2007 IEEE/MTT-S International Microwave Symposium最新文献

{"title":"Including Quantum Effects in Electromagnetic System--An FDTD Solution to Maxwell-Schrödinger Equations","authors":"W. Sui, Jing Yang, X. Yun, Chao Wang","doi":"10.1109/MWSYM.2007.380200","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380200","url":null,"abstract":"In this paper a novel approach to include quantum effects, described by Schrodinger equation in tempo and spatial domains, into electromagnetic system analysis, which uses an extended finite-difference time-domain (FDTD) technique to solve the Maxwell's equations. An iterative numerical scheme that marches in time provides a complete solution that describes the interactions between electromagnetic field and electron movement under quantum effects. An example is given to include electron tunneling current through a potential barrier and the good agreement between the extended FDTD method and the analytical solution proves its accuracy. This technique is expected to become an important tool analyzing nanoscale circuit.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128899163","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}

{"title":"Low-Loss Low-Cost All-Silicon CMOS NLTLs for Pulse Compression","authors":"M. Li, R. Amaya, J. Duchamp, P. Ferrari, R. Harrison, N. G. Tarr","doi":"10.1109/MWSYM.2007.380485","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380485","url":null,"abstract":"This paper discusses the design of all-silicon pulse-compression nonlinear transmission lines (NLTLs), using a standard 0.18-mum CMOS process. Two different types of varactors based on NMOS transistors are investigated. One type is used in a single-edge, the other in a double-edge pulse-sharpener NLTL. To reduce the loss caused by conductive silicon substrate, a slow-wave transmission line technique is used. A measured S21 loss of only 0.25 dB/mm at 40 GHz is achieved. Both NMOS varactor and slow-wave coplanar-waveguide (CPW) transmission-line components for use in NLTL designs were fabricated and on-chip measurements were made. Transient simulations based on the measurements show a leading edge rise time reduction of 75% for single-edge, and 60% for double-edge pulse sharpening.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130645906","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}

{"title":"Analysis and Measurement of Spurious Emission and Phase Noise Performance of an RF All-Digital Phase Locked Loop using a Frequency Discriminator","authors":"C. Wicpalek, T. Mayer, L. Maurer, U. Vollenbruch, Y. Liu, A. Springer","doi":"10.1109/MWSYM.2007.380398","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380398","url":null,"abstract":"A frequency discriminator in all-digital phase locked loops (ADPLLs) for RF-synthesis has to fulfill several tough requirements. The most important requirements are the in-band phase noise performance and knowledge about offset frequencies of the spurious emissions, because the ADPLL should fulfill several wireless communication standard requirements like UMTS and GSM. This paper presents a theoretical derivation, simulative analysis, and measurement results for the in-band phase noise level and the offset frequencies of spurious emissions of an ADPLL with a two-bit Frequency Discriminator implemented in a standard 0.13 mum CMOS technology","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"58 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130743792","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}

{"title":"Characterizing and Modeling Conductor-backed CPW Periodic Band Stop Filter with Miniaturized Size","authors":"Kaixue Ma, S. Xiao, Kien Teck Chan, K. Yeo, Jianguo Ma, M. Do","doi":"10.1109/MWSYM.2007.380184","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380184","url":null,"abstract":"A novel band stop filter with mutually coupled dual spiral configuration on conductor-backed coplanar waveguide (CBCPW) is proposed and investigated. A circuit model is introduced to investigate the characteristics of proposed circuits. The model-based results, full-wave EM simulation results and the experiment results are matched well. The periodic band stop filters are designed and fabricated by using thin-film technology. The size of filter is only 2.3 mmtimes1.0 mm.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"19 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133009491","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}

{"title":"A MEMS-Tunable Frequency-Selective Surface Monolithically Integrated on a Flexible Substrate","authors":"G. Coutts, R. Mansour, S. Chaudhuri","doi":"10.1109/MWSYM.2007.380516","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380516","url":null,"abstract":"A MEMS-tunable conformal frequency-selective surface (FSS) monolithically integrated onto a novel bulk micromachined rigid-flex Kapton substrate has been fabricated and tested. The FSS structure switches between the Ku and Ka bands with good correlation between simulated and measured results. In addition to added reconfigurablility for multi-band reflector antennas, the structure facilitates MEMS-based tunable conformal radomes capable of high-frequency operation in the Ka band and beyond.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130959865","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}

