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2003 33rd European Microwave Conference, 2003最新文献

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A hybridization technique for MLFMM for a large class of cavity backed aperture scattering problems 一种用于大规模腔背孔径散射问题的MLFMM杂交技术
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340958
A. Enneking, J. Ritter, R. Bunger
{"title":"A hybridization technique for MLFMM for a large class of cavity backed aperture scattering problems","authors":"A. Enneking, J. Ritter, R. Bunger","doi":"10.1109/EUMA.2003.340958","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340958","url":null,"abstract":"An efficient technique for the analysis of electromagnetic problems involving large metallic bodies with arbitrary complex interior and a number of apertures is presented. Typical applications for this technique are the computation of EMC related transfer-functions of the electromagnetic field, describing the coupling of energy into complex systems as well as the computation of the RCS of complex cavities in large metallic scatterers. The proposed method is based on the combination of generalized admittance matrices (GAMs) for the apertures with MLFMM for the outer problem. The GAMs are first computed by the most appropriate technique for the complex interior problem (e.g. FDTD). In the second step of this technique, the admittance matrices are incorporated into the MLFMM-accelerated iterative MoM solution process. This technique is especially suited for coupling studies of complex systems requiring many different field incident angles, since the GAMs are to be computed only once.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"9 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":"126610200","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
Feedforward amplifier using power sensors for the loop balancing 前馈放大器采用功率传感器进行回路平衡
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340800
M. Gadringer, H. Arthaber, G. Magerl
{"title":"Feedforward amplifier using power sensors for the loop balancing","authors":"M. Gadringer, H. Arthaber, G. Magerl","doi":"10.1109/EUMA.2003.340800","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340800","url":null,"abstract":"Adaptively controlled feedforward amplifiers are discussed in a large number of publications over the past years. So far, for the control of the distortion cancellation loop it seemed inevitable to implement a baseband processing unit at the output of the amplifier if the use of a pilot carrier should be avoided. This paper analyzes a modified feedforward structure, in which power sensors are used to provide the input signals for the loop controllers. The limits of this approach are discussed and measurement results for a 40 W GSM2+ (EDGE) power amplifier are presented.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"8 12 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":"123757675","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
Biasing Circuits for Voltage Controlled GSM Power Amplifiers 电压控制GSM功率放大器的偏置电路
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340944
A. van Bezooijen, D. Prikhodko, A. V. van Roermund
{"title":"Biasing Circuits for Voltage Controlled GSM Power Amplifiers","authors":"A. van Bezooijen, D. Prikhodko, A. V. van Roermund","doi":"10.1109/EUMA.2003.340944","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340944","url":null,"abstract":"In GSM phones voltage controlled power amplifiers are used to vary the output power. Inaccuracies in output power levels are predominantly caused by drift in PA gain over temperature and input power. In this paper we present biasing circuits that implement an inherently accurate gain control curve. These circuits are based on temperature stabilised V/I-converters and current mirrors. Applying current driven biasing of the first RF-stage reduces the input power dependency of the gain. Measurements show an order of magnitude less drift in PA gain over temperature variations and about a factor five smaller drift over input power variations. The proposed circuits relax the dynamic range and stability requirements on the power control loop and they will help making phone output power calibrations redundant.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"101 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":"123784406","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
Efficient Analysis of Printed Circuits by the MoM/BI-RME Method 用MoM/BI-RME方法高效分析印刷电路
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340952
M. Repossi, P. Arcioni, M. Bozzi, M. Bressan, L. Perregrini
{"title":"Efficient Analysis of Printed Circuits by the MoM/BI-RME Method","authors":"M. Repossi, P. Arcioni, M. Bozzi, M. Bressan, L. Perregrini","doi":"10.1109/EUMA.2003.340952","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340952","url":null,"abstract":"This paper presents an efficient technique for the analysis of printed circuits with arbitrarily shaped metallizations. This novel technique is based on the MoM/BI-RME method: it consists in the formulation of an electric field integral equation, which is solved by the Method of Moments (MoM) with entire-domain basis functions. The efficiency of the method derives from the use of the Boundary Integral-Resonant Mode Expansion (BI-RME) method in the determination of the basis functions in the case of fully arbitrary metal patches. The novelty of this work is the formulation of the BI-RME method for the determination of a novel set of basis functions, which enhances the capabilities of a CAD tool previously developed. The BI-RME formulation for calculating entire-domain basis functions with all possible combination of electric/magnetic boundaries is reported.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"2 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":"122716920","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
Folded Ring Microstrip Filter 折叠环微带滤波器
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340912
B. Virdee, C. Grassopoulos
{"title":"Folded Ring Microstrip Filter","authors":"B. Virdee, C. Grassopoulos","doi":"10.1109/EUMA.2003.340912","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340912","url":null,"abstract":"A conventional microstrip ring resonator when folded up into a more compact structure is shown to exhibit similar characteristics to the annular-ring resonator. The folded ring resonator can resonate at identical resonant modes as the annular-ring resonator, which is designed to operate at the same fundamental mode frequency when fabricated on an identical dielectric substrate. The physical dimensions of this structure are much smaller than that of a conventional microstrip ring operating at the same frequency. Moreover, it can be easily integrated with other microwave devices, and its two flat sides enable effective coupling with adjacent resonators to form filters. Bandpass filters designed using the folded ring structure are significantly more compact than a traditional planar filter such as parallel-coupled bandpass filter designed at the same frequency even when fabricated on high dielectric constant substrates. The folded ring filters implemented provide relatively low insertion loss and good return loss at its passband.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"48 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":"122731180","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
