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2010 10th Mediterranean Microwave Symposium最新文献

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X-Band high power ferrite phase shifter x波段大功率铁氧体移相器
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605170
Hakki Ilhan Altan, O. Civi, S. Demir
{"title":"X-Band high power ferrite phase shifter","authors":"Hakki Ilhan Altan, O. Civi, S. Demir","doi":"10.1109/MMW.2010.5605170","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605170","url":null,"abstract":"X-Band high power, low loss and fast switching twin-toroid type ferrite phase shifter is designed and fabricated. Differential phase shift (DPS), insertion loss, high power characteristics and impedance matching are determined and optimized using finite element solver in CST Microwave Studio. The effect of high order modes propagating in the structure is examined and methods to suppress these modes are investigated. <0.8dB insertion loss and >15dB return loss is obtained for all phase states and operating temperature range in 12% bandwidth at X-Band. Switching time smaller than 10us is achieved using a digitally controlled high current driver circuit.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126428035","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
Enhancement of ISM band RFID system performance with varactor-loaded compact RFID tag antenna 用变容负载的紧凑型RFID标签天线增强ISM波段RFID系统性能
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605209
Yusuf Sevinç, A. Kaya
{"title":"Enhancement of ISM band RFID system performance with varactor-loaded compact RFID tag antenna","authors":"Yusuf Sevinç, A. Kaya","doi":"10.1109/MMW.2010.5605209","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605209","url":null,"abstract":"A novel method is presented for electrically tuning the frequency of a compact RFID tag antenna. A tuning circuit, comprising an RF switch and discrete passive components, has been completely integrated into the antenna element, which is thus free of dc wires. The low-profile printed antennas are fabricated together with the layouts of its DC control circuits and other RF/base-band circuit footprints. A surface mounted (SMT) varactor is applied as a frequency-tuning element at proper places of the meandered slots in compact antenna. Prototype designs show the in-band frequency (return loss is <10 dB) is tunable from 2.4 GHz to 2.8 GHz when the bias voltage varies from 4V to 7 V. The impact of the tuning circuit on the antenna's return loss and radiation pattern have been experimentally studied through comparison with the performance of a reference antenna not incorporating the tuning circuit. The proposed frequency tuning concept can be extended to more complex compact structures as well as other types of antennas to give enhanced electrical performance.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121521001","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
New closed-form Green's functions for microstrip structures based on Ge-Esselle's method 基于Ge-Esselle方法的微带结构新型闭式格林函数
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605120
Z. Firouzeh, R. Moini, S. Sadeghi, R. Faraji-Dana
{"title":"New closed-form Green's functions for microstrip structures based on Ge-Esselle's method","authors":"Z. Firouzeh, R. Moini, S. Sadeghi, R. Faraji-Dana","doi":"10.1109/MMW.2010.5605120","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605120","url":null,"abstract":"In this paper, the new closed-form Green's function method is used to calculate the microstrip Green's functions. In the improved method, the surface-wave poles are first extracted using a recursive contour integration method. Then, the remainder is approximated by a series of complex exponentials using the Prony's method or the GPOF along the extended rooftop shaped path in kρ-plane. Subsequently, an analytical identity is employed to obtain the new spatial-domain Green's functions. The numerical results show that the improved method can accurately and efficiently calculate the fields for both near and far regions.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123243152","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
Composition of non-concentric triangular split ring resonators and wire strip for dual-band negative index metamaterials 双波段负折射率超材料非同心圆三角形分环谐振器和线带的组成
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605168
C. Sabah
{"title":"Composition of non-concentric triangular split ring resonators and wire strip for dual-band negative index metamaterials","authors":"C. Sabah","doi":"10.1109/MMW.2010.5605168","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605168","url":null,"abstract":"A novel dual-band negative index metamaterial comprised of non-concentric and different-sized triangular shape resonators with wire strip is presented. The proposed structure provides two distinct resonant frequencies in the microwave region. Effective medium parameters of this metamaterial structure are extracted using retrieval method to demonstrate the presence of the mentioned frequencies. The results show that the proposed novel metamaterial can be useful alternative to the known counterparts especially when a dual band operation is needed at the frequency region of interest.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"132 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131480743","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
Compact LHM-based band-stop filter 紧凑的lmm型带阻滤波器
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605185
M. Palandoken, H. Henke
{"title":"Compact LHM-based band-stop filter","authors":"M. Palandoken, H. Henke","doi":"10.1109/MMW.2010.5605185","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605185","url":null,"abstract":"A compact, low-insertion-loss, high selective band-stop filter is proposed. The filter is composed of four unit cells, two of which are anti-symmetrically connected left-handed metamaterial (LHM) unit cells in combination with their mirror images to obtain the symmetric return losses at both ports. The design of LHM unit cell is based on direct connection of spiral resonator and thin wire to decrease the band-stop frequency further than the conventional split ring resonator designs. The dimensions of the proposed structure are as small as 9.7 mm × 20 mm, while high frequency selectivity could be achieved due to the transmission zeros. The filter has an insertion loss of better than 2 dB even with highly lossy FR4 substrate, and a return loss of larger than 10 dB in the passbands of 2.41–2.65 GHz and 4.26–5.72 GHz. The band rejection of greater than 30 dB is numerically calculated within 3.16–3.54 GHz with high frequency selectivity of 69 dB/GHz.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"273 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134339343","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
