Results 111 to 120 of about 2,238 (164)
Metamaterial-enhanced MIMO antenna array system for non-invasive cerebral hemorrhage assessment in elderly and disabled patients. [PDF]
Sci RepSheriff N +6 more
europepmc +1 more source
Electronics Letters, 2010 An ultra-wideband loop antenna is proposed that is based on a wavelength loop antenna and a slot antenna. The self-complementary principle is applied to the designed ultra-wideband antenna. The antenna operates as a loop antenna in the low frequency band (0.3-1-GHz) and as a slot antenna in the high frequency band (1-14.2-GHz).
Y Shin
exaly +4 more sources
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IEEE Communications Magazine, 2004
Ultra wideband antennas are specifically designed to transmit and/or receive very short time durations of electromagnetic energy. It is well known that UWB antenna design remains the major factor in the progress of UWB technology. This article describes a study of conventional antennas and why they are not suitable for a UWB system.
Kamya Yekeh Yazdandoost, Ryuji Kohno
exaly +2 more sources
Ultra wideband antennas are specifically designed to transmit and/or receive very short time durations of electromagnetic energy. It is well known that UWB antenna design remains the major factor in the progress of UWB technology. This article describes a study of conventional antennas and why they are not suitable for a UWB system.
Kamya Yekeh Yazdandoost, Ryuji Kohno
exaly +2 more sources
Ultra-wideband sources and antennas
Ultra- Wideband Short-Pulse Electromagnetics 4 (IEEE Cat. No.98EX112), 2002Ultra-Wideband (UWB) sources and antennas are of interest for a variety of potential applications that range from transient radar systems to communications systems. In this paper, we discuss the research issues and progress being made in gas, oil and solid state switching, UWB sources, and antennas.
William D. Prather +10 more
openaire +1 more source
Novel antennas for ultra‐wideband communications
Microwave and Optical Technology Letters, 2004AbstractTwo novel antennas for UWB communications, both inspired from bowtie and triangular patch structures, are presented and tested. This paper proposes their study and optimization in order to cover the new WPAN standard and facilitate their integration on communication devices.
Fortino, Nicolas +3 more
openaire +1 more source
Design of a directive ultra-wideband antenna
2nd European Conference on Antennas and Propagation (EuCAP 2007), 2007This work presents a novel directive Ultra-Wideband (UWB) antenna. The antenna shows an average gain of 7 dB over the band of interest (i.e., 4-10 GHz) with a return loss better than -10 dB. A broadband balun is also included in the realization. The antenna transfer function has been measured and the effect on pulse transmission has been evaluated ...
F. Merli +3 more
openaire +3 more sources
Miniaturization of ultra-wideband antennas
2008 Asia-Pacific Microwave Conference, 2008This talk briefly introduces design challenges of ultra-wideband (UWB) antennas. An outlined of special design considerations are presented from a systems point of view, followed by some state-of-the-art solutions. Then, the miniaturization technology of UWB antennas is addressed.
openaire +1 more source
2012
Chipless RFID tags require a significant amount of spectrum in order to encode their data. Hence, ultra wideband antennas seem like the obvious solution as the antenna of choice for the chipless RFID tag. The theory of operation and parametric study of circular disc monopole antennas printed on dielectric laminates is presented.
Stevan Preradovic +1 more
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Chipless RFID tags require a significant amount of spectrum in order to encode their data. Hence, ultra wideband antennas seem like the obvious solution as the antenna of choice for the chipless RFID tag. The theory of operation and parametric study of circular disc monopole antennas printed on dielectric laminates is presented.
Stevan Preradovic +1 more
openaire +1 more source
An ultra-wideband receiving antenna array
2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013An UWB impulse radio receiving antenna array based on delay and sum beamforming is presented. The array is implemented using a simple impulse radio radar transceiver. The presented radar transceiver is fabricated in 90 nm TSMC technology, and it has a high speed sampler with sampling rate of 10 GHz which recovers the received signal with sufficient ...
Malihe Zarre Dooghabadi +2 more
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Increasing directionality of planar ultra‐wideband antennas
Microwave and Optical Technology Letters, 2009AbstractA directional planar ultra‐wideband antenna is described and characterized through numerical and experimental results. The antenna is composed of a disc monopole fed by a 50‐Ω microstrip line with an L‐shaped ground plane. Simulations and measurements performed in an anechoic chamber demonstrate that the structured ground plane behaves as a ...
LOCATELLI, Andrea +7 more
openaire +4 more sources