Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381343
Wang Yang, Zhang Qinyu, Zhang Nai-tong, Zhi Xin-wei
A time-domain version of the uniform geometrical theory of diffraction (TD-UTD) is introduced to describe, in closed form, the UWB transient electromagnetic diffracted by a perfectly conducting wedge. This TD-UTD impulse response is obtained by a Fourier inversion of the corresponding frequency domain UTD solution. The UWB pulsed diffracted excitation of the wedge may be found via its convolution with the closed form time domain dyadic diffraction coefficient. Some numerical examples, which illustrate the utility of these developments and give more intrinsically interpretations for the mechanics as well as characteristics of UWB pulse diffraction, are presented.
{"title":"Time Domain Analysis of UWB Pulsed Field Diffraction","authors":"Wang Yang, Zhang Qinyu, Zhang Nai-tong, Zhi Xin-wei","doi":"10.1109/ICMMT.2007.381343","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381343","url":null,"abstract":"A time-domain version of the uniform geometrical theory of diffraction (TD-UTD) is introduced to describe, in closed form, the UWB transient electromagnetic diffracted by a perfectly conducting wedge. This TD-UTD impulse response is obtained by a Fourier inversion of the corresponding frequency domain UTD solution. The UWB pulsed diffracted excitation of the wedge may be found via its convolution with the closed form time domain dyadic diffraction coefficient. Some numerical examples, which illustrate the utility of these developments and give more intrinsically interpretations for the mechanics as well as characteristics of UWB pulse diffraction, are presented.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122514241","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381399
Wu Pan, Bing Long, J. Ye
A dual-band source-inductive-degeneration cascoded low noise amplifier, whose center frequencies are 940 MHz and 2020 MHz respectively, based on common usage of the component independent of the frequency, was investigated and designed in this paper. The interstage mutual coupled inductors provide the required input impedance matching and interstage impedance transformation. The circuit's reverse isolation for the cascoded LNA is improved. The parallel capacitance between the MOSFET's gate and source optimize noise factor of the LNA. The matching network design, the noise optimizing were analyzed hereof. The development of LNA and the methods of NF optimization were studied. The designed LNA achieves power gains of 26 dB and 25 dB, and minimum noise figure of 1.1 dB and 2.0 dB, and power of 10.5 mw with 1.5 voltages respectively.
{"title":"Study and Design of the Dual-Band Low Noise Amplifier","authors":"Wu Pan, Bing Long, J. Ye","doi":"10.1109/ICMMT.2007.381399","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381399","url":null,"abstract":"A dual-band source-inductive-degeneration cascoded low noise amplifier, whose center frequencies are 940 MHz and 2020 MHz respectively, based on common usage of the component independent of the frequency, was investigated and designed in this paper. The interstage mutual coupled inductors provide the required input impedance matching and interstage impedance transformation. The circuit's reverse isolation for the cascoded LNA is improved. The parallel capacitance between the MOSFET's gate and source optimize noise factor of the LNA. The matching network design, the noise optimizing were analyzed hereof. The development of LNA and the methods of NF optimization were studied. The designed LNA achieves power gains of 26 dB and 25 dB, and minimum noise figure of 1.1 dB and 2.0 dB, and power of 10.5 mw with 1.5 voltages respectively.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124394437","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381322
Yanjun Gong, Zhensen Wu, Wenying Yu
A new geometric-optics model has been developed for the calculation of polarization properties for ellipsoidal particles. The model uses the ray-tracing technique to solve the near field on the ellipsoidal particle surface, which is then transformed to the far field on the basis of the electromagnetic equivalence theorem. Sphere is special ellipsoid, so this method can calculate polarization properties of sphere particles. From comparisons with the results computed by the Mie method for sphere particle, we show that the novel geometric-optics method can be applied to the computation of the phase function of ellipsoidal particles whose size parameters along the minimum dimension are larger than 30.
{"title":"Optical Properties of Ellipsoidal Particles in the Geometrical Optics Approximation","authors":"Yanjun Gong, Zhensen Wu, Wenying Yu","doi":"10.1109/ICMMT.2007.381322","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381322","url":null,"abstract":"A new geometric-optics model has been developed for the calculation of polarization properties for ellipsoidal particles. The model uses the ray-tracing technique to solve the near field on the ellipsoidal particle surface, which is then transformed to the far field on the basis of the electromagnetic equivalence theorem. Sphere is special ellipsoid, so this method can calculate polarization properties of sphere particles. From comparisons with the results computed by the Mie method for sphere particle, we show that the novel geometric-optics method can be applied to the computation of the phase function of ellipsoidal particles whose size parameters along the minimum dimension are larger than 30.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127648430","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381425
Huan Wang, Q. Chu
A novel method to generate a transmission zero is proposed through both electric and magnetic mixed coupling between two coupled resonators without using any additional cross coupling. A novel equivalent circuit model of two coupled resonators with both electric and magnetic mixed coupling is given to analyze the principle of this approach. An example of two coupled TE01 mode dielectric resonators coupled by both an iris and a probe is illustrated to prove the availability of the proposed method.
