Advances in Array Optimization最新文献

Characterization of Printed Podal Vivaldi Antenna (8–18 GHz) on RT Duroid with Single and Double Cavity 单腔和双腔RT Duroid上印刷Podal Vivaldi天线(8-18 GHz)的特性

Advances in Array Optimization Pub Date : 2019-11-08 DOI: 10.5772/INTECHOPEN.88727

P. Madhav, M. Prasad

{"title":"Characterization of Printed Podal Vivaldi Antenna (8–18 GHz) on RT Duroid with Single and Double Cavity","authors":"P. Madhav, M. Prasad","doi":"10.5772/INTECHOPEN.88727","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.88727","url":null,"abstract":"In today’s modern communication systems, miniaturized and lightweight subsystems covering broad bandwidth are in much demand as they lead to realization of very compact and lightweight systems. A printed podal Vivaldi antenna with single as well as double cavities fed with strip line transmission line and operating from X band to K U band (8–18 GHz) is proposed. The comparison of antenna performance for single cavity and double cavity is also reported. Using double cavity, the miniaturization of antenna is possible as compared to single cavity Vivaldi antenna. The antenna is first designed using conventional theoretical approaches. Later, it is simulated using a 3D EM simulation software, CST Microwave Studio TM . The optimal value for taper length is 6.86455 cm and cavity diameter is 1.582 cm. Finally, the design is physically fabricated using PCB technology for carrying out practical measurement. The antenna’s input impedance characteristic is measured in the form of S-parameter and VSWR using Vector network analyzer. VSWR less than 3:1 is achieved over the band from 8 to 18 GHz. The radiation pattern measurements are carried out in anechoic chamber. The proposed Vivaldi antenna is used for digital data transmission via satellites and for voice/audio transmissions.","PeriodicalId":307301,"journal":{"name":"Advances in Array Optimization","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116767030","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

Pattern Synthesis in Time-Modulated Arrays Using Heuristic Approach 基于启发式方法的时调制阵列方向图合成

Advances in Array Optimization Pub Date : 2019-11-06 DOI: 10.5772/intechopen.89479

Sujit Kumar Mandal, Ananya Mukherjee, Sujoy Mandal, Tanmoy Das

{"title":"Pattern Synthesis in Time-Modulated Arrays Using Heuristic Approach","authors":"Sujit Kumar Mandal, Ananya Mukherjee, Sujoy Mandal, Tanmoy Das","doi":"10.5772/intechopen.89479","DOIUrl":"https://doi.org/10.5772/intechopen.89479","url":null,"abstract":"Time-modulation principle evolves as an emerging technology for easy realization of the desired array patterns with the help of an additional degree of freedom, namely, “ time. ” To the antenna community, the topic, time-modulated antenna array (TMAA) or 4D antenna arrays, has got much attention during the last two decades. However, population-based, stochastic, heuristic evolutionary algorithm plays as an important protagonist to meet the essential requirements on synthesizing the desired array patterns. This chapter is basically devoted to understand the theory of different time-modulation principles and the application of optimization techniques in solving different antenna array synthesis problems. As a first step, the theory of time-modulation principles and the behaviors of the sideband radiation (SBR) that appeared due to time modulation have been studied. Then, different important aspects associated with TMAA synthesis problems have been discussed. These include conflicting parameters, the need of evolutionary algorithms, multiple objectives and their optimization, cost function formation, and selection of weighting factors. After that, a novel approach to design a time modulator for synthesizing TMAAs is presented. Finally, discussing the working principle of an efficient heuristic approach, namely, artificial bee colony (ABC) algorithm, the effectiveness of the time modulator and potentiality of the algorithm are presented through representative numerical examples.","PeriodicalId":307301,"journal":{"name":"Advances in Array Optimization","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128052733","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

Design of Reconfigurable Multiple-Beam Array Feed Network Based on Millimeter-Wave Photonics Beamformers 基于毫米波光子波束形成器的可重构多波束阵列馈电网络设计

