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

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Antenna Array Detection in Highly Cluttered Environment Using Time Reversal Method 基于时间反转方法的高杂波环境下天线阵检测
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380062
Yi Jiang, D. Stancil, Jian-Gang Zhu
{"title":"Antenna Array Detection in Highly Cluttered Environment Using Time Reversal Method","authors":"Yi Jiang, D. Stancil, Jian-Gang Zhu","doi":"10.1109/MWSYM.2007.380062","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380062","url":null,"abstract":"This paper concerns a method of target detection in a cluttered environment where a significantly large number of highly reflective scattering objects exists. With the conventional Radar detection, the detection of a target additional to this highly scattering environment would suffer greatly in their detection dynamic range. In this paper, we present a novel time reversal method that enables automatic destructive interference of the field-probing electromagnetic wave on the reflective scatters of the environment such that the cluttered environment becomes virtually transparent. The experiment in lab tree-scattering environment demonstrates that this time reversal clutter-nulling scheme substantially enhances the detection dynamic range and the signal-to-noise ratio, significantly raising target detectability.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"19 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":"125207314","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
A Two-Dimensional Beam Scanning Antenna Array Using Composite Right/Left Handed Microstrip Leaky-Wave Antennas 一种采用复合左/右微带漏波天线的二维波束扫描天线阵列
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380139
Dongkyu Lee, Sanghyo Lee, C. Cheon, Y. Kwon
{"title":"A Two-Dimensional Beam Scanning Antenna Array Using Composite Right/Left Handed Microstrip Leaky-Wave Antennas","authors":"Dongkyu Lee, Sanghyo Lee, C. Cheon, Y. Kwon","doi":"10.1109/MWSYM.2007.380139","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380139","url":null,"abstract":"In this work, we demonstrated a novel 2-dimensional beam scanning antenna array at a fixed frequency. For a beam scanning in E-plane, a microstrip leaky wave antenna based on a composite right/left handed transmission line structure loading voltage-controlled tuning elements was designed. Measured results show a wide scanning range from -39deg to +60deg at 8.5 GHz. Also a Rotman lens was designed to give additional beam scanning capability in orthogonal direction. Combining these two 1-dimensional scanning methods, a 2-dimensional beam scanning antenna array was implemented on a single substrate in a planar form. Measured results show wide scanning ranges from -33deg to 45deg and -15deg to 15deg in E-plane and H-plane, respectively. To the best of our knowledge, this is the first demonstration of 2-dimensional beam scanning array using leaky wave antennas at a fixed frequency.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"48 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":"131003346","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
Multi-Bandpass Filters Using Multi-Armed Open Loop Resonators with Direct Feed 多臂开环谐振器直接馈入的多带通滤波器
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380129
M. Awida, A. Boutejdar, A. Safwat, H. El-Hennawy, A. Omar
{"title":"Multi-Bandpass Filters Using Multi-Armed Open Loop Resonators with Direct Feed","authors":"M. Awida, A. Boutejdar, A. Safwat, H. El-Hennawy, A. Omar","doi":"10.1109/MWSYM.2007.380129","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380129","url":null,"abstract":"A novel type of multi-bandpass filters is proposed. The idea of the proposed filters is to engineer the transmission band using multi-reject band resonators, which are implemented using multi-armed open loop resonators that are directly coupled to the input/output ports. Each resonator pair of arms creates a reject band in the transmission response. By properly adjusting the multi-reject bands, appropriate multi transmission bands are created. The idea was verified by designing three different filters with multi-bandpass response. The designed and fabricated filters have compact size with good agreement between the measured and simulated responses.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"280 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133350760","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: 27
TEM Mode-Matching Analysis of Multi-coupled Strip-line Filters 多耦合带线滤波器的TEM模式匹配分析
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380546
J. Ruiz‐Cruz, Yunchi Zhang, J. Rebollar, K. Zaki, J. R. Montejo-Garai, A. Piloto
