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Статті в журналах з теми "Reconfigurable and scanning antenna arrays"
Ndimubandi, Samuel de Jésus, Xiao Ding, and Yu Zeng. "A Wide-Angle Scanning Planar Array Based on Four-Mode Pattern-Reconfigurable Elements." International Journal of RF and Microwave Computer-Aided Engineering 2023 (February 8, 2023): 1–8. http://dx.doi.org/10.1155/2023/7871837.
Повний текст джерелаArce, Armando, Enrique Stevens-Navarro, Marco Cardenas-Juarez, Ulises Pineda-Rico, Jorge Simon, and Marco A. Panduro. "Design and Optimization of a Coherent Beamforming Network for an Aperiodic Concentric Ring Array." International Journal of Antennas and Propagation 2019 (May 6, 2019): 1–10. http://dx.doi.org/10.1155/2019/4601718.
Повний текст джерелаHajj, Mohamad, Moustapha Salah Toubet, Yasser Abdallah, Regis Chantalat, and Bernard Jecko. "A NOVEL BEAM SCANNING/DIRECTIVITY RECONFIGURABLE M-EBG ANTENNA ARRAY." Progress In Electromagnetics Research C 29 (2012): 55–66. http://dx.doi.org/10.2528/pierc11112207.
Повний текст джерелаLi, Ming, Haiping Wei, Jiahao Zhao, Qingchang Tao, and Zheng You. "A Novel Linear Sparse Array with Reconfigurable Pixel Antenna Elements." International Journal of Antennas and Propagation 2020 (April 23, 2020): 1–13. http://dx.doi.org/10.1155/2020/3624563.
Повний текст джерелаJin, Yitong, Yuanqing Chen, Yafei Ding, Ziwen Zou, Feng Qian, Yong Luo, and Guangli Yang. "A Low-Profile SIW-Based CTS Array with Reconfigurable Four Beams and Dual Polarizations for K-Band Sensing." Sensors 22, no. 9 (May 7, 2022): 3563. http://dx.doi.org/10.3390/s22093563.
Повний текст джерелаOuyang, Jun, Feng Yang, and Shiwen Yang. "A novel radiation pattern reconfigurable microstrip antenna for wide-angle scanning application in phased antenna array." Microwave and Optical Technology Letters 50, no. 6 (2008): 1539–40. http://dx.doi.org/10.1002/mop.23429.
Повний текст джерелаWang, Zhangjing, Xing Fan, Haijuan Cui, and Shaoqiu Xiao. "Design and Analysis of Thinned Array Pattern Reconfigurable Antenna to Enlarge the Scanning Range." International Journal of Antennas and Propagation 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/7487020.
Повний текст джерелаCao, Yuanxi, Penghao Feng, and Sen Yan. "Design of a pattern reconfigurable antenna for wide‐angle scanning phased array applications." Microwave and Optical Technology Letters 64, no. 5 (March 11, 2022): 953–61. http://dx.doi.org/10.1002/mop.33215.
Повний текст джерелаHaider, Nadia, Alexander G. Yarovoy, and Antoine G. Roederer. "$L/S$ -Band Frequency Reconfigurable Multiscale Phased Array Antenna With Wide Angle Scanning." IEEE Transactions on Antennas and Propagation 65, no. 9 (September 2017): 4519–28. http://dx.doi.org/10.1109/tap.2017.2722685.
Повний текст джерелаWang, Ziyang, Xiaotian Pan, Fan Yang, Shenheng Xu, and Maokun Li. "Real-Time Mode Switching and Beam Scanning of High-Gain OAM Waves Using a 1-Bit Reconfigurable Reflectarray Antenna." Electronics 9, no. 12 (December 18, 2020): 2181. http://dx.doi.org/10.3390/electronics9122181.
Повний текст джерелаДисертації з теми "Reconfigurable and scanning antenna arrays"
Gheethan, Ahmad. "Novel Pattern Reconfigurable Antenna Arrays Using Engineered Metamaterials and Microfluidic Principles." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5223.
