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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.
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.
1 Introduction. There are multiple techniques for generating UWB signals with various data modulation and randomization schemes. This Annex describes frequency-domain and time-domain measurement techniques of power spectral density for UWB transmissions and for all types of UWB signals.
In this introductory chapter, we reviewed the history, background, and basic concepts of UWB communications. We identified the major advan-tages and challenges of this emerging technology and reviewed the funda-mental differences between narrowband, wideband, and ultra-wideband communications.
In the first part of this chapter, we will demonstrate the time-domain calculation of the group delay and amplitude variation at the example of the coplanar UWB antenna presented in Chap. 2. The second part applies the same technique to the microstrip antenna presented in [9, 10].
The use of very short RF pulses. Since short pulses have very wide frequency bandwidth, it is termed “Ultra WideBand” or “UWB”. FCC defines UWB as a 10 dB bandwidth > 500 MHz or > 20%. TDC’s systems are typically > 2 GHz and > 60%. Actual UWB Pulse and Its Spectrum.
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
