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WAMICON 2011 Conference Proceedings最新文献

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Graphene: Status and prospects as a microwave material 石墨烯:微波材料的现状与前景
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872898
P. Asbeck, Kangmu Lee, J. Moon
{"title":"Graphene: Status and prospects as a microwave material","authors":"P. Asbeck, Kangmu Lee, J. Moon","doi":"10.1109/WAMICON.2011.5872898","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872898","url":null,"abstract":"Graphene offers new opportunities for the optimization of high frequency FETs by virtue of high carrier velocity, excellent scaling properties, configurability as electron or hole channel devices, and limited scattering. It also offers unique features such as quadratic variation of current with gate voltage, and problems, such as limitations in voltage and poor pinchoff characteristics. This paper reviews graphene material properties, and status and prospects of research efforts to demonstrate graphene-based microwave and mm-wave transistors.","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":"130071277","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: 87
Wireless implants for in vivo diagnosis and closed-loop treatment 用于体内诊断和闭环治疗的无线植入物
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872872
J. Chiao, A. Farajidavar, H. Cao, Philip McCorkle, M. Sheth, Young-Sik Seo, Tim Wiggins, Shreyas Tharkar, S. Deb, Smitha M. N. Rao
{"title":"Wireless implants for in vivo diagnosis and closed-loop treatment","authors":"J. Chiao, A. Farajidavar, H. Cao, Philip McCorkle, M. Sheth, Young-Sik Seo, Tim Wiggins, Shreyas Tharkar, S. Deb, Smitha M. N. Rao","doi":"10.1109/WAMICON.2011.5872872","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872872","url":null,"abstract":"In this presentation, we will review and discuss recent advances in the research of wireless telemetry for medical applications in our group at UT-Arlington, particularly those based on a similar platform for in vivo monitoring of physiological parameters. System for recording ECoG signals in brain, recording in vivo gastric myoelectric activities in stomach, sensing in vivo strain variations in bladder, and detecting reflux episodes in esophagus have been demonstrated. These systems consist of passive transducers for physiological signal transduction and an active transceiver for signal relay and recording. The real-time in vivo physiological signal acquisition and related neuro-/gastro-stimulation form a closed loop between the human body and control electronics. Continuous feedback mechanisms that could be implemented in the closed loop provide treatment strategies for optimization to reach a desired comfort level for individual patient. The wireless systems quantitatively document symptoms and associated physiological signals over a long term while allowing the patients to resume regular daily activities. This will enable more precise diagnosis and prognosis of diseases for the caregivers.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"7 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":"126822886","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
Highly dense microwave and millimeter-wave phased array T/R modules using CMOS and SiGe RFICs 采用CMOS和SiGe rfic的高密度微波和毫米波相控阵T/R模块
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872903
Gabriel M. Rebeiz, Kwang-Jin Koh, Tiku Yu, Dong‐Woo Kang, Choul‐Young Kim, Y. Atesal, B. Cetinoneri, Sang Young Kim, K. Ho, Donghyup Shin
{"title":"Highly dense microwave and millimeter-wave phased array T/R modules using CMOS and SiGe RFICs","authors":"Gabriel M. Rebeiz, Kwang-Jin Koh, Tiku Yu, Dong‐Woo Kang, Choul‐Young Kim, Y. Atesal, B. Cetinoneri, Sang Young Kim, K. Ho, Donghyup Shin","doi":"10.1109/WAMICON.2011.5872903","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872903","url":null,"abstract":"We have used silicon technologies to build highly dense phased array for X to W-band applications. Typical designs include an 8-element 8–16 GHz SiGe phased array receiver, a 16-element 30–50 GHz SiGe transmit phased array, a miniature (< 3mm2) and low power (<100 mW) CMOS phased array receiver at 24 GHz, and a 4-element SiGe/CMOS Tx/Rx phased array at 34–38 GHz with 5-bit amplitude and phase control, a 2-antenna 4-simultaneous beam phased array chip at 15 GHz. Also, a miniature 8×8 Butler Matrix with < 3 dB loss in 0.13 um CMOS has been developed for multibeam applications. It is shown that silicon chips can be used to lower the cost of phased arrays with a significant impact at Ku, K and W-band applications where there is so little available space behind each antenna element due to the very small element area.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"127 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":"116205395","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
