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## Meet the editor

Rafael Vargas-Bernal obtained his degree in electronics and communications engineering from the University of Guanajuato in 1995, and his master's and Doctor of Science degrees in electronics from the National Institute of Astrophysics, Optics and Electronics (INAOE) in 1997 and 2000, respectively. Since 2000, he has held the position of full professor at the University of Guanajuato, the Instituto Tecnológico Superior de Irapuato,

and Universidad de la Salle Bajío. He is a reviewer for *ACS, RSC, Elsevier, IEEE, MDPI, Hindawi,* and *Wiley* journals. He has published 17 articles in indexed journals and 37 book chapters. He has published one book for IntechOpen on hybrid nanomaterials. His areas of interest are wireless communications, nanomaterials, and biomedical devices.

### Contents


Preface

The urgent need to develop wireless broadband communication systems is driving research into both devices and applications for delivering large amounts of information at high data rates. One of the serious candidate technologies to achieve these capabilities is ultra-wideband (UWB). This technology uses very narrow pulses with nanosecond periods and can achieve wide bandwidths over short distances using low power densities. Applications such as real-time location systems for industrial and medical applications are made possible by UWB technology. With the need for more secure and cost-effective options than Bluetooth or Wi-Fi, there is growing research interest in UWB technology across the world, and smart devices based on UWB

This book presents work by different researchers around the world on both devices and applications based on UWB technology. The contributions are arranged in two sections covering UWB technology-based devices and applications, respectively.

Chapter 1 introduces different alternatives that UWB technology is implementing to improve its device design capabilities, taking advantage of materials science to develop more accurate radio frequency location systems. Potential devices include transmitters, antennas, filters, and resonators for applications in emerging UWB systems. A polygonal patch antenna proposed in Chapter 2 is one of the novel devices that can be implemented using UWB technology. This type of antenna can operate in wide bands, reducing the effect of the ground plane through computer simulation of electrical models using a hexagonal geometry with a high gain. The authors exploit a reflector based on an artificial magnetic conductor that offers

Wideband real-time delay cells for wideband multiple antennas for timed array receivers are proposed in Chapter 3. To optimize the performance required for UWB technology, a compact silicon-based integrated circuit design is suggested for the antennas, based on transmission lines and ladder networks operating at GHz. Active

Chapter 4 examines the SS-TWR (single-sided two-way ranging) and DS-TWR (double-sided two-way ranging) techniques that exploit the 802.15.4a and 802.15.4z standards to develop navigation and active tracking systems. With bidirectional exchanges between the client and the anchor, it is possible to determine the distance between the transmitters and receivers to optimize signal arrival times to achieve

Another innovative application of UWB technology is the development of radio impulse sensing presented in Chapter 5. This type of sensing exploits the integration of location and radar functionalities to transmit signals through hardware with high resolution and multiple communication channels, enabling mobility and transportation applications.

technology will be in widespread use in the coming decades.

promising capabilities for the development of UWB technology.

all-pass filters as TTD cells are presented for this purpose.

wireless communication using UWB technology.
