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1-bit RF-MEMS-reconfigurable elementary cell for very large reflectarray 1位rf - mems可重构基本单元用于非常大的反射
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605147
S. Montori, E. Chiuppesi, L. Marcaccioli, R. V. Gatti, R. Sorrentino
{"title":"1-bit RF-MEMS-reconfigurable elementary cell for very large reflectarray","authors":"S. Montori, E. Chiuppesi, L. Marcaccioli, R. V. Gatti, R. Sorrentino","doi":"10.1109/MMW.2010.5605147","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605147","url":null,"abstract":"This paper presents a reconfigurable MEMS based radiating element for the realization of a beam steering reflectarray. The elementary cell consists of a square patch slotcoupled to a phase shifting circuit with 1-bit phase resolution (0°/180°), operating at 76.5GHz. Reconfigurability is obtained with RF MEMS switches integrated in the elementary cell. The problem of reconfigurability of reflectarray antennas based on RF MEMS technology is addressed within the European FP7 project called ARASCOM. Since thousands of reconfigurable elementary cells are employed, reducing the number of tuneable components is of fundamental importance for the practical realization of the reflectarray. A dramatic reduction of the number of tuneable devices is shown to be achievable without performance degradation by a proper architecture based on 1-bit digital phase shifting. In this paper the elementary cell design and the reflectarray fabrication technology are illustrated in some details showing the feasibility of the proposed approach.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"40 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":"115892574","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
Target recognition by self-organizing map (SOM) type unsupervised clustering using electromagnetic scattered signals in resonance region 基于共振区电磁散射信号的自组织映射(SOM)无监督聚类目标识别
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605193
G. Turhan‐Sayan, Tufan Taylan Katilmis, Eren Sila Sayan
{"title":"Target recognition by self-organizing map (SOM) type unsupervised clustering using electromagnetic scattered signals in resonance region","authors":"G. Turhan‐Sayan, Tufan Taylan Katilmis, Eren Sila Sayan","doi":"10.1109/MMW.2010.5605193","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605193","url":null,"abstract":"This paper investigates the use of unsupervised learning for electromagnetic target recognition in resonance region. Wigner distribution based target features extracted from late-time target responses at arbitrarily observed aspect angles are used to design a target classifier by using the self-organized map (SOM) algorithm. Effects of having unequal amounts of training data for different library targets are investigated in particular. Small scale aircraft modeled by conducting wires are used as test targets in demonstrations.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"49 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":"132415293","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
Computation of the temperature-rise in the human head due to different mobile phone models 计算不同手机型号对人头部温升的影响
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605152
S. I. Al-Mously
{"title":"Computation of the temperature-rise in the human head due to different mobile phone models","authors":"S. I. Al-Mously","doi":"10.1109/MMW.2010.5605152","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605152","url":null,"abstract":"In this paper, the temperature rise in the user's head due to different mobile phone models is computed for a realistic usage pattern, where the Pennes Bioheat Equation is solved using a conformal Finite-Difference Time-Domain (FDTD)-based electromagnetic solver, SEMCAD X. A heterogeneous High Resolution European Female Head (HR-EFH) with twenty five different tissues is used to simulate the human head, whereas four semi-realistic CAD models, i.e., candy-bar with external antenna, candy-bar with internal antenna, clamshell with external antenna, and clamshell with internal antenna, operating at 900 MHz with antenna output power of 600 mW are used to simulate the commercially available mobile phone models. The results show different temperature rise values in the user's head due to the different mobile phone handset models.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"28 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":"134286964","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
Foetal ECG extraction using broadband signal subspace decomposition 利用宽带信号子空间分解提取胎儿心电
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605155
Soydan Redif, U. Fahrioğlu
{"title":"Foetal ECG extraction using broadband signal subspace decomposition","authors":"Soydan Redif, U. Fahrioğlu","doi":"10.1109/MMW.2010.5605155","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605155","url":null,"abstract":"In this paper, we consider the extraction of foetal electrocardiogram (ECG) signals from cutaneous electrode recordings. Most existing methods cannot account for the broadband nature of the ECG signals, producing foetal ECG (FECG) estimates that are not sufficiently accurate. We propose a novel way of addressing this problem: the broadband equivalent of principal component analysis (PCA) is applied through the use of an algorithm that generalises the eigenvalue decomposition (EVD) to polynomial matrices; FECG extraction is achieved by way of an orthonormal projection of the data onto the broadband foetal subspace, whereby the maternal ECG and noise components are suppressed. The algorithm is contrasted with conventional PCA and the classical multi-reference adaptive noise cancelling method. The three techniques are applied to real multi-channel ECG recordings obtained from a pregnant woman. A qualitative comparison indicates that the proposed algorithm is more robust and yields cleaner FECG estimates.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"15 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":"128059274","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: 11
Configurable microwave structures for software defined (and cognitive) radio front ends 用于软件定义(和认知)无线电前端的可配置微波结构
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605142
P. Warr, G. Hilton
{"title":"Configurable microwave structures for software defined (and cognitive) radio front ends","authors":"P. Warr, G. Hilton","doi":"10.1109/MMW.2010.5605142","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605142","url":null,"abstract":"Both Software Defined Radio and Cognitive Radio require a flexible transceiver front end. This paper introduces solutions to two important features of such a device; the antenna and the filter. These are both microwave resonant structures and so share design trade-offs and restrictions; in this application they must both offer some degree of tunability or wideband performance. MEMS technology is proposed as the enabler for reconfigurability in the distributed microwave structures. This technology overcomes the shortcomings of both large-scale mechanical devices and semiconductor-based solutions.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"53 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":"127289465","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
