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time domain, according to Formula BW×T ≥4/π, which expresses the connection between bandwidth (BW) and pulse duration (T). For traditional communication technologies such as WiFi, bandwidths are limited to e.g. 20 MHz, resulting in a pulse width larger than 4 nanoseconds. In contrast, UWB systems of 500 MHz have time pulses of only 0.16 ns ...
UWB is an IEEE 802.15.4a/z standard technology optimized for secure micro-location-based applications. It enables distance and location to be calculated indoors or outdoors with unprecedented accuracy – within a few centimeters – by measuring the time it takes radio signals to travel between devices. Along with centimeter-level
UWB communication is achieved by sending ultra-short, time-domain pulses in predefined bursts and sequences to achieve different functionalities. A single pulse can be less than 1ns long, which results in a very large bandwidth in the frequency domain.
In the first part of this section, we will demonstrate the time-domain calculation of the group delay and amplitude variation at the example of the coplanar UWB antenna presented in Sect.4.2.
This book presents the theory, analysis, and design of ultra-wideband (UWB) radar and sensor systems (in short, UWB systems) and their components. UWB systems find numerous applications in the military, security, civilian, commercial and medicine fields.
Principles of UWB vTime Domain - Extremely short pulses - Very low duty cycle vFrequency Domain - Ultra wide spectrum - Low power spectral density - Acceptable interference with other users
1 sty 2011 · The computation of group-delay data in an actual application of pulsed transmission is one of the clear advantages of time-domain over frequency-domain techniques. The time-domain modelling procedure presented here is applied to two different printed-circuit UWB antennas, and agreement with frequency-domain computations and measurements is ...
