supply voltage of 3.4V has an EVM of 2.3% and a PAE of 31.5% at an output power of 24.75 dBm and an operating frequency of 2.6 GHz. The PAE of over 30.3% and the output power of over 24.6 dBm with the EVM of lower than 3.15% and the gain variation of 0.2 dB are achieved across 2.5∼2.7 GHz without any assistant technique for linearization.","PeriodicalId":341557,"journal":{"name":"2010 IEEE MTT-S International Microwave Symposium","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114959272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
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