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Broad-Band Matching of Antennas using Dual-Mode Radiators 基于双模辐射器的天线宽带匹配
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340982
I. Hunter
{"title":"Broad-Band Matching of Antennas using Dual-Mode Radiators","authors":"I. Hunter","doi":"10.1109/EUMA.2003.340982","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340982","url":null,"abstract":"This paper describes a new method for increasing the bandwidth of microwave antennas. This is achieved by recognizing that microstrip patch antennas may support two orthogonal resonant modes, or polarizations. These resonant modes may be modelled by a simple filter network, consisting of two coupled resonators, which represents the input impedance of such a dual-mode antenna. A novel and simple method of maximizing the bandwidth of the input reflection coefficient of a dual-mode antenna, by suitable choice of resonator couplings is presented. This method provides a theoretical bandwidth improvement of more than 300% when compared with a single mode antenna. The result is experimentally confirmed. From a practical point of view the method could have useful application in the design of antennas for mobile phones.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129605151","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: 3
A novel phase-only method for shaped beam synthesis and adaptive nulling 一种新的纯相位形束合成和自适应消零方法
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.341059
R. V. Gatti, L. Marcaccioli, R. Sorrentino
{"title":"A novel phase-only method for shaped beam synthesis and adaptive nulling","authors":"R. V. Gatti, L. Marcaccioli, R. Sorrentino","doi":"10.1109/EUMA.2003.341059","DOIUrl":"https://doi.org/10.1109/EUMA.2003.341059","url":null,"abstract":"A new method for phase-only synthesis of linear array antennas is proposed. The phase distribution of the array excitation can be described by a weighted sum of proper basis functions. By optimizing the weights of this sum, rather than the phase of each element, the problem becomes almost independent of the size of the array. The present work shows that with this method both beam shaping and interference nulling can be achieved. The very fast convergence of the optimization makes it suitable even for real-time applications.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128223521","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
A New Method to Obtain Total Power Receiver Equivalent Noise Temperature 一种获取总功率接收机等效噪声温度的新方法
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340963
B. Aja, J. P. Pascual, L. de la Fuente, J. Gallegos, E. Artal
{"title":"A New Method to Obtain Total Power Receiver Equivalent Noise Temperature","authors":"B. Aja, J. P. Pascual, L. de la Fuente, J. Gallegos, E. Artal","doi":"10.1109/EUMA.2003.340963","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340963","url":null,"abstract":"A method to obtain more accurate noise temperature of a radiometer at room temperature using commercial noise sources is presented. A low noise amplifier used in a radiometer system has an equivalent noise temperature which adds the contributions of its equivalent noise temperature at each frequency over its operating frequency range. The Y-factor has been improved and generalised to take into account the dependence with frequency of the noise source and the transfer function of a receiver. This dependence is especially relevant for broadband radiometer systems. A commercial simulator is used to validate the method and a Ka-band total power radiometer is characterized following the proposed method.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128801052","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
Analysis and Design of a High-Efficiency Multistage Doherty Power Amplifier for WCDMA WCDMA高效多级Doherty功率放大器的分析与设计
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340867
N. Srirattana, A. Raghavan, D. Heo, P. Allen, J. Laskar
{"title":"Analysis and Design of a High-Efficiency Multistage Doherty Power Amplifier for WCDMA","authors":"N. Srirattana, A. Raghavan, D. Heo, P. Allen, J. Laskar","doi":"10.1109/EUMA.2003.340867","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340867","url":null,"abstract":"A comprehensive analysis of multistage Doherty amplifier, which can be used to achieve higher efficiency at greater back-off compared to the classical Doherty amplifier, is presented. A novel set of design equations for a generalized N-stage Doherty amplifier is introduced. For the first time, this technique is applied to the design of a WCDMA power amplifier (PA). The designed PA meets WCDMA requirements, and exhibits a power-added efficiency (PAE) of 34.5% at 6 dB back-off and 16.9% at 12 dB back-off. These PAEs are 2 times and 4 times better, respectively, than that of a single stage linear PA at the same back-off levels. The PA is capable of delivering up to 28.6 dBm of output power, and has a maximum adjacent channel power leakage ratio of ¿38 dBc and ¿51 dBc at 5 and 10 MHz offset, respectively. To the best of the authors' knowledge, these represent the best reported results of a Doherty amplifier for WCDMA application in the 1.95 GHz band, to date.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128987077","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: 18
Cost-Minimized 24 GHz Pulse Oscillator for Short-Range Automotive Radar Applications 用于近程汽车雷达的24ghz脉冲振荡器
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.341138
A. Kryshtopin, G. Sevskiy, K. Markov, P. Heide, M. Nalezinski, R. Roskosch, M. Vossiek
{"title":"Cost-Minimized 24 GHz Pulse Oscillator for Short-Range Automotive Radar Applications","authors":"A. Kryshtopin, G. Sevskiy, K. Markov, P. Heide, M. Nalezinski, R. Roskosch, M. Vossiek","doi":"10.1109/EUMA.2003.341138","DOIUrl":"https://doi.org/10.1109/EUMA.2003.341138","url":null,"abstract":"This paper reports on the design of ultrawideband 24 GHz pulse oscillators developed for automotive radar applications. Due to system considerations (range resolution, dynamic range), such oscillator modules need to generate ultra-short coherent pulses. Measurement results of prototype oscillators demonstrate +5 dBm peak output power, less than 1 ns pulse width and excellent coherency. The oscillators were applied in a radar sensor and good performance was achieved.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130488821","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: 14
