Relevant bibliographies by topics / Active antenna

Academic literature on the topic 'Active antenna'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Active antenna"

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Sabban, Albert. "Active Compact Wearable Body Area Networks for Wireless Communication, Medical and IoT Applications." Applied System Innovation 1, no. 4 (November 23, 2018): 46. http://dx.doi.org/10.3390/asi1040046.

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The development of compact wearable antennas and transceivers for communication, IoT (Internet of Things), and biomedical systems will be presented in this paper. Development of Compact efficient wearable antennas is one of the major challenges in development of wearable communication, IoT, and medical systems. The main goal of wireless body area networks (BANs), WBANs, is to provide continuously medical data to the physician. Body area network (BAN) antennas should be flexible, lightweight, compact, and have low production cost. However, low efficiency is the major disadvantage of small printed antennas. Microstrip antennas resonant frequency is altered, due to environment conditions, different antenna locations, and different system operation modes. These disadvantages may be solved by using compact active and tunable antennas. A new class of wideband active wearable antennas for medical applications is presented in this paper. Amplifiers may be connected to the wearable antenna feed line to increase the system dynamic range. Small lightweight batteries supply the bias voltage to the active components. An active dual polarized antenna is presented in this paper. The active dual polarized antenna gain is 14 ± 3 dB for frequencies ranging from 380 to 600 MHz. The active transmitting dual polarized antenna output power is around 18 dBm. A voltage-controlled diode, varactor, may be used to control the antenna electrical performance at different environments. For example, an antenna located in patient stomach area has VSWR (Voltage Standing Wave Ratio) better than 2:1 at 434 MHz. However, if the antenna will be placed on the patient back, it may resonate at 420 MHz. By varying the varactor bias voltage, the antenna resonant frequency may be shifted from 420 to 434 MHz. An ultra-wideband passive and active printed slot antenna may be employed in wideband wearable communication systems. The active slot antenna gain is 13 ± 2 dB for frequencies from 800 MHz to 3 GHz.
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Kumari, Bibha, and Nisha Gupta. "Multifrequency Oscillator-Type Active Printed Antenna Using Chaotic Colpitts Oscillator." International Journal of Microwave Science and Technology 2014 (November 30, 2014): 1–10. http://dx.doi.org/10.1155/2014/675891.

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This paper presents a new concept to realize a multifrequency Oscillator-type active printed monopole antenna. The concept of period doubling route to chaos is exploited to generate the multiple frequencies. The chaotic Colpitts oscillator is integrated with the printed monopole antenna (PMA) on the same side of the substrate to realize an Oscillator-type active antenna where the PMA acts as a load and radiator to the chaotic oscillator. By changing the bias voltage of the oscillator, the antenna can be made to operate at single or multiple frequencies. To test the characteristics of the antenna at single and multiple frequencies of operation, two similar prototype models of printed monopole broadband antennas are developed. One of these antennas used at transmit side is fed by the chaotic Colpitts oscillator while the other is used as the receive antenna. It is observed that the antenna receives single or multiple frequencies simultaneously for particular values of the bias voltage of the oscillator at the transmit end.
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Ali, Khamis, Norun Abdul Malek, Ahmad Zamani Jusoh, Sarah Yasmin Mohamad, Zuhairiah Zainal Abidin, and Ani Liza Asnawi. "Design and optimize microstrip patch antenna array using the active element pattern technique." Bulletin of Electrical Engineering and Informatics 8, no. 3 (September 1, 2019): 994–1003. http://dx.doi.org/10.11591/eei.v8i3.1516.

