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WAMICON 2011 Conference Proceedings最新文献

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Miniaturized half-mode substrate integrated waveguide bandpass filters using cross-shaped fractals 使用十字形分形的小型化半模基板集成波导带通滤波器
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872877
V. Sekar, K. Entesari
{"title":"Miniaturized half-mode substrate integrated waveguide bandpass filters using cross-shaped fractals","authors":"V. Sekar, K. Entesari","doi":"10.1109/WAMICON.2011.5872877","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872877","url":null,"abstract":"This paper presents a novel miniaturization technique for half-mode substrate integrated waveguide (HMSIW) bandpass filters using cross-shaped fractal structures. The overall filter area is reduced by 28% and 37% compared to conventional HMSIW bandpass filters when the first and second iterations of the cross-shaped fractals are used, respectively. In addition, the miniaturized filters exhibit lower insertion losses because the measured resonator unloaded quality factor increases from 221 for a conventional HMSIW resonator, to 258 and 264 for the first and second fractal iterations, respectively. To make the filter compact, a novel capacitive coupling mechanism is introduced in this work that results in improved upper stopband rejection due to a transmission zero above the filter passband. Two-pole, 4.5% Chebyshev bandpass filter prototypes with center frequency of 1.15 GHz are designed and fabricated on Rogers RT/Duroid 6010LM substrate. The filters have measured insertion losses <1 dB and return losses better than 11 dB, and are very suitable for compact wireless communication systems.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"3 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":"129062145","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
Consideration of higher frequency bands in accurate millimeter-wave FMCW-radar system simulations for automotive applications 汽车用毫米波fmcw雷达系统精确仿真中更高频段的考虑
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872879
M. Dudek, D. Kissinger, R. Weigel, G. Fischer
{"title":"Consideration of higher frequency bands in accurate millimeter-wave FMCW-radar system simulations for automotive applications","authors":"M. Dudek, D. Kissinger, R. Weigel, G. Fischer","doi":"10.1109/WAMICON.2011.5872879","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872879","url":null,"abstract":"In this paper we demonstrate the necessity of taking harmonic bands into account when performing accurate simulations for millimeter-wave frequency-modulated continuous-wave (FMCW) radar systems. Especially under nonlinear conditions when harmonics are generated and influence the signal quality of target detection the higher frequency bands cannot be neglected anymore. In ordinary complex baseband simulations, that are considered as a means to keep the amount of data low in FMCW radar simulations, previous knowledge is needed to explicitly model the impact of effects in higher frequency bands on the specific circuit. Our approach takes the effects of multiples of the actual operating frequency into account, thus enabling higher accuracy while keeping the amount of data moderate. As an example for the capability of this simulation approach a scenario is calculated showing the difference between both simulation strategies.","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":"131304734","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
Throughput analysis in Aeronautical Data Networks 航空数据网络的吞吐量分析
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872890
Yufeng Wang, M. C. Erturk, H. Arslan, R. Sankar, S. Morgera
{"title":"Throughput analysis in Aeronautical Data Networks","authors":"Yufeng Wang, M. C. Erturk, H. Arslan, R. Sankar, S. Morgera","doi":"10.1109/WAMICON.2011.5872890","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872890","url":null,"abstract":"The advances in signal processing, rapid-prototyping and an insatiable consumer demand for wireless connectivity is opening a new paradigm of data service, “Aeronautical Data Networks (ADN)”. The desire is to provide low delay and cost effective data network not only for an aeronautical platform, but also terrestrial networks by using aeronautical platforms as a backbone. An aeronautical station could be a commercial plane, a helicopter or any other very low orbit station i.e., Unmanned Air Vehicle (UAV), High Altitude Platform (HAP). In this paper, we investigate aeronautical broadband wireless access scheme to provide a ADN capacity analysis. First the geometry and connectivity of an ADN is investigated to present the parameters that effects the throughput of an ADN. Then the network throughput analysis based on finding the maximum number of concurrent successful transmissions method is done to provide an upper bound for the throughput of ADN. Simulation results are presented and it is shown that the analytically derived upper bound is tight under the condition that the aeronautical stations are independent and identically distributed (i.i.d.) over the ADN. Numerical results for various possible scenarios depending on ADN geometry are also presented.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"26 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":"134052446","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