Advances in Array Optimization Pub Date : 2019-09-28 DOI: 10.5772/intechopen.89076

Mikhail E. Belkin, Dmitriy A. Fofanov, Tatiana N. Bakhvalova, Alexander S. Sigov

{"title":"Design of Reconfigurable Multiple-Beam Array Feed Network Based on Millimeter-Wave Photonics Beamformers","authors":"Mikhail E. Belkin, Dmitriy A. Fofanov, Tatiana N. Bakhvalova, Alexander S. Sigov","doi":"10.5772/intechopen.89076","DOIUrl":"https://doi.org/10.5772/intechopen.89076","url":null,"abstract":"In this chapter, elaborating the direction of designing photonics-based beamforming networks (BFN) for millimeter-wave (mmWave) antenna arrays, we review the worldwide progress referred to designing multiple-beam photonics BFN and highlight our last simulation results on design and optimization of millimeterphotonics-based matrix beamformers. In particular, we review the specialties of mmWave photonics technique in 5G mobile networks of Radio-over-Fiber (RoF) technology based on fiber-wireless architecture. In addition, the theoretical background of array antenna multiple-beam steering using ideal models of matrix-based phase shifters and time delay lines is presented including a general analysis of radiation pattern sensitivity to compare updated photonics beamforming networks produced on phase shifter or true-time delay approach. The principles and ways to optimized photonics BFN design are discussed based on the study of photonics BFN scheme including integrated 8 8 optical Butler matrix (OBM). All schemes are modeled using VPIphotonics Design Suite and MATLAB software tools. In the result of simulation experiments, the outcome is obtained that both the integrated optical Butler matrix itself and the BFN based on it possess an acceptable quality of beams formation in a particular 5G pico-cell.","PeriodicalId":307301,"journal":{"name":"Advances in Array Optimization","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124118984","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

Antenna Pattern Multiplexing for Enhancing Path Diversity 增强路径分集的天线方向图复用

Advances in Array Optimization Pub Date : 2019-09-23 DOI: 10.5772/intechopen.89098

M. Saito

{"title":"Antenna Pattern Multiplexing for Enhancing Path Diversity","authors":"M. Saito","doi":"10.5772/intechopen.89098","DOIUrl":"https://doi.org/10.5772/intechopen.89098","url":null,"abstract":"In this chapter, we show the concept of antenna pattern multiplexing (APM), which enhances path diversity gain and antenna pattern diversity reception in multipath rich fading environment. We discuss the types of antennas that achieve the APM, i.e., generating time-varying antenna pattern and the benefits of reducing antenna size and hardware cost. When electronically steerable passive array radiator (ESPAR) antenna is used, the benefits can be maximised. A model of receiving process is proposed for analysing the ergodic capacity of multiple-input multiple-output (MIMO) systems using APM. We derive a model of received signals to analyse the system performance. The received signal in matrix form includes an equivalent channel matrix, which is a product of antenna pattern matrix, the channel coefficient vector for each output. Numerical results in terms of ergodic capacity show the comparable performances of the proposed MIMO with APM to the conventional MIMO systems; in particular, the number of arrival paths and the number of antenna pattern are sufficiently large. Also the ergodic capacity can be equivalent to that of the conventional MIMO systems when the average SNR per antenna pattern is constant among the virtual antennas.","PeriodicalId":307301,"journal":{"name":"Advances in Array Optimization","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128704637","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

Convex Optimization and Array Orientation Diversity-Based Sparse Array Beampattern Synthesis 基于凸优化和阵列方向分集的稀疏阵列波束图合成

Advances in Array Optimization Pub Date : 2019-09-10 DOI: 10.5772/intechopen.88881

Hui Chen, Q. Wan

引用次数: 0

Reflectarray Pattern Optimization for Advanced Wireless Communications 先进无线通信的反射射线模式优化

Advances in Array Optimization Pub Date : 2019-09-05 DOI: 10.5772/intechopen.88909

D. R. Prado, M. Arrebola, M. Pino

引用次数: 2