发布求助
文献互助 智能选刊 最新文献

WAMICON 2011 Conference Proceedings最新文献

筛选
英文 中文
Fabrication of high quality factor RF-solenoids using via structures 利用通孔结构制造高质量因数射频螺线管
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872901
R. Kamali-Sarvestani, John D. Williams
{"title":"Fabrication of high quality factor RF-solenoids using via structures","authors":"R. Kamali-Sarvestani, John D. Williams","doi":"10.1109/WAMICON.2011.5872901","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872901","url":null,"abstract":"High quality factor inductors are key components in RF-circuits. Fabrication of on-chip coils is costly and suffers from low Q-factor. Design, simulation, and fabrication of novel off-chip solenoid inductors with high quality factor are reported. Minimum feature size of standard PCB fabrication has been used to make embedded solenoids in Duroid substrate with 2.2 relative permittivity. A solenoid turn included two imbedded copper via of 125 µm radius and two surface conductors of 250 µm wide to shape a rectangular coil. Different pitch sizes, conductor lengths, solenoid heights, and numbers of turns were simulated and fabricated. The maximum quality factor was 160 for a 500 µm pitch size and 1 mm conductor length in a substrate of 380 µm thick. In addition to the very high Q-factor, the inductor benefits from facilitated design and ease of fabrication. Analytical design has been investigated by a lumped circuit model and electromagnetic simulation. The result of S-parameter measurements was in close agreement with the designed circuit. The micro-solenoids had a higher quality factor compared to all other counterparts.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129732008","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: 3
New figures of merit qualifying devices and amplifiers, operating in switched mode 在开关模式下工作的合格器件和放大器的新数字
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872910
Ajib Bahi, M. Villegas, A. Diet, G. Baudoin
{"title":"New figures of merit qualifying devices and amplifiers, operating in switched mode","authors":"Ajib Bahi, M. Villegas, A. Diet, G. Baudoin","doi":"10.1109/WAMICON.2011.5872910","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872910","url":null,"abstract":"In the context of mobile communication and connectivity system evolution, new transmitter architectures should be studied in order to design nomadic multiradio low consumption transceiver. In term of efficiency, the most important element is the amplifier. In order to obtain high efficiency performance, it is possible to use several architectures associated with switched amplifier. In this paper, we propose different figures of merit established from DC characteristics of a device used in switched mode. We confirmed the validity of this methodology by designing several class E amplifiers using P-HEMT depletion transistor. And, we propose a representation of the device potential by using the performance factor.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133346324","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
Mobile WiMAX throughput and delay measurements in railroad environment 铁路环境下的移动WiMAX吞吐量和时延测量
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/wamicon.2011.5872855
P. Mahasukhon, H. Sharif, M. Hempel, Tao Ma, Pradhumna Lal Shrestha
{"title":"Mobile WiMAX throughput and delay measurements in railroad environment","authors":"P. Mahasukhon, H. Sharif, M. Hempel, Tao Ma, Pradhumna Lal Shrestha","doi":"10.1109/wamicon.2011.5872855","DOIUrl":"https://doi.org/10.1109/wamicon.2011.5872855","url":null,"abstract":"The railroad industry in North America is heavily involved in improving the broadband wireless connectivity of their railroad operations. We propose our approach of establishing a Mobile WiMAX test bed as a part of our collaborations with the Federal Railroad Administration (FRA) for investigating the performance of current and upcoming broadband wireless technologies in a railroad environment. The focus is on studying the impact of mobility on the wireless system throughput for moving trains at high velocities. Our goal is to provide a comprehensive measurement that will assist others in understanding Mobile WiMAX performance and guiding future network deployment. In this paper, we describe details of our test bed and discuss test results obtained from our laboratory and test bed. Based on our measurements, we can achieve a throughput of approximately 2.8 Mbps downlink and 2 Mbps uplink with the most robust modulation scheme, a maximum distance of 7.5 kilometers, and a speed of 60 mph, making Mobile WiMAX a promising candidate for large-scale deployments in environments such as the railroad industry.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122158619","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
