1,320 resources related to Active Antennas
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ICC 2021 - IEEE International Conference on Communications
IEEE ICC is one of the two flagship IEEE conferences in the field of communications; Montreal is to host this conference in 2021. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicize themselves and their products among the leaders of communications industries from all over the world.
This symposium pertains to the field of electromagnetic compatibility.
IEEE Global Communications Conference (GLOBECOM) is one of the IEEE Communications Society’s two flagship conferences dedicated to driving innovation in nearly every aspect of communications. Each year, more than 2,900 scientific researchers and their management submit proposals for program sessions to be held at the annual conference. After extensive peer review, the best of the proposals are selected for the conference program, which includes technical papers, tutorials, workshops and industry sessions designed specifically to advance technologies, systems and infrastructure that are continuing to reshape the world and provide all users with access to an unprecedented spectrum of high-speed, seamless and cost-effective global telecommunications services.
2020 IEEE International Symposium on Circuits and Systems (ISCAS)
The International Symposium on Circuits and Systems (ISCAS) is the flagship conference of the IEEE Circuits and Systems (CAS) Society and the world’s premier networking and exchange forum for researchers in the highly active fields of theory, design and implementation of circuits and systems. ISCAS2020 focuses on the deployment of CASS knowledge towards Society Grand Challenges and highlights the strong foundation in methodology and the integration of multidisciplinary approaches which are the distinctive features of CAS contributions. The worldwide CAS community is exploiting such CASS knowledge to change the way in which devices and circuits are understood, optimized, and leveraged in a variety of systems and applications.
The world's premier EDA and semiconductor design conference and exhibition. DAC features over 60 sessions on design methodologies and EDA tool developments, keynotes, panels, plus the NEW User Track presentations. A diverse worldwide community representing more than 1,000 organizations attends each year, from system designers and architects, logic and circuit designers, validation engineers, CAD managers, senior managers and executives to researchers and academicians from leading universities.
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
IEEE Antennas and Wireless Propagation Letters (AWP Letters) will be devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation.
Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission
Broadcast technology, including devices, equipment, techniques, and systems related to broadcast technology, including the production, distribution, transmission, and propagation aspects.
Tenth International Conference on Antennas and Propagation (Conf. Publ. No. 436), 1997
Integrated active antennas are of increasing interest as system designers require more complex functions to be implemented in reduced space. Many of these systems require very low levels of harmonic and spurious radiation in order to meet electromagnetic compatibility specifications. Active antennas introduce nonlinear devices directly into the antenna and thus they can exhibit high levels of harmonic radiation, moreover, ...
The Second European Conference on Antennas and Propagation, EuCAP 2007, 2007
In this work, novel potentialities of dielectric resonators are investigated for their possible use in active antennas, as an alternative to patch configurations. The main problem of avoiding spurious radiation at multiple harmonics is analysed here in connection with suitable modifications of the basic geometries, involving notching or, more generally, insertions of dielectric sectors with different permittivity. Comparisons have been ...
2017 27th International Conference Radioelektronika (RADIOELEKTRONIKA), 2017
Antennas are key elements of every radio device. As their dimensions are proportional to the operational wavelength, they are becoming the limiting element for handheld devices operating at lower frequencies. In this article, the novel concept of active receiving and transmitting antennas is proposed for an M-sequence UWB (ultra wide band) ground penetrating radar (GPR) to minimize dimensions, complexity and ...
2018 International Symposium on Antennas and Propagation (ISAP), 2018
In this paper, we briefly review the recent progress on self-oscillating active integrated antenna (AIA) designs using metamaterial resonators, as it presents an important breakthrough in improving the antenna performance in terms of dc-to-RF conversion efficiency, phase noise, etc. To be specific, it solves the long-term paradox in selecting the quality (Q) factor of the frequency selective element in an ...
IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010), 1999
A full-wave fast wave concept iterative technique is developed to analyze single and stacked microstrip active antennas with arbitrary shape. The wave concept is developed to express the boundary conditions on the radiating surfaces in term of the waves, which are solved using the iterative technique. With the help of the modal FFT-algorithm an efficient code is developed which allows ...