Повний текст джерелаRodenbeck, Christopher Timothy. "Novel technologies and techniques for low-cost phased arrays and scanning antennas." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/1053.
Повний текст джерелаButtazzoni, Giulia. "Study and development of power synthesis techniques of arbitrary reconfigurable antenna arrays for satellite applications." Doctoral thesis, Università degli studi di Trieste, 2013. http://hdl.handle.net/10077/8536.
Повний текст джерелаThe material presented in this thesis is the result of the Ph.D. activity carried on between January 2009 and December 2012 at the Ph.D. school in Information Engineering of the University of Trieste. After a brief introduction on the involved topics, the final objective of this thesis is that of presenting the original results, consisting in the development of power pattern synthesis algorithms for arbitrary antenna arrays including, in particular, arrays for satellite applications. Since the earlier satellite missions of last century, satellite communication systems have received growing attention due to the opportunities they offer and their greater flexibility with respect to alternative solutions adopting other media, such as, for example, fiber optic cables. The enormous spread of satellites, for both military and civilian applications, has been achieved thanks to the experienced technological progress, which has allowed an increase of satellite capacities. The need of constantly increasing the capacity of commercial communications satellites resulted in the continuing evolution of the antenna systems onboard the satellites. The business environment has driven the architecture of satellites' systems towards more efficiency and cost consciousness while at the same time, providing flexible access to a growing diversity of services and customers. Antennas that provide a multiplicity of frequency reuse coverage beams through either spatial or polarization isolation have been developed, resulting in the evolution of satellite antennas from a simple omnidirectional dipole to multiple-beam, dual-polarized configurations with frequency reuse between the beams for increased capacity. These requirements translate into high-gain, high-efficiency antennas with low side-lobe levels and excellent polarization purity. Moreover, since new requirements are often determined after the satellite is operational, antennas adjustable to produce a wide variety of radiation patterns have become popular. These are the so-called multiple-beam antennas, which can adjust their radiation coverage areas according to new demands. Multiple-beam antennas are currently being used for direct-broadcast satellites, personal communication satellites, military communication satellites, and high-speed Internet applications. High-gain multiple-beam antenna systems usually take one of three generic forms: lens, reflector or direct radiating array. Thus, arrays of antennas can be used in multiple-beam systems either to feed other types of antennas, or directly as radiating structures. The material of this thesis is mainly related to the synthesis algorithms for antenna arrays. In particular, many analytical and numerical techniques for the power pattern synthesis of antenna arrays have been carefully studied and analyzed. Some of them are suitable only for linear or rectangular arrays, the others for arrays of more complicated geometries. Furthermore, it is extremely important, for power synthesis techniques in satellite applications, to be able to consider additional constraints. These typically are the phase-only reconfigurability of the radiated beams, the control of the cross-polar patterns, which allows the polarization re-use and/or the control of the cross-polar interference, the dynamic range ratio reduction which comports simpler feeding networks and lower mutual coupling between array elements, and the near-field reduction, which allows to take into account the antennas operating environment. A numerical iterative algorithm has been developed during the Ph.D. school in Information Engineering, suitable for arrays of arbitrary geometry, thus including sparse and conformal arrays, which are often used in satellite applications. The algorithm allows to solve the power pattern synthesis problem, which is an inherently non linear problem. The solution is achieved using the alternating projections algorithm, which is a numerical iterative technique for finding a point of the intersection between two sets. It will be seen that the projections method has previously already been applied to problems of image processing and also in the antenna pattern synthesis. However, the results and the computational burden