Results 21 to 30 of about 624,104 (285)
Metamaterial-Based Antenna Performance Enhancement for MIMO System Applications
IEEE Access, 2021 This paper presents a method for designing a new two-element ultra-wideband (UWB) multiple-input-multiple-output (MIMO) antenna. We propose the design of an ultra-wideband antenna has been proposed with a study of its properties.
Hedi Sakli +3 more
doaj +1 more source
Influence of the Antennas on the Ultra-Wideband Transmission
EURASIP Journal on Advances in Signal Processing, 2005 Summary: Spectrum is presently one of the most valuable goods worldwide as the demand is permanently increasing and it can be traded only locally. Since the United States Federal Communications Commission (FCC) has opened the spectrum from 3.1 GHz to 10.6 GHz, that is, a bandwidth of 7.5 GHz, for unlicensed use with up to -41.25 dBm/MHz EIRP, numerous ...
Sörgel, W., Wiesbeck, Werner
openaire +3 more sources
A time domain spherical near-field measurement facility for UWB antennas employing a hardware gating technique [PDF]
Advances in Radio Science, 2010 A spherical near-field antenna measurement facility employing a time domain hardware gating technique is presented. On-off keyed sinusoidal impulses are used as stimuli requiring wideband antennas with a bandwidth in excess of 400 MHz.
M. D. Blech +6 more
doaj +1 more source
Modelling and characterisation of antennas and propagation for body-centric wireless communication [PDF]
, 2010 PhDBody-Centric Wireless Communication (BCWC) is a central point in the development of fourth generation mobile communications. The continuous miniaturisation of sensors, in addition to the advancement in wearable electronics, embedded software ...
Sani, Andrea
core +4 more sources
Tightly Coupled Array Antennas for Ultra-Wideband Wireless Systems
IEEE Access, 2018 Tightly coupled array (TCA) antenna has become a hot topic of research recently, due to its potential of enabling one single antenna array to operate over an extremely wide frequency range.
Yonggang Zhou +8 more
doaj +1 more source
, 2015 The focus of UWB antenna research activity has matured in recent years and currently mainly concentrates on applications such as biomedicine and security. Early UWB antenna designs were driven by the FCC allocation of spectrum in 2002 and focussed on obtaining wide impedance bandwidths with reasonable group delay characteristics.
Ammann, Max +2 more
openaire +3 more sources
Applying of Luneburg lens for multi-beam TEM-horn antenna
The Journal of Engineering, 2019 Here, a multi-beam TEM-horn antenna with beam direction is proposed. Presented construction allows obtaining scanning beam and complicated antenna patterns, thus it can be used as substitute of ultra-wideband phased array antennas.
Anatoly M. Bobreshov +4 more
doaj +1 more source
Antenna Evaluation for Ultra-Wideband Microwave Imaging
International Journal of Antennas and Propagation, 2010 Numerous antenna designs have been proposed for microwave breast imaging utilizing an ultra-wideband frequency range. The antennas are typically compact, operate in an immersion medium, and have a band covering at least 2–10 GHz.
Jeremie Bourqui +3 more
doaj +1 more source
Ultra-wideband radio signals distribution in FTTH networks [PDF]
, 2008 The use of an ultra-wideband (UWB) radio technique is proposed as a viable solution for the distribution of high-definition audio/video content in fiber-to-the-home (FTTH) networks.
Roberto Llorente +13 more
core +1 more source
Towards a hardware implementation of ultra-wideband beamforming [PDF]
, 2010 This paper discusses and analyses the hardware implementation of an ultra-wideband (UWB) beamformer for UWB Impulse Radio data transmission. We use a Complex Programmable Logic Device (CPLD) acting as the binary baseband information source.
Wolfgang Gartner +9 more
core +1 more source