Results 31 to 40 of about 500,244 (287)
, 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
Cognospectrum: Spectrum Adaptation and Evolution in Cognitive Ultra-Wideband Radio
, 2005 Cognitive Ultra Wideband (UWB) Radio is proposed to exploit the advantages of combining Cognitive Radio with Ultra Wideband technologies. In order to realize Cognitive UWB Radio, multiple pulse waveform adaptations have been investigated for producing ...
K. Yazdandoost +3 more
core +1 more source
Ultra wideband gigabit powerline communication [PDF]
, 2009 PhDPowerline Communication (PLC) has long been established for low data rate applications by the electric supply companies. Since 1991, the European CENELEC standard EN 50065 has ruled the use of 3 - 148.5KHz frequency range for narrow band PLC ...
Chen, Shuxian
core +4 more sources
A New Time-Hopping Multiple Access Communication System Simulator: Application to Ultra-Wideband
EURASIP Journal on Advances in Signal Processing, 2005 Time-hopping ultra-wideband technology presents some very attractive features for future indoor wireless systems in terms of achievable transmission rate and multiple access capabilities.
José M. Páez-Borrallo +1 more
doaj +1 more source
Wideband Filtering Power Divider With Ultra-Wideband Harmonic Suppression and Isolation
IEEE Access, 2016 In this paper, a wideband filtering power divider (PD) with ultra-wideband harmonic suppression and isolation is proposed. The dual coupled-line sections are embedded to the conventional quarter-wavelength transmission lines, which helps to extend the ...
Yongle Wu +4 more
doaj +1 more source
An Investigation of Bluetooth Mergence with Ultra Wideband [PDF]
2008 Third International Conference on Broadband Communications, Information Technology & Biomedical Applications, 2008 This paper presents an investigation into some merging options between an upper-layer Bluetooth (BT) protocol stack with a lower-layer ECMA-368/9 ultra wideband (UWB) radio connection. A Bluetooth over ultra wideband (BToUWB) system is modeled by channeling an existing compliant Bluetooth connection's data over a software implemented UWB medium access ...
Etienne van der Linde +1 more
openaire +3 more sources
IEEE Access, 2018 A novel broadband circular-polarized array antenna with ultra-wideband low radar cross section (RCS) is proposed. The array is made up of 2 × 2 identically circular-polarized sub-arrays in a chessboard configuration.
Lili Cong +3 more
doaj +1 more source
Advanced Functional Materials, EarlyView.An Alhagi maurorum inspired hierarchical composite membrane (NFCu) was developed by integrating heavy metal remediation and solar‐driven interfacial evaporation in a single platform. Beyond the photothermal effect, a localized photocatalytic process is realized on the CuO surface, deepening the mechanistic understanding of light–matter–water ...
Yuqiong He +9 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Eu‐doped {ZnCdO/ZnO} structures grown on Si are developed, showcasing dual‐functionality controlled by europium doping. While high europium concentration transforms the device into an ultrafast, self‐powered photodetector, low‐doped structures can be used as an optoelectronic synapse.
Igor Perlikowski +3 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Nitride MXenes remain constrained by a persistent gap between computational prediction and experimental realization. This Review identifies the thermodynamic, kinetic, and chemical barriers limiting their synthesis, critically evaluates emerging fabrication routes, and proposes a multidimensional computational‐experimental framework to accelerate the ...
Naresh Varnakavi, Masoud Soroush
wiley +1 more source