Compact tri-band notched UWB bandpass filter based on interdigital hairpin finger structure 基于数字间发夹指结构的紧凑型三带陷波超宽带带通滤波器
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872908
Zhebin Wang, F. Nasri, Chan-Wang Park
{"title":"Compact tri-band notched UWB bandpass filter based on interdigital hairpin finger structure","authors":"Zhebin Wang, F. Nasri, Chan-Wang Park","doi":"10.1109/WAMICON.2011.5872908","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872908","url":null,"abstract":"In this paper, a novel compact tri-band notched UWB (Ultra-Wide-Band) bandpass filter is proposed. Based on the interdigital hairpin finger structure, three adjacent folded fingers are added at both sides for tri-band notched control. With this symmetrical structure, each notched band can be controlled by its corresponding pair of folded fingers independently. Without changing other rejected bands, by just changing the parameters of the corresponding pair of fingers, the specified notched band can be adjusted easily. To demonstrate our novel structure, a tri-band notched UWB bandpass filter is designed, fabricated and tested for harmonic control application. At rejected bands 6.42 GHz, 10.7 GHz and 14.98 GHz, the measured insertion loss is 15.7 dB, 31.7 dB and 30.1 dB, respectively. Simulated results are found in good agreement with measured results. The compact size of our proposed filter is 5.8 mm × 19.8 mm.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"13 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":"115260893","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: 9
Digital Signals: How we got here, and where we could get to 数字信号:我们是如何到达这里的，以及我们可以到达哪里
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872889
E. McCune
{"title":"Digital Signals: How we got here, and where we could get to","authors":"E. McCune","doi":"10.1109/WAMICON.2011.5872889","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872889","url":null,"abstract":"This survey examines the bandwidth efficiency of wireless signals, beginning with a review of the Shannon capacity and of the important differences between signal to noise ratio (snr) and individual bit energy to noise density (IBEND = Eb/N0). Recognizing that communication systems are successful only if they are profitable, value propositions that have been realized along the evolution of adopted wireless signals are reviewed. As the market now desires gigabit data rates while mobile, physical principles are used to extend this historical trend to evaluate options for implementation and their inherent costs so that coming value propositions can be fairly evaluated.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"116 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":"128088572","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
High power added efficiency power amplifier with harmonic controlled by UWB filter with notched band at 6.42 GHz 高功率附加效率功率放大器，其谐波由UWB滤波器控制，陷波带为6.42 GHz
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872867
Zhebin Wang, Shengjie Gao, F. Nasri, Chan-Wang Park
{"title":"High power added efficiency power amplifier with harmonic controlled by UWB filter with notched band at 6.42 GHz","authors":"Zhebin Wang, Shengjie Gao, F. Nasri, Chan-Wang Park","doi":"10.1109/WAMICON.2011.5872867","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872867","url":null,"abstract":"A high power added efficiency (PAE) GaN inverse Class F PA (power amplifier) at 2.14 GHz with UWB (Ultra Wideband) bandpass notched filter is designed, fabricated and tested. For this amplifier, second harmonic and fourth harmonic are rejected by the bias circuit, while third harmonic is controlled by a UWB bandpass notched filter and fifth harmonic is tuned by a traditional λ/4 transmission line at 10.7 GHz. By applying this novel filter, third harmonic can be suppressed while for fundamental frequency, the filter works as a 50-Ohm transmission line with little insertion loss. With the interdigital hairpin line structure of the filter, the blocking capacitor is not needed in the load matching network. Compared with the conventional λ/4 transmission line at third harmonic, the size of this amplifier circuit is reduced. The measured PAE is 61.6% with 38.8 dBm output power at 2.14 GHz. The maximum gain is 15.9 dB.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"35 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":"115810296","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: 15
Highly efficient GaN-HEMT power amplifiers at 3.5 GHz and 5.5 GHz 3.5 GHz和5.5 GHz的高效GaN-HEMT功率放大器
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872865
P. Saad, H. Nemati, K. Andersson, C. Fager