{"title":"Generation of Transmission Zero through Electric and Magnetic Mixed Coupling","authors":"Huan Wang, Q. Chu","doi":"10.1109/ICMMT.2007.381425","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381425","url":null,"abstract":"A novel method to generate a transmission zero is proposed through both electric and magnetic mixed coupling between two coupled resonators without using any additional cross coupling. A novel equivalent circuit model of two coupled resonators with both electric and magnetic mixed coupling is given to analyze the principle of this approach. An example of two coupled TE01 mode dielectric resonators coupled by both an iris and a probe is illustrated to prove the availability of the proposed method.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"178 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116339185","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381351
X. Luo, B. Zeng
Electrons in open quantum dots could be regarded as resonance of electron wave in a potential. The relationship between the wave function of quantum dots and the electromagnetic wave in open resonance cavity was studied by theoretically. On this base, the characters including transmission function and distribution of field in corresponding open cavity were simulated by using electromagnetic code: HFSS (High Frequency Structure Simulator). The simulation results agree with the experimental results. This method could be used study the properties of quantum dots and electron wave guide.
开放量子点中的电子可以看作是电子波在电势中的共振。从理论上研究了开放谐振腔中量子点波函数与电磁波的关系。在此基础上，利用HFSS (High Frequency Structure Simulator，高频结构模拟器)对相应空腔的传输函数和场分布等特性进行了仿真。仿真结果与实验结果吻合。该方法可用于量子点和电子波导性质的研究。
{"title":"Microwave analog and simulation in open quantum dots","authors":"X. Luo, B. Zeng","doi":"10.1109/ICMMT.2007.381351","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381351","url":null,"abstract":"Electrons in open quantum dots could be regarded as resonance of electron wave in a potential. The relationship between the wave function of quantum dots and the electromagnetic wave in open resonance cavity was studied by theoretically. On this base, the characters including transmission function and distribution of field in corresponding open cavity were simulated by using electromagnetic code: HFSS (High Frequency Structure Simulator). The simulation results agree with the experimental results. This method could be used study the properties of quantum dots and electron wave guide.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114184106","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381477
Taijun Liu, Yan Ye, Xingbin Zeng, S. Boumaiza, Jiaming He, F. Ghannouchi
In this paper, a spectral method based on the memoryless predistortion technique is presented to identify accurately the memory effects of wideband RF power amplifiers stimulated by practical modulated signals. According to this new definition of the memory effects, a novel metric to measure quantitatively the memory effects in wideband power amplifiers is proposed. With the proposed memory effect metrics, the intensity of the memory effects for different power amplifiers, under a variety of the excitation modulated signals, can be quantitatively evaluated.
{"title":"Spectral Methods for Accurate Identification and Quantification of Memory Effects of Wideband RF Power Amplifiers","authors":"Taijun Liu, Yan Ye, Xingbin Zeng, S. Boumaiza, Jiaming He, F. Ghannouchi","doi":"10.1109/ICMMT.2007.381477","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381477","url":null,"abstract":"In this paper, a spectral method based on the memoryless predistortion technique is presented to identify accurately the memory effects of wideband RF power amplifiers stimulated by practical modulated signals. According to this new definition of the memory effects, a novel metric to measure quantitatively the memory effects in wideband power amplifiers is proposed. With the proposed memory effect metrics, the intensity of the memory effects for different power amplifiers, under a variety of the excitation modulated signals, can be quantitatively evaluated.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125338923","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381401
Li Lintao, Wan Jinxiang, Feng-Chang Lai
A new scalable Metal-Insulator-Metal (MIM) capacitor model is presented for RF (Radio Frequency) applications. Four MIM capacitors were fabricated in 0.13 U m CMOS technology. Using physical analysis based on the new model, parameter optimization and curve fitting, the scaling rules are given for all elements on the circuit model. The model fits very well with the measured data in the frequency range 500 MHz-10.01 GHz. The results show that the proposed model provides accurate results, while retaining the physical properties of every element in the model.
提出了一种新的可伸缩金属-绝缘体-金属(MIM)电容器模型，用于射频应用。采用0.13 μ m CMOS工艺制备了4个MIM电容器。通过对新模型的物理分析、参数优化和曲线拟合，给出了电路模型上各元件的比例规则。该模型与500 MHz-10.01 GHz频率范围内的实测数据拟合良好。结果表明，该模型在保留模型中每个元素的物理性质的同时，提供了准确的计算结果。
{"title":"A New Equivalent Circuit Model of MIM Capacitor for RFIC","authors":"Li Lintao, Wan Jinxiang, Feng-Chang Lai","doi":"10.1109/ICMMT.2007.381401","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381401","url":null,"abstract":"A new scalable Metal-Insulator-Metal (MIM) capacitor model is presented for RF (Radio Frequency) applications. Four MIM capacitors were fabricated in 0.13 U m CMOS technology. Using physical analysis based on the new model, parameter optimization and curve fitting, the scaling rules are given for all elements on the circuit model. The model fits very well with the measured data in the frequency range 500 MHz-10.01 GHz. The results show that the proposed model provides accurate results, while retaining the physical properties of every element in the model.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126338803","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381294
H. Elkamchouchi, M. Nasr
3D-fractal rectangular Koch dipole and 3D-fractal Hilbert dipole antennas made of wires are introduced. Theses antennas exhibit lower resonant frequencies and small volume occupations. The performance characteristics of the proposed antennas are examined and compared with successive iterations for the same antenna height for the 3D-fractal rectangular Koch dipole antenna and for the same wire length for the 3D-fractal Hilbert dipole antenna. The radiation properties are considered including input impedance and VSWR as functions of frequency. Also resonant frequencies and their corresponding radiation resistance, quality factor Q and radiation patterns are presented.