are strongly related to the projection operators, which in turn, strictly depend on the definition of the adopted distance, thus on the definition of the sets adopted in the formulation of the problem. Thus, the main originality of the developed algorithms consists in an extremely advantageous definition of the sets involved in the solving scheme, which, along with the adopted distance, allow an easy evaluation of the projection operators and thus a simple solving procedure. The thesis is organized as follows. Chapter 1 introduces the satellite antennas, analyzing some solutions adopted in the past. Particular attention is devoted to multiple-beam antennas (MBAs) and in particular to arrays of antennas, which can constitute the feeding system of reflector MBAs, or which can be used as direct radiating antennas themselves. Chapter 2 presents analytical and numerical methods of power pattern synthesis for antenna arrays proposed in the literature. First, the classical analytical methods, suitable for linear arrays of equally spaced elements are presented. Then, numerical iterative methods are analyzed. Attention is devoted to both deterministic and stochastic algorithms. A section is dedicated to the near-field constraint, due to its importance in practical real applications. In fact, taking into account the effect of the antenna operating environment is of fundamental importance: obstacles or mounting platforms, as well as other electronic devices located in proximity of the antenna, may strongly degrade the radiated far-field pattern. Then, Chapter 3 presents the developed algorithm. Precisely, the evolution is described from a synthesis algorithm suitable for arbitrary phase-only reconfigurable arrays to a powerful algorithm for phase-only antenna arrays, including several additional constraints, such as the dynamic range ratio reduction, the cross-polar pattern synthesis and the near-field reduction. Moreover, in its final form, the algorithm also allows to minimize the power radiated in the side-lobe regions of both the co- and cross-polar patterns and the electric energy stored in the near-field region of interest. Numerical results validating the effectiveness of the proposed algorithm are presented in Chapter 4 and the conclusions are summarized in Chapter 5. Finally, the appendix mathematically describes the classical alternating projections method and the genetic algorithms, which have been used as global optimization algorithms for comparison purposes.
Il materiale presentato in questa tesi è il risultato dell'attività svolta durante il dottorato tra gennaio 2009 e dicembre 2012 presso la scuola di dottorato in ingegneria dell'informazione dell'università di Trieste. Dopo una breve introduzione sugli argomenti trattati, l'obiettivo ultimo della tesi è quello di presentare i risultati originali che consistono nello sviluppo di algoritmi di sintesi di potenza per antenne a schiera di geometria arbitraria tra le quali, in particolare, schiere per applicazioni satellitari. Fin dalle prime missioni spaziali del secolo scorso, le comunicazioni satellitari hanno ricevuto attenzione crescente grazie alle opportunità che offrono e alla loro maggior flessibilità rispetto a soluzioni alternative che utilizzano altri sistemi, come ad esempio i cavi in fibra ottica. Grazie agli sviluppi tecnologici avvenuti, che hanno reso possibile un aumento delle capacità dei satelliti, si è sperimentata una vasta diffusione di satelliti per applicazioni militari e civili. La necessità di aumentare costantemente la capacità dei satelliti per comunicazioni commerciali ha comportato una continua evoluzione delle antenne da satellite. L'ambiente commerciale ha spinto l'architettura dei sistemi satellitari verso una miglior consapevolezza di efficienza e costi consentendo, allo stesso tempo, un accesso flessibile a un sempre maggior numero di servizi e di utenti. Sono state sviluppate antenne che consentono una molteplicità di fasci con riutilizzo della frequenza grazie ad isolamento spaziale o di polarizzazione. Questo ha generato un'evoluzione delle antenne da satellite dal semplice dipolo omnidirezionale ad antenne a fascio multiplo, con alto guadagno, alta efficienza, bassi lobi laterali ed elevata purezza di polarizzazione. Inoltre, poichè nuove necessità spesso emergono una volta che il satellite è già operativo, si sono diffuse antenne da satellite configurabili in modo da poter produrre diversi diagrammi di radiazione. Queste sono le così dette antenne riconfigurabili, che possono modificare le regioni coperte in base a nuove necessità. Antenne a fascio multiplo vengono usate correntemente in trasmissioni dirette via satellite, satelliti per comunicazioni