Modeling of Planar Microwave Filters 平面微波滤波器的建模
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.340840
L. Greda, R. Pregla
{"title":"Modeling of Planar Microwave Filters","authors":"L. Greda, R. Pregla","doi":"10.1109/EUMA.2003.340840","DOIUrl":"https://doi.org/10.1109/EUMA.2003.340840","url":null,"abstract":"An approach for modeling of planar microwave filters by the Method of Lines (MoL) is presented. The algorithm combines 2-D discretization of the cross-section with the numerically stable impedance/admittance transformation. To improve accuracy and efficiency of this approach, edge conditions are examined and the best edge position relative to the discretization lines is derived. The convergence behaviour of the method for different edge positions is examined. To substantiate the proposed formulation three planar microwave filter are modeled.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"1 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":"131155572","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 Broadband Transition between Dielectric and Planar Waveguides at Millimeterwave Frequencies 毫米波频率下介电波导与平面波导之间的宽带跃迁
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.341119
J. Richter, Y. Yazici, C. Ziegler, L. Schmidt
{"title":"A Broadband Transition between Dielectric and Planar Waveguides at Millimeterwave Frequencies","authors":"J. Richter, Y. Yazici, C. Ziegler, L. Schmidt","doi":"10.1109/EUMA.2003.341119","DOIUrl":"https://doi.org/10.1109/EUMA.2003.341119","url":null,"abstract":"A variety of transitions between rectangular dielectric waveguides and planar waveguides like microstrip or slotline have been designed to combine the advantages of dielectric wave-guides at millimeterwaves with the excellent hybrid integration capabilities of planar circuits. FDTD field simulations have been applied to analyze and optimize the designed transitions with respect to low insertion and return losses as well as minimized mutual coupling between adjacent transitions. Experimental investigations between 60 and 90 GHz proved the promising results of the simulations with insertion losses between 0.5 and 1.5 dB over the full waveguide band (WR-12). The transitions can well be used for the integration of planar circuits into dielectric waveguides or rod antennas and the designed structures are scalable up to frequencies beyond 100 GHz.","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":"132661948","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: 20
Ultra Wideband Radar Target Discrimination Using the Signatures Algorithm 基于签名算法的超宽带雷达目标识别
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.341129
A. Baev, Yu. F. Kuznetsov, A. Aleksandrov
{"title":"Ultra Wideband Radar Target Discrimination Using the Signatures Algorithm","authors":"A. Baev, Yu. F. Kuznetsov, A. Aleksandrov","doi":"10.1109/EUMA.2003.341129","DOIUrl":"https://doi.org/10.1109/EUMA.2003.341129","url":null,"abstract":"An aspect independent radar target discrimination method based on the natural frequencies of ultra wideband radar targets is introduced. The sets of points in multi-dimension space corresponding to the poles on a complex plane (natural resonances) were offered as signatures of radar targets. This approach allows performing an automated discrimination algorithm of radar targets. The results of experimental research of the signals scattered by the scaled aircraft models by using the signatures algorithm are presented.","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":"131796705","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 Low-Loss Distributed 2-Bit W-Band MEMS Phase Shifter 一种低损耗分布2位w带MEMS移相器
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.341128
Juo-Jung Hung, L. Dussopt, Gabriel M. Rebeiz
{"title":"A Low-Loss Distributed 2-Bit W-Band MEMS Phase Shifter","authors":"Juo-Jung Hung, L. Dussopt, Gabriel M. Rebeiz","doi":"10.1109/EUMA.2003.341128","DOIUrl":"https://doi.org/10.1109/EUMA.2003.341128","url":null,"abstract":"A low-loss 2-bit wide-band distributed microelectromechanical system transmission line (DMTL) phase shifter has been developed on a 500 ¿m glass substrate for W-band operation. The coplanar waveguide (CPW) design is periodically loaded by MEMS switches in series with high-Q MAM (Metal-Air-Metal) capacitors, and shows a reflection coefficient better than -11 dB through the whole W-band frequency range (75-110 GHz) and phase shifts of 0°, 89.3°, 180.1°, 272° at 81 GHz with an average insertion losses of -2.2 dB. This is currently the lowest-loss phase shifter at W-band frequencies.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"61 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":"134215855","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: 26
A Grounded Co-Planar Waveguide MEMS Switch 一种接地共面波导MEMS开关
2003 33rd European Microwave Conference, 2003 Pub Date : 2003-10-01 DOI: 10.1109/EUMA.2003.341041
K. Miyaguchi, Y. Yoshida, T. Nishino, M. Hangai, Y. Suehiro, Sang-Seok Lee, A. Iida, O. Ishida
{"title":"A Grounded Co-Planar Waveguide MEMS Switch","authors":"K. Miyaguchi, Y. Yoshida, T. Nishino, M. Hangai, Y. Suehiro, Sang-Seok Lee, A. Iida, O. Ishida","doi":"10.1109/EUMA.2003.341041","DOIUrl":"https://doi.org/10.1109/EUMA.2003.341041","url":null,"abstract":"A grounded co-planar waveguide (GCPW) MEMS switch is presented. The proposed switch has a movable SiN membrane with a signal line and ground lines above a dielectric-air-metal (DAM) cavity on which a ground metal is patterned, resulting in a structure of GCPW transmission line. The electrostatic force makes an RF short path to the ground metal on the bottom of the DAM cavity with metal-to-metal contact. The ground metal which covers silicon substrate makes the switch to be on a low-resistivity silicon substrate. The measured results of the switch validate the proposed structure of the switches utilizing the DAM cavity.","PeriodicalId":156210,"journal":{"name":"2003 33rd European Microwave Conference, 2003","volume":"57 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":"115203182","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
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