Brooklyn 5G - 2015 - Edward G. Tiedemann Jr. - Multiple Antennas in Wireless Systems (MAWS)
IMS 2014: Wideband mmWave Channels: Implications for Design and Implementation of Adaptive Beam Antennas
Research, Development and Field Test of Robotic Observation Systems for Active Volcanic Areas in Japan
IMS 2011 Microapps - Mixed-Signal Active Load Pull - The Fast Track to 3G/4G Amplifier Design
IMS 2011 Microapps - Active and Hybrid Load Pull - A Paradigm Shift
MicroApps: Using Digitizers to Characterize Modern Phased Array Antennas
IMS 2012 Microapps - Reducing Active Device Temperature Rise and RF Heating Effects with High Thermal Conductivity Low Loss Circuit Laminates
IEEE Edison Medal - Eli Yablonovich - 2018 IEEE Honors Ceremony
MicroApps: Connectors to Antennas to Waveguide: User-Confgurable and Parameterized 3D EM Model Libraries (AWR)
IMS 2014:Active 600GHz Frequency Multiplier-by-Six S-MMICs for Submillimeter-Wave Generation
Heritage Circle - Reddy
2011 IEEE Awards Alexander Graham Bell Medal - Arogyaswami J. Paulraj
Dorothy, we're not in Kansas anymore, we are in Impedance Land. Oh my! EMC Webinar
HKN: Industry Connections Panel
Massive MIMO at 60 GHz vs. 2 GHz - Eric Larsson: Brooklyn 5G Summit 2017
Transceiver Systems for mmWave Application - Mats Carlsson - RFIC Showcase 2018
Millimeter Wave Mobile Communications for 5G Cellular: It Will Work!
Brooklyn 5G - 2015 - Ali M. Niknejad - Going the Distance with CMOS: mm-Waves and Beyond
IMPASS: Intelligent Mobility Platform with Active Spoke System
Integrated active antennas are of increasing interest as system designers require more complex functions to be implemented in reduced space. Many of these systems require very low levels of harmonic and spurious radiation in order to meet electromagnetic compatibility specifications. Active antennas introduce nonlinear devices directly into the antenna and thus they can exhibit high levels of harmonic radiation, moreover, due to size constraints, filters can not be easily added as in conventional systems. In the case of active receiving antennas it seems that by suppressing the harmonic resonances of the antenna the harmonic reception problem can be reduced. However, with patch oscillators, due to the interdependence of the active device and the patch, the solution to the problem of harmonic radiation is more complex. This work aims to investigate these problems, especially in the case of the patch oscillator since these devices seem to pose the greatest challenge. The final goal is to obtain closed form expressions for the level of harmonics in terms of physical circuit parameters. Although numerical methods could be used to solve this problem it is felt that greater physical insight can be obtained from closed form expressions, allied to this they will be useful for CAD of patch oscillators. Closed form expressions would allow designers to realise low levels of harmonic radiation either by modifying the patch geometry or by altering the active device configuration.
In this work, novel potentialities of dielectric resonators are investigated for their possible use in active antennas, as an alternative to patch configurations. The main problem of avoiding spurious radiation at multiple harmonics is analysed here in connection with suitable modifications of the basic geometries, involving notching or, more generally, insertions of dielectric sectors with different permittivity. Comparisons have been carried out on the relevant radiation performances, emphasizing which solutions seem to be more promising.
Antennas are key elements of every radio device. As their dimensions are proportional to the operational wavelength, they are becoming the limiting element for handheld devices operating at lower frequencies. In this article, the novel concept of active receiving and transmitting antennas is proposed for an M-sequence UWB (ultra wide band) ground penetrating radar (GPR) to minimize dimensions, complexity and costs of the antennas. Radiation principles of selected electrically short antennas are described and appropriate active circuits are designed as well. Their performance is verified by measurements in the UWB system. Using the electrically short antennas with active circuits designed in this work, 8 dB higher received signal level has been achieved in lower part of the frequency band while reducing costs, dimensions and weight of the antennas approximately 10-fold.
In this paper, we briefly review the recent progress on self-oscillating active integrated antenna (AIA) designs using metamaterial resonators, as it presents an important breakthrough in improving the antenna performance in terms of dc-to-RF conversion efficiency, phase noise, etc. To be specific, it solves the long-term paradox in selecting the quality (Q) factor of the frequency selective element in an oscillating AIA by decoupling the radiating and oscillating parts. The design philosophy is briefly reviewed and some new idea on reconfigurability is proposed.