personali, satelliti per comunicazioni militari e applicazioni Internet ad alta velocità. I sistemi di antenne a fascio multiplo ad elevato guadagno generalmente sono di uno dei seguenti tre tipi: lenti, riflettori o antenne a schiera. Dunque le antenne a schiera si possono trovare nelle applicazioni satellitari sia come strutture per alimentare altri tipi di antenne, sia come strutture radianti direttamente. Il materiale presentato in questa tesi è principalmente legato agli algoritmi di sintesi per antenne a schiera. In particolare, sono stati attentamente studiati e analizzati diversi metodi, analitici e numerici, per la sintesi di potenza di antenne a schiera. Alcuni di questi sono applicabili solo a schiere lineari o rettangolari, altri a schiere di geometria più complicata. Inoltre, è estremamente importante per gli algoritmi di sintesi di potenza di schiere per applicazioni satellitari essere in grado di considerare vincoli addizionali. Questi tipicamente sono la riconfigurabilità del fascio tramite controllo di sola fase, il controllo del diagramma cross-polare, che permette di ottenere il riutilizzo di polarizzazione e/o di controllare l'interferenza cross-polare, la riduzione della dinamica, che permette l'utilizzo di reti di alimentazione più semplici e un abbassamento del mutuo accoppiamento tra gli elementi della schiera, e la riduzione del campo vicino, che permette di tener conto dell'ambiente in cui opera l'antenna. Durante il dottorato è stato sviluppato un algoritmo numerico iterativo per schiere di geometria arbitraria, perciò comprese le schiere sparse e conformi, spesso impiegate in applicazioni satellitari. L'algoritmo permette di risolvere il problema (intrinsicamente non lineare) di sintesi di potenza. La soluzione è ottenuta mediante l'impiego del metodo delle proiezioni succesive, un metodo numerico iterativo per trovare un punto nell'intersezione tra due insiemi. Tale metodo è stato usato in passato in problemi di elaborazione delle immagini e anche in problemi di sintesi di antenne a schiera. Ciononostante, i risultati e il carico computazionale sono direttamente legati ai proiettori, che a loro volta sono strettamente dipendenti dalla definizione della distanza adottata, dunque degli insiemi coinvolti nel problema. Perciò, la principale originalità degli algoritmi sviluppati consiste in una definizione degli insiemi estremamente vantaggiosa in quanto, assieme alla scelta della distanza, permette di valutare facilmente i proiettori e perciò permette di ottenere una procedura di soluzione semplice. La tesi è organizzata come segue. Il primo capitolo introduce le antenne da satellite analizzando alcune soluzioni utilizzate in passato. Particolare attenzione è rivolta alle antenne a fascio multiplo e in particolare alle antenne a schiera, che possono costituire il sitema di alimentazione di antenne a riflettore multifascio o che possono esse stesse essere usate come elementi radianti. Il secondo capitolo presenta metodi analitici e numerici per la sintesi di potenza per antenne a schiera proposti in letteratura. Dapprima vengono presentati i metodi analitici classici, validi per schiere lineari di elementi equispaziati. Successivamente vengono analizzati i metodi numerici iterativi, sia stocastici, sia deterministici. Una sezione a parte è dedicata al vincolo sul campo vicino, vista la grande importanza che riveste nelle applicazioni pratiche. Infatti è di fondamentale importanza tener conto degli effetti dell'ambiente in cui l'antenna opera in quanto ostacoli o strutture di montaggio, così come altri apparati elettronici in prossimità dell'antenna, possono causare forti interferenze e degradare notevolmente il diagramma di campo lontano. Il capitolo 3 presenta gli algoritmi sviluppati. Precisamente, viene delineata l'evoluzione da un algoritmo di sintesi di potenza per schiere riconfigurabili di geometria arbitraria con controllo si sola fase, a un potente algoritmo di sintesi di sola fase con diversi vincoli addizionali, quali la riduzione della dinamica, la sintesi del fascio cross-polare e la riduzione del campo vicino. Inoltre, nella sua forma finale, l'algoritmo permette di minimizzare la potenza irradiata nelle regioni di lobi laterali di entrambi i diagrammi, co- e cross- polare, e l'energia immagazzinata nella regione di campo vicino presa in considerazione. I risultati numerici che provano l'efficacia del metodo sono presentati nel capitolo 4 e le conclusioni sono riassunte nel capitolo 5. Infine, l'appendice descrive matematicamente il classico metodo delle proiezioni successive e gli algoritmi genetici, che sono stati scelti come termine di paragone tra gli algoritmi di ottimizzazione globale.