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Microstrip patch antennas are widely used in modern day communication devices due to their light weight, low cost and ease of fabrication. In this paper, we have designed and fabricated two Microstrip Patch Antennas (slotted-ring and truncated-slotted ring) and array at 2.4 GHz for Wireless Local Area Network (WLAN) applications using Computer Simulation Technology, CST. The antenna design consists of rectangular radiating patch on Rogers RT5880 substrate and is excited by using coaxial probe feeding technique. The truncated-slotted ring has been designed on top of the radiating patch to improve bandwidth. The simulation and measurement results of the both antennas are in close agreement with each other. Due to the good agreement of simulation and measurement results of truncated-slotted ring antenna in comparison with slotted-ring antenna, it has been selected for antenna array design. The simulated and measured S11 of truncated-slotted ring antenna shows -21dB and -15.6 dB at 2.4 GHz respectively. Then, the antenna has been formed into 1x4 array in order to observe its beamforming capability. The proposed antenna array is suitable for 802.11b/g/n Wi-Fi standard which is proposed to be used for IoT.
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Capece, P. "Active SAR Antennas: Design, Development, and Current Programs." International Journal of Antennas and Propagation 2009 (2009): 1–11. http://dx.doi.org/10.1155/2009/796064.

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The paper presents the design guidelines for Active SAR Antennas followed for the development of COSMO Sky Med SAR Antenna Subsystem. They have brought to define the antenna architecture, the RF, and electrical requirements for all the antenna RF, digital and power units, taking into account the available technologies and achievable performance. The antenna design is described for what the main subsystems is concerned, such as RF, power, digital, including mechanical and thermal aspects. Finally the paper reports also a brief description of the most recent development carried out in Canada and in Europe in the last ten years, including the on-going programs.
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Ojaroudi Parchin, Naser, Haleh Jahanbakhsh Basherlou, Yasir Al-Yasir, Raed Abd-Alhameed, Ahmed Abdulkhaleq, and James Noras. "Recent Developments of Reconfigurable Antennas for Current and Future Wireless Communication Systems." Electronics 8, no. 2 (January 26, 2019): 128. http://dx.doi.org/10.3390/electronics8020128.

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Reconfigurable antennas play important roles in smart and adaptive systems and are the subject of many research studies. They offer several advantages such as multifunctional capabilities, minimized volume requirements, low front-end processing efforts with no need for a filtering element, good isolation, and sufficient out-of-band rejection; these make them well suited for use in wireless applications such as fourth generation (4G) and fifth generation (5G) mobile terminals. With the use of active materials such as microelectromechanical systems (MEMS), varactor or p-i-n (PIN) diodes, an antenna’s characteristics can be changed through altering the current flow on the antenna structure. If an antenna is to be reconfigurable into many different states, it needs to have an adequate number of active elements. However, a large number of high-quality active elements increases cost, and necessitates complex biasing networks and control circuitry. We review some recently proposed reconfigurable antenna designs suitable for use in wireless communications such as cognitive-ratio (CR), multiple-input multiple-output (MIMO), ultra-wideband (UWB), and 4G/5G mobile terminals. Several examples of antennas with different reconfigurability functions are analyzed and their performances are compared. Characteristics and fundamental properties of reconfigurable antennas with single and multiple reconfigurability modes are investigated.
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Wang, Congsi, Haihua Li, Kang Ying, Qian Xu, Na Wang, Baoyan Duan, Wei Gao, Lan Xiao, and Yuhu Duan. "Active Surface Compensation for Large Radio Telescope Antennas." International Journal of Antennas and Propagation 2018 (2018): 1–17. http://dx.doi.org/10.1155/2018/3903412.

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With the development of radio telescope antennas with large apertures, high gain, and wide frequency bands, compensation methods, such as mechanical or electronic compensation, are obviously essential to ensure the electrical performance of antennas that work in complex environments. Since traditional compensation methods can only adjust antenna pointing but not the surface accuracy, which are limited for obtaining high surface precision and aperture efficiency, active surface adjustment has become an indispensable tool in this field. Therefore, the development process of electrical performance compensation methods for radio telescope antennas is introduced. Further, a series of analyses of the five key technologies of active surface adjustment is presented. Then, four typical large antennas that have been designed with active main reflector technology are presented and compared. Finally, future research directions and suggestions for reflector antenna compensation methods based on active surface adjustment are presented.
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Parshina, E. S., and K. Yu Cheredeev. "USE OF AN ACTIVE PHASED ARRAY ANTENNA IN RADAR’S SIDE LOBES CANCELLATION SYSTEM." Issues of radio electronics, no. 1 (January 20, 2019): 19–23. http://dx.doi.org/10.21778/2218-5453-2019-1-19-23.

