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ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)最新文献

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Carbon monoxide detection using passive and active millimetre wave radiometry 采用被动和主动毫米波辐射测量法进行一氧化碳检测
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895736
N. Salmon, R. Appleby
{"title":"Carbon monoxide detection using passive and active millimetre wave radiometry","authors":"N. Salmon, R. Appleby","doi":"10.1109/ICMMT.2000.895736","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895736","url":null,"abstract":"This paper investigates the use of the rotational molecular resonance lines of carbon monoxide for the detection of this gas. Active and passive techniques are investigated, concluding that a passive technique is feasible but that an active technique is not. The passive technique would use a three channel spectral radiometer tuned on and around the resonance line. Concentrations of 10 parts per million could be detected over a path length of 100 m. Such a system could be incorporated into a passive millimetre wave imager to detect and measure remotely concentrations of carbon monoxide. Using active techniques, it is shown that modulated radiation temperature changes are too small to be measured using radiometry.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114570977","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
Ferrite-tuned filter Ferrite-tuned过滤器
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895634
Maolin Zheng, Guihe Chen
{"title":"Ferrite-tuned filter","authors":"Maolin Zheng, Guihe Chen","doi":"10.1109/ICMMT.2000.895634","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895634","url":null,"abstract":"In this paper ferrite-tuned filter designs are described. The YIG sphere and design parameters are described also. This filter covered the frequency range 250 to 800 MHz. The insertion loss was 8 dB with off-resonance isolation of 75 dB. The /spl Delta/f/sub 3dB/ is greater than 5 MHz. The temperature operating range is -40 to +70/spl deg/C.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590222","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
Electromagnetic scattering from composite periodic arrays of cylindrical objects 圆柱形物体复合周期阵列的电磁散射
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895683
K. Yasumoto, T. Kushta, K. Yoshitomi
{"title":"Electromagnetic scattering from composite periodic arrays of cylindrical objects","authors":"K. Yasumoto, T. Kushta, K. Yoshitomi","doi":"10.1109/ICMMT.2000.895683","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895683","url":null,"abstract":"A very efficient and accurate method to characterize the electromagnetic scattering from two-dimensional periodic arrays of composite cylindrical objects is presented, using the lattice sums formula and the aggregate T-matrix for cylindrical structures. The method is quite general and applies to various configurations of two-dimensional periodic arrays. The unit cell of the array can contain two or more cylinders, which may be dielectric, conductor, gyrotropic medium, or their mixture with different sizes.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122550479","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
One novel single-patch dual-frequency planar inverted-F antenna 一种新型单贴片双频平面反f天线
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895716
Wang Yajun, Lee Ching Kwang
{"title":"One novel single-patch dual-frequency planar inverted-F antenna","authors":"Wang Yajun, Lee Ching Kwang","doi":"10.1109/ICMMT.2000.895716","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895716","url":null,"abstract":"This paper presents a novel planar inverted-F antenna (PIFA) with a single probe-feed that can operate at two discrete resonant frequencies in a single patch. By displacing the probe-feed from the two principle axes of the rectangular patch, both compactness and dual-frequency operation can be realized. Such a new antenna provides good impedance matching and wide impedance bandwidth at each resonant frequency. Characteristics and discussions are addressed.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122796006","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
Waveform measurement technique and its applications to optimum loading studies on power FETs 波形测量技术及其在功率场效应管最佳负载研究中的应用
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895775
C. Wei, Y. Tkachenko, D. Bartle
{"title":"Waveform measurement technique and its applications to optimum loading studies on power FETs","authors":"C. Wei, Y. Tkachenko, D. Bartle","doi":"10.1109/ICMMT.2000.895775","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895775","url":null,"abstract":"Microwave waveform measurement techniques on power transistors and power amplifiers are reviewed. Techniques of both low-impedance technique in a load-pull system and high-impedance internal node probing, including calibration approaches are presented. Applications of the low-impedance waveform technique are demonstrated in finding the optimum harmonic loads of power PHEMTs to achieve best power added efficiency (PAE). Measured versus simulated results show very good agreement and therefore verify the measurement technique. It has been shown that as high as 83% power added efficiency can be achieved under the inverse-F harmonic loading condition. Also the good agreement of high-impedance probing on a GSM power amplifier with simulated results validates the internal-node probing technique.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129587952","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
Semi-disc microstrip patch antenna with dual-frequency operation 双频工作的半圆盘微带贴片天线
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895691