XXIV Ciclo
1983
Nagesh, S. R. "Synthesis of Arbitrary Antenna Arrays." Thesis, Indian Institute of Science, 1995. http://hdl.handle.net/2005/160.
Повний текст джерелаPapantonis, Dimitrios Papantonis. "Tightly-Coupled Arrays with Reconfigurable Bandwidth." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503046689468305.
Повний текст джерелаYetisir, Ersin. "Novel Implementations of Wideband Tightly Coupled Dipole Arrays for Wide-Angle Scanning." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449120804.
Повний текст джерелаTowfiq, MD Asaduzzaman. "Application Aware Reconfigurable Antennas and Arrays for 5G and Beyond Wireless Communication Systems." DigitalCommons@USU, 2018. https://digitalcommons.usu.edu/etd/7250.
Повний текст джерелаKhalat, Abdurazag Mohamed. "Multifunctional Reconfigurable Antennas and Arrays Operating at 60 GHz band." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5616.
Повний текст джерелаNoordin, Nurul Hazlina. "Adaptive array antenna design for wireless communication systems." Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/8950.
Повний текст джерелаGokalp, Nihan. "Beam Steerable Meanderline Antenna Using Varactor Diodes And Reconfigurable Antenna Designs By Mems Switches." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609982/index.pdf.
Повний текст джерелаbeam-steerable meanderline antenna, dual circularly polarized meanderline antenna and dual-frequency slot-dipole array. Traveling wave meanderline antenna arrays are investigated in detail and a beam-steerable traveling wave meanderline antenna array has been introduced for X-band applications. Beam-steering capability of the antenna array has been achieved by loading the antenna elements with varactor diodes. Theoretical analysis and computer simulations of the proposed antenna have been verified with experimental results. Radiation direction of the 8-element meanderline array can be rotated 10°
by changing the varactor diode&rsquo
s bias voltage from 0V up to 20V. Also, a polarization-agile meanderline antenna array has been designed and simulated. Polarization of the circularly polarized meanderline array can be altered between right hand circularly polarized and left hand circularly polarized by using RF MEMS switches. The third type of reconfigurable antenna investigated in this thesis is a dual frequency slot-dipole array operating at X- and Ka-band. Electrical length of the slot dipoles has been tuned by using RF MEMS switches. Antenna prototypes have been manufactured for &lsquo
on&rsquo
and &lsquo
off&rsquo
states of RF MEMS switches and it has been shown that the operating frequency can be changed between 10 GHz and 15.4 GHz.
Частини книг з теми "Reconfigurable and scanning antenna arrays"
Zekavat, Seyed Alireza, and Carl R. Nassar. "Geometric-Based Statistical Channel Modeling for Beam-Pattern-Scanning Antenna Arrays." In Adaptive Antenna Arrays, 314–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-05592-2_18.
Повний текст джерелаArya, Ravi Kumar, Prashant Chaudhary, Anil Kumar Yerrola, Maifuz Ali, Abdelkhalek Nasri, and Raj Mittra. "Design of Conformal Antenna Arrays for Wide Angle Scanning." In PoliTO Springer Series, 193–213. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-87605-0_7.
Повний текст джерелаMailloux, Robert J. "Antenna Scanning Arrays." In Encyclopedia of RF and Microwave Engineering. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2005. http://dx.doi.org/10.1002/0471654507.eme019.
Повний текст джерелаDonelli, Massimo. "Applications of Advanced Reconfigurable Antenna for the Next Generation 4G Communication Devices." In Advances in Wireless Technologies and Telecommunication, 49–65. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8732-5.ch003.