{"title":"TEM Mode-Matching Analysis of Multi-coupled Strip-line Filters","authors":"J. Ruiz‐Cruz, Yunchi Zhang, J. Rebollar, K. Zaki, J. R. Montejo-Garai, A. Piloto","doi":"10.1109/MWSYM.2007.380546","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380546","url":null,"abstract":"The analysis of multi-coupled strip-line filters by the mode-matching method is studied for different input/output excitations. The aim is to compare the computational effort of two different options and to propose the most suitable formulation for the design of some strip-line filters. It is shown that a suitable segmentation of the structure is essential for obtaining good numerical results. In fact, if the optimum segmentation is selected, a mode-matching analysis using only TEM modes can resemble the full-wave response, with shorter computation time. Hence, this approach can be very useful in design and different examples are shown to validate it, using other numerical methods and measurements of a ten order filter.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"38 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":"133625133","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
Rigorous Mode Matching Method for Circular to Off-Centre-Rectangular Side-Coupled Waveguide Junctions 圆-偏心矩形边耦合波导结的严格模式匹配方法
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380186
Jingliang Zheng, Ming Yu
{"title":"Rigorous Mode Matching Method for Circular to Off-Centre-Rectangular Side-Coupled Waveguide Junctions","authors":"Jingliang Zheng, Ming Yu","doi":"10.1109/MWSYM.2007.380186","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380186","url":null,"abstract":"An accurate and efficient method for analyzing circular to multiple off-center rectangular side-coupled waveguide T-junctions is developed based on a rigorous Mode Matching technique. The method is very general and not limited by symmetry or other dimensional constrains to the junction. The new way to match field on the curved interface between subregions is described in detail. The computer code developed based on this theory is highly efficient. The numerical results match with the measured results as well as the results obtained by other methods.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"1 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":"128853750","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
Microwave Dissipation Spectra in Arrays of Silicon Nanowires 硅纳米线阵列中的微波耗散谱
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380071
M. Lee, C. Highstrete, A. Vallett, S. Dilts, J. Redwing, T. Mayer
{"title":"Microwave Dissipation Spectra in Arrays of Silicon Nanowires","authors":"M. Lee, C. Highstrete, A. Vallett, S. Dilts, J. Redwing, T. Mayer","doi":"10.1109/MWSYM.2007.380071","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380071","url":null,"abstract":"The transmission and reflection scattering parameters of arrays of silicon nanowires (SiNWs) directly assembled onto co-planar waveguides (CPWs) have been measured from 0.1 to 50 GHz at room temperature. Typical arrays consisted of between 103 to 104 SiNWs aligned parallel to the electric field polarization of the propagating microwave field. Scattering parameters were measured on CPWs both before and after nanomaterial assembly. Highly reproducible CPW characteristics and careful use of control samples to quantify systematic reproducibility allowed clear separation of nanomaterial effects from the characteristics of the bare CPWs. Arrays of n doped SiNWs consistently showed frequency-dependent power dissipation. Nominally undoped SiNW arrays, however, showed no measurable microwave power dissipation up to 50 GHz.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"85 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":"127723158","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
Measurements of the Surface Resistance and the Effective Conductivity of Copper Cladded Laminates Employing Dielectric Resonator Technique 用介电谐振器技术测量包铜层板的表面电阻和有效电导率
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380521
J. Krupka
{"title":"Measurements of the Surface Resistance and the Effective Conductivity of Copper Cladded Laminates Employing Dielectric Resonator Technique","authors":"J. Krupka","doi":"10.1109/MWSYM.2007.380521","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380521","url":null,"abstract":"Dielectric resonator technique has been proposed for precise measurements of the effective conductivity of the inner and the outer surface of copper cladding of microwave laminates. Experiments have shown that the effective conductivity of the inner metal surface is about 4 times smaller than the effective conductivity of the outer metal surface for copper-cladded RT/Duroid.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"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":"127830904","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: 11