100W X-band GaN SSPA for medium power TWTA replacement 100W x波段GaN SSPA，用于替代中功率TWTA
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872886
M. Casto, Mark Lampenfeld, Pengcheng Jia, Patrick G. Courtney, Scott Behan, Paul Daughenbaugh, R. Worley
{"title":"100W X-band GaN SSPA for medium power TWTA replacement","authors":"M. Casto, Mark Lampenfeld, Pengcheng Jia, Patrick G. Courtney, Scott Behan, Paul Daughenbaugh, R. Worley","doi":"10.1109/WAMICON.2011.5872886","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872886","url":null,"abstract":"This paper reports an X-band solid-state power amplifier with an initial output power of 180W at 9.5 GHz and greater than 100 watts measured over an 8 to 11 GHz bandwidth after burn-in. These SOA results were achieved by combining 16 GaN amplifier modules in a low-loss spatial power combiner network. The combining structure has shown a port to port loss of 0.25–0.75 dB from 8GHz to 12 GHz. The 16-way combiner demonstrates an overall combining efficiency of 90%. The size of the 16-way amplifier/combiner is 2.2″ dia. x 6″ length. This work represents the widest bandwidth operation of a GaN combiner technology to applications at X-band, and establishes new levels of power and efficiency for solid-state power amplifiers operating at these bandwidths.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"216 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122177419","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: 26
A Mirror Predistortion linear power amplifier 一种镜面预失真线性功率放大器
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872885
Khaled Fayed, A. Zaghloul, A. Ezzeddine, Ho-Chung Huang
{"title":"A Mirror Predistortion linear power amplifier","authors":"Khaled Fayed, A. Zaghloul, A. Ezzeddine, Ho-Chung Huang","doi":"10.1109/WAMICON.2011.5872885","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872885","url":null,"abstract":"We propose a new type of predistortion linearization technique: “Mirror Predistortion”. In a regular predistortion power amplifier (PA), the AM-AM and AM-PM distortion (Or IMD3, Third Order Inter-modulation Distortion, and IMD5) of the PA are not known before measurement. In the Mirror Predistortion technique, we choose a PA with identical design as, but smaller than the main PA, as a Mirror Predistorter (PD). Since this Mirror PD's nonlinear characteristics tracks the main PA, there is no need for nonlinear characterization for the PD or the PA. We have reduced this concept to practice and have built a mirror predistortion linear PA having 23 dB improvement in IMD3, at a 2-tone total output power of 34 dBm, with 7.5 dB back off from P1dB of 41.5dBm.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129294566","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: 3
Comparison of barium strontium titanate varactors on magnesium oxide and alumina substrates 钛酸锶钡变容剂在氧化镁和氧化铝基体上的比较
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872902
T. Price, T. Weller, Ya Shen, X. Gong
{"title":"Comparison of barium strontium titanate varactors on magnesium oxide and alumina substrates","authors":"T. Price, T. Weller, Ya Shen, X. Gong","doi":"10.1109/WAMICON.2011.5872902","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872902","url":null,"abstract":"A comparison of tunability and nonlinearity of planar (interdigital) barium strontium titanate varactors fabricated on magnesium oxide (MgO) and alumina substrates is presented. The results show that higher tunability is obtained on alumina than on MgO substrates. Two-tone measurements reveal that the devices fabricated on alumina exhibit more nonlinearity than those fabricated on MgO at relatively high RF power levels. The observed geometry-dependence of the non-linear performance is discussed.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":" 19","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132187714","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: 6
High efficiency RF pulse width modulation with tunable load network class-E PA 具有可调负载网络的高效射频脉宽调制e级PA
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872869
M. Ozen, C. M. Andersson, M. Thorsell, K. Andersson, N. Rorsman, C. Fager, M. Acar, M. van der Heijden, R. Jos