{"title":"Highly efficient GaN-HEMT power amplifiers at 3.5 GHz and 5.5 GHz","authors":"P. Saad, H. Nemati, K. Andersson, C. Fager","doi":"10.1109/WAMICON.2011.5872865","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872865","url":null,"abstract":"This paper reports the design, implementation, and experimental results of two high efficiency GaN-HEMT power amplifiers (PAs) at 3.5 GHz and 5.5 GHz. A bare-die approach is used to eliminate package parasitics in conjunction with an in-house transistor model that enables investigation of the transistor intrinsic waveforms. With this as a basis, harmonic source-pull/load-pull simulations have been used to design and implement two state-of-the-art highly efficient harmonically tuned PAs. For the 3.5-GHz PA, large-signal measurement results show a PAE of 80%, a power gain of 15.5 dB, and an output power of 7 W, while for the 5.5-GHz PA, 5.6 W output power, 12.5 dB power gain, and 70% PAE are achieved.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"8 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":"133082498","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
Nuclear magnetic resonance energy harvesting for ultra-low power biomedical implants 超低功耗生物医学植入物的核磁共振能量采集
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872875
W. Turner, Chun-Ming Tang, B. Beck, T. Mareci, R. Bashirullah
{"title":"Nuclear magnetic resonance energy harvesting for ultra-low power biomedical implants","authors":"W. Turner, Chun-Ming Tang, B. Beck, T. Mareci, R. Bashirullah","doi":"10.1109/WAMICON.2011.5872875","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872875","url":null,"abstract":"A selective wirelessly-adjustable multiple-frequency probe (SWAMP) system allows for Nuclear Magnetic Resonance (NMR) imaging and spectroscopy with increased signal sensitivity through the coupling of the NMR surface coil with an implanted system capable of selectively resonating at multiple NMR frequencies. The ability to wirelessly recharge the biomedical implant in the NMR environment allows for long term in vivo operation without the need for surgery to replace the depleted secondary power source. This paper explores the capability of wirelessly recharging and powering the implanted electronics by leveraging the readily available energy from the transmitted RF pulses used for NMR measurements. The wireless power transfer between the NMR and the SWAMP systems are studied and relevant results are reported.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"17 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":"121079238","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
The design and testing challenges of High Voltage RF circuits 高压射频电路的设计和测试挑战
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872887
M. Walden
{"title":"The design and testing challenges of High Voltage RF circuits","authors":"M. Walden","doi":"10.1109/WAMICON.2011.5872887","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872887","url":null,"abstract":"The design and testing challenges of High Voltage RF circuits are discussed with particular reference to a recent Solid State Power Amplifier design. Using a single Si MOSFET device, we were able to produce over 2kW of pulsed power at VHF frequencies.","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":"129482077","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
A framework on wideband sensing and direction finding for location aware public safety cognitive radio 面向位置感知公共安全认知无线电的宽带传感测向框架
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872883
Ali Gorcin, H. Çelebi, K. Qaraqe, H. Arslan
{"title":"A framework on wideband sensing and direction finding for location aware public safety cognitive radio","authors":"Ali Gorcin, H. Çelebi, K. Qaraqe, H. Arslan","doi":"10.1109/WAMICON.2011.5872883","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872883","url":null,"abstract":"Beside providing solutions to the interoperability problem of the first responders, location awareness feature of the cognitive radios can be beneficial for victim and first responder location estimation under extreme conditions. Location and environment based services can be employed to detect and locate victims even when the core wireless communications networks are down. In this paper, a location awareness framework is proposed for victim signal detection and direction estimation. A wideband, multi-channel sensing method is proposed along with a two-antenna multiple signal classification (MUSIC) direction finding algorithm. The performance evaluation of proposed methods are discussed with both simulation and measurement results.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"50 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":"127169446","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
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