A New DC-Offset and I/Q-Mismatch Compensation Technique for a CMOS Direct-Conversion WLAN Transmitter 一种用于CMOS直接转换WLAN发射机的直流偏置和I/ q错配补偿新技术
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380260
K. Yanagisawa, N. Matsuno, T. Maeda, S. Tanaka
{"title":"A New DC-Offset and I/Q-Mismatch Compensation Technique for a CMOS Direct-Conversion WLAN Transmitter","authors":"K. Yanagisawa, N. Matsuno, T. Maeda, S. Tanaka","doi":"10.1109/MWSYM.2007.380260","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380260","url":null,"abstract":"This paper presents a novel DC-offset and I/Q-mismatch compensation technique with short convergence time, high accuracy, and low-circuit-complexity. In this technique, all kinds of transmitter nonidealities, i.e. an offset and a mismatch, can be detected using adequate pair of DC test signals. The test signals are designed so that the envelope of the modulator RF outputs for each test signal fluctuates when the offset or mismatch exists. The fluctuations are converted to a baseband signal using an envelope detector which is designed as a signal dynamic range compressor to avoid saturation in following stages. The polarity of this fluctuation is detected by a comparator instead of a multi-bit analog to digital converter, and a binary-search-type algorithm optimizes parameters for the offset and mismatch compensation using the 1-bit comparator output. This technique was demonstrated in a 0.18-mum CMOS 5-GHz-band WLAN transmitter. The DC offset was suppressed to -43 dBc and the image tone was suppressed to -49 dBc.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"18 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":"127831739","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
Synthesis of Broadband Negative Group Delay Active Circuits 宽带负群延迟有源电路的合成
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380357
Blaise Ravelo, A. Pérennec, M. Roy
{"title":"Synthesis of Broadband Negative Group Delay Active Circuits","authors":"Blaise Ravelo, A. Pérennec, M. Roy","doi":"10.1109/MWSYM.2007.380357","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380357","url":null,"abstract":"This paper deals with the design and synthesis of active circuits able to simultaneously produce negative group delay and gain at microwave frequencies or for baseband signals. Analytical equations show that the proposed topology meets these objectives while also satisfying active device requirements. Then, a synthesis approach is extracted and applied to design a two-stage microwave circuit, further validated by experimental results. This method is extended to the design of a four-stage baseband active circuit providing gain and negative group delay up to 600 MHz. A high relative time-advance is evidenced by time-domain simulations.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"18 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":"115373467","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: 69
Double-Lorentz Transmission Line Metamaterial and its Application to Tri-Band Devices 双洛伦兹传输线超材料及其在三波段器件中的应用
2007 IEEE/MTT-S International Microwave Symposium Pub Date : 2007-06-03 DOI: 10.1109/MWSYM.2007.380500
A. Rennings, T. Liebig, C. Caloz, I. Wolff
{"title":"Double-Lorentz Transmission Line Metamaterial and its Application to Tri-Band Devices","authors":"A. Rennings, T. Liebig, C. Caloz, I. Wolff","doi":"10.1109/MWSYM.2007.380500","DOIUrl":"https://doi.org/10.1109/MWSYM.2007.380500","url":null,"abstract":"A double-Lorentz (DL) transmission line (TL) metamaterial is proposed for the first time. Both effective material parameters mueff and epsiveff of the corresponding line exhibit a Lorentz-type dispersion, hence the proposed terminology double-Lorentz. This type of TL presents the interest of being intrinsically tri-band, while the previously reported composite right/left-handed TL metamaterial is only dual-band. The DL TL theory is fully derived and demonstrated experimentally by a microstrip implementation. The tri-band property of the DL TL is illustrated by the design of a tri-band lambda/4 impedance transformer and a systematic design procedure is described.","PeriodicalId":213749,"journal":{"name":"2007 IEEE/MTT-S International Microwave Symposium","volume":"6 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":"115672717","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: 32
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