Compact dual-band Wilkinson power divider using lumped component resonators and open-circuited stubs 紧凑型双频威尔金森功率分压器使用集总分量谐振器和开路存根
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872900
Zhebin Wang, J. Jang, Chan-Wang Park
{"title":"Compact dual-band Wilkinson power divider using lumped component resonators and open-circuited stubs","authors":"Zhebin Wang, J. Jang, Chan-Wang Park","doi":"10.1109/WAMICON.2011.5872900","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872900","url":null,"abstract":"In this paper, we employ a simple Pi-shaped microstrip line structure using lumped component resonators to design a dual-band Wilkinson power divider. This structure is based on the prototype of the conventional Wilkinson power divider working at higher frequency f1. In order to obtain good performance at lower frequency f2 as well, we added open-circuited stubs connected with resonators on the initial circuit. Further, one of the open-circuited stubs can be shared with adjacent Pi-shaped circuit and all of the stubs are putted inside of the divider, compactness is kept efficiently. The Simulation results by employing 2.5D EM simulator are in good agreement with measured results.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"6 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":"122944311","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
1kW S-band Solid State radar amplifier 1kW s波段固态雷达放大器
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872866
Ju-Young Kwack, Ki-Won Kim, Samuel Cho
{"title":"1kW S-band Solid State radar amplifier","authors":"Ju-Young Kwack, Ki-Won Kim, Samuel Cho","doi":"10.1109/WAMICON.2011.5872866","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872866","url":null,"abstract":"A GaN based highly integrated Solid State Power Amplifier (SSPA) is developed for S-band radar applications. The power amplifier delivers more than 1 KW within a 400 MHz bandwidth with 55 dB gain and a typical 34% PAE. The SSPA includes a negative voltage supply, sequential bias circuit, and temperature sensor circuit. Its compact and lightweight design is suitable for many radar applications.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"51 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":"114590201","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: 13
A highly linear and tunable feed forward current source active inductor in 65nm CMOS technology for mobile applications 一个高度线性和可调的前馈电流源有源电感在65nm CMOS技术的移动应用
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872909
F. Robert, P. Cathelin, A. Die, M. Villegas, F. Epifano, P. Triaire, G. Baudoin
{"title":"A highly linear and tunable feed forward current source active inductor in 65nm CMOS technology for mobile applications","authors":"F. Robert, P. Cathelin, A. Die, M. Villegas, F. Epifano, P. Triaire, G. Baudoin","doi":"10.1109/WAMICON.2011.5872909","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872909","url":null,"abstract":"This paper focuses on a differential tunable active inductor in CMOS 65nm process. This tunable differential active inductor is showing some high linearity and high quality factor (Q>1000) taking into account a wide input power range (−40 to 0dBm). The device is designed, simulated and layouted to be used in the frame of cellular transceivers for mobile applications. The feed-forward current source method “FFCS” was chosen to improve the linearity of a nominal structure. Two active inductors are designed (0.8 and 1.1nH) at mobile cellular frequencies. This paper leads to show the potential and the interest of using such inductors in different modules of a reconfigurable transceiver.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"4 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":"128184508","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
Comparison of tethered and untethered helmet mounted fNIR systems for TBI application TBI应用中系留与非系留头盔fNIR系统的比较
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872873
E. Sultan, A. Khwaja, K. Manseta, Y. Mallalah, Q. Zhang, L. Najafizadeh, Amir Gandjbakhche, K. Pourrezaei, Afshin S. Daryoush
{"title":"Comparison of tethered and untethered helmet mounted fNIR systems for TBI application","authors":"E. Sultan, A. Khwaja, K. Manseta, Y. Mallalah, Q. Zhang, L. Najafizadeh, Amir Gandjbakhche, K. Pourrezaei, Afshin S. Daryoush","doi":"10.1109/WAMICON.2011.5872873","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872873","url":null,"abstract":"Blast or accident related damages to brain leads to traumatic brain injury (TBI) and early detection of TBI and its severity avoids disability. Broadband near-infrared spectroscopy system of 30-1000 MHz provides accurate functional imaging that could be instrumental in diagnosis of any TBI. This paper addresses design challenges and performance comparison of helmet mounted broadband functional near infra-red (fNIR) designs of both tethered and un-tethered communications with a remote analysis unit. Performance comparison of both systems in terms of size, power