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A New «Region» Technique for Designing Microwave Transistor Low-Noise Amplifiers with Lossless Equalizers 设计具有无损均衡器的微波晶体管低噪声放大器的新“区域”技术
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751727
L. Babak, M. Cherkashin, A. Polyakov
{"title":"A New «Region» Technique for Designing Microwave Transistor Low-Noise Amplifiers with Lossless Equalizers","authors":"L. Babak, M. Cherkashin, A. Polyakov","doi":"10.1109/EUMC.2008.4751727","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751727","url":null,"abstract":"A new region technique is presented for designing broadband linear and low-noise amplifiers (LNAs) with lossless equalizers. It allows the exact synthesis of equalizers directly from a simultaneous set of performance specifications, including the gain, gain flatness, noise figure, input and output return losses, and stability. The technique is implemented in the CAD tool providing a means for fast and convenient visual amplifier design. As an example, the design of 1.5-2.5 GHz matched MMIC LNA without external matching networks is demonstrated.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117336973","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
Ka-Band CMOS Hybrids Miniaturization Incorporating Multilayer Synthetic Quasi-TEM Transmission Lines 包含多层合成准tem传输线的ka波段CMOS杂化微型化
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751455
M. Chiang, Hsien-Shun Wu, Ching-Kuang C. Tzuang
{"title":"Ka-Band CMOS Hybrids Miniaturization Incorporating Multilayer Synthetic Quasi-TEM Transmission Lines","authors":"M. Chiang, Hsien-Shun Wu, Ching-Kuang C. Tzuang","doi":"10.1109/EUMC.2008.4751455","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751455","url":null,"abstract":"Multilayer synthetic quasi-TEM transmission lines (TLs) are applied to the CMOS hybrids miniaturization. Two meandered synthetic quasi-TEM TLs are integrated in the form of CMOS multilayer structure and shielded by the mesh ground plane. Theoretical analyses are performed to extract the guiding properties of the multilayer synthetic quasi-TEM TLs. The extracted results are applied to the CMOS hybrid designs. The prototypes of Ka-band power divider and 180-degree hybrid (rat-race hybrid) are implemented by using the standard 0.18-mum 1P6M CMOS technology, achieving the circuit sizes of 180.0 mum times 180.0 mum and 210.0 mum times 480.0 mum, respectively. The experiments show intrinsic loss of power divider is less than 5.26 dB over a bandwidth of 10-GHz when the input return loss is kept higher than 10.0 dB. In the rat-race design, the measured insertion loss is 4.98 dB and the isolation is higher than 17.0 dB.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132845549","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
Design of Quadrature Directional Couplers with Continuously Variable Coupling Ratios 连续变耦合比正交定向耦合器的设计
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751422
T. Lehmann, H. Mextorf, R. Knoechel
{"title":"Design of Quadrature Directional Couplers with Continuously Variable Coupling Ratios","authors":"T. Lehmann, H. Mextorf, R. Knoechel","doi":"10.1109/EUMC.2008.4751422","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751422","url":null,"abstract":"This paper presents a systematic approach for the design of directional couplers with tunable coupling strength, which maintain the properties of perfect impedance match and isolation over the whole tuning range. The devised method is based on eigenreflections and requires the synthesis of one-ports. This can be carried out with the help of graphical presentations in the Smith chart, thus fostering intuition in finding new circuit structures. The method is theoretically demonstrated by the development of a novel tunable LC-coupler or Maxwell bridge and a tunable proximity coupler. An experimental realization of the Maxwell bridge yields a tunable coupling ratio between 2 dB and 20 dB while maintaining excellent return loss and isolation.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133457525","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: 13
Preconditioned Finite-Difference Frequency-Domain for Modelling Periodic Dielectric Structures - Comparisons with FDTD 周期电介质结构建模的预条件有限差分频域-与FDTD的比较
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751581
A. Chabory, B. P. D. Hon, W. Schilders, A. Tijhuis