A full-wave fast wave concept iterative technique is developed to analyze single and stacked microstrip active antennas with arbitrary shape. The wave concept is developed to express the boundary conditions on the radiating surfaces in term of the waves, which are solved using the iterative technique. With the help of the modal FFT-algorithm an efficient code is developed which allows a rapid and accurate characterization of arbitrary shaped antennas embedded in single and multilayered dielectric without the trial functions usually used in the conventional integral method. The time saving factor is about 20 compared to the conventional numerical integral methods. Field distribution and input admittance are derived.
Planar electronic steerable active antennas based on all-silicon solutions are rapidly being deployed in a wide range of millimeter wave applications including 5G communications infrastructure, satellite communications terminals, and radar systems. For over 50 years, advancements in Si devices have followed Moore's Law allowing today's Silicon to revolutionize applications where previously only III-V materials were used. Silicon is now fully capable of providing high performance devices that work at mmwave frequencies. This enables low cost planar phased arrays to be deployed for volume commercial applications across many applications. This paper focuses on some of those applications, shows that the architectures being deployed across multiple markets are similar in nature, and provides examples of industry leading Si based IC and array solutions that enable these active antennas.
Recently, in preparation for the upcoming 5G systems, the telecom industry has been showing a great interest in high frequency active antennas. We present a brief overview of the innovative design solution developed at Gapwaves for mmwave digital beamforming applications, capable of addressing all the associated technical issues. We review the general antenna architecture and components and explain how gapwaves technology enables us to achieve high performance, highly integrated active antennas in a cost effective way.
In this paper, two active antennas with modulation and demodulation functions are introduced. A patch antenna integrated with two Schottky diodes is implemented to fulfil single sideband modulation and I&Q demodulation. A variation of this configuration can carry out double sideband modulation with carrier suppression and homodyne detection. Moreover, some parameters of the active antennas, such as conversion loss and radiation pattern are measured. The active antennas have potential use for direct-conversion radio transceivers in digital communication.
Many integrated and active antennas have been developed at Texas A&M University. The applications of using these active antennas for communications, sensors, RFIDs, and spatial power combining applications are emerging. This paper discusses these applications.
Active antennas traditionally employ T/R modules comprised of amplifiers, phase shifters and step attenuators. These modules are normally mounted in an orientation orthogonal to the plane of the array making the antenna bulky, heavy, and expensive to manufacture. In contrast highly integrated silicon ICs allow all electronic functions to be assembled on one side of a multilayer PCB within the lattice spacing driven by wavelength constraints. Placing planar radiating elements on the other side of this PCB allows for low cost and low weight active antennas. This paper describes two ICs developed for X-band radar applications. One of them is a highly integrated silicon IC designed in 0.13um BiCMOS technology used for beam forming and the other is a III-V IC that provides high output power for transmit function and low noise amplifier with appropriate limiting for the receive function. Both these ICs are sized such that they fit in required lattice spacing on one side of a multi-layer PCB.
To specify protocols for the measurement of the peak spatial-average specific absorption rate (SAR) in a simplified model of the head of users of hand-held radio transceivers used for personal wireless communications services and intended to be operated while held next to the ear. It applies to contemporary and future devices with the same or similar operational characteristics as contemporary ...
Revise and develop specifications for preferred methods for measuring and computing external radiofrequency electromagnetic fields to which persons may be exposed. In addition, the document will specify preferred methods for the measurement and computation of the resulting fields and currents that are induced in bodies of humans exposed to these fields over the frequency range of 100 kHz to 300 ...
Research, compile, and consolidate information leading to the publication of a standard for exchanging DSRC information, providing for bi-directional message transmission and device control, in a manner which is compatible with but independent of the ASTM efforts to specify DSRC Layers 1 and 2. This will entail specifying the transponder resources, the transponder resource manager, the application message sets, and ...
This recommended practice describes 1) methods for measuring external electric and magnetic fields and contact currents to which persons may be exposed, 2) instrument characteristics and the methods for calibrating such instruments, and 3) methods for computation and the measurement of the resulting fields and currents that are induced in bodies of humans exposed to these fields. This recommended practice ...