consumption, and data throughput are discussed and merits of the tethered and untethered helmet mounted broadband fNIR is discussed. The photon migration of NIR light is accomplished using broadband optical transmitters and reception of diffused photons at various positions on head that are 1.5 cm away from each individual optical transmitter. Optical transmitter and receiver are custom designed to perform photon migration spectroscopy through head and brain at wavelengths of 680nm, 780nm, 820nm, and 980nm. The untethered helmet structure consists of RF electronic for reception of UWB signals of 4.5–5.5GHz and transmission of 50Mb/s data after local signal processing of the received diffused photons. Low frequency electrical connections using microcoax are employed for interfacing the broadband 30–1000MHz reference source to the multi-wavelength optical transmitters and process the received RF signal component of diffused photon density waves.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"18 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":"126587959","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
Monte-Carlo stability analysis of microwave amplifiers 微波放大器的蒙特卡罗稳定性分析
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872888
J. Collantes, N. Otegi, A. Anakabe, N. Ayllon, A. Mallet, G. Soubercaze-Pun
{"title":"Monte-Carlo stability analysis of microwave amplifiers","authors":"J. Collantes, N. Otegi, A. Anakabe, N. Ayllon, A. Mallet, G. Soubercaze-Pun","doi":"10.1109/WAMICON.2011.5872888","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872888","url":null,"abstract":"Pole-zero identification is being increasingly used as a method to analyze the stability of microwave circuits. However, in its current form, the stability analysis through pole-zero identification relies on a quality assessment that is based on visual inspection. This implies a manual approach that limits in practice the handling of a large amount of data as in the case of a yield or sensitivity analysis. Here, an automated methodology based on pole-zero identification is applied to the stability evaluation in the context of a Monte-Carlo analysis. The methodology is based on an algorithm that prevents the adverse effects due to undermodeling and overmodeling on the stability criteria. The approach is illustrated through its application to two in-home built amplifier prototypes: a medium power band L FET amplifier exhibiting a low frequency oscillation and a SiGe HBT reconfigurable amplifier for Wifi/Wimax applications that shows an undesired frequency division for some particular input drive conditions.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"310 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":"123219573","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
Development of broadband amplifier based on GaN HEMTs 基于GaN hemt的宽带放大器的研制
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872894
Song Lin, M. Eron, S. Turner
{"title":"Development of broadband amplifier based on GaN HEMTs","authors":"Song Lin, M. Eron, S. Turner","doi":"10.1109/WAMICON.2011.5872894","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872894","url":null,"abstract":"Two types of broadband amplifier based on GaN HEMTs are presented in this paper. The feedback amplifier design has achieved over 42 dB gain with ± 1.75 dB flatness and higher than 32 dBm P1dB over 30 MHz to 4 GHz. Both theoretical predictions and measurement results will be presented. This PA was designed and fabricated using discrete GaN transistor die with chip & wire technology. The distributed amplifier design is optimized to achieve greater than 38 dBm of P1dB output power with higher than 15 dB linear gain, while having good port match and better than ± 1 dB gain flatness over 20 MHz to 6 GHz.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"128 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":"123132224","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: 8
Miniaturization of microstrip square open loop resonators using surface mount capacitors 微带方形开环谐振器表面贴装电容器的小型化
WAMICON 2011 Conference Proceedings Pub Date : 2011-04-18 DOI: 10.1109/WAMICON.2011.5872899
Luís Ledezma, T. Weller
{"title":"Miniaturization of microstrip square open loop resonators using surface mount capacitors","authors":"Luís Ledezma, T. Weller","doi":"10.1109/WAMICON.2011.5872899","DOIUrl":"https://doi.org/10.1109/WAMICON.2011.5872899","url":null,"abstract":"A miniaturization technique for microstrip square open loop resonators is presented in this paper. The method is based on the capacitive loading of the resonators. The effect of this technique on the coupling between resonators is studied as well as the effect on the quality factor of each resonator. A 1 GHz bandpass filter is designed, simulated, and built in order to test this technique. The final prototype has an area of 20% that of a filter using conventional square open loop resonators.","PeriodicalId":253374,"journal":{"name":"WAMICON 2011 Conference Proceedings","volume":"181 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":"123347983","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
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