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The paper describes an example of designing the radar’s side lobes cancellation system. It is based on the scheme of one channel interference canceler. The analysis of the antennas, which are ussually used in radar’s side lobes cancellation systems, is done, and active phased array antenna is chosen as an antenna of the radar’s side lobes cancellation system. The array pattern was formed by using antenna synthesis iterative method in order to fulfill the radar’s side lobes cancellation system’s antenna requirements. The antenna modeling results and its’ analysis are presented. The radar’s side lobes cancellation system with active phased array antenna eliminates intentional noise or impulse interference from any side lobe directions of the radar antenna.
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Constantinides, Antonios, and Haris Haralambous. "A Compact Wideband Active Two-Dipole HF Phased Array." Applied Sciences 11, no. 19 (September 26, 2021): 8952. http://dx.doi.org/10.3390/app11198952.

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The design and construction of an upgraded HF quarter-wavelength two-dipole active array with 90° difference feed was implemented in the course of a research project to perform a directional (azimuthal) investigation of interference at HF. The lack of affordable compact antennas to meet the project requirements was the incentive to develop a compact unidirectional antenna, with the maximum possible front-to-back ratio at frequencies of 20–30 MHz, where the dimensions of traditional passive antennas are enormous. By installing a low-noise very-high-input impedance amplifier in each dipole of the array, the effect of the mutual coupling between the two dipoles was reduced, improving the front-to-back (F/B) ratio over a wide frequency range. Electronic steering, easy polarization adjustment, and fast and easy deployment were the key requirements for the construction of the antenna. Therefore, a light and compact design was of the utmost importance to meet the space limitations at the monitoring site, which did not allow the deployment of a traditional HF directional antenna that employs a very long boom and elements.
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Tzanidis, Ioannis, Yang Li, Gary Xu, Ji-Yun Seol, and JianZhong (Charlie) Zhang. "2D Active Antenna Array Design for FD-MIMO System and Antenna Virtualization Techniques." International Journal of Antennas and Propagation 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/873530.

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Full dimension MIMO (FD-MIMO) is one of the key technologies presently studied in the 3GPP for the next generation long-term evolution advanced (LTE-A) systems. By incorporating FD-MIMO into LTE/LTE-A systems, it is expected that system throughput will be drastically improved beyond what is possible in conventional LTE systems. This paper presets details on the 2D active antenna array design for FD-MIMO systems supporting 32 antenna elements. The FD-MIMO system allows for dynamic and adaptive precoding to be performed jointly across all antennas thus achieving more directional transmissions in the azimuth and elevation domains simultaneously, to a larger number of users. Finally, we discuss 2D antenna array port virtualization techniques for creating beams with wide coverage, necessary for broadcasting signals to all users within a sector, such as the CRS (Common Reference Signal).
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Saltin, B. D., Y. Matsumura, A. Reid, J. F. Windmill, S. N. Gorb, and J. C. Jackson. "Material stiffness variation in mosquito antennae." Journal of The Royal Society Interface 16, no. 154 (May 2019): 20190049. http://dx.doi.org/10.1098/rsif.2019.0049.

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The antennae of mosquitoes are model systems for acoustic sensation, in that they obey general principles for sound detection, using both active feedback mechanisms and passive structural adaptations. However, the biomechanical aspect of the antennal structure is much less understood than the mechano-electrical transduction. Using confocal laser scanning microscopy, we measured the fluorescent properties of the antennae of two species of mosquito— Toxorhynchites brevipalpis and Anopheles arabiensis —and, noting that fluorescence is correlated with material stiffness, we found that the structure of the antenna is not a simple beam of homogeneous material, but is in fact a rather more complex structure with spatially distributed discrete changes in material properties. These present as bands or rings of different material in each subunit of the antenna, which repeat along its length. While these structures may simply be required for structural robustness of the antennae, we found that in FEM simulation, these banded structures can strongly affect the resonant frequencies of cantilever-beam systems, and therefore taken together our results suggest that modulating the material properties along the length of the antenna could constitute an additional mechanism for resonant tuning in these species.
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Dissertations / Theses on the topic "Active antenna"

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Scattone, Francesco. "Phased array antenna with significant reduction of active controls." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S168/document.