{"title":"Preconditioned Finite-Difference Frequency-Domain for Modelling Periodic Dielectric Structures - Comparisons with FDTD","authors":"A. Chabory, B. P. D. Hon, W. Schilders, A. Tijhuis","doi":"10.1109/EUMC.2008.4751581","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751581","url":null,"abstract":"Finite-difference techniques are very popular and versatile numerical tools in computational electromagnetics. In this paper, we propose a preconditioned finite-difference frequency-domain method (FDFD) to model periodic structures in 2D and 3D. The preconditioner follows from a modal decoupling approximation. Its use involves discrete Fourier transforms (via FFTs). We have set FDFD against an FDTD package for a typical test case, with identical spatial grids. We have observed that computation times for a full frequency sweep are comparable, while the accuracy is slightly better with FDFD.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132157044","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
The ONERA Compact Ka-SAR ONERA紧凑型Ka-SAR
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751785
J. Nouvel, S. Angélliaume, O. D. du Plessis
{"title":"The ONERA Compact Ka-SAR","authors":"J. Nouvel, S. Angélliaume, O. D. du Plessis","doi":"10.1109/EUMC.2008.4751785","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751785","url":null,"abstract":"A concept of low-size and low-weight imaging Ka-Band radar is presented in this paper. This radar is embedded into an under-wing pod. This radar particularities are a low-size, a low-weight and a low-cost basis, making this radar suitable for future integration on board small vehicles, such as UAV. The radar definition and specifications will be detailed, together with the results obtained from in flight campaigns executed on 2006 and 2007. This SAR radar has been developed and built to fly on board an UAV-like vehicle. Indeed, this radar is designed and used by ONERA as a UAV radar test bench. Different upgrades are under study, such as a squint-angle acquisition mode or an increase of the polarimetry capacities. In addition, a complementary X band sensor is also manufactured. Current airplane used for testing applications is a STEMME S10-VT motorglider as the geometry of this airplane may be representative of a MALE UAV: wingspan is 23m large and weigh is about 900 kilograms.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127464997","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
High-Efficiency Class-E-Cells-Based GaN HEMT Doherty Amplifier for WCDMA Applications WCDMA应用的高效e类电池GaN HEMT Doherty放大器
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751480
Yong‐Sub Lee, Mun‐Woo Lee, Y. Jeong
{"title":"High-Efficiency Class-E-Cells-Based GaN HEMT Doherty Amplifier for WCDMA Applications","authors":"Yong‐Sub Lee, Mun‐Woo Lee, Y. Jeong","doi":"10.1109/EUMC.2008.4751480","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751480","url":null,"abstract":"This paper represents a high-efficiency GaN high electron mobility transistor (HEMT) class-E Doherty amplifier (CEDA) for wide-band code division multiple access (WCDMA) applications. The class-E power amplifiers (PAs) with significant harmonic suppression are used as the carrier and peaking cells. To further improve the efficiency, the asymmetrical drain biases are applied to the CEDA. For validations, the class-E PA is designed and implemented with 25-W GaN HEMT at 2.14 GHz. From the measured results for a single tone, the peak power-added efficiency (PAE) and drain efficiency of 73.5% and 76.5% are achieved with a gain of 14.1 dB at an output power of 43.1 dBm by suppressing harmonic power levels below -60 dBc. For the proposed CEDA, the PAE and drain efficiency of 56.1% and 61.2% is achieved at 40 dBm (6-dB back-off power from Psat) for a single tone. For a 1-carrier WCDMA signal, the PAE of 57.2% is obtained with an adjacent channel leakage ratio (ACLR) of -27.2 dBc at 40 dBm, which is 9.6% improvement over the conventional Doherty amplifier with an ACLR of -29.5 dBc.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123893640","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: 13
New Stepped-Impedance Parallel-Coupled Line (PCL) Filters for Ultra-Wide Band (UWB) Applications 用于超宽带(UWB)应用的新型阶跃阻抗平行耦合线(PCL)滤波器
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751497
W. Fathelbab, H. Jaradat