{"title":"3D-Fractal Rectangular Koch Dipole and Hilbert Dipole Antennas","authors":"H. Elkamchouchi, M. Nasr","doi":"10.1109/ICMMT.2007.381294","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381294","url":null,"abstract":"3D-fractal rectangular Koch dipole and 3D-fractal Hilbert dipole antennas made of wires are introduced. Theses antennas exhibit lower resonant frequencies and small volume occupations. The performance characteristics of the proposed antennas are examined and compared with successive iterations for the same antenna height for the 3D-fractal rectangular Koch dipole antenna and for the same wire length for the 3D-fractal Hilbert dipole antenna. The radiation properties are considered including input impedance and VSWR as functions of frequency. Also resonant frequencies and their corresponding radiation resistance, quality factor Q and radiation patterns are presented.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124801727","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}
Pub Date : 2007-04-18DOI: 10.1109/ICMMT.2007.381423
Yang Mingshan, D. Xiaoyan, Niu Zhongxia
The gain frequency characteristic and input-output characteristic of microwave vacuum tube were analyzed. That the attenuation frequency characteristic of matched equalizer is not a single curve but a permitted range was expatiated. Normally, averaging the upper limit and lower limit acts as room equalized curve, this should be controlled not to overrun the limit in all different conditions. The rule of equalized curve shift with temperature was concluded from large amount of measured data analysis; the shifts are not symmetry in high temperature and low temperature but complex with many influence factors. Room temperature aberrant equalized curve at some frequency band, where some substructural resonant curves shifted beyond the limit, was designed to considered all-inclusive property at room temperature, high temperature and low temperature. The pre-aberration technology, which needs large amount of design and tuning again and again to get experience, is an effective method in the equalizer design and other similar microwave device design.
{"title":"Room temperature pre-aberrational technology applied in the microwave equalizer design","authors":"Yang Mingshan, D. Xiaoyan, Niu Zhongxia","doi":"10.1109/ICMMT.2007.381423","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381423","url":null,"abstract":"The gain frequency characteristic and input-output characteristic of microwave vacuum tube were analyzed. That the attenuation frequency characteristic of matched equalizer is not a single curve but a permitted range was expatiated. Normally, averaging the upper limit and lower limit acts as room equalized curve, this should be controlled not to overrun the limit in all different conditions. The rule of equalized curve shift with temperature was concluded from large amount of measured data analysis; the shifts are not symmetry in high temperature and low temperature but complex with many influence factors. Room temperature aberrant equalized curve at some frequency band, where some substructural resonant curves shifted beyond the limit, was designed to considered all-inclusive property at room temperature, high temperature and low temperature. The pre-aberration technology, which needs large amount of design and tuning again and again to get experience, is an effective method in the equalizer design and other similar microwave device design.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123279078","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}
Nowadays, digital beam forming (DBF) technology is more and more widely used in communication and radar systems. But in most situations, lots of errors such as the array position uncertainty or RF channel dissimilarity, A/D sampling deviation, etc., usually make the actual result deviated from the theory analysis. In this paper, firstly, the effects caused by these uncertainties are illustrated, then a new mathematical model is set up to estimate these errors, and finally the model is proved very useful by the simulation results.
{"title":"One Mathematical Model for Analyzing DBF Error in Smart Antenna System","authors":"Qingchun Zhang, Weizhao Li, Meng Cao, Zhengyi Li, Zhenghe Feng","doi":"10.1109/ICMMT.2007.381298","DOIUrl":"https://doi.org/10.1109/ICMMT.2007.381298","url":null,"abstract":"Nowadays, digital beam forming (DBF) technology is more and more widely used in communication and radar systems. But in most situations, lots of errors such as the array position uncertainty or RF channel dissimilarity, A/D sampling deviation, etc., usually make the actual result deviated from the theory analysis. In this paper, firstly, the effects caused by these uncertainties are illustrated, then a new mathematical model is set up to estimate these errors, and finally the model is proved very useful by the simulation results.","PeriodicalId":409971,"journal":{"name":"2007 International Conference on Microwave and Millimeter Wave Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131718213","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}
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