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L'objectif de cette thèse est d'exploiter les phénomènes des ondes de fuite pour améliorer les performances des antennes classiques à ouverture pour les applications spatiales. Ici, nous considérons des configurations planaires où les ondes de fuite sont excitées entre un plan de masse et un superstrat partiellement réfléchissant. Des réseaux de petites ouvertures sur le plan de masse sont utilisés pour alimenter les antennes considérées. Les structures avec superstrat sont développées en configuration réseaux simples ou réseaux à commande de phase, considérées intéressantes en termes de flexibilité du système pour des liens satellitaires de nouvelle génération.Pour étudier efficacement ces antennes, nous avons développé un outil d'analyse basé sur une approche spectrale avec fonction de Green. Cet outil permet d'analyser les structures proposées en prenant en compte l'impact du couplage mutuel entre les éléments sur les performances de rayonnement avec une réduction du temps de calcul et d'utilisation de mémoire.L'augmentation du gain des structures à ondes de fuite peut ouvrir la voie à la réduction du nombre d'éléments des réseaux associés, et donc des commandes en amplitude et phase. Dans une configuration à ondes de fuite, chaque élément du réseau rayonne avec une ouverture équivalente plus grande, augmentant ainsi l'espacement entre les éléments sans affecter le gain global de la structure. Comme largement expliqué dans le manuscrit, les solutions à ondes de fuite représentent par conséquent un avantage majeur pour les antennes du segment utilisateur.En plus de l'amélioration du gain, la technologie à ondes de fuite peut être efficacement exploitée pour synthétiser le diagramme de rayonnement, en choisissant correctement les paramètres de conception de l'antenne. Cette caractéristique peut être utilisée dans les réseaux à commande de phase, pour produire un diagramme d'élément qui minimise les pertes par dépointage et qui filtre les lobes de réseaux. Une procédure de synthèse pour des antennes réseaux raréfiés à ondes de fuite est ainsi présentée dans le manuscrit, ainsi qu'une nouvelle configuration de réseaux avec superstrat irrégulier. Ce dernier permet de réduire les lobes secondaires de l'antenne en utilisant une excitation uniforme. Cette dernière configuration montre clairement que la capacité de modifier le diagramme de rayonnement est la caractéristique la plus attrayante des antennes planaires à ondes de fuite, pour être utilisée dans des solutions de réseaux à commande de phase
The objective of this thesis is to exploit the leaky-wave phenomena to enhance the performance of classical aperture antennas for space applications. Here, we consider planar configurations where the leaky modes are excited between a ground plane and a partially reflective superstrate. Arrangements of small apertures opening on the ground plane are used to feed the antennas under study. The superstrate-like leaky-wave structures are developed in array or phased array configurations, considered of interest in terms of flexibility of the system for next generation satellite links. In order to efficiently study planar leaky-wave arrays, we have developed an analysis tool based on a Green's function spectral approach. The developed tool allows to precisely analyze the proposed structure by taking into account the impact of the mutual coupling among the elements on the radiation performance of the whole antenna. In addition, it can handle extremely large structures in terms of wavelengths with a small computational effort with respect to commercial tools. In particular, the gain enhancement of leaky-based structures can pave the way to the reduction of the number of elements of the associated phased arrays. In a leaky-wave configuration each element of the array will radiate with a larger equivalent aperture allowing a larger spacing among elements without affecting the final gain of the whole structure. This aspect is particularly important in the case of phased arrays, where phase shifters and control cells are, typically, the most expensive components of the system. As extensively explained in the manuscript, antennas for user segment might find the highest benefit by using leaky-wave solutions. Besides the gain enhancement, the leaky-wave technology can be effectively exploited to conveniently shape the radiation pattern by properly engineering the design parameters of the antenna. This capability can be used in phased arrays to generate a convenient element pattern to minimize the scan losses and filter the grating lobes appearing in the visible space when dealing with periodicities larger than a wavelength. Therefore, a synthesis procedure for thinned leaky-wave arrays is presented in the manuscript. Also, a novel array configuration, the irregular superstrate array, is presented. The irregular superstrate allows the reduction of the side lobes of the antenna below -20 dB in the considered 2.5 % band, using a uniform excitation. This last configuration clearly shows that the shaping capability of leaky-wave antennas is the most appealing feature to be used in phased array solutions
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A, Rahim Mohamad Kamal. "Wideband active antenna." Thesis, University of Birmingham, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404129.