{"title":"New Stepped-Impedance Parallel-Coupled Line (PCL) Filters for Ultra-Wide Band (UWB) Applications","authors":"W. Fathelbab, H. Jaradat","doi":"10.1109/EUMC.2008.4751497","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751497","url":null,"abstract":"A new class of stepped-impedance parallel-coupled line filters is presented. The filters are compact, suitable for ultra-wide band frequency applications and exhibit broad upper stopband frequency characteristics. Several UWB filters were implemented at 1 and 3 GHz each demonstrating a measured fractional bandwidth of over 111% and each exhibiting a first spurious passband located at five times the fundamental passband center frequency. Furthermore a 6.85 GHz filter was fabricated and showed excellent electrical performance.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124368708","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
Analyzing a 2-D Cavity with Reinforced Concrete Walls Using Generalized Surface Integral Equations 用广义曲面积分方程分析带钢筋混凝土壁的二维腔体
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751616
G. Xiao, Junfa Mao, B. Yuan
{"title":"Analyzing a 2-D Cavity with Reinforced Concrete Walls Using Generalized Surface Integral Equations","authors":"G. Xiao, Junfa Mao, B. Yuan","doi":"10.1109/EUMC.2008.4751616","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751616","url":null,"abstract":"A 2-D cavity with reinforced concrete walls is analyzed using a generalized surface integral equation method developed from Huygens' principle. In the method, a multi-scale system is divided into small blocks. The detail structure of each block may be analyzed independently and its electromagnetic characteristics can be expressed by using a generalized transition matrix defined on the reference surface of that block. A generalized surface integral equation formulation may be established on all the reference surfaces, which can be solved efficiently by using characteristic basis functions.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114459533","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 60-W/180-W Digitally Controlled Switched-Cap LC Oscillator for 900MHz/2.4GHz operation 60w /180 w数字控制开关盖LC振荡器，900MHz/2.4GHz工作
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751553
R. Vinella, J. van der Tang
{"title":"A 60-W/180-W Digitally Controlled Switched-Cap LC Oscillator for 900MHz/2.4GHz operation","authors":"R. Vinella, J. van der Tang","doi":"10.1109/EUMC.2008.4751553","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751553","url":null,"abstract":"An LC-tank oscillator for ultra-low-power narrow-band applications is designed using a switched capacitors tuning implementation in a 9-layer-metal 90 nm RF CMOS technology. The oscillator is targeted for 900 MHz and 2.4 GHz ISM bands operation with external inductors. The design resulted in a flexible and digitally controllable oscillator core that can be used with both external and planar integrated inductors. The presented VCO consumes 60 muW in the 900 MHz band and 180 muW in the 2.4 GHz band from a 1.2-V power supply. The best simulated phase noise at 1.5 MHz is -121 dBc/Hz and - 131.8 dBc/Hz in the 2.4 GHz band and in the 900 MHz band, respectively. A highlight of this design is the fact that an excellent Figure-of-Merit (ranging from -193 dB to -199 dB) is combined with a very large tuning range (>16% in both operational bands).","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114960512","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
Dielectric Lens Utilization for Fabry-Perot Resonator Optimal Coupling 介质透镜用于法布里-珀罗谐振腔最佳耦合
2008 38th European Microwave Conference Pub Date : 2008-10-01 DOI: 10.1109/EUMC.2008.4751613
P. Piksa, P. Černý, S. Zvánovec, M. Mazanek, Š. Urban
{"title":"Dielectric Lens Utilization for Fabry-Perot Resonator Optimal Coupling","authors":"P. Piksa, P. Černý, S. Zvánovec, M. Mazanek, Š. Urban","doi":"10.1109/EUMC.2008.4751613","DOIUrl":"https://doi.org/10.1109/EUMC.2008.4751613","url":null,"abstract":"This paper introduces the Fabry-Perot resonator designed for the frequency band 18-80 GHz. The Fabry-Perot improvement using a hyperbolical lens, which transforms the spherical wave, radiated by the standard horn antennas to the plane wave irradiating the coupling foil of the resonator is discussed. This approach helps to efficiently couple the energy into and out of the resonator. The quality factors (loaded as well as unloaded) were evaluated from the measured frequency responses of the resonances. These quality factors show the effectiveness of used lenses and functionality of the resonator within the frequency band 75-110 GHz, which is higher than the designed band.","PeriodicalId":308339,"journal":{"name":"2008 38th European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117150554","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
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