Combined fractal geometries for the design of wide band microstrip antennas with circular polarization 圆极化宽带微带天线的组合分形几何设计
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605210
H. Oraizi, S. Hedayati
{"title":"Combined fractal geometries for the design of wide band microstrip antennas with circular polarization","authors":"H. Oraizi, S. Hedayati","doi":"10.1109/MMW.2010.5605210","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605210","url":null,"abstract":"In this paper, we propose the combination of several fractal geometries for microstrip patch antenna for the achievement of their miniaturization and multi banding characteristics. By placing air gaps under the microstrip patches (actually making suspended microstrips) the bandwidths of antennas are drastically improved. By cutting appropriate rectangular and triangular slits as perturbations on the edges of fractal geometries, circular polarizations may be realized in the radiation patterns.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114689823","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: 24
An automatic feature extraction technique for GPR data processing in electromagnetic inverse scattering problems 电磁逆散射问题中探地雷达数据处理的自动特征提取技术
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605194
S. Caorsi, M. Stasolla
{"title":"An automatic feature extraction technique for GPR data processing in electromagnetic inverse scattering problems","authors":"S. Caorsi, M. Stasolla","doi":"10.1109/MMW.2010.5605194","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605194","url":null,"abstract":"This work presents an automatic feature extraction technique for the analysis of GPR data. Despite the rapidly increasing demand for such technology, the interpretation of radargrams is still a specific task which only expert users can accomplish. As a radar probing system, in fact, the GPR is able to measure the backscattered EM waves from buried targets and the travel time of these signals, information which cannot be directly exploited, but that needs to be be used in inverse scattering problems for the evaluation of the dielectric properties and spatial positions of subsurface targets. Starting from a practical example of GPR employment — the reconstruction of pavement's vertical cross section — the evaluation of the two above-mentioned features is carried out through an energy-based method, which ensures high performances and robustness to signal interference.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132276887","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
Adjustment of resonant frequency of rectangular patch antennas by placing metallic walls or vias adjacent to their edges 通过在矩形贴片天线的边缘附近放置金属壁或过孔来调整其谐振频率
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605105
H. Oraizi, E. Forati
{"title":"Adjustment of resonant frequency of rectangular patch antennas by placing metallic walls or vias adjacent to their edges","authors":"H. Oraizi, E. Forati","doi":"10.1109/MMW.2010.5605105","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605105","url":null,"abstract":"A novel microstrip antenna configuration is proposed for the adjustment of its resonance frequency, where grounded metallic strips (as a groove filled with soldering tin or a line of metalized vias) are placed along the rectangular patch edges. The adjustment of the operating frequency may be performed by the gap spacings between the patch and strips. The proposed patch antenna configuration leads to the reduction of its size and also limits the propagation of surface waves on the substrate, which increases the overall radiation efficiency.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133033216","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
S-band hybrid 4 bit phase shifter s波段混合式4位移相器
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605128
Eser Erkek, S. Demir
{"title":"S-band hybrid 4 bit phase shifter","authors":"Eser Erkek, S. Demir","doi":"10.1109/MMW.2010.5605128","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605128","url":null,"abstract":"S-band hybrid 4 bit phase shifter of 22.5° phase resolution is designed, simulated, fabricated and measured. Bits are separately designed to maintain low phase errors and return loss. In this manner, fabrication and measurements are performed for each bit. These measurements are carried on since each bit reached to its acceptable level of operation. According to the outcomes and acquired knowledge, layout for optimum cascading of 4 bits is developed. Measurement results are compared with simulations and repeatability is tested to observe if it is convenient to use in mass production. Designs and simulations are performed by using ADS2008®.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122260962","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
A frequency tunable amplifier for DCS-1800, PCS-1900, DECT and UMTS 频率可调放大器，适用于DCS-1800, PCS-1900, DECT和UMTS
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605171
T. Nesimoglu
{"title":"A frequency tunable amplifier for DCS-1800, PCS-1900, DECT and UMTS","authors":"T. Nesimoglu","doi":"10.1109/MMW.2010.5605171","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605171","url":null,"abstract":"The trade-off between efficiency and tunability has been revealed in frequency-tunable amplifiers. Several tunable amplifiers have been designed using various varactor diode topologies and their performances are compared. Simulation results demonstrate that the tunable amplifiers using anti-series distortion-free varactor stack (DFVS) topologies provide superior tunability and power added efficiency (PAE) than those using conventional varactor diode topologies. A tunable amplifier is designed that can tune from 1.74-to-2.36 GHz and provide 42% PAE. This range of tunability is sufficient to accommodate DCS-1800, PCS-1900, DECT and UMTS standards, and thus it may help to reduce the complexity of multimode and reconfigurable radios.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122261336","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
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