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Adaniya, Hana L. "Wideband active antenna cancellation." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/47896.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.
Includes bibliographical references (leaf 91).
There exists a simultaneous transmit and receive antenna system where the transmitted signal is creating wideband interference of the receiver. To resolve this interference problem, the isolation between the transmit antenna and the receive antenna must be increased. This thesis analyzes and discusses various strategies for antenna isolation and demonstrates the feasibility of an adaptive filtering approach on active signal cancellation. The final system design demonstrates that, with a broadband interference source in close proximity to a receiver, it is possible to provide 30 dB of isolation by using active cancellation.
by Hana L. Adaniya.
M.Eng.
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Lin, Yuanzhi. "Active Antenna Oscillator Array." University of Cincinnati / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1231873914.

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Cummings, Nathan Patrick. "Active Antenna Bandwidth Control Using Reconfigurable Antenna Elements." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/29990.

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Reconfigurable antennas represent a recent innovation in antenna design that changes from classical fixed-form, fixed-function antennas to modifiable structures that can be adapted to fit the requirements of a time varying system. Advances in microwave semiconductor processing technologies have enabled the use of compact, ultra-high quality RF and microwave switches in novel aspects of antenna design. This dissertation introduces the concept of reconfigurable antenna bandwidth control and how advances in switch technology have made these designs realizable. Specifically, it details the development of three new antennas capable of reconfigurable bandwidth control. The newly developed antennas include the reconfigurable ring patch, the reconfigurable planar inverted-F and the reconfigurable parasitic folded dipole. The relevant background work to these designs is described and then design details along with computer simulations and measured experimental results are given.
Ph. D.
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Ventas, Muñoz de Lucas Jesus. "Active- integrated aperture lens antenna." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-303003.

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Luneburg lens antennas are gaining popularity in new communication systems, as increasingly higher frequencies are being used. Broadband fully- metallic implementations of Luneburg lenses, such as Rinehart- Luneburg lenses, constitute simple, cheap and efficient beamformers. However, Luneburg lenses need to have one amplifier per port, which constrains the maximum power that can be transmitted and increases the cost of the system. In this thesis, an investigation to integrate amplifiers within the aperture of Luneburg lenses is conducted. This concept allows for increasing the maximum transmitted power with reduced costs. Special attention has been paid to the design principles. Active integration without altering the Luneburg lens functionality has been a key task in this work. A design in Kaband (2640 GHz) has been also exemplified in order to show the feasibility of the concept. The final design includes transitions to a PCB in the aperture of the Luneburg lens, where amplifiers can be mounted. Good results were obtained in terms of directivity and side- lobe levels, and the antenna achieves a scanning range up to ±64° with reasonable scan losses.
Luneburgs linsantenner blir alltmer populära i nya kommunikationssystem eftersom högre frekvenser används. Det finns bredbandiga Luneburg- linser som är helt metallicof, som Rinehart- Luneburg- linsen, vilket gör den till en enkel, billig och effektiv strålformare. Luneburg- linser måste dock ha en förstärkare per port, vilket begränsar den maximala sändningseffekten och ökar kostnaden för systemet. I den här avhandlingen undersöks hur man kan integrera förstärkare, monterade på ett PCB, i Luneburg- linsernas öppning. Detta tillvägagångssätt gör det möjligt att öka den maximala överförda effekten och minska kostnaderna. Särskild uppmärksamhet har ägnats åt konstruktionsprinciperna. Att hitta en geometri som gör det möjligt att integrera förstärkare inuti utan att ändra Luneburg- linsens strålningsegenskaper har varit en viktig uppgift i detta arbete. En specifik konstruktion för Ka- bandet (2640 GHz) har också utvecklats för att visa att konceptet är genomförbart. Den slutliga utformningen omfattar övergångar till ett kretskort i Luneburg- linsens öppning, där förstärkare kan monteras. Resultaten visar på rimliga värden för riktverkan och sidolobnivåer, och antennen har ett avläsningsområde på upp till ±64°.
Las lentes de Luneburg se están haciendo cada vez más populares en los nuevos sistemas de comunicaciones, debido al uso de frecuencias cada vez más altas. Existen implementaciones totalmente metálicas y de banda ancha de las lentes de Luneburg, como las lentes de Rinehart- Luneburg, lo que las convierte en conformadores de haz simples, baratos y eficientes. Sin embargo, las lentes de Luneburg necesitan tener un amplificador en cada uno de sus puertos, lo que limita la máxima potencia que se puede transmitir e incrementa el coste del sistema. En este trabajo de fin de Máster se lleva a cabo una investigación que busca la integración de amplificadores, montados en una PCB, dentro de la apertura de las lentes de Luneburg. Este enfoque permite transmitir potencias mayores y además reduce costes. Se ha puesto especial atención en los principios de diseño. Encontrar una geometría que permite integrar amplificadores dentro sin alterar las características de radiación de la lente de Luneburg ha sido uno de los puntos clave de este trabajo. También se ha desarrollado un diseño específico en banda Ka (2640 GHz) para mostrar la viabilidad de la idea. El diseño final incluye transiciones a un PCB en la apertura de la lente, donde se pueden incluir los amplificadores. Los resultados muestran valores razonables de directividad y lóbulos secundarios, y la antena permite un rango de escaneo de hasta ±64°.
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Lindberg, Peter. "Wideband Active and Passive Antenna Solutions for Handheld Terminals." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7445.