{"title":"High efficiency RF pulse width modulation with tunable load network class-E PA","authors":"M. Ozen, C. M. Andersson, M. Thorsell, K. Andersson, N. Rorsman, C. Fager, M. Acar, M. van der Heijden, R. Jos","doi":"10.1109/WAMICON.2011.5872869","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872869","url":null,"abstract":"In this paper, a 10 W peak power 2 GHz highly efficient RF pulse width modulation (RF-PWM) based transmitter is presented. RF-PWM signals are generated with a dedicated 65 nm CMOS modulator and subsequently amplified with a GaN Class-E power amplifier (PA). The modulator use extended drain MOS (EDMOS) high voltage transistors to provide the required voltage swing to drive the GaN used as a switch. The imaginary load impedance of the Class-E is electronically tunable and is implemented with in-house high breakdown voltage SiC varactors. The tunable imaginary load impedance enables optimization of the Class-E versus the duty cycle (pulse width). The peak efficiency is therefore preserved over a wide range of output power levels. The measured drain efficiency of the Class-E output stage is above 70% over a 6.5 dB output power dynamic range. The overall transmitter efficiency is above 60% for the same dynamic range.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130766264","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: 10
Standing-wave transmission-line-resonator VCO for E-band Applications e波段应用的驻波传输线谐振器压控振荡器
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872878
M. Li, R. Amaya, A. Momciu
{"title":"Standing-wave transmission-line-resonator VCO for E-band Applications","authors":"M. Li, R. Amaya, A. Momciu","doi":"10.1109/WAMICON.2011.5872878","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872878","url":null,"abstract":"In this paper, a fully integrated 42-GHz VCO in 90 nm CMOS is described. This VCO is designed for use in licensed E-band (i.e., 81–86 GHz) transceiver systems. In contrast to conventional LC-VCO topologies, a standing wave transmission line resonator instead of a lumped LC tank is employed to provide an extended output frequency range and relatively low phase noise. A slow wave coplanar waveguide (CPW) structure was used as the transmission line to reduce conductor and radiation losses and to minimize substrate attenuation. Both simulation and chip measurements show good VCO performance. Wide tuning range (1.7-GHz) and low phase noise (−102-dBc/Hz at 1MHz) were achieved. The paper also discusses design criteria and testing strategies.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123698559","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: 3
Thermal analysis and validation of packaging for 100W and higher GaN MMIC power amplifiers 100W及以上GaN MMIC功率放大器封装热分析与验证
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872896
M. Harris, B. Wagner, W. Tong, H. Menkara, S. Halpern
{"title":"Thermal analysis and validation of packaging for 100W and higher GaN MMIC power amplifiers","authors":"M. Harris, B. Wagner, W. Tong, H. Menkara, S. Halpern","doi":"10.1109/WAMICON.2011.5872896","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872896","url":null,"abstract":"We have developed a thermal analysis methodology, packaging design process and validation procedure demonstrating that GaN power amplifiers, having greater than 100W of RF output power, can be managed thermally in practical higher level assemblies. Microscopic and macroscopic models were used to evaluate performance. Novel thermal dissipation test structures were designed, fabricated and measured at dissipation densities of greater than 15,000W/cm2 of active area.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129816924","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: 2
An alternative approach of operating a passive RFID device embedded on metallic implants 操作嵌入在金属植入物上的无源RFID设备的替代方法
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872852
Xiaoyu Liu, R. Yalamanchili, A. Ogirala, M. Mickle
{"title":"An alternative approach of operating a passive RFID device embedded on metallic implants","authors":"Xiaoyu Liu, R. Yalamanchili, A. Ogirala, M. Mickle","doi":"10.1109/WAMICON.2011.5872852","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872852","url":null,"abstract":"This paper presents a method of using volume conduction for communication with implanted passive RFID devices. Generating mainly electric field through human tissue, this method can reduce the interference with metallic implants when RFID devices are attached to the implants. Exterior and interior electrodes are designed for efficient energy and signal transmission. Experiments with a saline box are conducted to study the signal attenuation through biological tissue and the feasibility of using volume conduction for RFID devices close to in vivo metallic materials.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117208491","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: 5
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书