{"title":"A 400 MHz Hyperthermia System using Rotating Spiral Antennas for Uniform Treatment of Large Superficial and Sub-Surface Tumors","authors":"O. Arabe, P. Maccarini, E. Jones, G. Hanna, T. Samulski, M. Dewhirst, D. Thrall, P. Stauffer","doi":"10.1109/MWSYM.2007.380458","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380458","url":null,"abstract":"Numerous studies have shown that hyperthermia can significantly increase the tumor-killing effects of radiation therapy and/or chemotherapy. Superficial tumors are usually treated with waveguide-based systems operating at 915 MHz which do not heat evenly or deeply enough for typical disease that spreads below and across the skin surface. A 400 MHz system that has been shown capable of treating somewhat larger and deeper volumes in previous animal and human clinical trials is investigated in this effort with the intent to further improve the technology. Real-time temperature, oxygen, and power reflection coefficient measurements are added for accurate control and deposition of the prescribed thermal dose while also assessing physiological response of the treated area. The heating performance of three spiral antenna applicators is evaluated in two ways. First the power deposition pattern is simulated with Ansoft HFSS for a single stationary microstrip spiral applicator radiating into muscle tissue. Next the power deposition averaged over one cycle of rotation is simulated with Ansoft HFSS for a single asymmetrically rotated spiral, and for larger heating patterns an asymmetrically rotated two antenna spiral array. To verify the simulations, the power deposition pattern of the largest dual spiral scanning applicator was evaluated in a muscle equivalent tissue phantom using infrared imaging of a 'split-phantom' load and the results compared to the HFSS simulated patterns. The data show that these spiral antennas heat uniformly above 50% of the maximum heating rate just beyond the perimeter of the scanning or fixed spiral structure, producing for the largest dual spiral a 17 cm diameter region at a depth of 3 cm. The results of a previous human clinical trial using these spiral applicators is presented along with our plans to optimize the applicator in terms of real time control and extent of heating based on new HFSS modeling and thermal analysis tools.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130263712","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}

{"title":"Low-Voltage GaInP/GaAs HBT Wideband Gilbert Downconverter Using Transformer RF Balun","authors":"S. Tseng, C. Meng, Chih-Kai Wu, G. Huang","doi":"10.1109/MWSYM.2007.380350","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380350","url":null,"abstract":"This paper demonstrates a low-voltage wideband downconverter along with an integrated transformer RF balun using the 2-mum GalnP/GaAs HBT technology. This transformer is a symmetric type and plays a role as a single-to-differential balun. Without the parasitics between the transformer and the substrate, the transformer can work at higher frequencies. This transformer downconverter operates from 1.5 GHz to 14 GHz with around 20-dB conversion gain and 1.8-GHz IF 3-dB bandwidth. The frequency range of the mixing operation is wide and covers the digital video broadcasting via satellite (DVB-S) bands. This mixer hence is useful for DVB-S applications. Since there is no dc voltage drop on the transformer, the voltage supply of the mixer core is only 2.4 V and the current consumption is approximately 8.6 mA. The chip size of the entire mixer is 1 mm times 1 mm while the transformer occupies the estate of 150 mum times 150 mum.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125498144","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}

{"title":"Piezoelectric Transducer-Controlled Reconfigurable Dual-Mode Switchable Bandpass Filter","authors":"Wen‐Hua Tu, S. Hsu, K. Chang","doi":"10.1109/MWSYM.2007.380234","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380234","url":null,"abstract":"A piezoelectric transducer-controlled reconfigurable dual-mode bandpass filter is introduced. A piezoelectric transducer is used to lift up or pull down the attached dielectric substrate perturber. When the attached dielectric substrate is totally pulled down, slightly lifted up, or totally lifted up, the dual-mode bandpass filter has an elliptic-function response, an isolation of more than 25 dB, or a Chebyshev-function response, respectively. A full-wave simulator is used to predict the filter performance, and the simulated results agree well with the measured ones.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123349955","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}

{"title":"Microwave Device Modeling Using Space-Mapping and Radial Basis Functions","authors":"Slawomir Koziel, J. Bandler","doi":"10.1109/MWSYM.2007.380079","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380079","url":null,"abstract":"A novel surrogate modeling methodology is presented that utilizes space mapping combined with radial basis function interpolation. The method has advantages both over the standard space mapping modeling methodology and the recently published space mapping modeling with variable weight coefficients. In particular, it provides accuracy comparable or better than the latter method and computational efficiency as good as the standard space mapping modeling procedure. Examples illustrating the performance of the new modeling method as well as a comparison with previously published approaches are given.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126229500","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}

{"title":"Realization of Ultra-Compact Planar Microstrip Branch-Line Couplers With High-Impedance Open Stubs","authors":"Ching‐Wen Tang, Mingguang Chen, Janne-Wha Wu","doi":"10.1109/MWSYM.2007.380223","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380223","url":null,"abstract":"The ultra-compact microstrip branch-line couplers are proposed in this paper. Using the provided criteria to shorten the lengths of four quarter-wavelength transmission lines, the sizes of branch-line couplers can be greatly miniaturized. In this study, the reduction rate of the proposed couplers' sizes are over 88.9% and 76.8% using approaches with the pi-model and the T-model, respectively. Moreover, the measured frequency and phase responses show good agreement with the electromagnetic simulated results.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121464984","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}