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Qin, Yi. "Broadband high efficiency active integrated antenna." Thesis, Northumbria University, 2007. http://nrl.northumbria.ac.uk/79/.

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Active integrated antenna (MA) is a very popular topic of research during recent decades. This is mostly due to its advantages, such as compact size, multiple functions and low cost, etc. The MA system can be regarded as an active microwave circuit which the output or input port is free space instead of a conventional 50-ohm interface. The major drawbacks of the conventional MA include narrow bandwidth, low efficiency, etc. An experimental investigation on broadband slot-coupled antenna is carried out, which results an impedance bandwidth of 50 % is achieved by both a ring slot- coupled and square ring slot-coupled patch antenna. An improved design technique for broadband class-E power amplifier (PA) design, based on the theoretical analysis done by Mader [2], is introduced to calculate the circuit parameters. The technique is applied to a RF microwave class-E power amplifier design (PA) that results a bandwidth of 12 % power added efficiency (PAE) greater than 60 % is achieved. The aim of this work is to design broadband high efficiency linearly polarized (LP) and circularly polarized (CP) MA and arrays that will be useful for mobile communication system. The MA does not need conventional matching network between the amplifier and the antenna, because the antenna serves as both a harmonics-tuning network and a radiator. A novel high efficiency broadband LP MA is demonstrated using a ring slot-coupled patch antenna with a class-E PA. It exhibits a PAE over 50 % within a 14.6 % bandwidth. For the first time, a high efficiency broadband CP MA is designed using a class-E PA integrated with a broadband CP antenna. The CP AIA achieves a PAE over 50 % within a 14 % bandwidth. The axial ratio of the CP MA is below 3 dB over a 9 % bandwidth. For further improve the performance, a novel L-shaped slot-coupled broadband CP MA is employed in a 2x2 array. The array consists of four sequentially rotated broadband CP antenna elements with an element spacing of half a free space wavelength. The antenna was designed to operate in the 3G band around 2 GHz. A bandwidth of 22.7 % PAE greater than 50 % is achieved together with a peak PAE of 71.35%. A bandwidth of 27 % axial ratio below 3 dB is resulted.
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Drew, Stephen Arthur. "Active microstrip antenna modelling and characterisation." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.482798.

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Ismail, Widad. "Active integrated antenna (AIA) with image rejection." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412555.

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Books on the topic "Active antenna"

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Ma, Guozhong. Novel receiver architectures using integrated active antenna techniques. Birmingham: University of Birmingham, 2002.

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Simons, Rainee N. Spatial frequency multiplier with active linearly tapered slot antenna array. [Washington, DC: National Aeronautics and Space Administration, 1994.