Design of Broadband Directly Coupled Non-Centred Resonant Irises Filters 宽带直接耦合非中心谐振虹膜滤波器的设计
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340929
R. Barrio-Garrido, S. Llorente-Romano, A. García-Lampérez, M. Salazar-Palma
{"title":"Design of Broadband Directly Coupled Non-Centred Resonant Irises Filters","authors":"R. Barrio-Garrido, S. Llorente-Romano, A. García-Lampérez, M. Salazar-Palma","doi":"10.1109/EUMA.2003.340929","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340929","url":null,"abstract":"A novel type of broadband highly selective filters in waveguide technology is presented. It is based on directly coupled resonant irises filters. The position of the apertures is studied in order to obtain a filter structure easier to construct. The Mode Matching Method is used for the design and simulation of the structure. An efficient optimisation method is employed to overcome the design problems that presents the non-centred irises approach, namely, the higher order modes excited in these discontinuities that strongly modify the couplings between adjacent irises. This optimisation method is based on the estimation of these couplings, so it can be efficiently used to tune the dimensions of the initial design.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126841700","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: 7
Ellipsometry for Measurement of Complex Dielectric Permittivity in Millimeter-Wave Region 椭圆偏振法测量毫米波区复介电常数
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340996
K. Tsuzukiyama, T. Sakai, T. Yamazaki, O. Hashimoto
{"title":"Ellipsometry for Measurement of Complex Dielectric Permittivity in Millimeter-Wave Region","authors":"K. Tsuzukiyama, T. Sakai, T. Yamazaki, O. Hashimoto","doi":"10.1109/EUMA.2003.340996","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340996","url":null,"abstract":"The ellipsometry method is extended to a measurement for complex permittivities of materials in millimeter-wave region. We propose an effective technique based on the Fourier analysis method to eliminate an uncertainty due to the free-space method. Complex permittivities can be measured with a high degree of accuracy by the improved ellipsometry method, as named Fourier Analysis Correction Ellipsometry (FACE) Method.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116287089","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
Flexible Hybrid MM/MoM Technique for the CAD and Optimization of Arbitrarily Shaped 3D Waveguide Components 任意形状三维波导元件CAD与优化的柔性混合MM/MoM技术
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340960
F. Arndt, V. Catina, J. Brandt
{"title":"Flexible Hybrid MM/MoM Technique for the CAD and Optimization of Arbitrarily Shaped 3D Waveguide Components","authors":"F. Arndt, V. Catina, J. Brandt","doi":"10.1109/EUMA.2003.340960","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340960","url":null,"abstract":"A hybrid mode-matching (MM) / method-of-moment (MoM) technique is applied for modeling arbitrarily shaped 3D waveguide structures. Using the free-space Green's function, the attractive feature of this technique is the high flexibility of the MoM combined with the efficiency of the MM method. Its versatility is demonstrated at examples of practical interest, a compensated magic-tee and a combline filter with round posts. The efficiency and accuracy of the method is verified by reference calculations and measurements.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116370602","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: 7
A Novel Distributed Multicell Multistage Amplifier Structure 一种新型分布式多细胞多级放大器结构
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340969
R. Lohrmann, H. Gill, S. Koch
{"title":"A Novel Distributed Multicell Multistage Amplifier Structure","authors":"R. Lohrmann, H. Gill, S. Koch","doi":"10.1109/EUMA.2003.340969","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340969","url":null,"abstract":"A novel distributed multicell multistage amplifier structure is presented in this paper. This approach enables the design of multicell multistage power amplifiers based on distributed transistor arrays (multicells). Measured data of 40-device monolithic power amplifiers in the frequency bands 25-30GHz and 28-34GHz are also presented. The amplifiers have a small-signal gain of ~15dB, a 1dB gain compression at output power (P1dB) of ~32dBm and outpu intercept point (OICP3) of ~38dBm. Measured results are compared with computed data.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116517125","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
Size-Reduction and Harmonic-Rejection of Microwave Amplifiers using Spiral-Defected Ground Structure 采用螺旋缺陷接地结构的微波放大器的尺寸减小和谐波抑制
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340888
Jongsik Lim, Y. Jeong, D. Ahn, Young-Taek Lee, H. Cho, S. Nam
{"title":"Size-Reduction and Harmonic-Rejection of Microwave Amplifiers using Spiral-Defected Ground Structure","authors":"Jongsik Lim, Y. Jeong, D. Ahn, Young-Taek Lee, H. Cho, S. Nam","doi":"10.1109/EUMA.2003.340888","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340888","url":null,"abstract":"A new method to reduce the size of amplifiers and reject harmonics using spiral-defected ground structure (Spiral-DGS) is presented. A microstrip transmission line having Spiral-DGS provides increased slow¿wave factor (SWF) and excellent rejection characteristics for a specified harmonic frequency band as if it is a band rejection filter. Due to the increased SWF, the physical lengths of matching networks are shortened while the original matching and performances are preserved. The reduced lengths by Spiral-DGS are 39% and 44% of the original lengths in input and output matching networks, respectively. It is shown that the measured S-parameters of the reduced amplifier agree well with those of the original amplifier. The measured second harmonic of the reduced amplifier is much less than that of the original amplifier by at least 10dB.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114747248","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
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