Wang Yajun, Lee Ching Kwang, Anyong Qing
{"title":"Semi-disc microstrip patch antenna with dual-frequency operation","authors":"Wang Yajun, Lee Ching Kwang, Anyong Qing","doi":"10.1109/ICMMT.2000.895691","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895691","url":null,"abstract":"A modified semi-disc microstrip patch antenna with dual-frequency operation is addressed. Incorporating two symmetrical thin slots and a shorting-pin, this novel antenna achieves both compactness and dual-frequency operation with wide impedance bandwidth at each resonance. The design and characteristics of the antenna are presented and discussed. Comparison with a normal shorted semi-disc MPA without slots is also addressed.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129929496","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 new linearity enhancing technique for ultra-wide dynamic range low noise amplifiers 一种用于超宽动态范围低噪声放大器的线性度增强新技术
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895643
Beom-Yo Ko, Jin-Su Ko, Hyun-seok Kim, Byeong-ha Park
{"title":"A new linearity enhancing technique for ultra-wide dynamic range low noise amplifiers","authors":"Beom-Yo Ko, Jin-Su Ko, Hyun-seok Kim, Byeong-ha Park","doi":"10.1109/ICMMT.2000.895643","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895643","url":null,"abstract":"This paper presents a new linearity enhancing technique for design of LNAs (Low Noise Amplifiers) which require high linearity and low power consumption for CDMA mobile station applications. In order to verify the feasibility of the proposed scheme over the conventional scheme, four different low noise amplifiers for 9000 MHz and 1.85 GHz applications have been designed, fabricated and measured using 0.5 /spl mu/m BiCMOS technology. The measured results of both 900 MHz and 1.85 GHz LNAs show that the proposed scheme consumes less than 50% of power that is required with conventional scheme, while maintaining comparable gain and linearity. Specifically, a 900 MHz LNA has NF of 1.65 dB, transducer power gain (S/sub 21/) of 16.5 dB and IIP3 of +3 dBm including gain controllability with power consumption of only 21 mW (3 V) using maximum f/sub T/ of 15 GHz BiCMOS technology.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"123 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129203583","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 steady-state analysis of microwave oscillators 微波振荡器的稳态分析
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895646
J. Dobes
{"title":"A steady-state analysis of microwave oscillators","authors":"J. Dobes","doi":"10.1109/ICMMT.2000.895646","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895646","url":null,"abstract":"Software predicting the steady-state of microwave oscillators is proposed. The method is based on an effective conjunction of the /spl epsiv/-algorithm with a detection of an unknown period using derivatives of an output. Necessary estimate of the /spl epsiv/-algorithm's level may be done in a nonstandard way using a distribution of poles of a hypothetical transfer function. An accuracy of the analyses is increased by a refinement of the GaAs FET standard model. The steady-state algorithm and an improved GaAs FET model were implemented and tested by means of author's CIA (Circuit Interactive Analyzer) program using real data given by a tunable oscillator.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127725743","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
A solution for the nonlinearity of LFM-CW system LFM-CW系统非线性的一种解
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895771
X. Lu, Zhen Wang, Ming-hua Xue
{"title":"A solution for the nonlinearity of LFM-CW system","authors":"X. Lu, Zhen Wang, Ming-hua Xue","doi":"10.1109/ICMMT.2000.895771","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895771","url":null,"abstract":"Linear FM-CW (LFM-CW) is widely used in pulse compression radar, but on occasion the linearity of the sweeping source could not meet the application's require. This paper proposes an algorithm, through which the effect of nonlinearity in the LFM-CW system is eliminated.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124495644","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
Imaging of buried objects by microwave tomography method in conditions of low reflection on surface medium 地表介质低反射条件下地埋物的微波层析成像
ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364) Pub Date : 2000-09-14 DOI: 10.1109/ICMMT.2000.895762
A. Vertiy, S. Gavrilov, S. Aksoy
{"title":"Imaging of buried objects by microwave tomography method in conditions of low reflection on surface medium","authors":"A. Vertiy, S. Gavrilov, S. Aksoy","doi":"10.1109/ICMMT.2000.895762","DOIUrl":"https://doi.org/10.1109/ICMMT.2000.895762","url":null,"abstract":"One of the most important problems for imaging of buried objects by the microwave tomography method is reflection from the surface. Experiments show that the level of surface reflection is very large. Because of this large reflection from surface, it is very hard to obtain images from weakly scattered objects like mines etc. if they are buried close to surface. This paper shows that if the incident wave is arranged at the Brewster angle, surface reflection is decreased and the imaging by the microwave tomography method of buried weakly scattered objects like mines etc. is better than at non Brewster angle.","PeriodicalId":354225,"journal":{"name":"ICMMT 2000. 2000 2nd International Conference on Microwave and Millimeter Wave Technology Proceedings (Cat. No.00EX364)","volume":"11 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120998677","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
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