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Simons, Rainee. Space power amplification with active linearly tapered slot antenna array. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Ormiston, Thomas Dominic. A low noise active quarter wavelength microstrip patch antenna. Birmingham: University of Birmingham, 1999.

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Pogorzelski, Ronald J. Coupled-oscillator based active-array antennas. Hoboken, New Jersey: John Wiley & Sons Inc., 2012.

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Pogorzelski, Ronald J., and Apostolos Georgiadis. Coupled-Oscillator Based Active-Array Antennas. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118310014.

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Singh, Dilbagh. Monolithic microwave and millimetric active antennas. Birmingham: University of Birmingham, 1999.

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Navarro, Julio A. Integrated active antennas and spatial power combining. New York: Wiley, 1996.

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Helszajn, J. Microwave engineering: Passive, active and non-reciprocalcircuits. London: McGraw-Hill, 1992.

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Helszajn, J. Microwave engineering: Passive, active, and non-reciprocal circuits. London: McGraw-Hill, 1992.

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Book chapters on the topic "Active antenna"

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Declercq, Frederick, Hendrik Rogier, Apostolos Georgiadis, and Ana Collado. "Active Wearable Antenna Modules." In Microwave and Millimeter Wave Circuits and Systems, 417–53. Chichester, UK: John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118405864.ch15.

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Izario, Daniel, Yuzo Iano, João Brancalhone, Karine Izario, Gabriel Gomes, and Diego Pajuelo. "5G - Active Antenna Applications." In Proceedings of the 6th Brazilian Technology Symposium (BTSym’20), 513–19. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75680-2_56.

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Tsakalaki, Elpiniki. "Multiple-Active Multiple-Passive Antenna Systems and Applications." In Parasitic Antenna Arrays for Wireless MIMO Systems, 197–236. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7999-4_8.

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Shire, Abdirahman Mohamoud, and Fauziahanim Che Seman. "Analysis of the Active Region of Archimedean Spiral Antenna." In Lecture Notes in Electrical Engineering, 231–39. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07674-4_24.

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Koshelev, V. I., E. V. Balzovsky, and Yu I. Buyanov. "Ultra-wideband Active Receiving Array Antenna with Dual Polarization." In Ultra-Wideband, Short Pulse Electromagnetics 9, 269–76. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-77845-7_31.

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Lekshmi, Babu Saraswathi K., and Jacob I. Raglend. "Design of Wideband Widescan Linear Tapered Slot Antenna for an Active Electronically Scanned Array Antenna." In Lecture Notes in Electrical Engineering, 1489–96. New Delhi: Springer India, 2014. http://dx.doi.org/10.1007/978-81-322-2119-7_145.

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Chew, S. T., and T. Itoh. "Active Antenna Power Combining, Beam Control and 2-Dimensional Combining." In New Directions in Terahertz Technology, 203–20. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5760-5_16.

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Tang, Bo, Mei Wang, and Jinzhu Zhou. "Experimental Study of Electrical Compensation Based on Active Phased Array Antenna." In Lecture Notes in Electrical Engineering, 385–98. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9437-0_42.

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Cui, Kai, Dongming Ge, Runran Deng, Jingli Du, Xuelin Du, and Fengtao Zhang. "Electromechanical and Thermal Synthesis Analysis of Spaceborne Active Phased Array Antenna." In Lecture Notes in Electrical Engineering, 215–29. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9441-7_23.

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Torre, Patrick Van, Luigi Vallozzi, and Hendrik Rogier. "Wearable Active Antenna Modules for Energy-Efficient Reliable Off-Body Communication Systems." In Electromagnetics of Body Area Networks, 261–317. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119082910.ch8.

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Conference papers on the topic "Active antenna"

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Peraza Hernandez, Edwin A., Darren J. Hartl, and Dimitris C. Lagoudas. "Analysis and Design of an Active Self-Folding Antenna." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67855.