Повний текст джерелаHaraz, Osama, Sultan Almorqi, Abdel-Razik Sebak, and Saleh A. Alshebeili. "High-Gain Broadband Antennas for 60-GHz Short-Range Wireless Communications." In Wideband, Multiband, and Smart Reconfigurable Antennas for Modern Wireless Communications, 72–122. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-8645-8.ch003.
Повний текст джерелаDonelli, Massimo. "Reconfigurable Antenna Systems for the Next Generation Devices Based on 4G/5G Standard." In Research Anthology on Developing and Optimizing 5G Networks and the Impact on Society, 44–65. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-7708-0.ch003.
Повний текст джерелаТези доповідей конференцій з теми "Reconfigurable and scanning antenna arrays"
Khidre, Ahmed, Fan Yang, and Atef Elsherbeni. "Radaition characteristics of linear phased arrays consisting of beam scanning reconfigurable antenna." In 2011 IEEE 4th International Symposium on Microwave, Antenna, Propagation, and EMC Technologies for Wireless Communications (MAPE). IEEE, 2011. http://dx.doi.org/10.1109/mape.2011.6156258.
Повний текст джерелаYe, Xiang-Lin, Xiao Ding, and Dimitris E. Anagnostou. "Pattern Reconfigurable Technique for Wide-Angle Scanning Array." In 2022 IEEE Conference on Antenna Measurements and Applications (CAMA). IEEE, 2022. http://dx.doi.org/10.1109/cama56352.2022.10002450.
Повний текст джерелаLi, Xiao-Fei, and Yong-Ling Ban. "A Novel Pattern Reconfigurable Antenna for 2-D Scanning Array." In 2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM). IEEE, 2019. http://dx.doi.org/10.1109/iwem.2019.8887931.
Повний текст джерелаKhairnar, Vikas V., C. K. Ramesha, and Lucy J. Gudino. "Reconfigurable beam scanning using hexagonal slotted parasitic patch antenna array." In 2016 International Conference on Signal Processing and Communications (SPCOM). IEEE, 2016. http://dx.doi.org/10.1109/spcom.2016.7746653.
Повний текст джерелаGan, Theng Huat, Peng Khiang Tan, Ankang Liu, Jian Lu, and Sek Meng Sow. "A Planar Wide-angle Scanning Array Using Pattern-Reconfigurable Antenna." In 2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI). IEEE, 2021. http://dx.doi.org/10.1109/aps/ursi47566.2021.9703868.
Повний текст джерелаMohamed, Himdi, Serhsouh Imane, and Lebbar Hassan. "New Feeding Methods for Reconfigurable Slotted SIW Antenna Arrays for Fixed Frequency Beam Scanning applications." In 2021 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE). IEEE, 2021. http://dx.doi.org/10.1109/apace53143.2021.9760591.
Повний текст джерелаLi, Wenxing, and Yueming Zhao. "A pattern reconfigurable patch antenna for wide-angle scanning phased array." In 2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES). IEEE, 2016. http://dx.doi.org/10.1109/ropaces.2016.7465428.
Повний текст джерелаWei, Chao Lei, Jing Li, and Guo Feng Gao. "Two-dimensional wide-angle scanning array with eight-direction pattern reconfigurable elements." In 2022 IEEE Conference on Antenna Measurements and Applications (CAMA). IEEE, 2022. http://dx.doi.org/10.1109/cama56352.2022.10002612.
Повний текст джерелаPal, Arpan, Amit Mehta, Rob Lewis, and Nathan Clow. "Reconfigurable phased array antenna enabling a high gain wide angle beam scanning." In 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2015. http://dx.doi.org/10.1109/aps.2015.7305492.
Повний текст джерелаSerhsouh, Imane, Mohamed Himdi, and Hassan Lebbar. "Reconfigurable Coplanar Slotted SIW Antenna Array for Fixed Frequency Beam Scanning Applications." In 2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM). IEEE, 2021. http://dx.doi.org/10.1109/antem51107.2021.9519008.
Повний текст джерела