Propagation of microwaves in periodic layered media 微波在周期性层状介质中的传播
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605118
A. Ozturk, R. Suleymanli, B. Aktaş, A. Teber
{"title":"Propagation of microwaves in periodic layered media","authors":"A. Ozturk, R. Suleymanli, B. Aktaş, A. Teber","doi":"10.1109/MMW.2010.5605118","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605118","url":null,"abstract":"We introduce a simplified structure made of periodic metallic layers on a glass substrate that offer a potentially simpler approach in building photonic crystals. Using microwave experiments and Fresnel formulas, we have investigated the refractive index properties of these structures. We have measured experimentally both the transmittance and the reflectance properties and found unambiguously that the refractive index of the periodic layered medias decreased depending on periodicity of the geometric arrangement, dielectric contrast and filling fraction of metallic layers. Our results show the effects of thin metallic layers on the refractive index, reflection and transmission properties of a multilayer periodic structure. It was shown that metallic layers lead to substantial transformation of interference patterns which can be interpreted as a result of interference in a uniform media with a small (n<1)refractive index.","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":"125425766","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
Broadband antenna for GSM, UMTS and LTE Wi-Max applications 用于GSM, UMTS和LTE Wi-Max应用的宽带天线
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605137
M. Abbak, I. Akduman
{"title":"Broadband antenna for GSM, UMTS and LTE Wi-Max applications","authors":"M. Abbak, I. Akduman","doi":"10.1109/MMW.2010.5605137","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605137","url":null,"abstract":"This paper la y outs the proposed novel broadb and suspended plat e antenna folded patch feed. It is appr opriate for distinctive applications which include GSM, U MTS, WLAN and LTE Wi-Max technologies. Simula tions are performed using a EM softw are package HF SS. Fr om the simulations of t he proposed ante nna, impe dance bandw idth of 65. 6 % obtaine d between the frequencies of 1.71GHz and 3.38GHz","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"10 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":"128945946","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
Discrete component design of broadband impedance transforming filter for distributed power amplifiers 分布式功率放大器宽带阻抗变换滤波器的离散元件设计
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605173
K. Narendra, Chacko Prakash, R. Jansen, B. Yarman
{"title":"Discrete component design of broadband impedance transforming filter for distributed power amplifiers","authors":"K. Narendra, Chacko Prakash, R. Jansen, B. Yarman","doi":"10.1109/MMW.2010.5605173","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605173","url":null,"abstract":"A new topology distr ibuted pow er amplifie r (DPA) is presented to maximize DC-RF conversion (i.e. for high output) [7]. The topology is featured by vectorially combined current sources when loading power transist ors into a distr ibuted output and input ne tworks using impe dance ter mination values gathe red by device load pull. Br oadband impe dance tr ansforming filter with Real Frequency Technique (RFT) i s pro posed to transform the DPA output impedance i.e. 12 Ω to 50 Ω termination over the frequency band of 100–2200 MHz.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"261 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":"122466848","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
An integrated homeland security surveillance system 综合国土安全监视系统
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605175
S. Uysal, M. Konca, H. Demirel, A. Hocanin
{"title":"An integrated homeland security surveillance system","authors":"S. Uysal, M. Konca, H. Demirel, A. Hocanin","doi":"10.1109/MMW.2010.5605175","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605175","url":null,"abstract":"We propose a novel module as the main building block of a wireless surveillance system for homeland security applications. The proposed module houses processors (DC, IF and Microwave), cameras and batteries rechargeable by solar energy. Conformal solar panel and antenna are mounted on at least two of its surfaces. At least one inclined surface for maximum sunlight exposure is required for the solar panel. Multi-beam property of the antenna together with the module side adjustment will cover a complete hemisphere which satisfies the line of sight communication at the desired microwave ISM band. A standard module has a fixed inside housing for processors and cameras and adjustable inclined surfaces for the solar panel and antenna mounting.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"34 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":"114086733","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
Comparing miniaturization techniques for microstrip 180° hybrid ring junctions 微带180°杂化环结微型化技术比较
2010 10th Mediterranean Microwave Symposium Pub Date : 2010-10-18 DOI: 10.1109/MMW.2010.5605129
D. Psychogiou, J. Hesselbarth
{"title":"Comparing miniaturization techniques for microstrip 180° hybrid ring junctions","authors":"D. Psychogiou, J. Hesselbarth","doi":"10.1109/MMW.2010.5605129","DOIUrl":"https://doi.org/10.1109/MMW.2010.5605129","url":null,"abstract":"Several miniaturization approaches are applied to microstrip 180° hybrid ring junctions designed for a frequency of operation of 2 GHz. These ring junctions are compared in terms of occupied area on the circuit board, frequency bandwidth and power loss. The miniaturization techniques include open stubs added, lumped-element capacitive shunt loading, stepped-impedance slow-wave lines and series-connected EBG cells. Generally observable trends show that bandwidth is linearly proportional to the occupied board area and power loss is inversely linear proportional to area. Small deviations from these trends, for specific miniaturization approaches, are discussed in the paper.","PeriodicalId":145274,"journal":{"name":"2010 10th Mediterranean Microwave Symposium","volume":"195 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":"132272696","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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