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Origami allows for novel approaches to the design of morphing structures. This paper presents a preliminary study on the analysis and design of a self-folding origami antenna. This preliminary study aims to develop and test novel origami analysis and design approaches for problems in morphing antennas. A parabolic dish antenna is considered. The objective is to design a planar sheet with a pattern of smooth folds (as opposed to creased folds generally encountered in the origami literature) that can fold via active material actuation towards the parabolic antenna shape. In the presented process, a mesh discretization of the parabolic shape is first determined. Subsequently, an origami design tool previously developed by the authors is utilized to obtain a planar sheet with a pattern of smooth folds that allows for folding towards the meshed parabolic shape. An origami structural analysis method is then used to simulate the shape memory alloy (SMA) actuation-driven folding of the determined sheet design from the planar reference configuration towards the parabolic configuration. The mesh discretization of the parabolic shape is parameterized and various discretizations are tested and compared considering certain performance outputs. The preliminary results presented here demonstrate the feasibility of active material-based origami in the development of morphing antennas.
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Wang, C. S., H. Bao, and W. Wang. "Coupled Structural-Electromagnetic Optimization and Analysis of Space Intelligent Antenna Structural Systems." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59306.

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For high electromagnetic performances, large space truss antennas should have reflector surface with an extremely high precision. Due to the varied load and some random disturbances, active control strategy is always used in the kind of structure for the precise surface. For the improvement of the electromagnetic performances, an electromechanical synthesis optimization model of space antenna structure systems is developed based on the antenna’s characteristics, which adopts the axial gain of antenna and power consumption of actuators as the objective functions, and structural material strength and actuator’s capability as constraint conditions. The application of model to an 8-m antenna structure demonstrates the potential for significant improvement. The analysis results indicate the benefit of including electrical performance in model for necessary effort for shape control of large space antenna reflectors.
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Shirokov, Igor, and Elena Shirokova. "Active Antenna." In 2018 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2018. http://dx.doi.org/10.1109/apusncursinrsm.2018.8608975.

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Xiang, Ling, Jiang Yonghua, Jiang Zhisheng, and Gao Weiliang. "Nonlinear Active Antenna." In 2007 International Workshop on Anti-Counterfeiting, Security and Identification. IEEE, 2007. http://dx.doi.org/10.1109/iwasid.2007.373700.

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Kumar, Mithilesh, Ananjan Basu, and Shiban K. Koul. "Active UWB antenna." In 2010 URSI International Symposium on Electromagnetic Theory (EMTS 2010). IEEE, 2010. http://dx.doi.org/10.1109/ursi-emts.2010.5637195.

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Cubukcu, E., E. A. Kort, K. B. Crozier, and F. Capasso. "Active optical antenna." In 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference. IEEE, 2006. http://dx.doi.org/10.1109/cleo.2006.4629073.

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Edvardsson, O. "Will active antenna modules revolutionize mobile phone antennas?" In 11th International Conference on Antennas and Propagation (ICAP 2001). IEE, 2001. http://dx.doi.org/10.1049/cp:20010278.

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Elbahri, M., M. K. Hedayati, and M. Abdelaziz. "Active organic dipolar antenna." In 2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS). IEEE, 2016. http://dx.doi.org/10.1109/metamaterials.2016.7746473.

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Shirokov, Igor B., and Elena I. Shirokova. "Active RX-TX Antenna." In 2020 7th All-Russian Microwave Conference (RMC). IEEE, 2020. http://dx.doi.org/10.1109/rmc50626.2020.9312319.

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Upadhayay, Madhur Deo, Mahesh P. Abegaonkar, Ananjan Basu, and Shiban K. Koul. "Dual frequency active antenna." In 2011 IEEE Applied Electromagnetics Conference (AEMC). IEEE, 2011. http://dx.doi.org/10.1109/aemc.2011.6256826.

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Reports on the topic "Active antenna"

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White, D. J., D. R. Bowling, and P. L. Overfelt. Active Impedance Matching for Superdirective, Super-Gain HTS Antenna Arrays. Fort Belvoir, VA: Defense Technical Information Center, March 1996. http://dx.doi.org/10.21236/ada306546.

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J.-K. Park, et al. Observation of EHO in NSTX and Theoretical Study of its Active Control Using HHFW Antenna. Office of Scientific and Technical Information (OSTI), January 2013. http://dx.doi.org/10.2172/1059935.

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